JP5960096B2 - Video distribution system and video distribution method - Google Patents

Description

  The present invention relates to a video distribution system and a video distribution method, and more particularly, to a video distribution system and a video distribution method in which a viewer selects his / her favorite place from videos that are constantly photographed over a wide area and views it live.

  Conventionally, viewers in remote locations away from event venues can select their favorite range from the video shot at the event venue and watch them live using the viewer's television or mobile terminal Various systems have been proposed (for example, Non-Patent Document 1).

  For example, as a method of viewing a live video in a desired direction of the viewer, there is a method in which the viewer remotely operates the camera platform using a web camera having a remotely operable camera platform and points the web camera in a desired direction. It is known (for example, Non-Patent Document 2).

  There is also known a method in which live video is captured in a wide range in advance, and a portion desired by the viewer is cut out and distributed. In this case, a method of shooting a wide range of live video by combining videos shot by a plurality of cameras, a method of shooting a wide range of live video with a single camera capable of shooting a wide range with high resolution, and Is known (for example, Non-Patent Document 3).

Hideaki Kimata, Daisuke Ochi, Akio Kameda, Hajime Noto, Katsuhiko Fukazawa, and Akira Kojima, “Mobile and Multi-device Interactive Panorama Video Distribution System”, IEEE GCCE 2012, Oct, 2012. Toshio Tanaka, “Establishing a Simple Web Camera System Made with an Inexpensive Commercial USB Camera and a Personal Computer”, Transistor Technology December 2002, p.196-197. Kazuma Yamazawa, Naokazu Yokoya, "Internet fixed point camera using omnidirectional camera and JAVA applet", FIT (Information Science and Technology Forum) 2002, I-7

  However, in the method using the pan head that can be operated remotely, while a viewer is viewing a video with the web camera pointing in his / her preferred direction, another viewer can view a video in a different direction. There was a problem that it was not possible, that is, there was a problem that a plurality of people could not watch images in different directions at the same time.

  In addition, the method of shooting a wide range of live video by combining video shot with multiple cameras and cutting out and distributing the portion requested by the viewer requires calculation costs for combining multiple videos. There was a problem that the delay of delivery became large.

  In addition, in a method of shooting a wide range of live video using a camera with a high resolution and capable of shooting a wide range, and cutting out and distributing a portion desired by the viewer, a normal camera exceeds 180 degrees. Since a wide range cannot be taken, a camera having an omnidirectional lens, a fish-eye lens, or the like is required, which increases the cost. In addition, if an omnidirectional lens or fisheye lens is used, the distortion of the image will increase, and in order to make the clipped image appear uncomfortable, it requires processing that requires computational cost of image deformation, resulting in a large delay in video distribution. There was a problem of becoming.

  As described above, in the related art, there is a problem that it is impossible to simultaneously view a plurality of viewers simultaneously viewing live video in different directions and to reduce a live video distribution delay.

  Accordingly, an object of the present invention made in view of the above point is to provide a video distribution system that allows a plurality of viewers to simultaneously view a live video in different directions and to reduce a live video distribution delay. And providing a video distribution method.

  In order to solve the above problems, a video distribution system according to the present invention is a video distribution system including a video acquisition device, a distribution server, and a video presentation device, and the video acquisition device includes a plurality of video imaging units. The distribution server includes: a video input unit that receives a plurality of videos captured by the plurality of video shooting units; a video source ID superposition unit that superimposes an identifier of the video shooting unit on the plurality of videos; An identifier is superimposed based on the display instruction receiving unit that receives information of the video shooting unit that is shooting the video range that the user desires to watch and the information of the video shooting unit received by the display instruction receiving unit A video selection instruction unit for instructing a video to be selected from the plurality of videos, and a video selected from the plurality of videos on which an identifier is superimposed based on an instruction from the video selection instruction unit, and a single stream video And a video distribution unit that distributes the stream video generated by the video selection unit to the video presentation device, wherein the video presentation device requests viewing from the viewer. The image capturing unit that captures the image range is specified, the display range specifying unit that specifies the clipping range to be cut out from the image captured by the image capturing unit, and the image capturing specified by the display range specifying unit A display instruction transmitting unit that transmits information of a unit to the distribution server, a video receiving unit that receives the stream video distributed by the distribution server, and the video superimposed on the stream video received by the video receiving unit Video source ID extraction unit for extracting the identifier of the photographing unit, information on the cutout range specified by the display range specifying unit, and the video source ID extraction unit extracted Based on the identifier information of the video recording unit, a video cutout instruction unit for instructing a partial video to be cut out from the stream video, and the partial video is cut out from the stream video based on an instruction from the video cutout instruction unit A video cutout unit, and a video display unit that displays the partial video cut out by the video cutout unit, wherein each video shooting unit is adjacent to a video shot by each video shooting unit The image capturing unit has an overlapping area that overlaps an image captured by the image capturing unit, and is arranged such that the size of the overlapping region is larger than the size of the partial image. At the timing when the identified video capturing unit coincides with the video acquisition unit identified from the identifier of the video capturing unit extracted by the video source ID extracting unit, information of the video capturing unit is obtained. It changes to the position of the cutout range associated with the information.

  In order to solve the above problem, a video distribution system according to the present invention is a video distribution system including a video acquisition device, a distribution server, and a video presentation device, and the video acquisition device includes a plurality of video shootings. The distribution server receives information on a video input unit that receives a plurality of videos taken by the plurality of video shooting units and a video shooting unit that captures a video range that the viewer desires to watch. A display instruction receiving unit, a video selection instructing unit for instructing a video to be selected from the plurality of videos based on information of the video photographing unit received by the display instruction receiving unit, and an instruction from the video selection instructing unit Based on the video selection, a video is selected from the plurality of videos to create one stream video, and when the selected video is switched, the video selection / switching is performed to superimpose an identifier indicating that the video is switched. And a video delivery unit that delivers the stream video created by the video selection / switching timing superposition unit to the video presentation device, wherein the video presentation device requests viewing from a viewer. A video range is received, a video shooting unit that captures the video range is specified, a display range specifying unit that specifies a cut-out range to be cut out from a video shot by the video shooting unit, and the display range specifying unit specified A display instruction transmission unit that transmits information of the video shooting unit to the distribution server, a video reception unit that receives the stream video distributed by the distribution server, and the stream video received by the video reception unit are superimposed on each other. A switching timing extracting unit that extracts the identifier indicating that the video has been switched, and the clipping specified by the display range specifying unit Based on the range information and the identifier information indicating that the video has been switched, which is extracted by the switching timing extraction unit, a video cutting instruction unit that instructs a partial video to be cut out from the stream video, and the video cutting instruction On the basis of the instruction of the section, a video cutout section that cuts out the partial video from the stream video, and a video display section that displays the partial video cut out by the video cutout section, There is an overlapping area where the video shot by each video shooting unit and the video shot by the video shooting unit arranged adjacent to each other overlap, and the size of the overlapping region is larger than the size of the partial video And the video cutout instructing unit includes a switching timing of a video shooting unit as a cutout source acquired from the display range specifying unit, and the cutout The switching timing extracting unit matches the switching timing of the video photographing unit and changes to the position of the extraction range associated with the information of the video photographing unit.

  In order to solve the above problem, a video distribution system according to the present invention is a video distribution system including a video acquisition device, a distribution server, and a video presentation device, and the video acquisition device includes a plurality of video shootings. The distribution server receives information on a video input unit that receives a plurality of videos taken by the plurality of video shooting units and a video shooting unit that captures a video range that the viewer desires to watch. A display instruction receiving unit, a video selection instructing unit for instructing a video to be selected from the plurality of videos based on information of the video photographing unit received by the display instruction receiving unit, and an instruction from the video selection instructing unit Based on the video selection, a video is selected from the plurality of videos to create one stream video, and when the selected video is switched, a video selection / section for inserting a delimited image indicating that the video has been switched is inserted. A video distribution unit that distributes the stream video created by the video selection / separation image insertion unit to the video presentation device, wherein the video presentation device requests viewing from a viewer. A video range is received, a video shooting unit that captures the video range is specified, a display range specifying unit that specifies a cut-out range to be cut out from a video shot by the video shooting unit, and the display range specifying unit specified A display instruction transmission unit that transmits information of the video photographing unit to the distribution server, a video reception unit that receives the stream video distributed by the distribution server, and the stream video received by the video reception unit. A delimiter image extraction unit that extracts a delimiter image indicating that the video has been switched, information on the cutout range specified by the display range designation unit, and the delimiter image Based on the segmented image extracted by the extraction unit, a video cutout instruction unit that instructs a partial video to be cut out from the stream video, and the partial video is cut out from the stream video based on an instruction from the video cutout instruction unit A video cutout unit, and a video display unit that displays the partial video cut out by the video cutout unit, wherein each video shooting unit is adjacent to a video shot by each video shooting unit The image capturing unit has an overlapping area that overlaps an image captured by the image capturing unit, and is arranged so that the size of the overlapping region is larger than the size of the partial image. The switching timing of the acquired video shooting unit that is the cut-out source is matched with the switching timing of the video shooting unit extracted by the segmented image extraction unit. Then, the position is changed to the position of the cutout range associated with the information of the video photographing unit.

  In order to solve the above problem, a video distribution method according to the present invention is a video distribution method in a video distribution system including a video acquisition device, a distribution server, and a video presentation device, and the video acquisition device includes: A plurality of video image capturing units, each video image capturing unit having an overlapping area where a video image captured by each video image capturing unit and a video image captured by an adjacent video image capturing unit are overlapped; Arranging the area so that the size of the area is larger than the size of the partial video displayed by the video presentation device; and receiving a plurality of videos taken by the plurality of video shooting units by the distribution server; A step of superimposing an identifier of the video shooting unit on the plurality of videos, and a video range desired to be viewed from a viewer by the video presentation device; Identifying a video photographing unit that captures the image, identifying a cutout range to be cut out from the video photographed by the video photographing unit, transmitting information of the identified video photographing unit to the distribution server, and From the plurality of videos on which identifiers are superimposed based on the information of the video shooting unit that is shooting the video range that the viewer desires to watch, and the information of the video shooting unit. Instructing a video to be selected, selecting a video from the plurality of videos superimposed with an identifier based on the instruction, creating one stream video, and sending the stream video to the video presentation device Distributing, receiving the stream video by the video presentation device, and the video superimposed on the stream video A step of extracting an identifier of a shadow portion, a step of designating a partial video to be cut out from the stream video based on the information on the specified cutout range and the information on the extracted identifier of the video shooting unit; The cut-out range associated with the information of the video shooting unit is extracted from the stream video at the timing when the video shooting unit that has been extracted matches the video acquisition unit specified by the extracted identifier of the video shooting unit. Cutting out the position, and displaying the cut out partial video.

  In order to solve the above problem, a video distribution method according to the present invention is a video distribution method in a video distribution system including a video acquisition device, a distribution server, and a video presentation device, and the video acquisition device includes: A plurality of video image capturing units, each video image capturing unit having an overlapping area where a video image captured by each video image capturing unit and a video image captured by an adjacent video image capturing unit are overlapped; Arranging the area so that the size of the area is larger than the size of the partial video displayed by the video presentation device; and receiving a plurality of videos taken by the plurality of video shooting units by the distribution server; The video presentation device accepts a video range desired to be viewed from a viewer, identifies a video shooting unit shooting the video range, and whether the video shot by the video shooting unit A step of specifying a cut-out range to be cut out; a step of transmitting information of the specified video shooting unit to the distribution server; and a video shooting of shooting the video range desired by a viewer by the distribution server Receiving information of a part, instructing a video to be selected from the plurality of videos based on the information of the video photographing unit, and selecting a video from the plurality of videos based on the instruction Creating one stream video and superimposing an identifier indicating that the video has been switched when the selected video is switched; delivering the stream video to the video presentation device; and the video presentation device To receive the stream video and indicate that the video superimposed on the stream video has been switched. Extracting the identifier; instructing a partial video to be cut out from the stream video based on the information on the identified cut-out range and the information on the identifier indicating that the extracted video has been switched; and The switching timing of the video capturing unit that is the cut-out source is matched with the switching timing of the extracted video capturing unit, and the position of the extraction range associated with the information of the video capturing unit is extracted from the stream video And a step of displaying the cut out partial video.

  According to the present invention, a plurality of viewers can simultaneously view a live video in different directions and reduce a delivery delay of the live video.

1 is a block diagram of a video distribution system according to a first embodiment of the present invention. It is a figure which shows the mode of the cutting-out instruction | indication of the image | video in the video delivery system which concerns on 1st Embodiment of this invention. It is a sequence diagram which shows operation | movement of the video delivery system which concerns on 1st Embodiment of this invention. It is a figure which shows the mode of the cutting-out instruction | indication of the image | video in the video delivery system which concerns on the modification of 1st Embodiment of this invention. It is a block diagram of the video delivery system which concerns on the modification of 1st Embodiment of this invention. It is a block diagram of the video delivery system which concerns on 2nd Embodiment of this invention. It is a figure which shows the mode of the cutting-out instruction | indication of the image | video in the video delivery system which concerns on 2nd Embodiment of this invention. It is a sequence diagram which shows operation | movement of the video delivery system which concerns on 2nd Embodiment of this invention. It is a figure which shows the mode of the cutting-out instruction | indication of the image | video in the video delivery system which concerns on the modification of 2nd Embodiment of this invention. It is a block diagram of the video delivery system which concerns on 3rd Embodiment of this invention. It is a figure which shows the mode of the cutting-out instruction | indication of the image | video in the video delivery system which concerns on 3rd Embodiment of this invention. It is a block diagram of the video delivery system without the block which superimposes and extracts an identifier. It is a figure which shows the mode of the image cut-out when a timing shift does not occur. It is a figure which shows the mode of the cutting-out instruction | indication of the image | video when a problem arises by image | video cutting-out. It is a figure which shows the mode of the image | video cutting-out when a timing shift has occurred.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram of a video distribution system according to the first embodiment of the present invention. The video distribution system according to the first embodiment of the present invention includes a video acquisition device 110, a distribution server 120, and a video presentation device 130. In addition, although the structure provided with one image | video presentation apparatus is shown in FIG. 1, this is an example and two or more image | video presentation apparatuses may be sufficient.

  The video acquisition device 110 includes a video shooting unit 111 (111a, 111b).

  The video imaging unit 111 captures a video and transmits the captured video to the distribution server 120. The video shooting unit 111 has an overlapping area where the video shot by the video shooting unit 111a and the video shot by the video shooting unit 111b arranged adjacent to the video shooting unit 111a overlap, and the size of the overlapping area is large. It arrange | positions so that it may become larger than the magnitude | size of the partial video displayed on the video presentation apparatus 130. FIG. Note that FIG. 1 shows a case where the video photographing unit 111 is composed of two video photographing units 111a and 111b, but this is an example, and the video photographing unit 111 is composed of three or more. Also good. The video photographing unit 111 is, for example, a camera. In the present application, the case where the video photographing unit 111 is a camera will be described as an example as necessary.

  The distribution server 120 includes a display instruction receiving unit 121, a video selection instruction unit 122, a video input unit 123 (123a, 123b), a video source ID superimposing unit 124 (124a, 124b), a video selection unit 125, and a video distribution unit 126. .

  The display instruction receiving unit 121 receives, from the video presentation device 130, information on the video shooting unit 111 that is shooting a video range that the viewer desires to view.

  Based on the information of the video photographing unit 111 received by the display instruction receiving unit 121 from the video presentation device 130, the video selection instructing unit 122 sends the video source (video photographing unit 111) to the video selecting unit 125 by the video source ID superimposing unit 124. ) To designate a video to be selected from a plurality of videos on which identifiers are superimposed.

  The video input unit 123 receives the video shot by the video shooting unit 111. FIG. 1 shows an example in which the video input unit 123 includes two video input units 123a and 123b, and the video shooting unit 111 includes two video shooting units 111a and 111b. The video input units 123a and 123b receive the videos shot by the video shooting units 111a and 111b, respectively.

  The video source ID superimposing unit 124 receives video from the video input unit 123 and superimposes an identifier (ID) associated with the video photographing unit 111 for each video source as an image watermark. The identifier is, for example, a camera ID. FIG. 1 illustrates an example in which the video source ID superimposing unit 124 includes two video source ID superimposing units 124a and 124b. The video source ID superimposing units 124a and 124b superimpose identifiers on the video received from the video input units 123a and 123b, respectively.

  Based on an instruction from the video selection instruction unit 122, the video selection unit 125 selects a necessary video from the video on which the identifier is superimposed for each video source by the video source ID superimposing unit 124, and selects one continuous stream video. create.

  The video delivery unit 126 delivers the stream video created by the video selection unit 125 to the video presentation device 130.

  The video presentation device 130 includes a display range designation unit 131, a display instruction transmission unit 132, a video reception unit 133, a video source ID extraction unit 134, a video cutout instruction unit 135, a video cutout unit 136, and a video display unit 137.

  The display range designation unit 131 receives a request from the viewer as to which video range is desired to be viewed. The display range designating unit 131 can accept a display range desired by the viewer by, for example, input via a keyboard, a remote control, a touch panel, or the like. In addition, for example, the display range specifying unit 131 includes an acceleration sensor, an orientation sensor, and the like, and the display range desired by the viewer is determined based on sensor values that these sensors acquire as needed depending on the direction in which the video presentation device 130 is directed. Can be accepted.

  In addition, the display range specifying unit 131 specifies the video shooting unit 111 that is shooting the video range that the viewer desires to watch, and specifies the cutout range to be cut out from the video shot by the specified video shooting unit 111 To do.

  The display instruction transmission unit 132 transmits the information of the video photographing unit 111 specified by the display range specification unit 131 to the distribution server 120.

  The video receiving unit 133 receives the stream video distributed from the distribution server 120.

  The video source ID extraction unit 134 extracts a video source identifier superimposed as image watermark information from the stream video received by the video reception unit 133.

  The video cutout instruction unit 135 compares the cutout range information specified by the display range specifying unit 131 with the video source identifier extracted by the video source ID extraction unit 134 and instructs the video cutout unit 136 to cut out. . The video cutout instruction unit 135 is a timing at which the video shooting unit 111 specified by the display range specifying unit 131 matches the video shooting unit 111 specified from the identifier of the video shooting unit 111 extracted by the video source ID extraction unit 134. And instructing to change to the position of the cut-out range associated with the information of the video photographing unit 111.

  The video cutout unit 136 is a partial video obtained by cutting out a part necessary for displaying a video according to a viewer's request from the video selected by the video selection unit 125 based on an instruction from the video cutout instruction unit 135. Cut out.

  The video display unit 137 displays the partial video clipped by the video cutout unit 136.

  The video distribution system according to the present invention includes a video source ID superimposing unit 124 and a video source ID extracting unit 134, and the video cutout instruction unit 135 extracts information on the cutout range specified by the display range specifying unit 131 and the video source ID extraction. By collating the identifier of the video source extracted by the unit 134 and instructing the video cutout unit 136 to cut out, the video can be cut out at an appropriate timing.

  Hereinafter, problems that may occur when the video source ID superimposing unit 124 and the video source ID extracting unit 134 are not provided will be described. FIG. 12 is a block diagram of the video distribution system when the video source ID superimposing unit 124 and the video source ID extracting unit 134 are not provided.

  As a premise of the description, the video shooting unit 511 is two cameras that shoot with a pixel number of 800 × 600 pixels, and the video shot by each camera is arranged so as to overlap by 300 pixels in the horizontal direction. It shall be. The video displayed by the video presentation device 530 is assumed to be in a range of 300 × 600 pixels. In this case, the display range designation unit 531 instructs to sequentially display the entire imaging range from the left end to the right end while changing the display position.

  FIG. 13 is a diagram illustrating a state of video cut-out when there is no timing shift problem. In the case of sequentially displaying the entire imaging range from the left end to the right end while changing the display position, when the display position is shifted by 50 pixels for each frame and the display position is shifted by 50 pixels for each frame, the distribution server 520 has 1-11. A stream video in which video 1 is selected up to the frame and video 2 is selected up to the 12th to 21st frames is created, and the created stream video is transmitted. In the video presentation device 530, the first frame cuts out the range of 0 to 300 pixels in the horizontal direction of the video 1, and the second frame sequentially cuts out the range of 50 to 350 pixels in the horizontal direction of the video 1. Moving, the range of 500 to 800 pixels in the horizontal direction of image 1 is cut out at the eleventh frame. Subsequently, in the 12th frame, the range of 50 to 350 pixels in the horizontal direction of the video 2 is cut out and displayed. Thus, by displaying while changing the cutout position, it is possible to present an image that can be seen by moving the display position smoothly.

  However, the display range designation unit 531 of the video presentation device 530 determines the video selection instruction to the video selection instruction unit 522 in the distribution server 520 and the cut-out position to the video cut-out instruction unit 535 in the video presentation device 530. In the case of performing an instruction, there is a delay in video transmission from the distribution server 520 to the video presentation device 530 at the time of video selection in the distribution server 520. Is asynchronous data. If the video from the same video source is being sent, no major problem will occur, but at the timing of switching the video, the video source of the video received by the video presentation device 530 is still due to the video transmission delay. There is a possibility that the position to cut out may be switched even though it has not been switched.

  With reference to FIG. 14, how such a timing shift occurs will be described. In the display range designation unit 531 of the video presentation device 530, when a scroll operation extending from the range of the camera 1 to the range of the camera 2 is executed at the time indicated by the black triangle, the video presentation device 530 displays the selected video as the video of the camera 1. The distribution server 520 instructs the distribution server 520 to change from the video of the camera 1 to the video of the camera 2. When the distribution server 520 changes the selected video, the video received by the video presentation device 530 is switched from the video of the camera 1 to the video of the camera 2, but the video received by the video presentation device 530 due to a video transmission delay or the like. Is switched to the video of the camera 2 with a slight delay from the time indicated by the black triangle. On the other hand, at the time indicated by the black triangle, the video cutout instruction unit 535 of the video presentation device 530 has instructed the cutout position corresponding to the video of the camera 2. For this reason, in the section 600 indicated by diagonal lines, although the display video is the video of the camera 1, a timing shift occurs in which the video is cut out at the cut-out position corresponding to the video of the camera 2.

  FIG. 15 shows how the video is cut out when a timing shift occurs. Referring to the twelfth frame, the video presentation device 530 is still receiving the video 1 even though it wants to cut out and display the range of 50 to 350 pixels of the video 2. The range is cut out and displayed.

  When such an event occurs, the video that was displayed while moving sequentially from left to right in the entire video suddenly switches to the video on the left of video 1 as soon as it reaches the right edge of video 1, and then This means that the video from the left side of the video 2 is displayed sequentially in the original continuation, and the problem is that the video is not connected smoothly but a distorted video is displayed.

  Therefore, the video distribution system according to the present invention includes the video source ID superimposing unit 124 and the video source ID extracting unit 134, and the video cutout instruction unit 135 includes information on the cutout range specified by the display range specifying unit 131 and the video source. By collating the identifier of the video source extracted by the ID extraction unit 134 and instructing the video cutout unit 136 to cut out the video, the video can be cut out at an appropriate timing. It is possible to suppress and display an appropriate video as shown in FIG.

  FIG. 2 is a diagram showing a video cut instruction in the video distribution system according to the first embodiment of the present invention.

  In the display range designation unit 131 of the video presentation device 130, when a scroll operation extending from the range of the camera 1 to the range of the camera 2 is executed at a point indicated by a black triangle, the video presentation device 130 displays the selected video as the video of the camera 1. The distribution server 120 is instructed to change from the video of the camera 1 to the video of the camera 2, and the distribution server 120 changes the selected video from the video of the camera 1 to the video of the camera 2. When the distribution server 120 changes the selected video, the video received by the video presentation device 130 is switched from the video of the camera 1 to the video of the camera 2, but the video received by the video presentation device 130 due to a video transmission delay or the like. Is switched to the video of the camera 2 with a slight delay from the time indicated by the black triangle. On the other hand, the ID of the camera 1 and the ID of the camera 2 are superimposed on the video of the camera 1 and the video of the camera 2 received by the video presentation device 130, respectively. Since the video cutout instruction unit 135 instructs the change of the cutout position at the timing when the change of the camera ID is detected, even if there is a delay from the time indicated by the black triangle in the video switchover timing, the video cutout timing and the video are displayed. There is no deviation from the timing to cut out.

  Next, the operation of the video distribution system according to the first embodiment of the present invention will be described with reference to the sequence diagram shown in FIG.

  The video capturing unit 111 of the video acquisition device 110 always captures video (S101). The video imaging unit 111 constantly transmits the captured video to the distribution server 120 (S102).

  The video source ID superimposing unit 124 of the distribution server 120 superimposes an identifier (ID) as an image watermark for each video source received from the video acquisition device 110 (S103).

  On the other hand, the display range designation unit 131 of the video presentation device 130 receives a request from a viewer as to which video range is desired to be viewed. In addition, the display range specifying unit 131 specifies the video shooting unit 111 that is shooting the video range that the viewer desires to watch, and specifies the cutout range to be cut out from the video shot by the specified video shooting unit 111 (S104).

  The display instruction transmission unit 132 transmits the information of the video source that is the clipping source specified by the display range specification unit 131 to the distribution server 120 (S105).

  The video selection instruction unit 122 of the distribution server 120 selects the video selection unit 125 from the plurality of videos received by the video input unit 123 based on the information on the video source received by the display instruction reception unit 121 from the video presentation device 130. Instruct the video to be. The video selection unit 125 selects a video based on an instruction from the video selection instruction unit 122 from a plurality of videos on which the video source ID superimposing unit 124 superimposes the video source identifier information, and one continuous stream video Is created (S106).

  The video delivery unit 126 delivers the stream video created by the video selection unit 125 to the video presentation device 130 (S107).

  The video receiving unit 133 of the video presentation device 130 receives the video distributed from the distribution server 120 (S108).

  The video source ID extraction unit 134 extracts the identifier of the video source superimposed as an image watermark in the stream video received by the video reception unit 133 (S109).

  The video cutout instruction unit 135 includes information on the cutout range specified by the display range designation unit 131 in step S104, and the video source identifier of the currently arrived video extracted by the video source ID extraction unit 134 in step S109. And instructing the video cutout unit 136 to cut out at an appropriate timing for cutting out from the correct video source. Based on an instruction from the video cutout instruction unit 135, the video cutout unit 136 extracts a partial video obtained by cutting out a video necessary for displaying a video according to a viewer's request from the video received by the video reception unit 133. Cut out (S110).

  The video display unit 137 displays the partial video clipped by the video cutout unit 136 (S111).

(Modification of the first embodiment)
In the first embodiment, in the distribution server 120, before the video selection unit 125 selects a video, the video source ID superimposing unit 124 superimposes the video source identifier on each video as an image watermark in the video. Although an example in which the identifier is performed is shown, the timing at which the identifier is superimposed on the video is not limited to this. For example, in the video acquisition device 110, an identifier may be superimposed on the video acquired by the video shooting unit 111 and then transmitted to the distribution server 120. Alternatively, in the distribution server 120, the video selection unit 125 selects the video. Thus, an identifier may be superimposed when creating one stream video.

  In the first embodiment, the cutout position is instructed in the video presentation device 130, but the cutout position is instructed from the distribution server 120 to the video presentation device 130 as information that is not synchronized with the stream video. May be performed. Even in this case, it is possible to match the instruction of the cutout position and the cutout timing of the stream video by the same method.

  In the first embodiment, the method in which the video source ID superimposing unit 124 superimposes the identifier as the image watermark has been described. However, as shown in FIG. 4, the identifier is used as another field synchronized with the video of the stream data. It may be given.

  In the example illustrated in FIG. 4, when a scroll operation that extends from the range of the camera 1 to the range of the camera 2 is executed in the display range designation unit 131 of the video presentation device 130, the video presentation device 130 The distribution server 120 is instructed to change the selected video from the camera 1 video to the camera 2 video, and the distribution server 120 changes the selected video from the camera 1 video to the camera 2 video. When the distribution server 120 changes the selected video, the video received by the video presentation device 130 is switched from the video of the camera 1 to the video of the camera 2, but the video received by the video presentation device 130 due to a video transmission delay or the like. Is switched to the video of the camera 2 with a slight delay from the time indicated by the black triangle. On the other hand, the video of the camera 1 and the video of the camera 2 received by the video presentation device 130 are superimposed with the ID of the camera 1 and the ID of the camera 2 in different fields in the stream, respectively. Since the video cutout instruction unit 135 instructs the change of the cutout position at the timing when the change of the camera ID is detected, even if there is a delay from the time indicated by the black triangle in the video switchover timing, the video cutout timing and the video are displayed. There is no deviation from the timing to cut out.

  Further, as in the block configuration of the video distribution system shown in FIG. 5, the video encoding units (162, 176) that perform video encoding are further added to the block configuration of the first embodiment as necessary. The video decoding unit (174, 186) for decoding the video may be provided.

(Second Embodiment)
FIG. 6 is a block diagram of a video distribution system according to the second embodiment of the present invention. The video distribution system according to the second embodiment of the present invention includes a video acquisition device 210, a distribution server 220, and a video presentation device 230. In the first embodiment, the video source identifier is always assigned to the video, whereas in the second embodiment, an identifier indicating that the video is switched is added at the timing when the video is switched. In addition, in FIG. 6, although the structure provided with one video presentation apparatus is shown, this is an example and two or more video presentation apparatuses may be sufficient.

  The video acquisition device 210 includes a video shooting unit 211 (211a, 211b).

  The video capturing unit 211 captures a video and transmits the captured video to the distribution server 220. The video shooting unit 211 has an overlapping area where the video shot by the video shooting unit 211a and the video shot by the video shooting unit 211b arranged adjacent to the video shooting unit 211a overlap, and the size of the overlapping area is large. It arrange | positions so that it may become larger than the magnitude | size of the partial image | video displayed with the image | video presentation apparatus 230. FIG. FIG. 6 shows a case where the video photographing unit 211 is composed of two video photographing units 211a and 211b, but this is an example, and the video photographing unit 211 is composed of three or more. Also good. The video photographing unit 211 is, for example, a camera.

  The distribution server 220 includes a display instruction receiving unit 221, a video selection instruction unit 222, video input units 223 (223a and 223b), a video selection / switching timing superimposing unit 224, and a video distribution unit 225.

  The display instruction receiving unit 221 receives from the video presentation device 230 information on the video shooting unit 211 that is shooting a video range that the viewer desires to watch.

  The video selection instructing unit 222 includes a plurality of videos received by the video input unit 223 in the video selection / switching timing superimposing unit 224 based on the information of the video shooting unit 211 received by the display instruction receiving unit 221 from the video presentation device 230. Instruct the video to be selected from.

  The video input unit 223 receives the video shot by the video shooting unit 211. FIG. 6 shows an example in which the video input unit 223 includes two video input units 223a and 223b, and the video shooting unit 211 includes two video shooting units 211a and 211b. The video input units 223a and 223b receive the videos shot by the video shooting units 211a and 211b, respectively.

  The video selection / switching timing superimposing unit 224 selects a required video from a plurality of videos input to the video input unit 223 based on an instruction from the video selection instructing unit 222, and the first frame in which the video source is switched. In addition, an identifier indicating that the video source has been switched is superimposed by an image watermark, and one continuous stream video is created from the video.

  The video delivery unit 225 delivers the stream video created by the video selection / switching timing superimposing unit 224 to the video presentation device 230.

  The video presentation device 230 includes a display range designation unit 231, a display instruction transmission unit 232, a video reception unit 233, a switching timing extraction unit 234, a video cutout instruction unit 235, a video cutout unit 236, and a video display unit 237.

  The display range designation unit 231 receives a request from a viewer as to which video range is desired to be viewed. The display range designating unit 231 can accept a display range desired by the viewer by, for example, input via a keyboard, a remote control, a touch panel, or the like. In addition, for example, the display range specifying unit 231 includes an acceleration sensor, an orientation sensor, and the like, and the display range desired by the viewer is determined based on sensor values that these sensors acquire as needed depending on the direction in which the video presentation device 230 is directed. Can be accepted.

  In addition, the display range specifying unit 231 specifies the video shooting unit 211 that is shooting the video range that the viewer desires to watch, and specifies the cutout range to be cut out from the video shot by the specified video shooting unit 211 To do.

  The display instruction transmission unit 232 transmits the information of the video photographing unit 211 specified by the display range specification unit 231 to the distribution server 220.

  The video receiving unit 233 receives the stream video distributed from the distribution server 220.

  The switching timing extraction unit 234 extracts an identifier indicating the switching timing of the video source superimposed as the image watermark information from the stream video received by the video reception unit 233.

  The video cutout instruction unit 235 compares the cutout range information specified by the display range specifying unit 231 with the identifier indicating the video source switching timing extracted by the switching timing extraction unit 234 and cuts out the video cutout unit 236. Give instructions. The video cutout instruction unit 235 matches the switching timing of the video shooting unit 211 as the cutout source acquired from the display range specifying unit 231 with the switching timing of the video shooting unit 211 extracted by the switching timing extraction unit 234, An instruction to change to the position of the cutout range associated with the information of the video photographing unit 211 is given.

  Based on an instruction from the video cutout instruction unit 235, the video cutout unit 236 cuts out a partial video obtained by cutting out a part necessary for displaying a video according to the viewer's request from the video received by the video reception unit 233. cut.

  The video display unit 237 displays the partial video clipped by the video cutout unit 236.

  FIG. 7 is a diagram showing a state of an instruction to cut out a video in the video distribution system according to the second embodiment of the present invention.

  In the display range specifying unit 231 of the video presentation device 230, when a scroll operation extending from the range of the camera 1 to the range of the camera 2 is executed at a point indicated by a black triangle, the video presentation device 230 displays the selected video as the video of the camera 1. The distribution server 220 is instructed to change from the video of the camera 1 to the video of the camera 2, and the distribution server 220 changes the selected video from the video of the camera 1 to the video of the camera 2. When the distribution server 220 changes the selected video, the video received by the video presentation device 230 is switched from the video of the camera 1 to the video of the camera 2, but the video received by the video presentation device 230 due to a delay in video transmission or the like. Is switched to the video of the camera 2 with a slight delay from the time indicated by the black triangle. On the other hand, in the video of the camera 1 and the video of the camera 2 received by the video presentation device 230, an identifier indicating the switching of the video is superimposed on the first frame where the video is switched. Since the video cutout instruction unit 235 instructs to change the cutout position at the timing when the identifier indicating the video change is detected, even if there is a delay from the time indicated by the black triangle in the video changeover timing, There is no deviation from the timing to cut out the video.

  In this way, the video cutout instruction unit 235 monitors the camera change identifier in the video extracted by the switching timing extraction unit 234, and at the appropriate timing, that is, at the timing when the camera change identifier is detected, the video cutout unit 236. Instruct to cut out. Thereby, the skip of the image as shown in FIG. 15 can be suppressed, and an appropriate image as shown in FIG. 13 can be presented.

  Next, the operation of the video distribution system according to the second embodiment of the present invention will be described with reference to the sequence diagram shown in FIG.

  The video capturing unit 211 of the video acquisition device 210 constantly captures video (S201). The video imaging unit 211 constantly transmits the captured video to the distribution server 220 (S202).

  On the other hand, the display range designation unit 231 of the video presentation device 230 receives a request from the viewer as to which video range is desired to be viewed. In addition, the display range specifying unit 231 specifies the video shooting unit 211 that is shooting the video range that the viewer desires to watch, and specifies the cutout range to be cut out from the video shot by the specified video shooting unit 211 (S203).

  The display instruction transmission unit 232 transmits the information of the video source that is the clipping source specified by the display range specification unit 231 to the distribution server 220 (S204).

  The video selection instructing unit 222 of the distribution server 220 includes a plurality of video input unit 223 received by the video selection / switching timing superimposing unit 224 based on the video source information received by the display instruction receiving unit 221 from the video presentation device 230. Instruct the video to be selected from the video. The video selection / switching timing superimposing unit 224 selects a video from a plurality of videos input to the video input unit 223 based on an instruction from the video selection instruction unit 222, and creates one continuous stream video. At this time, the video selection / switching timing superimposing unit 224 superimposes an identifier indicating that the video source is switched on the first frame immediately after the video source is switched (S206).

  The video delivery unit 225 delivers the stream video created by the video selection / switching timing superimposing unit 224 to the video presentation device 230 (S207).

  The video receiver 233 of the video presentation device 230 receives the video distributed from the distribution server 220 (S208).

  The switching timing extraction unit 234 extracts an identifier indicating the switching timing of the video source superimposed as an image watermark in the stream video (S209).

  The video cutout instruction unit 235 obtains a video at an appropriate timing from the information on the cutout range specified by the display range specifying unit 231 in step S203 and the video source switching timing extracted by the switching timing extraction unit 234 in step S209. A cutout instruction is given to the cutout unit 236. Based on the instruction from the video cutout instruction unit 235, the video cutout unit 236 cuts out a partial video obtained by cutting out the video necessary for displaying the video according to the viewer's request from the video received by the video reception unit 233. Cut out (S210).

  The video display unit 237 displays the partial video clipped by the video cutout unit 236 (S211).

(Modification of the second embodiment)
In the second embodiment, the identifier indicating the switching timing of the video source is superimposed immediately after the switching of the video source. However, the identifier indicating the video source similar to the first embodiment is displayed in the video source. You may make it superimpose only immediately after switching.

  In the second embodiment, the video selection / switching timing superimposing unit 224 has described the method of superimposing the switching timing of the video source as an image watermark. However, as shown in FIG. An identifier may be given as a separate field.

  In the example illustrated in FIG. 9, when a scroll operation that extends from the range of the camera 1 to the range of the camera 2 is executed in the display range designation unit 231 of the video presentation device 230 at a time indicated by a black triangle, the video presentation device 230 The distribution server 220 is instructed to change the selected video from the camera 1 video to the camera 2 video, and the distribution server 220 changes the selected video from the camera 1 video to the camera 2 video. When the distribution server 220 changes the selected video, the video received by the video presentation device 230 is switched from the video of the camera 1 to the video of the camera 2, but the video received by the video presentation device 230 due to a delay in video transmission or the like. Is switched to the video of the camera 2 with a slight delay from the time indicated by the black triangle. On the other hand, in the video of the camera 1 and the video of the camera 2 received by the video presentation device 230, an identifier indicating video switching is superimposed on another field in the stream at the timing of the first frame when the video is switched. Since the video cutout instruction unit 235 instructs to change the cutout position at the timing when the identifier indicating the video change is detected, even if there is a delay from the time indicated by the black triangle in the video changeover timing, There is no deviation from the timing to cut out the video.

  In the second embodiment, there may occur a case where the switching timing of the video source cannot be read from the video. In such a case, in order not to continue the situation where the cutout position cannot be changed indefinitely, when a predetermined time or more has elapsed after receiving the notification that the cutout video is changed from the display range specifying unit 231, the video cutout unit 236 The processing may be advanced as if the video source switching timing was overlooked.

(Third embodiment)
FIG. 10 is a block diagram of a video distribution system according to the third embodiment of the present invention. The video distribution system according to the third embodiment of the present invention includes a video acquisition device 310, a distribution server 320, and a video presentation device 330. In the second embodiment, immediately after the video source is switched, an identifier indicating the switching is superimposed on the video. However, in the third embodiment, one frame of a delimited image is inserted in the video, and the timing of switching the video source is set. The point of notification is different. In the third embodiment, video encoding and decoding are performed. In addition, in FIG. 10, although the structure provided with one video presentation apparatus is shown, this is an example and two or more video presentation apparatuses may be sufficient.

  The video acquisition device 310 includes a video shooting unit 311 (311a, 311b) and a video encoding unit 312 (312a, 312b).

  The video imaging unit 311 captures video and provides the captured video to the video encoding unit 312. The video shooting unit 311 has an overlapping area where the video shot by the video shooting unit 311a overlaps with the video shot by the video shooting unit 311b arranged adjacent to the video shooting unit 311a. It arrange | positions so that it may become larger than the magnitude | size of the partial video displayed on the video presentation apparatus 330. FIG. FIG. 10 shows a case where the video shooting unit 311 includes two video shooting units 311a and 311b. However, this is an example, and the video shooting unit 311 includes three or more video shooting units. Also good. The video photographing unit 311 is, for example, a camera.

  The video encoding unit 312 encodes the video captured by the video capturing unit 311 and transmits the encoded video to the distribution server 320.

  The distribution server 320 includes a display instruction receiving unit 321, a video selection instruction unit 322, video input units 323 (323 a and 323 b), a video selection / separated image insertion unit 324, and a video distribution unit 325.

  The display instruction receiving unit 321 receives from the video presentation device 330 information on the video shooting unit 311 that is shooting a video range that the viewer desires to watch.

  The video selection instructing unit 322 includes a plurality of videos received by the video input unit 323 in the video selection / separated image insertion unit 324 based on the information of the video shooting unit 311 received by the display instruction receiving unit 321 from the video presentation device 330. Instruct the video to be selected from.

  The video input unit 323 receives video captured by the video capturing unit 311 and encoded by the video encoding unit 312. FIG. 10 shows an example in which the video input unit 323 includes two video input units 323a and 323b, and the video shooting unit 311 includes two video shooting units 311a and 311b. The video input units 323a and 323b respectively receive video images captured by the video image capturing units 311a and 311b and encoded by the video encoding units 312a and 312b.

  The video selection / separation image insertion unit 324 selects a required video from the video input to the video input unit 323 based on an instruction from the video selection instruction unit 322, and the video source is switched when the video source is switched. One frame of a delimited image indicating the switching is inserted, and one continuous stream video is created.

  The video delivery unit 325 delivers the stream video created by the video selection / separation image insertion unit 324 to the video presentation device 330.

  The video presentation device 330 includes a display range designation unit 331, a display instruction transmission unit 332, a video reception unit 333, a separator image extraction unit 334, a video cutout instruction unit 335, a video decoding unit 336, a video cutout unit 337, and a video display unit 338. Prepare.

  The display range designating unit 331 receives a request as to which video range is desired to be viewed from the viewer. The display range designating unit 331 can accept the display range desired by the viewer by, for example, input via a keyboard, a remote control, a touch panel, or the like. In addition, for example, the display range specifying unit 331 includes an acceleration sensor, an orientation sensor, and the like, and a display range desired by the viewer based on sensor values that these sensors acquire as needed depending on the direction in which the video presentation device 330 is directed. Can be accepted.

  In addition, the display range specifying unit 331 specifies the video capturing unit 311 that captures the video range that the viewer desires to watch, and specifies the cutout range to be cut out from the video captured by the specified video capturing unit 311. To do.

  The display instruction transmission unit 332 transmits the information of the video photographing unit 311 specified by the display range specification unit 331 to the distribution server 320.

  The video receiving unit 333 receives the stream video distributed from the distribution server 320.

  The delimiter image extraction unit 334 extracts the delimiter image inserted when the video source is switched from the stream video received by the video reception unit 333.

  The video cutout instruction unit 335 obtains the timing information at which the video source is switched from the information on the cutout range specified by the display range specifying unit 331 and the segmented image extracted by the segmented image extraction unit 334, and compares it with the video segmentation. A cutout instruction is given to the unit 337. The video cutout instruction unit 335 matches the switching timing of the video shooting unit 311 that is the cutout source acquired from the display range specifying unit 331 with the switching timing of the video shooting unit 311 extracted by the segmented image extraction unit 334, An instruction to change to the position of the cutout range associated with the information of the video photographing unit 311 is given.

  The video decoding unit 336 decodes the encoded video received by the video receiving unit 333.

  The video cutout unit 337 is necessary for displaying a video according to the viewer's request from the video received by the video reception unit 333 and decoded by the video decoding unit 336 based on an instruction from the video cutout instruction unit 335. A partial image obtained by cutting out an important part is cut out.

  The video display unit 338 displays the partial video clipped by the video cutout unit 337.

  FIG. 11 is a diagram showing a state of a video cut instruction in the video distribution system according to the third embodiment of the present invention.

  In the display range designation unit 331 of the video presentation device 330, when a scroll operation extending from the range of the camera 1 to the range of the camera 2 is executed at the time indicated by the black triangle, the video presentation device 330 displays the selected video as the video of the camera 1. The distribution server 320 is instructed to change from the video of the camera 1 to the video of the camera 2, and the distribution server 320 changes the selected video from the video of the camera 1 to the video of the camera 2. When the distribution server 320 changes the selected video, the video received by the video presentation device 330 is switched from the video of the camera 1 to the video of the camera 2, but the video received by the video presentation device 330 due to a delay in video transmission or the like. Is switched to the video of the camera 2 with a slight delay from the time indicated by the black triangle. On the other hand, in the video of the camera 1 and the video of the camera 2 received by the video presentation device 330, the entire black video is inserted in the first frame where the video is switched. Since the video cutout instruction unit 335 instructs the change of the cutout position at the timing when the black image of the entire surface is detected, even if there is a delay from the time indicated by the black triangle in the video switch timing, the video cutout timing and the video are displayed. There is no deviation from the timing to cut out.

  As shown in FIG. 11, for example, an image whose entire surface is black can be used as the separator image. For example, in the case of the MPEG-2 system, which is often used as an encoding method at the time of live video distribution, both an intra-frame encoded image and an inter-frame encoded image are used. After one frame is inserted, the video of the next video source is arranged from the intra-frame encoded image. Since an image whose entire surface is black can be expected to have the smallest amount of data when encoded, the effect on transmission time is small. In addition, when the delimiter image is extracted by the delimiter image extraction unit 334, it can be extracted at high speed only by looking at the data size of the intra-frame encoded image even in the encoded state. In addition, although it looks black for a moment, it seems that there is little psychological influence.

  In addition, although the case where an image whose entire surface is black is used has been described as an example, the present invention is not limited to this, and it is possible to immediately determine that the image is an identifier by looking at only one image. Even if it is an image and one such image is inserted in the middle of the video, any image may be used as long as it does not cause a sense of discomfort. If detection of the image is difficult as it is with the encoded video information, detection may be performed from the decoded image.

  As described above, according to the video distribution system according to the present invention, the video acquisition device includes a plurality of video shooting units and shoots a wide area, so that a plurality of viewers can simultaneously have a desired direction. You can watch live video.

  In addition, in the video presentation device, the timing at which the video source to be displayed is switched and the timing at which the cut-out position in the video to be displayed is changed can be matched, thereby providing the viewer with a continuous and uncomfortable video. be able to.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention.

110, 160, 210, 310 Video acquisition device 111, 161, 211, 311 Video shooting unit 120, 170, 220, 320 Distribution server 121, 171, 221, 321 Display instruction receiving unit 122, 172, 222, 322 Video selection instruction Unit 123, 173, 223, 323 Video input unit 124, 175 Video source ID superimposing unit 125, 177 Video selection unit 126, 178, 225, 325 Video distribution unit 130, 180, 230, 330 Video presentation device 131, 181, 231 331 Display range designation unit 132, 182, 232, 332 Display instruction transmission unit 133, 185, 233, 333 Video reception unit 134, 184 Video source ID extraction unit 135, 183, 235, 335 Video extraction instruction unit 136, 187, 236, 337 Image cutout part 13 188, 237, 338 Video display unit 162, 176, 312 Video encoding unit 174, 186, 336 Video decoding unit 224 Video selection / switching timing superimposing unit 234 Switching timing extraction unit 324 Video selection / delimited image insertion unit 334 Delimited image Extraction unit

Claims (8)

A video distribution system comprising a video acquisition device, a distribution server, and a video presentation device,
The video acquisition device includes a plurality of video shooting units,
The distribution server
A video input unit for receiving a plurality of videos taken by the plurality of video shooting units;
A video source ID superimposing unit that superimposes an identifier of the video photographing unit on the plurality of videos;
A display instruction receiving unit that receives information of a video shooting unit shooting a video range that the viewer desires to watch;
A video selection instruction unit for instructing a video to be selected from the plurality of videos on which an identifier is superimposed based on the information of the video photographing unit received by the display instruction receiving unit;
Based on an instruction from the video selection instruction unit, a video selection unit that selects a video from the plurality of videos on which an identifier is superimposed, and creates one stream video;
A video delivery unit that delivers the stream video created by the video selection unit to the video presentation device;
The video presentation device includes:
A display range designating unit that accepts the video range desired to be viewed from a viewer, identifies a video shooting unit that has shot the video range, and specifies a cut-out range to be cut out from the video shot by the video shooting unit;
A display instruction transmission unit that transmits information of the video photographing unit specified by the display range designation unit to the distribution server;
A video receiver for receiving the stream video distributed by the distribution server;
A video source ID extracting unit for extracting an identifier of the video photographing unit superimposed on the stream video received by the video receiving unit;
A video cut-out instruction that designates a partial video to be cut out from the stream video based on the information on the cut-out range specified by the display range designation unit and the information on the identifier of the video shooting unit extracted by the video source ID extraction unit And
Based on an instruction from the video cutout instruction unit, a video cutout unit that cuts out the partial video from the stream video;
A video display unit for displaying the partial video clipped by the video cutout unit;
Each of the video shooting units has an overlapping area where a video shot by each of the video shooting units and a video shot by a video shooting unit arranged adjacent to each other overlap, and the size of the overlapping area is the portion It is arranged to be larger than the size of the image,
The video cutout instructing unit is configured so that the video capturing unit specified by the display range specifying unit and the video acquisition unit specified from the identifier of the video capturing unit extracted by the video source ID extracting unit coincide with each other. A video distribution system characterized by changing to a position of a cutout range associated with information of a photographing unit.   2. The video distribution system according to claim 1, wherein the video source ID superimposing unit superimposes the identifier of the video capturing unit as an image watermark, or sets the identifier of the video capturing unit in a field other than the video being streamed. A video distribution system characterized by superimposing. A video distribution system comprising a video acquisition device, a distribution server, and a video presentation device,
The video acquisition device includes a plurality of video shooting units,
The distribution server
A video input unit for receiving a plurality of videos taken by the plurality of video shooting units;
A display instruction receiving unit that receives information of a video shooting unit shooting a video range that the viewer desires to watch;
A video selection instruction unit for instructing a video to be selected from the plurality of videos based on the information of the video photographing unit received by the display instruction receiving unit;
Based on an instruction from the video selection instruction unit, a video is selected from the plurality of videos to create one stream video, and when the selected video is switched, an identifier indicating that the video has been switched is superimposed. Video selection / switching timing superimposition unit,
A video delivery unit that delivers the stream video created by the video selection / switching timing superimposition unit to the video presentation device;
The video presentation device includes:
A display range designating unit that accepts the video range desired to be viewed from a viewer, identifies a video shooting unit that has shot the video range, and specifies a cut-out range to be cut out from the video shot by the video shooting unit;
A display instruction transmission unit that transmits information of the video photographing unit specified by the display range designation unit to the distribution server;
A video receiver for receiving the stream video distributed by the distribution server;
A switching timing extraction unit that extracts the identifier indicating that the video has been switched, which is superimposed on the stream video received by the video reception unit;
Instructing a partial video to be cut out from the stream video based on the information on the cut-out range specified by the display range specification unit and the information on the identifier extracted by the switching timing extraction unit and indicating that the video has been switched. An image cutout instruction section;
Based on an instruction from the video cutout instruction unit, a video cutout unit that cuts out the partial video from the stream video;
A video display unit for displaying the partial video clipped by the video cutout unit;
Each of the video shooting units has an overlapping area where a video shot by each of the video shooting units and a video shot by a video shooting unit arranged adjacent to each other overlap, and the size of the overlapping area is the portion It is arranged to be larger than the size of the image,
The video cutout instruction unit matches the switching timing of the video shooting unit that is the cutout source acquired from the display range specifying unit with the switching timing of the video shooting unit extracted by the switching timing extraction unit, and A video distribution system characterized by changing to a position of a cutout range associated with information of a photographing unit.   4. The video distribution system according to claim 3, wherein the video selection / switching timing superimposing unit superimposes the identifier indicating that the video has been switched by superimposing an image watermark on the first image after the video is switched. Or a video distribution system, wherein the identifier indicating that the video of the video photographing unit has been switched is superimposed on a field other than the video being streamed. A video distribution system comprising a video acquisition device, a distribution server, and a video presentation device,
The video acquisition device includes a plurality of video shooting units,
The distribution server
A video input unit for receiving a plurality of videos taken by the plurality of video shooting units;
A display instruction receiving unit that receives information of a video shooting unit shooting a video range that the viewer desires to watch;
A video selection instruction unit for instructing a video to be selected from the plurality of videos based on the information of the video photographing unit received by the display instruction receiving unit;
Based on an instruction from the video selection instruction unit, a video is selected from the plurality of videos to create one stream video, and when the selected video is switched, a delimiter image indicating that the video has been switched is inserted. Video selection / delimiter image insertion part to be
A video delivery unit that delivers the stream video created by the video selection / separation image insertion unit to the video presentation device;
The video presentation device includes:
A display range designating unit that accepts the video range desired to be viewed from a viewer, identifies a video shooting unit that has shot the video range, and specifies a cut-out range to be cut out from the video shot by the video shooting unit;
A display instruction transmission unit that transmits information of the video photographing unit specified by the display range designation unit to the distribution server;
A video receiver for receiving the stream video distributed by the distribution server;
A delimiter image extraction unit that extracts a delimiter image that is inserted into the stream video received by the video reception unit and indicates that the video has been switched;
A video cutout instruction unit for instructing a partial video to be cut out from the stream video based on the information on the cutout range specified by the display range specifying unit and the cutout image extracted by the cutout image extraction unit;
Based on an instruction from the video cutout instruction unit, a video cutout unit that cuts out the partial video from the stream video;
A video display unit for displaying the partial video clipped by the video cutout unit;
Each of the video shooting units has an overlapping area where a video shot by each of the video shooting units and a video shot by a video shooting unit arranged adjacent to each other overlap, and the size of the overlapping area is the portion It is arranged to be larger than the size of the image,
The video cutout instruction unit matches the switching timing of the video shooting unit that is a cut-out source acquired from the display range designating unit with the switching timing of the video shooting unit extracted by the segmented image extraction unit, and A video distribution system characterized by changing to a position of a cutout range associated with information of a photographing unit.   6. The video distribution system according to claim 5, wherein the video selection / separation image insertion unit inserts an image having a black surface as the separation image. A video distribution method in a video distribution system comprising a video acquisition device, a distribution server, and a video presentation device,
The video acquisition device includes a plurality of video shooting units,
Each video shooting unit has an overlapping area where a video shot by each video shooting unit and a video shot by a video shooting unit arranged adjacent to each other overlap, and the size of the overlapping area is the video Arranging to be larger than the size of the partial video displayed by the presentation device;
By the distribution server,
Receiving a plurality of images captured by the plurality of image capturing units;
Superimposing an identifier of the video photographing unit on the plurality of videos;
By the video presentation device,
Receiving a video range to be viewed from a viewer, identifying a video shooting unit shooting the video range, and specifying a cutout range to be cut out from the video shot by the video shooting unit;
Transmitting the specified information of the video photographing unit to the distribution server;
By the distribution server,
Receiving information of a video shooting unit that is shooting the video range that the viewer desires to watch;
Instructing a video to be selected from the plurality of videos on which an identifier is superimposed based on information of the video shooting unit;
Selecting a video from the plurality of videos on which an identifier is superimposed based on the instruction, and creating one stream video;
Delivering the stream video to the video presentation device;
By the video presentation device,
Receiving the stream video;
Extracting an identifier of the video photographing unit superimposed on the stream video;
Instructing a partial video to be cut out from the stream video based on the information on the extracted cut-out range and the extracted information on the identifier of the video shooting unit;
A cutout range associated with the information of the video shooting unit from the stream video at the timing when the specified video shooting unit and the video acquisition unit specified by the extracted identifier of the video shooting unit coincide with each other Cutting out the position of
And a step of displaying the cut out partial video. A video distribution method in a video distribution system comprising a video acquisition device, a distribution server, and a video presentation device,
The video acquisition device includes a plurality of video shooting units,
Each video shooting unit has an overlapping area where a video shot by each video shooting unit and a video shot by a video shooting unit arranged adjacent to each other overlap, and the size of the overlapping area is the video Arranging to be larger than the size of the partial video displayed by the presentation device;
By the distribution server,
Receiving a plurality of images captured by the plurality of image capturing units;
By the video presentation device,
Receiving a video range to be viewed from a viewer, identifying a video shooting unit shooting the video range, and specifying a cutout range to be cut out from the video shot by the video shooting unit;
Transmitting the specified information of the video photographing unit to the distribution server;
By the distribution server,
Receiving information of a video shooting unit that is shooting the video range that the viewer desires to watch;
Instructing a video to be selected from the plurality of videos based on information of the video shooting unit;
Based on the instructions, selecting a video from the plurality of videos to create one stream video, and when the selected video is switched, superimposing an identifier indicating that the video has switched;
Delivering the stream video to the video presentation device;
By the video presentation device,
Receiving the stream video;
Extracting the identifier superimposed on the stream video and indicating that the video has switched;
Instructing a partial video to be cut out from the stream video based on the information on the cutout area specified and the information on the identifier indicating that the extracted video has been switched,
The switching timing of the video capturing unit that is the cut-out source is matched with the switching timing of the extracted video capturing unit, and the position of the extraction range associated with the information of the video capturing unit is extracted from the stream video Steps,
And a step of displaying the cut out partial video.

Images