JP2006128997A5 - - Google Patents

Claims (21)

A transmission device for transmitting data based on video or audio signals to a receiving side,
Transmission characterized in that the encoding parameter of the video or audio signal is set based on the reception status of the receiving means for receiving the data acquired from the receiving side and the output status of the output means for outputting the data apparatus.   The transmission apparatus according to claim 1, wherein the output status is a display screen size based on the data of the output unit.   The transmission apparatus according to claim 1, wherein the output status is information that uniquely specifies an output capability of the output unit or an output device used for the output unit.   The output status is an instruction on the receiving side, and includes an instruction including a request to increase / decrease the frame rate of data output by the output unit or a request to increase / decrease the capture size of the data. The transmission device according to claim 1, wherein   The transmission apparatus according to claim 1, wherein the output status is an instruction on the reception side, and is a request to increase / decrease the number of display colors of data output by the output unit.   6. The network according to claim 1, wherein the reception status is an effective bandwidth of a network calculated based on packet loss information or delay time information received at the receiving side. Transmitter device.   The setting of the encoding parameter is set with reference to data associating the output status or the reception status with the encoding parameter of the data. The transmission device according to item. Means for encoding the video signal; and frame data size measuring means for measuring a data size for each frame of the data;
8. The transmission apparatus according to claim 1, wherein an encoding parameter for encoding the video signal is set based on a measurement result of the frame data size measurement unit. Input device detecting means for detecting an input device of the video signal; and means for encoding the data;
The encoding parameter for encoding the video signal is set based on the detected relationship between the image variation of the input device and the frame rate, according to any one of claims 1 to 8. The transmitting device described.   The transmission apparatus according to claim 9, further comprising: a plurality of input terminals corresponding to devices, wherein the input device detection unit specifies an input device based on a connection location of the input terminals.   The program which operates a computer in order to perform the function of the transmitter of any one of Claim 1- Claim 10.   The computer-readable recording medium which recorded the program of Claim 11.   A receiving device that receives the data according to any one of claims 1 to 10 and has output means, wherein the output status and the receiving status are transmitted to the transmitting device. Receiving device.   A program for operating a computer to execute the function of the receiving device according to claim 13.   A transmission / reception apparatus comprising both means as a transmission apparatus according to any one of claims 1 to 10 and means as a reception apparatus according to claim 13.   A transmission system comprising: the transmission device according to any one of claims 1 to 10; and the reception device according to claim 13. A transmission method for transmitting video or audio data to a receiving side,
Transmitting video or audio data to the receiving side based on an initial value of an encoding parameter;
Obtaining reception-side data relating to the reception status of the receiving means for receiving the data and the output status of the output means for outputting the data;
Updating the encoding parameters based on the receiver data;
Transmitting video or audio data encoded based on the updated encoding parameter. A method of transmitting data on a receiving side to a transmitting side that transmits video or audio data,
Receiving video or audio data from the transmission side based on the initial value of the encoding parameter;
A reception method comprising: transmitting reception side data relating to a reception state of the received video or audio data and an output state of an output means for outputting the data to the transmission side. A video input unit for receiving a video signal from the video input device;
A video encoding unit that performs digital encoding of video signals and compression of encoded data;
A network interface for communicating with an external video receiver;
A display mode information acquisition unit that analyzes the display mode information acquired from the received data and extracts an instruction to change the video display size and motion priority of the receiving device, and is detected by the receiving device by analyzing the network information acquired from the received data A network information acquisition unit that extracts a packet loss rate, a delay time, and the like; an effective bandwidth calculation unit that calculates an effective bandwidth of a transmission / reception period from a packet loss rate, a delay time, and the like of the reception device; An analysis unit for obtaining the situation of the receiving side including
And a coding parameter switching unit that switches a coding parameter of the video or audio encoder based on the analysis of the analysis unit. Furthermore, a voice input unit that receives a voice signal from a voice input device;
The transmission apparatus according to claim 19, further comprising: an audio encoding unit that performs digital encoding of the audio signal and compression of encoded data.   21. The transmission apparatus according to claim 19, further comprising synchronization means for synchronizing between the transmission apparatus and the reception apparatus.