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根据 MPEG- 4对多媒体信息描述的新压缩标准 ,在深入研究尺度小波变换和嵌入式小波零树压缩编码原理的基础上 ,探讨了两种基于小波零树编码的具有连续分辨率的改进视频编码方法 .尺度小波零树编码将低通子带独立编码、其它子带多尺度零树熵编码 ,实现了自然 /合成视频信息的空间 /质量尺度完全可调 .尺度自适应运动补偿小波算法运用自适应步长来减少暂时冗余 ,保证了变码率下的视频传输质量 .
According to the new compression standard described by MPEG-4 for multimedia information, based on the study of the principle of scale wavelet transform and embedded wavelet zerotree compression coding, two kinds of improved video coding with continuous resolution based on wavelet zerotree coding The scale wavelet zerotree coding can encode the low-pass sub-band independently and the other sub-band multi-scale zerotree entropy coding, so that the space / quality scale of the natural / synthetic video information can be completely adjusted. Scale adaptive motion compensation wavelet algorithm Self-adaptive Adapt to the step size to reduce temporary redundancy and ensure the video transmission quality under variable bit rate.