A Robust Video Transmission Method for Joint End System and Relay Node Network Coding

Abstract

The invention discloses a robust video transmission method combined with network coding on an end system and a relay node. An unequal protection algorithm of scalable video coding, a prioritization partition method of scalable code streams, an interleaving and packaging algorithm of video streams and a video quality distortion model are designed, and the video quality distortion model is optimized and solved to obtain an optimal redundancy allocation scheme. A sending end adds proper redundancy on a compression source stream to be transmitted through random linear network coding, and the reliability of video transmission is ensured from the angle of the end system. The relay node reduces energy consumption of network bandwidth resources, and improves efficiency of the video transmission and mistake-resisting performance through the random linear network coding. The robust video transmission method ensures that a receiving end can obtain layered code streams according to the sequences of importance of the scalable code streams, improves the quality of the video transmission, and can adapt to requirements for band widths, computing power and resolution ratios of different terminals in the network.

Description

technical field [0001] The present invention applies random linear network coding technology to the unequal protection of scalable video transmission, and designs a reasonable network coding strategy at the end system and relay nodes to solve the adverse effects of network packet loss on video transmission, thereby improving Reliability and efficiency of video transmission. Background technique [0002] With the development of network technology, on the one hand, video applications on the network are more and more popular and concerned by people; on the other hand, most networks work in the environment of packet loss, and there is no quality of service guarantee; and video transmission A key issue is to maintain the quality of video service at an acceptable level. Therefore, how to provide reliable, efficient and scalable real-time video streaming over unreliable networks is of great significance and faces many challenges. [0003] For real-time video stream transmission, t...

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Problems solved by technology

Literature [3][4][5] explored the joint design method of network coding and application layer FEC applied to video multicast communication, implemented FEC and network coding in the end system and relay node respectively, and the receiving end according to the The parity check matrix of RS coding and the linear network coding and decoding matrix are decoded twice to complete the restoration of the source video, which improves the reliability of video transmission, but does not consider the complexity of coding, optimization, and changing quality of service.

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