JP4354456B2 - Transmission of high quality A / V data corresponding to the transmitted low quality A / V data - Google Patents

Description

  The present invention relates to transmission of high-quality audio / video data according to a request, and in particular, transmits high-quality audio / video data according to a user's request in a videophone by wireless communication using a mobile phone or the like. Related to the system.

  Recently, mobile phones having a videophone function have appeared. Such a telephone is not only used as a mere call but is expected to be applied to a monitoring device using video. Such a telephone employs a global standard (3G-324M), which enables mutual communication between different telephones of different carriers. A mobile phone can also use a web page and an e-mail service that are generally provided on the Internet, and is typically used with an information processing device such as a personal computer (PC). Communication of information using these services is possible.

  Mobile wireless communication has a very poor communication environment, and the transmission data rate is greatly limited as compared to wired communication. Accordingly, when audio / video data of, for example, a videophone is transmitted and received between mobile phones, the resolution, image quality, frame rate and / or sound quality must be lowered.

Japanese Laid-Open Patent Publication No. 8-140143 (A) published on May 31, 1996 by Yakita describes a mobile videophone system that can be shared by a mobile phone and a videophone. In this system, communication between the base station and the video phone uses different time slots in the frame of the frequency channel for audio data and image data.
Japanese Patent Laid-Open No. 8-140143

  Some videophones that are currently on the market using mobile radio communication have a function of storing received audio / video data. However, since the communication speed is low, the quality of the transmitted audio / video data is low. The quality of the stored audio / video data may be insufficient for certain applications such as indoor surveillance.

  Inventors enable acquisition of corresponding high-quality audio and / or video data when the quality of audio and / or video data transmitted and received using the videophone function in a mobile phone is insufficient Recognized that there was a need for the system.

  An object of the present invention is to enable the acquisition of high quality audio and / or video data corresponding to low quality audio and / or video data already received at a terminal.

SUMMARY OF THE INVENTION According to a feature of the present invention, an apparatus for receiving audio and / or video data using mobile radio communication is encoded using a predetermined channel over a network from another apparatus. Receiving means for receiving low-quality and / or high-quality audio and / or video data, and decoding for decoding the received audio and / or video data according to the quality and reproducing voice and / or images Means, presenting means for presenting the reproduced sound and / or image in accordance with the quality, and control means for transmitting a control signal for controlling the other apparatus to the other apparatus. Yes.

During or after the receiving means receives low quality audio and / or video data from the other device and the presentation means presents low quality audio and / or images reproduced by the decoding means In response to the user's operation, the control means sends a request for capturing high-quality audio and / or video data corresponding to the low-quality audio and / or video data via the network. Send to that other device. The receiving means further receives the encoded high quality audio and / or video data on a channel wider than the predetermined channel receiving the encoded low quality audio and / or video data. Receive.

According to another feature of the invention, an apparatus for transmitting audio and / or video data using mobile radio communication comprises a capturing means for capturing audio and / or video data and the captured audio and / or video data. Or encoding means for encoding the video data with a resolution converted according to the required quality to produce encoded low and / or high quality audio and / or video data; Transmitting the encoded low-quality audio and / or video data on the first channel to another device via the second channel and the code on the second channel, which is wider than the first channel over the network Transmitting means for transmitting the converted high quality audio and / or video data and the control signal from the other device Thus it comprises control means for controlling the encoding means.

  The present invention also relates to a program for realizing the above-described apparatus.

  The invention also relates to a method for realizing the above-described apparatus.

  According to the present invention, it is possible to obtain high quality audio and / or video data corresponding to low quality audio and / or video data already received at the terminal.

  In the drawings, the same elements have the same reference numerals.

FIG. 1 shows the configuration of an information processing device or terminal according to an embodiment of the present invention. FIG. 2 shows components of each device related to communication of A / V data with another information processing device having the same function as the information processing device of FIG. FIG. 3 shows a communication procedure between the first information processing device and the second information processing device. FIG. 4 is a modification of the communication procedure of FIG. 3 and shows another communication procedure between the first information processing device and the second information processing device. FIG. 5 shows registration of information related to each device to the server by the first and second information processing devices, and extraction of information related to the function of the second information processing device of the communication partner by the first information processing device. ing. FIG. 6A shows an example of transmission of high-quality A / V data from the second information processing device to the first information processing device. FIG. 6B illustrates an example of transmission of high-quality monitoring A / V data from the second information processing device to the first information processing device.

  FIG. 1 shows a configuration of an information processing device such as a mobile phone having a video telephone function or a terminal 100 according to an embodiment of the present invention.

  In FIG. 1, a first information processing apparatus 100 is connected to a high quality audio / video data (A / VD) requesting unit 102, for example, a digital / video (A / VD) requesting unit 102 in connection with transmission / reception and processing of audio / video (A / V) data. An A / V data capturing unit 104 comprising a CCD image capturing device for capturing images such as a video camera and a microphone for capturing sound, an LED display 105 for displaying images, and a videophone A / V data buffer unit 106 , Video phone A / V data resolution conversion and encoding unit 114, video phone A / V data storage unit 116, video phone A / V data transmission unit 118, high quality A / V data buffer unit 122, high quality A / V V data resolution conversion and encoding unit 124, high quality A / V data storage unit 126, high quality A / V data transmission unit 128, and wireless, for example Receiver or connected to the telephone line the wired transceiver such transceivers are equipped with (TX / RX) or network interface 130. The first information processing apparatus 100 further includes a request reception unit 152, a videophone A / V data reception unit 162, a videophone A / V data storage unit 164, a videophone A / V data decoding unit 166, a high quality A / V A / V presentation comprising a V data receiving unit 172, a high quality A / V data storage unit 174, a high quality A / V data decoding unit 176, an A / V data selection unit 178, and a display and speaker such as an LCD, for example. Part 180.

  As an alternative configuration, only the high quality A / V data buffer unit 122 may be provided without providing the videophone A / V data buffer unit 106. In this case, the high-quality A / V data is captured by the A / V data capturing unit 104 and stored in the high-quality A / V data buffer unit 122, and the high-quality A / V data resolution conversion and encoding unit 124 The encoding may be performed without converting the resolution of the high quality A / V data. Also, the video phone A / V data resolution conversion and encoding unit 114 converts the stored high quality A / V data into video phone A / V data with a low resolution and encodes it.

  When the encoding speed of the videophone A / V data resolution conversion and encoding unit 114 and the high quality A / V data resolution conversion and encoding unit 124 is always equal to or lower than the transmission rate, the videophone A / V The V data storage unit 116 and / or the high quality A / V data storage unit 126 may be omitted.

  The components 102, 114, 118, 124, 128, 152, 162, 166, 172, 176 and 178 may be implemented in the form of hardware such as an integrated circuit or according to a program stored in the memory 14. It may be implemented (implemented) on the processor 12. The processor 12 also performs other communication, control and processing as well.

  In FIG. 1, when the videophone function of the first information processing device 100 is activated, the A / V data capturing unit 104 captures audio / video data from the microphone and the camera, and the A / V data buffer unit. It stores in 106.

  The videophone A / V data resolution conversion and encoding unit 114 extracts the video data of the selected picture or frame and the audio data related thereto from the A / V data buffer unit 106, and identifies the communication partner. Video data resolution conversion and audio / video data encoding are performed so as to conform to the video phone standard that can be used in the information processing equipment of this type, and the encoded video phone A / V data is converted into the video phone A / V. The data is stored in the V data storage unit 116. The videophone A / V data transmission unit 118 takes out the encoded videophone A / V data from the videophone A / V data 116 and supplies it to the transceiver 130. However, the videophone A / V data transmission unit 118 does not go through the videophone A / V data storage unit 116, but receives the videophone A / V data directly received from the videophone A / V data resolution conversion and encoding unit 114. May be supplied to the transceiver 130. The transceiver 130 transmits the encoded videophone A / V data to the other information processing device via the mobile telephone network and / or the fixed telephone network.

  In response to a request received from another device, the request receiving unit 152 causes the A / V data capturing unit 104 to capture high quality A / V data, and converts the high quality A / V data into high quality A / V data. The low-quality A / V data of the videophone is stored in the A / V data buffer unit 106. As an alternative configuration, the request receiving unit 152 causes the A / V data capturing unit 104 to store the captured high quality A / V data only in the high quality A / V data buffer 122, and the high quality A / V data. The data may be supplied to the videophone A / V data resolution conversion and encoding unit 114 and the high quality A / V data resolution conversion and encoding unit 124. High quality audio / video data has a higher resolution, encoding rate and / or frame rate than low quality audio / video data for videophones.

  The high quality A / V data resolution conversion and encoding unit 124 retrieves the video data of the frame and the audio data associated with the frame from the A / V data buffer unit 122, and the high quality requested by the other device. The resolution of video data is converted and the A / V data is encoded so as to conform to the quality A / V standard and stored in the high quality A / V data storage unit 126. However, if the resolution of the captured A / V data is the same as the resolution of the high quality A / V data, no resolution conversion is necessary. The videophone A / V data transmission unit 128 takes out the encoded videophone A / V data from the high quality A / V data storage unit 126 and supplies it to the transceiver 130. The transmitter / receiver 130 transmits the high-quality A / V data through a mobile telephone network through an available channel different from the video phone channel.

  The videophone A / V data receiving unit 162 receives the videophone A / V data received by the receiver of the transceiver 130 and stores it in the videophone A / V data storage unit 164. Decoding section 166 receives the videophone A / V data from videophone A / V data storage section 164, decodes it, and supplies it to A / V data selection section 178.

  The user operates a key (not shown) of the first information processing apparatus 100 as necessary to activate the high quality A / V data request unit 102. The high quality A / V data request unit 102 transmits a request for high quality A / V data to another information processing device via the transmitter of the transceiver 130. The high quality A / V data receiving unit 172 receives high quality audio / video data received from another information processing device via the transceiver 130 and stores it in the high quality A / V data storage unit 174. The high quality A / V data decoding unit 176 receives the A / V data from the videophone A / V data storage unit 164, decodes it, and supplies it to the A / V data selection unit 178.

  The A / V data selection unit 178 receives the A / V data from the A / V data buffers 106 and 122, the videophone A / V data decoding unit 166, and the high quality A / V data decoding unit 176 as necessary. This is selected and supplied to the A / V presentation unit 180. The A / V presentation unit 180 presents the A / V data to the user using a speaker and / or a display.

  FIG. 2 shows the configuration of each of the information processing devices 100 and 200 related to the A / V data communication with the second information processing device 200 having the same function as the first information processing device 100 of FIG. Indicates an element. The second information processing device 200 has the same configuration as that of the first information processing device 100. For example, an A / V data capturing unit 204 such as a camera and a microphone, and an LED display for displaying during image capturing. 205, video phone A / V data buffer unit 206, video phone A / V data resolution conversion and encoding unit 214, video phone A / V data storage unit 216, video phone A / V data transmission unit 218, high quality A / V data buffer unit 222, high quality A / V data resolution conversion and encoding unit 224, high quality A / V data storage unit 226, request reception unit 252, high quality A / V data transmission unit 228 and A / V A presentation unit 290 is provided. Components 214, 218, 224, 228 and 252 may be implemented in the form of hardware, such as an integrated circuit, or may be implemented on processor 22 according to a program stored in memory 24. Good. The processor 22 also performs other communication, control and processing as well.

  The first information processing device 100 transmits a request or the like to the second information processing device 200 through the channel 10 via the network. The second information processing device 200 transmits a response, videophone audio / video data, and the like to the first information processing device 100 through the narrow band channel 14 via the network. The second information processing device 200 transmits high quality audio / video data to the first information processing device 100 through another channel 16 via the network.

  FIG. 3 shows a communication procedure between the first information processing device 100 and the second information processing device 200.

  In FIG. 3, in step 302, the first information processing device 100 calls the second information processing device 200 via the mobile telephone network. The second information processing device 200 goes off-hook in response to an incoming call from the first information processing device 100 in accordance with a user operation or automatically. In step 304, telephone communication is started between the first information processing device 100 and the second information processing device 200 on the pair of call channels 10 and 14 by the off-hook of the second information processing device 200. . Conversely, the second information processing device 200 may call the first information processing device 100, and the first information processing device 100 may respond to the call.

  FIG. 5 shows the registration of the function information related to each device to the server 400 by the first and second information processing devices 100 and 200, and the second information processing device 200 of the communication partner by the first information processing device 100. It shows the extraction of function information. Server 400 is connected to a network such as a telephone network or the Internet. However, when the first and second information processing devices 100 and 200 are the same type of information processing device, it is not necessary to inquire or retrieve the function information.

  In step 312, the first information processing device 100 connects to the server 400 via the data channel and registers information related to the available functions of the first information processing device 100 in the server 400. Similarly, in step 314, the second information processing device 200 connects to the server 400 via the data channel and registers information related to the available functions of the second information processing device 200 in the server 400.

  In step 316, the first information processing device 100 requests the server 400 for information related to the registered available functions of another second information processing device 200 via the data channel, and in step 318, the server 400 Get it from. Similarly, another second information processing device 200 requests data relating to the registered available functions of the second information processing device 200 to the server 400 in step 317 via the data channel, and step 319. You may get it in

  In this way, the first information processing apparatus 100 and the second information processing apparatus 200 perform communication such as a videophone using the audio / video communication function of the standard that is common among the functions registered in the server 400. Start.

  The first information processing device 100 normally transmits / receives low quality audio / video data of a videophone to / from the second information processing device 200. The videophone audio / video data for a picture is a screen worth of data suitable for encoding and transmission over a telephony channel, for example at 30 second or 1 minute intervals, ie 30 second or 1 minute periods. is there. Encoding of moving images follows standards such as MPEG-4 Visual, MotionJpeg, or AVI. The encoding of still images follows standards such as jpeg, gif, or tiff. The encoding of speech follows standards such as AMR, AAC or MP3.

  The second information processing device 200 transmits low-quality audio / video data of a series of pictures to the first information processing device 100 in steps 320 to 321.

  The user of the first information processing device 100 needs to view higher quality audio / video data by viewing the low quality image and sound of the videophone transmitted from the second information processing device 200. There is. In such a case, the user activates the high quality A / V data request unit 102 by operating a key (not shown) of the first information processing device 100. In response to the request, the high quality A / V data request unit 102 of the first information processing device 100 transmits a request for capturing a high-quality image to the second information processing device 200 in step 324. Signals indicating requests and responses such as image capture are DTMF (Dual Tone Multi-Frequency) signals and 3G-324M data protocol (3GPP specifications: 3G TS26.110 “Technical Specification Group Service and System” Aspects; Codec for Circuit Switched Multimedia Telephony Service; see General description ”). The data capture request is accompanied by a recording time, audio / video data quality, encoding method, data transfer method, identification and password of the first information processing device 100, a data transfer destination address, and the like. It may be a thing.

  The request receiving unit 252 of the second information processing device 200 receives the request. When the request is acceptable, the request receiving unit 252 causes the A / V data capturing unit 204 to capture audio / video data in step 326 in response to the request. The request receiving unit 252 further stores the captured audio / video data in the high quality A / V data buffer 222, and converts the resolution to the high quality A / V data resolution conversion and encoding unit 224 in step 330. Further, for example, by turning on, for example, the LED display 205 of the second information processing device 200, the second information processing device 200 displays that the image is being captured. As described above, the video phone A / V data buffer 206 may not be provided, but only the high quality A / V data buffer 222 may be provided. In this case, when the requested high quality audio / video data is already present in the high quality A / V data buffer 222, the request receiver 252 responds to the request with a picture or 1 High quality audio / video data corresponding to a series of pictures may be selected and supplied to the high quality A / V data resolution conversion and encoding unit 224.

  In step 328, the request receiving unit 252 of the second information processing device 200 transmits a response indicating the image capture state to the first information processing device 100.

  The condition for capturing audio / video data requested from the first information processing device 100 does not match the available function of the second information processing device 200, or the received identification and password are the second information processing device. If the request is unacceptable for reasons such as not registered in 200, the request reception unit 252 transmits a rejection to the request to the first information processing device 100. When the rejection is received, the high quality A / V data request unit 102 of the first information processing device 100 displays a display signal indicating that the audio / video data cannot be received to the A / V presentation unit 180. Supply and display it.

  The high-quality A / V data request unit 102 of the first information processing device 100 turns on the LED display of the first information processing device 100, for example, in response to receiving a response indicating the state during image capture. By doing so, the display during image capture is performed.

  When the time required for high-quality audio / video data to be captured by the A / V data capture unit 204 of the second information processing device 200 has elapsed, the high-quality A / V of the first information processing device 100 When the data request unit 102 determines, the high quality A / V data request unit 102 transmits a request to end image capture to the second information processing device 200 in step 332. In response to receiving the request, the request receiving unit 252 of the second information processing device 200 ends the high-quality audio / video data capturing by the A / V data capturing unit 204, and the LED indicator 205. The display during image capture by is stopped. In step 334, the request reception unit 252 transmits a signal indicating the stop of display during image capture to the first information processing device 100. In response to receiving the signal, the request unit 102 of the first information processing device 100 stops display during image capture by the LED display 105 in the first information processing device 100.

  The high-quality A / V data resolution conversion and encoding unit 224 of the second information processing device 200 converts the resolution of the high-quality audio / video data of one captured picture as necessary, and converts the resolution. The encoded data is encoded. The high quality A / V data resolution conversion and encoding unit 224 may sequentially convert the resolution for each partial data in which high quality audio / video data is captured, and sequentially encode the converted data.

  In step 336, the A / V data transmission unit 228 of the second information processing device 200 performs steps 302 to 304 by attaching the encoded high-quality audio / video data to an e-mail, for example. And it transmits to the 1st information processing apparatus 100 via the channel different from the channel used by 320-334, for example via the internet. However, although the transmission time becomes longer, the encoded high-quality audio / video data may be transmitted on the narrowband channel used in steps 302 to 304 and 320 to 334.

  As an alternative configuration, the high-quality audio / video data is uploaded or transferred by the second information processing device 200 to another information processing device or device 300 of a specified destination such as a file server connected to the network, The first information processing device 100 may download or receive from another information processing device. The high quality audio / video data may be transferred to a plurality of destination information processing devices 300 specified by the first information processing device 100. The destination or those destinations are included in a control signal transmitted from the first information processing device 100 to the second information processing device 200.

  In general, the process for transferring high quality audio / video data preferably has a short time between being requested and transmitted. However, in order to shorten the transmission time of the entire high-quality audio / video data and to transmit at the maximum capacity of the available transmission band, that is, in a wider band, the information processing device of the designated destination after the videophone call is terminated. May be sent to.

  The high quality A / V data receiving unit 172 of the first information processing device 100 receives the high quality audio / video data and stores it in the high quality A / V data 174. The high quality A / V data decoding unit 176 extracts the audio / video data from the high quality A / V data storage unit 174, decodes it, and supplies it to the A / V data selection unit 178. The A / V data selection unit 178 supplies the decoded audio / video data to the A / V presentation unit 180.

  FIG. 4 is a modification of the communication procedure of FIG. 3 and shows another communication procedure between the first information processing device 100 and the second information processing device 200. In FIG. 4, steps 312 to 319 in FIG. 3 executed via the server 400 are changed to steps 306 to 308 executed between the first and second information processing devices 100 and 200 without going through the server 400. Has been replaced.

  In step 306, the first information processing device 100 transmits an inquiry about information regarding the function of the second information processing device 200 to the second information processing device 200. The second information processing device 200 transmits information regarding the function of the second information processing device 200 to the first information processing device 100. The first information processing device 100 receives information related to the function of the second information processing device 200 from the second information processing device 200. Similarly, the second information processing device 200 may also receive information regarding the function of the first information processing device 100 from the first information processing device 100.

  FIG. 6A shows an example of transmission of high quality audio / video data from the second information processing device 200 to the first information processing device 100. In this case, both the first and second information processing devices 100 and 200 are mobile phones. In steps 320 to 321, the second information processing device 200 sequentially transmits low-quality moving image data of a series of picture videophones to the first information processing device 100. In step 324, the first information processing device 100 transmits a request for a high-quality still image to the second information processing device 200 in response to a user operation. The second information processing device 200 transmits a response to the first information processing device 100 in step 328, and in step 336, the encoded high quality still image corresponding to the low quality moving image data of the videophone is transmitted. Transmit to the first information processing device 100.

  FIG. 6B shows an example of transmission of high-quality monitoring audio / video data from the second information processing device 200 to the first information processing device 100. In this case, the first information processing device 100 is a mobile phone, and the second information processing device 200 is a surveillance camera disposed in the home. In steps 320 to 321, the second information processing device 200 transmits a low-quality moving image of a videophone of a series of pictures to the first information processing device 100. In step 324, the first information processing device 100 transmits a request for a high-quality still image to the second information processing device 200 in response to a user operation. In step 336, the second information processing device 200 transmits the encoded high quality still image corresponding to the low quality moving image data of the videophone back to the first information processing device 100. The second information processing device 200 may transmit a high-quality still image to a plurality of mobile phones of a plurality of related users including the first information processing device 100 for monitoring.

  The embodiments described above are merely given as typical examples, and variations and variations thereof will be apparent to those skilled in the art. Those skilled in the art will depart from the principles of the present invention and the scope of the invention described in the claims. Obviously, various modifications of the above-described embodiment can be made.

Claims (9)

An apparatus for receiving audio and / or video data using mobile radio communications,
Receiving means for receiving encoded low-quality and / or high-quality audio and / or video data from another device using a predetermined channel over a network;
Decoding means for decoding the received audio and / or video data according to the quality and reproducing the audio and / or image;
Presenting means for presenting the reproduced sound and / or image according to its quality;
Control means for transmitting a control signal for controlling the another device to the other device;
With
During or after the receiving means receives low quality audio and / or video data from the other device and the presentation means presents low quality audio and / or images reproduced by the decoding means In response to a user operation, the control means sends a request for capturing high-quality audio and / or video data corresponding to the low-quality audio and / or video data via the network. all SANYO to be transmitted to said another apparatus,
The receiving means further receives the encoded high quality audio and / or video data on a channel wider than the predetermined channel for receiving the encoded low quality audio and / or video data. Ru der configured to receive,
apparatus. An apparatus for transmitting audio and / or video data using mobile radio communication,
Capture means for capturing audio and / or video data;
Encoding the captured audio and / or video data by converting the resolution and encoding according to the required quality to produce encoded low and / or high quality audio and / or video data Means,
Transmitting the encoded low-quality audio and / or video data on a first channel to another device via a network and on a second channel having a wider bandwidth than the first channel via the network Transmitting means for transmitting the encoded high quality audio and / or video data;
Control means for controlling the encoding means in accordance with a control signal from the other device;
With
During or after the transmitting means transmits the low quality audio and / or video data to the another device, the control means is responsive to a control signal from the another device to control the low quality High quality audio and / or video data corresponding to audio and / or video data is captured by the capturing means, and the captured high quality audio and / or video data is encoded by the encoding means. And transmitting the encoded high-quality audio and / or video data to the transmission means on the second channel,
apparatus. The low-quality audio and / or video data is transmitted in a narrow band channel, audio and / or video data of the high quality is intended to be transmitted in a wide band of channels, according to claim 2 . The apparatus according to claim 2 , wherein the transmitting means transmits the encoded high-quality audio and / or video data to the another apparatus. The transmitting means sends the encoded high quality audio and / or video data to the third device according to a destination of a third device different from the other device included in the control signal. The device according to claim 2 , wherein the device transmits. A program for an information processing apparatus that receives audio and / or video data using mobile wireless communication,
Using the first channel via a network from another device, a first receiving step of receiving a low-quality coded audio and / or video data,
A second receiving step of receiving encoded high quality audio and / or video data from the other device over a network using a second channel that is wider than the first channel;
Decoding the received audio and / or video data according to its quality and reproducing audio and / or images;
Presenting the reproduced audio and / or image according to its quality;
In response to a user action during or after low quality audio and / or video data received from the other device is decoded and low quality voice and / or images are presented, Sending a request for capturing high quality audio and / or video data corresponding to the low quality audio and / or video data to the other device via the network;
A program that can run to run. A program for an information processing apparatus that transmits audio and / or video data using mobile wireless communication,
Capturing audio and / or video data;
Encoding the captured audio and / or video data to produce encoded low quality audio and / or video data;
Encoding the captured audio and / or video data to produce encoded high quality audio and / or video data;
Transmitting the encoded low quality audio and / or video data on a first channel to another device over a network;
Corresponding to the low quality audio and / or video data according to a control signal from the another device during or after transmitting the low quality audio and / or video data to the another device Capturing high quality audio and / or video data;
Encoding the captured high quality audio and / or video data;
Transmitting the encoded high quality audio and / or video data over a second channel that is wider than the first channel over the network;
A program that can run to run. A method of transmitting audio and / or video data using mobile radio communication in an information processing system, comprising:
Capturing audio and / or video data;
Encoding the captured audio and / or video data to produce encoded low quality audio and / or video data;
Encoding the captured audio and / or video data to produce encoded high quality audio and / or video data;
Transmitting the encoded low quality audio and / or video data on a first channel to another device over a network;
Corresponding to the low quality audio and / or video data according to a control signal from the other device during or after transmitting the low quality audio and / or video data to the another device Capturing high quality audio and / or video data to
Encoding the captured high quality audio and / or video data;
Transmitting the encoded high quality audio and / or video data over a second channel that is wider than the first channel over the network;
Including methods. A system for transmitting audio and / or video data from a second device to a first device using mobile radio communications, comprising:
The first device includes:
In the first channel through the network from the second device, a first receiving means for receiving the low quality coded audio and / or video data,
Second receiving means for receiving encoded high quality audio and / or video data from the second device over the network on a second channel that is wider than the first channel;
Decoding means for decoding the received audio and / or video data according to the quality and reproducing the audio and / or image;
Presenting means for presenting the reproduced sound and / or image according to its quality;
First control means for transmitting a control signal for controlling the second device to the second device;
With
The second device includes:
Capture means for capturing audio and / or video data;
Encoding means for generating encoded low quality and / or high quality audio and / or video data from the captured audio and / or video data;
Transmitting the encoded low quality audio and / or video data on the first channel to the first device via the network and the encoding on the second channel via the network Means for transmitting the high quality audio and / or video data that has been transmitted;
Second control means for controlling the encoding means in accordance with a control signal from the first device;
Including
The second device transmits the encoded low quality audio and / or video data to the first device;
During or after the encoded low quality audio and / or video data is decoded and low quality voice and / or images are presented in the first device, the first In response to a user operation, a device sends a request for capturing high-quality audio and / or video data corresponding to the low-quality audio and / or video data via the network to the second. To the device
The second device captures and encodes high quality audio and / or video data corresponding to the low quality audio and / or video data according to the request from the first device. Transmitting high quality audio and / or video data on the second channel via the network;
system.

Images