具有可扩展性的3D子带视频编解码系统  

3D Subband Codec with Full Scalability

作　　者：房胜[1] 钟玉琢[2] 

机构地区：[1]山东科技大学计算机科学与技术系,山东泰安271019 [2]清华大学计算机科学与技术系,北京100084

出　　处：《小型微型计算机系统》2005年第7期1260-1263,共4页Journal of Chinese Computer Systems

摘　　要：在异构网络中进行的多媒体传输要求视频压缩系统具有高度的调节变换能力,也就是说具有可扩展性.可扩展性是指对码流可以进行部分解码,解码获得的重构视频的质量与接收到的信息量成比例变化.为了获得视频流的高度可扩展性-包括时域,空域和质量,提出了基于SPIHT编码原则的扩展优先扫描的方法来组织时域空域系数的位平面比特流,并设计和实现了一个基于2D+t小波变换的视频编解码系统.该系统可以获得具有高度可扩展性的视频流.Over heterogeneous networks the multimedia transmissions are required more flexibility in video codec. That is to say video codec should have scalability. Scalability is referred to that the encoded bitstream can be decoded partly and the reconstruction video quality is proportional to the received amount of information. In order to get the full video scalability-including in temporal, spatial and PSNR, this paper proposed a method of scanning order for scalability based on SPIHT principles to organize the spatiotemporal coefficients to a embedded bitstream of bitplane. A video codec based on 2D+t subband wavelet analysis were designed to get a embedded bitstream with full scalability.

关 键 词：可扩展性 小波变换 SPIHT 视频编解码 

分 类 号：TP393.03[自动化与计算机技术—计算机应用技术]