Rate Control And Network Transmission Based On H.264/AVC

H.264/AVC is a newest video compression standard accepted by ITU-T and ISO/IEC. Compared with the existed video coding standards, H.264/AVC gets obvious improvements in the condition of the same visual quality and also has better network adaptation. It can realize video coding in the high quality and low bit rate.This thesis analyzed video coding standards and the state of domestic and foreign research, concluded and introduced the MPEG series standards and the H series standards, put the main emphasis on studying the encoding and decoding framework of H.264/AVC and its technical features. Simulation results shows that these features improve the performance of video encoding and have reference value for achieving network transmission.This thesis analyzed and simulated the classical and H.264/AVC rate control algorithm, then put the main stress on researching the basic unit rate control algorithm of H.264/AVC, improved on the algorithm in the aspect of target bit rate of the basic unit and the distinct difference of MarcoBlocks in the same basic unit. Simulation results indicate that the new algorithm can control the target bit rate more accurately and effectively the video coding quality.Finally, this thesis describes the characteristics of wireless channel and new features of H.264/AVC which is adopting network transmission. A whole Rate-Distortion Model adopting the wireless transmission was proposed to be aimed at the Rate-Distortion Optimized Model which not includes the channel distortion in H.264/AVC. The model was modified based on the intra/inter mode decision scheme. Simulate results show that the new algorithm enhances the robust of video transmission in the wireless network.