Realization and optimization of video encoder based on TMS320C6455 DSPs

In view of serious cache missing of each macro block of MPEG-4 (Moving Picture Experts Group-4) video encoder in transmission and the video sequence frame rate is low, We proposed the motion estimation algorithm optimization, Cache optimization, SAD ( Sum of Absolute Difference) and pixel interpolation optimization, data removal using EDMA (Extended Direct Memory Access) , and it has enhanced memory speed and realized the MPEG-4 video encoder optimization on TMS320DM6455 DSP platform. The performance of the video encoder is evaluated, the experimental result proved that the image and the video processing function computing speed increase 17.18~139.98 times and the coding efficiency is improved eleven times at least, and the research results can be used to real time video communication for more than 25 frames per second.