A Rate Distortion-Based Network Coding Design for Video Transmission

In the process of video transmission, packets loss may lead to the reconstruction distortion. When network coding is used for video transmission, the original error will cause propagation in the following nodes. To reduce the impact of error propagation, a random linear network coding (RLNC) based on the rate distortion is proposed to realize reliable video transmission. The method finds out the optimal rate allocation through rate distortion calculation to minimize the impact of packet loss. In addition, it adopts non-strict lower triangular global coding matrix (GCM) to prevent from declining of reconstructed quality of video caused by the insufficient rank in the GCM at the decoder. Theoretical analysis and simulation results show the correctness and effectiveness of the method.