Sending and receiving devices of video communication system, and sending and receiving method thereof

Abstract

The invention discloses a video communication system and method with a reliable mechanism, which respectively adds a first error check module and a second error check module to the sending and receiving devices of prior video communication system, and makes corresponding changes combining sending and receiving method of prior video communication system, that is: the first error check module adds error check code to encoded video frame, then the sending module divides the video frame with added error check code and packs the video frame into a plurality of video frame data packs and a plurality of error check code data packs, and sends the packs in network; the second error check module passes the receiving module received data packs from network to QoS module for buffering, and then the second error check module tests error check processing, uses corresponding error check code to recover the lost or error video frame data packs, and removes error check data packs if the video frame data pack is integral, then combines and reverts the video frame data pack into video frame, finally video images with excellent effection are outputted by image output device.

Description

technical field [0001] The present invention relates to the field of multimedia communication, in particular to a video communication system and method thereof. Background technique [0002] Currently, a video conference system includes a sending device and a receiving device. Such as figure 1 As shown, the sending device includes an image acquisition module 1, a video encoding module 2, a sending module 4 composed of an RTP (real-time transport protocol) submodule and a UDP (user datagram protocol) submodule; as figure 2 As shown, the receiving device includes a receiving module 6 , a QoS (Quality of Service) module 7 , a video decoding module 9 and an image output device 10 . Wherein, the image acquisition module 1 outputs the original image collected by it to the video encoding module 2, and the original image is encoded by the video encoding module 2, and converted into a video frame and output to the sending module 4, and the RTP sub-module of the sending module 4 F...

AI Technical Summary

Problems solved by technology

However, the packet loss problem is not solved. The video frame is divided into several data packets for transmission on the network. Even if one data packet is lost, a complete video frame cannot be formed, causing multiple data packets to fail, especially the I frame (i.e. The first frame of image encoding, which is also the key frame of the image, is moderately compressed and used as a reference point for random access, which can be used as an image) The impact of packet loss is very large

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