The Research Of AVS-M Encoder And Optimization Of The Decoder

AVS (Audio Video Coding Standard)is the standard of video and audio designed by our country. Seven parts of AVS–Mobile Video (AVS-M) is designed for compressing moving images of digital storage, network stream, multimedia communication.In this paper the background and the status of the research are analyzed firstly. Several algorithms of the choice of macro block partition modes and methods of DSP optimization are showed briefly.Then structure and algorithms of the AVS-M encoder and decoder are analyzed .In the encoder, the vision model is used in the algorithms of the choice of macro block partition modes. The fast algorithm is applied in encoder on PC ,the speed has been improved by 53% and the effect is good.Then the decoder source code-wm2.4 is repotted on TMS320C6416 DSP . The optimizations of C code, assembly language , storage space and the structure of interpolation algorithm are used to the decoder, and the results of every method of optimization have been got. As to QCIF the final result is three times as fast as the repotted one. It has met the real time need.