三维小波变换结合运动补偿的视频编码器  

Video Coder Based on 3-D Wavelet Transform and Motion Compensation

作　　者：俞静[1] 覃团发[1] 区骋 

机构地区：[1]广西大学计算机与电子信息学院,南宁530004 [2]广西壮族自治区邮电规划设计院,南宁530012

出　　处：《电讯技术》2006年第3期66-69,共4页Telecommunication Engineering

基　　金：广西科学研究与技术开发计划资助项目(桂科攻0330010-1);广西"新世纪十百千人才工程"专项资金资助项目(2002222)

摘　　要：对三维小波变换结合运动补偿的视频压缩算法提出了改进方案。针对运动补偿提升(MCLIFT)框架的弱点,结合MPEG的特点,采用新的帧结构对视频序列进行帧间滤波去除时间冗余,再对每个帧在空间上进行小波分解并用SPIHT算法对小波系数进行编码。实验表明,此方法继承了MCLIFT框架的优点,同时又减少了时延和所需的帧缓存,而且这种与MPEG相似的帧结构能进一步降低码率,提高压缩比。A new improved scheme is present based on three dimensional wavelet transformation with motion compensation. First, according to the weakness of the motion compensated lifting （MCLIFT） scheme and the characteristic of MPEG, a new frame structure is used in frame to frame filtering to wipe off temporal redundancy. Then, 2 -D spatial wavelet decomposition is used in each frame, and the wavelet coefficients are encoded with SPIHT algorithm. Simulations demonstrate that this method inherits the advantage of MCLIFT scheme while the time delay and buffer memory is decreased. The frame structure similar to MPEG makes decreasing bit rate and improving compression ratio possibly.

关 键 词：视频编码器 三维小波变换 运动补偿 运动补偿提升 

分 类 号：TN919.8[电子电信—通信与信息系统] TN762[电子电信—信息与通信工程]