Error Resilient H.264 Video Encoder with Lagrange Multiplier Optimization Based on Channel Situation

To achieve an optimum transmission over a noisy wireless channel, both the source coding and network should be jointly adapted. An acceptable video quality in wireless environ‐ ment can be obtained by the adjustment of parameters in video codec and wireless network. For the former, people have proposed many error resilient video encoding algorithms to en‐ hance the robust performance of the compressed video stream in wireless networks. These algorithms can be divided into three categories: 1) error detection and error concealment al‐ gorithms used at video decoder of wireless receiver; 2) error resilient video encoding algo‐ rithms located at video encoder of wireless transmitter; 3) robust error control between video encoder and decoder based on 1) and 2). Fig.1 summarizes different techniques at dif‐ ferent parts of a wireless video transmission system.