Method of transmitting video data and transmission system thereof

Abstract

The method is designed for use in a video communication system comprising video signal send end, relay server and receiving end. The relay server buffers the video frames from the sending end; when receiving each request message, the relay server sends the first one of received video frames to the receiving end. The invention also reveals a video signal transmission system. The invention can avoid the congestion at air interface of mobile network due to insufficient bandwidth.

Description

technical field [0001] The invention relates to the technical field of multimedia communication, in particular to a video data transmission method and a transmission system thereof. Background technique [0002] At present, it has become one of the basic services that the existing instant messaging software can provide by using the camera equipment (such as a camera) on the PC terminal to realize the video communication between the PC terminal users based on the computer network, so that the communication parties can communicate visually. However, with the vigorous development of mobile communication technology, especially the introduction of 3G technology, the processing capability of mobile terminals and the transmission bandwidth of mobile networks have been greatly improved, so that the connection between PC terminals and mobile terminals, as well as between mobile terminals and mobile terminals, has been greatly improved. It becomes possible to carry out real-time visua...

AI Technical Summary

Problems solved by technology

[0008] Due to the limitation of the transmission bandwidth of the air interface of the mobile network, when multiple senders send data frames to a receiver at the same time, the transmission data of the receiver may be congested due to the limitation of the transmission bandwidth of the air interface, which may affect To the stability and real-time performance of video communication

[0009] At the same time, in the process of implementing video communication in the existing mobile communication network, mobile terminals generally use the Moving Picture Experts Group (MPEG, Moving Picture Experts Group) codec protocol to codec the video data. The encoding and decoding process stipulated in the agreement is relatively complicated, and the encoding and decoding process implemented by using the MPEG protocol will occupy more processing power resources of the terminal, so these characteristics of the MPEG agreement are actually not very suitable for the encoding and decoding processing of video data by mobile terminals

[0010] In addition, in the process of video communication between PC terminals based on computer networks, Real-Time Transport Protocol (RTP, Real-Time Transport Protocol) and Real-time Transport Control Protocol (RTCP, Real-time Transport Control Protocol) are generally used for transmission. Video data frames, but because the RTP / RTCP protocol is generally more suitable for video communication in computer networks, it is not fully applicable for mobile network systems

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