一种极低码率视频压缩编码算法的VLSI结构  

VLSI Architecture for a Very Low Bitrate Video Coding

作　　者：江科[1] 章倩苓[1] 汤庭鳌[1] 

机构地区：[1]复旦大学专用集成电路与系统国家重点实验室,上海200433

出　　处：《电子学报》1999年第11期53-56,共4页Acta Electronica Sinica

摘　　要：本文提出了一种基于分类矢量量化的极低码率视频编码算法及其VLSI结构,它结合了四叉树分割,分类矢量量化算法,变块大小运动估计等多种算法.在获得较高压缩率同时,又克服了低码率图像编码算法中常见的边缘细节模糊的缺陷.同时,本算法在保留了矢量量化解码器简单的优点的同时,并给出了一种易于VLSI实现的编码器结构.其中运动估计电路可和矢量量化器共用处理器阵列,从而减少了编码器的电路规模.A new very low bitrate video compress algorithm based on Vector Quantization is presented in this paper.The proposed approach involves quadtree segmentation,classified Vector Quantization and variable size motion compensation simultaneously.Simulation result shows that this algorithm achieves good subjective image quality while gets high compression ratio.Considering the simple structure of the decoder,here we prsent an encoder architecture which is suitable for VLSI implementation.In this architecture,the motion estimation can share the same Process Array with Vector Quantization in order to reduce the chip area.

关 键 词：极低码率 视频编码 矢量量化 VLSI结构 

分 类 号：TN941.4[电子电信—信号与信息处理] TN470.3[电子电信—信息与通信工程]