JOINTLY OPTIMAL REGION-CLASSIFIED ADAPTIVE VECTOR QUANTIZATION FOR VERY-LOW BIT-RATE VIDEO CODING

In this paper, a video coding algorithm suitable for the very low bit rate video coding system is presented. It takes advantage of the prior knowledge of the image type to segment the image to different regions , then codes each region with different coding criterion and method ac cording to the different importance. An adaptive region-classified vec tor quantization strategy is exploited in this algorithm also. With se gmentation of the frame and high correlation between frames, better co debooks of vector quantization are constructed to improve the quality. According to the simulation results, acceptable quality at about 10 k bits per second can be obtained for the typical test sequences.