Optimization and implementation of MPEG-4 video encoder and decoder system based on DM642

To implement MPEG-4 video encoder and decoder system based on TMS320DM642,the system design scheme and implementation flow framework are presented.The video capture and input module,video encoding and decoding processing module,video output and display module are implemented.The whole optimization techniques are proposed based on the hardware characteristics of DM642.The techniques of program flow adjustment,C language code optimization,linear assembly code optimization,distribution of memorizer space and EDMA transfers are used to improve the code parallelism and running speed.Finally,MPEG-4 real-time video encoder and decoder are implemented through the optimization techniques based on DM642.At present,the encoder and decoder can deal with CIF format video sequences at the speed of more than 25fps,and can be applied to the real-time video surveillance system.