JP2014082673A - Electronic apparatus, video processing method, information transmission method, video processing program, and information transmission program - Google Patents

Abstract

An electronic apparatus capable of using appropriate video difference information is provided.
According to one embodiment, an electronic apparatus includes a designation unit, a communication unit, and a video processing unit. The designation unit designates one piece of video difference information from a plurality of pieces of video difference information having different amounts of information. The communication means requests and receives designated video difference information. The video processing means has a second image quality second image quality higher than the first image quality based on the first image information corresponding to the first image having the first image quality and the designated image difference information. Video is output.
[Selection] Figure 9

Description

  Embodiments described herein relate generally to an electronic device, a video processing method, an information transmission method, a video processing program, and an information transmission program.

  With the progress of digital TV image quality improvement, digital TVs that display full high-definition video called 2K1K (horizontal 1920 x vertical 1080) are becoming very popular. In addition, digital TVs that display 4K2K (horizontal 4000 x vertical 2000) images that exceed the image quality of full high-definition images have begun to appear.

JP 2011-077771 A

  As described above, when the image quality is improved, the amount of information transmitted and received between the broadcasting station and the video equipment increases. In order to reduce the amount of information, for example, a broadcast station transmits 2K1K video information, a broadcast station or a network server transmits video difference information between 2K1K video information and 4K2K video information, It is considered that an electronic device receives 2K1K video information and video difference information, and reproduces 4K2K video from the received 2K1K video information and video difference information. For example, depending on the communication environment in which the electronic device is placed, it may be difficult for the electronic device to acquire video difference information having a relatively large amount of information.

  An object of the present invention is to provide an electronic device, a video processing method, and a video processing program that can use appropriate video difference information. Another object of the present invention is to provide an electronic device, an information transmission method, and an information transmission program that can transmit video difference information having different information amounts.

  The electronic apparatus according to the embodiment includes a designation unit, a communication unit, and a video processing unit. The designation unit designates one piece of video difference information from a plurality of pieces of video difference information having different amounts of information. The communication means requests and receives designated video difference information. The video processing means has a second image quality second image quality higher than the first image quality based on the first image information corresponding to the first image having the first image quality and the designated image difference information. Video is output.

It is a figure which shows an example of the external appearance of the electronic device which concerns on embodiment. It is a block diagram which shows an example of the internal structure of the electronic device which concerns on embodiment. It is a figure which shows the example of a connection of the transmitter and electronic device (receiver) which concern on embodiment. It is a figure which shows an example of the information processing in the transmitter which concerns on embodiment. It is a figure which shows an example of the information processing in the electronic device (receiver) which concerns on embodiment. It is a block diagram which shows an example of schematic structure of the transmitter which concerns on embodiment. It is a block diagram which shows an example of schematic structure of the electronic device (receiver) which concerns on embodiment. It is a figure which shows an example of the flowchart of the video processing by the transmitter which concerns on embodiment. It is a figure which shows an example of the flowchart of the difference data generation process in the transmitter which concerns on embodiment. It is a figure which shows an example of the flowchart of the video processing of the receiver which concerns on embodiment. It is a figure which shows an example of the flowchart of the difference data reception process in the receiver which concerns on embodiment. It is a figure which shows the 1st example of the difference data designation | designated screen displayed by the receiver which concerns on embodiment. It is a figure which shows the 2nd example of the difference data designation | designated screen displayed by the receiver which concerns on embodiment. It is a flowchart which shows an example of the designation | designated process of the difference data by the receiver which concerns on embodiment. It is a flowchart which shows an example of the designation | designated process of the difference data by the receiver which concerns on embodiment. It is a figure which shows the 1st example of the video display screen displayed by the receiver which concerns on embodiment. It is a figure which shows the 2nd example of the video display screen displayed by the receiver which concerns on embodiment. It is a figure which shows the 3rd example of the video display screen displayed by the receiver which concerns on embodiment. It is a figure which shows the 4th example of the video display screen displayed by the receiver which concerns on embodiment.

  FIG. 1 is a diagram illustrating an example of an appearance of an electronic apparatus (video display device) according to the embodiment. In the present embodiment, a video display device such as a digital TV will be described as an example of an electronic device. However, the present embodiment is not limited to the video display device. For example, the electronic device may be a digital recorder.

  As shown in FIG. 1, the electronic device 100 includes a display device 7 and an operation receiving unit 20, and is configured to be connectable to an external recording device 19 such as a hard disk drive (HDD). The display device 7 displays, for example, a display screen 8 including a video quality display 8a. The operation receiving unit 20 receives an operation signal from an operation device 21 such as a remote controller.

  FIG. 2 is a block diagram illustrating an example of an internal configuration of the electronic apparatus according to the embodiment. As shown in FIG. 2, the electronic device 100 includes a tuner 3, a signal processing unit 4, a video processing unit 5, an audio processing unit 6, a display device 7, a speaker 9, a bus 10, a control unit 11, a RAM 13, a ROM 14, and a flash memory. 15, an internal recording device 17, an external interface 18, an operation reception unit 20, a transmission / reception unit (network interface) 22, and a drive unit 28.

  The control unit 11 includes a CPU 12 and controls each process from video reception to output (display). The RAM 13 functions as a working memory for the control unit 11. The ROM 14 stores a program for controlling the operation of the control unit 11 and the like. The flash memory 15 stores various data (update program and the like) received via the server 27, the network 26, and the transmission / reception unit 22.

  The tuner 3 receives the broadcast signal from the broadcast station via the antenna 2, selects (specifies) the signal of the channel specified by the operation device 21, and outputs it. The signal processing unit 4 separates the video signal and the audio signal included in the signal selected (designated) by the tuner 3, outputs the video signal to the video processing unit 5, and outputs the audio signal to the audio processing unit 6. To do. The video processing unit 5 decodes the video signal, and the display device 7 displays a video based on the decoded video signal. The audio processing unit 6 decodes the audio signal, and the speaker 9 outputs audio based on the decoded audio signal.

  The internal recording device 17 records video and audio signals based on a program recording instruction or program recording reservation. Similarly, the external recording device 19 also records video and audio signals output via the external interface 18 based on a program recording instruction or program recording reservation.

  3A, 3B, and 3C are diagrams illustrating an example of information processing in the transmitter and information processing in the electronic device (receiver) according to the embodiment. FIG. 4 is a block diagram illustrating an example of a schematic configuration of a transmitter according to the embodiment, and FIG. 5 is a block diagram illustrating an example of a schematic configuration of an electronic device (receiver) according to the embodiment.

  As illustrated in FIG. 4, the transmitter 200 includes a downscaler 201, an upscaler 202, a comparison unit 203, encoders 204 and 206, a decoder 205, a broadcast transmission unit 207, and a network distribution unit 208. 5, the receiver 100 includes a broadcast receiving unit 101, a network receiving unit 102, a line speed detecting unit 103, decoders 104 and 105, upscalers 106 and 108, a superimposing unit 107, and the display device 7.

  Here, the correspondence between the block diagram shown in FIG. 2 and the block diagram shown in FIG. 5 will be briefly described. The tuner 3 shown in FIG. 2 corresponds to the broadcast receiving unit 101 shown in FIG. 5, and the transmitting / receiving unit 22 shown in FIG. 2 corresponds to the network receiving unit 102 and the line speed detecting unit 103 shown in FIG. 2 corresponds to the decoders 104 and 105, the upscalers 106 and 108, and the superimposing unit 107 shown in FIG. 5. The signal processing unit 4, the video processing unit 5, and the audio processing unit 6 shown in FIG.

  High-quality (high-resolution) video (4K2K video of horizontal 4000 x vertical 2000, 8K4K video of horizontal 8000 x vertical 4000) is normal-quality (normal resolution) video (such as 2K1K video of horizontal 1920 x vertical 1080) There are cases where the amount of information is larger than that of a high-resolution video and it is difficult to broadcast high-resolution video on a broadcast wave.

  Therefore, the transmitter 200 or an information processing device different from the transmitter 200 executes downscaling for reducing the image quality (resolution) on the high-quality source video (high-quality source video), and starts from the high-quality source video. Generate normal-quality video (normal-quality video), perform up-scaling to increase the image-quality (resolution) on the generated normal-quality video, and generate high-quality video (high-quality up-scaling video) from normal-quality video Generate and compare the high-quality source video and the high-quality upscaling video to create video difference information (hereinafter, difference data). The transmitter transmits normal-quality video information corresponding to the normal-quality video on a broadcast wave, and transmits (distributes) difference data on a network or a broadcast wave. The receiver 100 receives normal-quality video information, receives differential data, generates high-quality video based on the normal-quality video information and differential data, and outputs (displays) the high-quality video.

  With reference to FIG. 3A, FIG. 3B, FIG. 3C, FIG. 4, and FIG. 5, the generation of difference data and the video processing based on the difference data will be described in detail.

  First, generation of difference data by the transmitter will be described with reference to FIGS. 3B and 4. The downscaler 201 of the transmitter 200 (or an information processing device different from the transmitter 200) executes downscaling on a high-quality source video (for example, 8K4K source video) to be broadcast, and high-quality downscaling. Generate video (eg 4K2K downscaling video). Further, the downscaler 201 performs downscaling on the 4K2K downscaling video, and generates a standard quality video (for example, 2K1K downscaling video). That is, the downscaler 201 converts the high-quality source video into a video that can be broadcast.

  In the above description, the source video is an 8K4K video. However, when the source video is a 4K2K video, the downscaler 201 performs downscaling on a high-quality source video (for example, 4K2K source video). , Generate standard definition video (2K1K downscaling video).

  The encoder 204 encodes 2K1K downscaling video, and the broadcast transmission unit 207 broadcasts 2K1K video information using broadcast waves. Further, the decoder 205 decodes 2K1K video from the encoded 2K1K video information, and the upscaler 202 performs upscaling on the decoded 2K1K video to generate 4K2K upscaling video. If the original video is an 8K2K video, the upscaler 202 further performs upscaling on the 4K2K upscaling video to generate an 8K4K upscaling video.

  The comparison unit 203 compares the 8K4K original video and the 8K4K upscaling video, and obtains difference data (8K4K differential data) between the 8K4K original video and the 8K4K upscaling video. Alternatively, the comparison unit 203 compares the 4K2K original video and the 4K2K upscaling video, and acquires difference data (4K2K differential data) between the 4K2K original video and the 4K2K upscaling video.

  Further, the comparison unit 203 acquires difference data (difference data corresponding to the comparison result) for each comparison process by a plurality of comparison processes. For example, the comparison processing unit 203 can acquire high-precision first difference data (8K4K difference data and 4K2K difference data with a relatively large amount of information) by high-level accuracy comparison processing, The second difference data (8K4K difference data and 4K2K difference data having a smaller amount of information than the first difference data) that is less accurate than the first difference data can be obtained through the comparison process in FIG. Through the comparison process, it is also possible to acquire third difference data (8K4K difference data and 4K2K difference data having a smaller amount of information than the second difference data) with lower accuracy than the second difference data.

  The encoder 206 encodes each difference data and generates distributable difference data. The network distribution unit 208 receives a request from the receiver 100 via the network line, and transmits (distributes) differential data corresponding to the received request.

  That is, the transmitter 200 (or an information processing device different from the transmitter 200) generates a plurality of difference data having different information amounts by a plurality of different comparison processes, and holds the plurality of difference data in a distributable manner. The difference data corresponding to the request from the receiver 100 is distributed.

  Next, video processing based on difference data by the receiver will be described with reference to FIGS. 3C and 5.

  The broadcast receiver 101 of the receiver 100 receives the broadcast wave (2K1K video information) transmitted from the broadcast transmitter 207 of the transmitter 200. The control unit 11 of the receiver 100 selects (specifies) one difference data (candidate) from among a plurality of difference data (candidates) having different amounts of information. For example, the control unit 11 selects (designates) one difference data according to the network reception unit 102 (communication state (mixed state, communication speed) of the network line). Alternatively, the control unit 11 selects (designates) one difference data according to the resolution of the display device 7. Alternatively, the control unit 11 selects (specifies) one difference data in accordance with user designation. Alternatively, the control unit 11 selects (specifies) one difference data according to one or more conditions among the communication state of the network receiving unit 102, the resolution of the display device 7, and user designation.

  For example, the line speed detecting unit 103 detects the communication speed of the network receiving unit 102 (network line) in real time, and the control unit 11 can select a plurality of differential data candidates having different amounts of information according to the detection result of the communication speed. One difference data is selected (designated) from the list. The control unit 11 selects (specifies) the first difference data when the first communication speed is detected, and the first difference when the second communication speed slower than the first communication speed is detected. When the second difference data having a smaller information amount than the data is selected (designated) and a third communication speed slower than the second communication speed is detected, the third difference having a smaller information amount than the second difference data is detected. Select (specify) data.

  In addition to the above, when the first communication speed is detected and the resolution of the display device 7 corresponds to 8K4K, the control unit 11 is the first difference data, which is 8K4K difference data (or 4K2K difference). Select (specify) data. In addition, when the second communication speed is detected and the resolution of the display device 7 corresponds to 8K4K, the control unit 11 selects the second difference data and 8K4K difference data (or 4K2K difference data) ( specify. In addition, when the third communication speed is detected and the resolution of the display device 7 corresponds to 8K4K, the control unit 11 selects the third difference data and 8K4K difference data (or 4K2K difference data) ( specify.

  Further, when the first communication speed is detected and the resolution of the display device 7 corresponds to 4K2K, the control unit 11 selects (specifies) 4K2K difference data that is the first difference data. Further, when the second communication speed is detected and the resolution of the display device 7 corresponds to 4K2K, the control unit 11 selects (designates) 4K2K difference data that is the second difference data. In addition, when the third communication speed is detected and the resolution of the display device 7 corresponds to 4K2K, the control unit 11 selects (designates) 4K2K difference data that is third difference data.

  The network receiving unit 102 requests the selected (designated) difference data to the transmitter 200 via the network line, and the transmitter 200 receives the request and distributes the difference data according to the request. Then, the network receiving unit 102 receives the difference data distributed from the transmitter 200.

  As described above, the receiver 100 receives broadcast waves (2K1K video information) and receives difference data, the decoder 104 decodes 2K1K video from the 2K1K video information, and the decoder 105 decodes difference data. The upscaler 106 upscales the 2K1K video according to the received difference data.

  When the resolution of the display device 7 corresponds to 4K2K, the network receiving unit 102 requests and receives 4K2K difference data, so the upscaler 106 upscales the 2K1K video to 4K2K video, and superimposes the unit 107. Superimposes the 4K2K upscaling video and the 4K2K difference data, generates a 4K2K superimposed video, and outputs the 4K2K superimposed video to the display device 7. Thereby, the display device 7 displays the 4K2K superimposed video. When the network speed detection unit 103 detects that the network is not connected (when the difference data is not received, when the difference data cannot be received, etc.), the upscaler 106 upscales the 2K1K video to the 4K2K video. Then, 4K2K upscaling video is output to the display device 7. Thereby, the display device 7 displays the 4K2K upscaling video.

  When the resolution of the display device 7 corresponds to 8K4K, for example, the network receiving unit 102 requests and receives 8K4K differential data, so the upscaler 106 upscales the 2K1K video to 8K4K video and superimposes it. The unit 107 superimposes the 8K4K upscaling video and the 8K4K difference data, generates an 8K4K superimposed video, and outputs the 8K4K superimposed video to the display device 7. Thereby, the display device 7 displays the 8K4K superimposed video. Alternatively, when the resolution of the display device 7 corresponds to 8K4K, the network receiving unit 102 requests and receives 4K2K difference data, so the upscaler 106 upscales the 2K1K video to 4K2K video and superimposes it. The unit 107 superimposes the 4K2K upscaling video and the 4K2K difference data to generate a 4K2K superimposed video, and the upscaler 108 upscales the 4K2K superimposed video to an 8K4K video and outputs the 8K4K upscaling video to the display device 7. Is output. Thereby, the display device 7 displays the 8K4K upscaling video. When the network speed detection unit 103 detects that the network is not connected (when the difference data is not received, when the difference data cannot be received, etc.), the upscaler 106 upscales the 2K1K video to the 4K2K video. Further, the upscaler 108 upscales the 4K2K upscaling video to 8K4K video, and outputs the 8K4K video upscaling video to the display device 7. Thereby, the display device 7 displays the 8K4K upscaling video.

  FIG. 6 is a diagram illustrating an example of a flowchart of video processing by the transmitter according to the embodiment.

  In the present embodiment, the case where the resolution of the source video is 4K2K or 8K2K will be described, but a source video having a resolution other than these may be used.

  Transmitter 200 checks whether the resolution of the source video is 4K2K size or less (ST101). When the resolution of the source video exceeds 4K2K size (ST101, NO), the source video is downscaled to 4K2K size (ST102). Next, it is downscaled to 2K1K size (ST103), and the downscaled data is encoded (ST104). The encoded data is transmitted by broadcast waves (ST105). The encoded data is decoded again (ST106) and upscaled to 4K2K size (ST107). If the resolution of the source video exceeds the 4K2K size (ST108, NO), upscaling to 8K4K size is performed (ST109). Then, difference data is generated for each upscaled data (ST111). Here, since there are two types of 4K2K and 8K2K, the loop processing is performed twice (ST110).

  FIG. 7 is a diagram illustrating an example of a flowchart of difference data generation processing in the transmitter according to the embodiment.

  A plurality of methods are prepared as a method of generating difference data by comparing the source video and the upscaling video, and here, a case where the number is N will be described (ST201). First, one of a plurality of methods is selected (designated) (ST202). The source video and the upscaled video are compared according to the selected (designated) method (ST203), and difference data is generated (ST204). The generated difference data is encoded (ST205), and distribution difference data is generated. This is repeated for each generation method, and all difference data is generated.

  Difference data of various data sizes can be generated by the difference data generation method.

  FIG. 8 is a diagram illustrating an example of a flowchart of video processing of the receiver according to the embodiment.

  The resolution of the video that can be displayed by the receiver according to the present embodiment and the resolution of the difference data to be distributed are 4K2K or 8K2K, but other resolutions may be used.

  First, the receiver 100 receives a broadcast wave (ST301) and decodes the received data (ST302). The resolution of the decoded video is 2K1K size. Moreover, the receiver 100 receives difference data (ST303). Details of reception of the difference data will be described with reference to FIG.

  Next, it is determined whether to use difference data (ST304). When the difference data is not used (ST304, NO), processing according to the display resolution of the display device 7 is performed. If the display resolution is 8K4K size (ST305, YES), the video received and decoded by broadcast waves is upscaled to 8K4K size (ST308), and if the display resolution is 4K2K size (ST305, NO), broadcast waves The video received and decoded in step 1 is upscaled to 4K2K size (ST307).

  When using difference data (ST304, YES), processing according to the resolution of the difference data is performed. If the resolution of the difference data is 8K4K size (ST306, YES), the video received and decoded by the broadcast wave is upscaled to 8K4K size (ST310), and if the resolution of the difference data is 4K2K size (ST306, NO) ), And up-scaling the video received and decoded by the broadcast wave to 4K2K size (ST309). Then, the upscaled video and the difference data are superimposed (ST311). Further, processing corresponding to the display resolution of the display device 7 is performed. If the display resolution is 8K4K size (ST312, YES), if the current image size is 4K2K size (ST313, NO), upscaling to 8K4K size is performed (ST314).

  The display device 7 displays an upscaled video without using the difference data, or an upscaled video obtained by the superimposition process using the difference data (ST315).

  FIG. 9 is a diagram illustrating an example of a flowchart of difference data reception processing in the receiver according to the embodiment.

  In the present embodiment, the resolution of the video that can be displayed by the receiver 100 and the resolution of the difference data to be distributed are 4K2K or 8K2K, but other resolutions may be used.

  First, the speed of the network line connected to the receiver 100 is detected (ST401). If the line is not connected to the network (ST402, NO), the difference data is not used (ST403).

  When connected to the network (ST402, YES), processing corresponding to the display resolution of the display device 7 of the receiver 100 is performed. When the display resolution is 8K4K size (ST404, YES), the data amount of all of the distributed difference data of 8K4K size is compared with the detected line speed, and receivable difference data is selected (ST409). If there is a receivable 8K4K size difference data being distributed (ST410, YES), the optimum difference data (for example, the most accurate difference data among them) is selected (specified) ( ST411) Requests to transmitter and receives. If there is no receivable difference data of 8K4K size (ST410, NO), the process proceeds to the case where the display resolution is 4K2K size.

  When the display resolution is 4K2K size (ST404, NO), the data amount of all 4K2K size difference data distributed is compared with the detected line speed, and receivable difference data is selected (ST405). If there is a receivable 4K2K size difference data, the optimum difference data (for example, the most accurate difference data among them) is selected (specified) (ST407), and the transmitter Request and receive. If there is no 4K2K size difference data that can be received (ST406, NO), the difference data is not used (ST403).

  The received difference data is decoded (ST408), and an image of 8K2K size or 4K2K size is generated from the video received and decoded by the broadcast wave and the decoded difference data.

  Here, an example of a method for generating video difference information will be described.

  A video (for example, 2K1K video) with a reduced resolution of the source video (for example, 4K2K video or 8K4K video) is generated, and a video (upscaled video) obtained by upscaling the video to the resolution of the source video is generated. Difference data is generated from the difference between the source video and the upscaling video. For example, the source video and the upscaling video are compared in pixel units, and the difference is obtained. For example, if the bit precision of the pixel data is N bits and the bit precision of the difference is (N + 1) bits, the video restored from the differential data will be an equivalent video to the source video, but the difference data information The amount increases. By converting low-order M bits (N> M) of N-bit pixel difference data to discrete data such as 0, the difference data of adjacent pixels is likely to have the same value. It is possible to reduce the amount of data. However, in this case, it is predicted that the difference between the restored video and the source video will increase. Also, these bit precisions are switched in units of screens, or switched according to the area in the screen. For example, the center of the screen is processed with full bit precision, and the bit precision is reduced toward the edge of the screen. It is also possible. Furthermore, when acquiring the difference data, it is possible to adjust the data amount of the difference data by acquiring the difference between the luminance component and the color difference component or acquiring the difference between the luminance component or the color difference component. is there. Also in this case, variations can be increased by dividing the acquisition method within the screen unit and within the screen. In this way, a plurality of difference data having different data amounts can be generated.

  In addition to automatically switching the difference data by automatic detection of the network line speed, the user can also specify the difference data. For example, the user may designate one difference data (candidate) from a plurality of difference data (candidates) having different data amounts via the operation device 21 and the difference data designation screen illustrated in FIG. 10 or FIG. it can. The control unit 11 receives the difference data designated by the user, and the network reception unit 102 requests the designated difference data from the transmitter 200 via the network line.

  For example, as shown in FIG. 10, the user can designate one difference data from highly accurate difference data, standard difference data, and simple difference data. The high-precision difference data is data generated by acquiring the difference between the luminance component and the color difference component with a high sampling number, for example. The standard difference data is data generated by acquiring the difference between the luminance component and the color difference component by the standard sampling number, for example. The simple difference data is, for example, data generated by acquiring a difference between luminance components or color difference components with a standard sampling number. Furthermore, recommended difference data corresponding to the current line speed is guided on the designation screen.

  Alternatively, as shown in FIG. 11, the user can designate one difference data from among the high resolution difference data (8K4K), the high resolution difference data (4K2K), and the simple difference data. When the user designates the high resolution difference data (8K4K), the receiver 100 executes image processing based on the high resolution difference data (8K4K) (ST306 in FIG. 8, processing subsequent to YES). When the user designates high resolution difference data (4K2K), the receiver 100 performs image processing based on the high resolution difference data (4K2K) (ST306 in FIG. 8, processing subsequent to NO). Further, differential data that can be supported by the current monitor (display device) is guided on the designation screen.

  For example, even when the display device 7 supports 8K4K size video display, in order to reduce the occupancy rate of the network line, the user selects (specifies) the difference data shown in the operation device 21 and FIG. 4K2K difference data can be specified via the screen. Further, the control unit 11 determines appropriate difference data from the designated 4K2K difference data (for example, high-accuracy and relatively large amount of 4K2K difference data) and the line speed, and in response to this, the network reception unit 102 requests appropriate difference data from the transmitter 200 via the network line.

  For example, when the line speed is low, the control unit 11 uses not the specified 4K2K difference data (for example, 4K2K difference data with a relatively high amount of information with high accuracy) but the 4K2K difference data with a small amount of information as appropriate difference data. to decide. Further, when it is determined that it is difficult to receive the difference data and the difference data cannot be received, the control unit 11 selects (designates) not to use the difference data.

  The network receiving unit 102 automatically detects the network line speed. However, the network receiving unit automatically detects the line speed not only when starting the viewing of the differential data distribution program but also during viewing, and the control unit 11 determines the line speed according to the line speed. It is also possible to dynamically switch the difference data to be acquired. For example, the control unit 11 controls the acquisition of the first difference data when the first line speed is detected, and when the second line speed slower than the first line speed is detected, The acquisition of the second difference data having a data amount smaller than that of the first difference data is controlled. Thereby, when the first line speed is detected, the first difference data and the video generated from the received video are displayed, and when the second line speed is detected, the second difference is displayed. A video generated from the data and the received video is displayed.

  Further, the control unit 11 controls output of the difference data selection (designation) result. For example, when the control unit 11 controls acquisition of the first difference data, the control unit 11 controls output of information indicating that the first difference data is used. Thereby, the display apparatus 7 displays the image | video containing the information which shows using 1st difference data. For example, the display device 7 displays information on the difference data (first difference data) being selected (designated) on the screen using an OSD or the like. Furthermore, when the control unit 11 switches from the first difference data to the second difference data and controls the acquisition of the second difference data, an output of information indicating that the second difference data is used is output. Control. Thereby, the display device 7 displays an image including information indicating that the second difference data is used. For example, the display device 7 displays information on the difference data (second difference data) being selected (designated) on the screen using an OSD or the like.

  Thereby, the user can know the difference data currently used, and can also know the change of the difference data.

  In addition, when the user designates difference data, the control unit 11 determines whether difference data specified by the user is used, or whether difference data different from the difference data specified by the user is used. Control the output of. Further, the control unit 11 controls the output of information regarding whether or not the difference data designated by the user is the optimum difference data, or information related to the recommended difference data that is more optimal than the difference data designated by the user. Correspondingly, the display device 7 displays the above information on the screen by OSD or the like.

  FIG. 12A and FIG. 12B are flowcharts illustrating an example of differential data designation processing by the receiver according to the embodiment.

  For example, when the user designates difference data via the operation device 21 and the difference data designation screen shown in FIG. 10 or FIG. 11 (ST501, YES), the receiver 100 (control unit 11) uses the user designated difference data. Is compatible with the display resolution of the display device 7 (ST502), and further, it is determined whether the user-specified difference data can be received at the current line speed (ST503).

  If the user-specified difference data corresponds to the display resolution (ST502, YES) and can be received at the current line speed (ST503, YES), the receiver 100 (network receiving unit 102) will receive the user-specified difference data. (ST505) and the user-specified difference data is received (ST506). Furthermore, the receiver 100 restores the high-quality video from the video received on the broadcast wave and the difference data (ST507), and displays the high-quality video including information indicating that the user-specified difference data is being used ( (See ST508, FIG. 13).

  If the user-specified difference data corresponds to the display resolution (ST502, YES) and cannot be received at the current line speed (ST503, NO), the receiver 100 changes to the difference data that can be received at the current line speed. Change (ST514), request the changed difference data (ST515), and receive the changed difference data (ST516). Furthermore, receiver 100 restores the high-quality video from the video and the difference data received through the broadcast wave (ST517), and displays the high-quality video including information indicating that the changed difference data is used (ST518). FIG. 14).

  If the user-specified differential data does not correspond to the display resolution (ST502, NO), the receiver 100 changes to differential data that corresponds to the display resolution and can be received at the current line speed (ST524). The requested difference data is requested (ST525), and the changed difference data is received (ST526). Further, receiver 100 restores the high-quality video from the video and the difference data received by the broadcast wave (ST527), and displays the high-quality video including information indicating that the changed difference data is used (ST528). FIG. 14).

  When the user does not designate the difference data (ST501, NO), the receiver 100 automatically selects (designates) the difference data that corresponds to the display resolution and can be received at the current line speed (ST534), and automatically selects the difference data. The (designated) difference data is requested (ST535), and the automatically selected (designated) difference data is received (ST536). Furthermore, the receiver 100 restores the high-quality video from the video received on the broadcast wave and the difference data (ST537), and receives the high-quality video including information indicating that the automatically selected (designated) difference data is used. Display (ST538, see FIG. 15).

  When the difference data cannot be received, the receiver performs a scaling process on the video received by the broadcast wave, and displays a standard quality video including information indicating that the difference data is not used (see FIG. 16).

  Further, since the line speed is detected in real time, the receivable difference data may change. For example, if the user-specified differential data initially corresponds to the display resolution and can be received at the current line speed, the receiver 100 includes information indicating that the user-specified differential data is being used. The image quality video is displayed (see FIG. 13). When the user-specified difference data becomes unreceivable at a certain line speed at a certain timing, the receiver 100 changes the difference data to be receivable at the current line speed. Thereby, the receiver 100 displays a high-quality video including information indicating that the changed difference data is used (see FIG. 14). That is, in this case, the receiver 100 switches the screen display shown in FIG. 13 to the screen display shown in FIG.

  Similarly, the receiver 100 may switch the screen display shown in FIG. 13 to the screen display shown in FIG. 15, or may switch the screen display shown in FIG. 14 to the screen display shown in FIG. 15.

  In the above explanation, the resolution of the source video and the display resolution of the display device 7 of the receiver 2 are described as 4K2K and 8K4K. However, the resolution may be 6K3K or an aspect ratio of 21: 9. It becomes possible.

  In the above description, a case where a video (2K1K video) is received by broadcast waves and a high-quality video is generated from the received video and difference data and output (displayed) has been described. For example, via the drive unit 28 It is also possible to read video (2K1K video) from package media such as an optical disc, and generate and output (display) high-quality video from the received video and difference data.

  According to the present embodiment, even if there is a difference in receiver specifications for each user or a difference in network line speed connected to the receiver, it is possible to view a high-resolution video optimal for the environment.

  The present embodiment will be summarized below.

(1) The transmitter can deliver a plurality of differential data having different data amounts for one video.

(2) The transmitter can distribute differential data having different data amounts by changing the number of differential samplings for one video.

(3) The transmitter can distribute difference data having different data amounts by using a difference between luminance components for one video, or using a luminance component and a color difference component.

(4) The transmitter can reduce the total amount of difference data by reducing the amount of difference data outside the screen center area. For example, the transmitter can acquire and distribute equal difference data for the entire screen and difference data in which the weights of the areas other than the screen center area are reduced for one video.

(5) The transmitter can deliver differential data with different resolutions.

(6) The receiver can detect the speed of the connected line and select (designate) optimum difference data from a plurality of difference data according to the detected line speed.

(7) The receiver may dynamically detect the speed of the connected line, and select (designate) optimum difference data from a plurality of difference data according to the dynamically detected line speed. it can.

(8) The receiver can select (designate) differential data that can be received according to the display resolution, and change the scaling processing according to the selection (designation) result.

(9) The receiver can notify the user of information relating to the selected (designated) difference data in accordance with the connection state of the line.

  Note that all the procedures of the above processing (difference data generation, distribution, selection (designation), reception, video processing, etc.) can be executed by software. For this reason, the above-described processing can be easily realized only by installing and executing this program on a normal computer through a computer-readable storage medium storing a program for executing the above-described processing procedure.

  For example, the receiver 100 can read the program from a computer-readable storage medium via the drive unit 28, store the read program in the flash memory 15, and complete the installation of the program. Alternatively, the receiver 100 can download the program through the transmission / reception unit 22 and the like, store the downloaded program in the flash memory 15, and complete the installation of the program. Thereby, the control unit 11 of the receiver 100 corresponding to the computer can easily realize the above processing (selection (designation), reception, video processing, etc.) based on the installed program.

  Similarly, the transmitter 200 can easily realize the above-described processing (difference data generation, distribution, etc.) based on the installed program.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 1 ... Electronic device, 2 ... Antenna, 3 ... Tuner, 4 ... Signal processing part, 5 ... Video processing part, 6 ... Audio | voice processing part, 7 ... Display apparatus, 9 ... Speaker, 10 ... Bus, 11 ... Control part, 13 ... RAM, 14 ... ROM, 15 ... flash memory, 17 ... internal recording device, 18 ... external interface, 20 ... operation receiving unit, 22 ... transmission / reception unit (network interface), 28 ... drive unit, 101 ... broadcast receiving unit, 102 DESCRIPTION OF SYMBOLS ... Network receiving part 103 ... Line speed detection part 104, 105 ... Decoder, 106, 108 ... Up scaler, 107 ... Superimposition part, 201 ... Down scaler, 202 ... Up scaler, 203 ... Comparison part, 204, 205, 206 ... Encoder, 207 ... Broadcast transmission unit, 208 ... Network distribution unit

Claims (16)

Designation means for designating one piece of video difference information from a plurality of pieces of video difference information having different amounts of information;
Communication means for requesting and receiving the specified video difference information;
A video that outputs a second video having a second image quality higher than the first image quality based on the first video information corresponding to the first video having the first image quality and the specified video difference information. Processing means;
Electronic equipment comprising.   The designation means includes the video from the plurality of pieces of video difference information generated from the difference between the first video information having a first resolution and second video information having a second resolution higher than the first resolution. The electronic device according to claim 1, wherein difference information is designated.   The electronic device according to claim 1 or 2, wherein the specifying means specifies the video difference information according to a communication speed by the communication means.   The electronic device according to claim 3, wherein the designation unit switches designation of the video difference information in accordance with a dynamically detected communication speed.   The first video difference information is designated in response to detection of the first communication speed by the communication means, and the first video difference information is specified in response to detection of a second communication speed higher than the first communication speed by the communication means. 5. The electronic device according to claim 1, further comprising detection means for designating the second video difference information having a larger amount of information than the one video difference information.   The video processing means outputs the second video having the second image quality based on the video information and the first video differential information, and based on the video information and the second video differential information, The electronic device according to claim 5, wherein the third image having a higher image quality than the second image quality is output.   The electronic device according to claim 1, wherein the specifying unit specifies the video difference information according to a resolution of a display unit that displays a video.   The electronic apparatus according to claim 1, wherein the video processing unit outputs the second video including information related to the designated video difference information. Receiving means for receiving a request for video difference information;
Transmission means for transmitting video difference information corresponding to a request among a plurality of video difference information having different information amounts;
Electronic equipment comprising.   The electronic apparatus according to claim 9, wherein the transmission unit transmits video difference information corresponding to a request among the plurality of video difference information generated according to a difference in the number of samplings.   The transmission means includes first video difference information of a first information amount generated based on a difference between a luminance component or a color difference component, and the first information amount generated based on a difference between the luminance component and the color difference component. The electronic device according to claim 9, which transmits video difference information corresponding to a request among the second video difference information having a larger second information amount.   The electronic device according to claim 9, wherein the transmission unit transmits video difference information corresponding to a request among video difference information of different resolutions. Specify one piece of video difference information from a plurality of pieces of video difference information with different information amount
Request and receive the specified video difference information;
A video that outputs a second video having a second image quality higher than the first image quality based on the first video information corresponding to the first video having the first image quality and the specified video difference information. Processing method. Receive video difference information request,
An information transmission method for transmitting video difference information corresponding to a request among a plurality of pieces of video difference information having different amounts of information. A procedure for designating one piece of video difference information from a plurality of pieces of video difference information having different amounts of information;
Requesting and receiving the specified video difference information; and
A procedure of outputting a second video image having a higher image quality than the first image quality based on the first video information corresponding to the first video image having the first image quality and the designated video difference information. When,
A video processing program for causing a computer to execute. A procedure for receiving a request for video difference information;
Among a plurality of pieces of video difference information having different information amounts, a procedure for transmitting video difference information corresponding to the request;
Information transmission program for causing a computer to execute.

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