充分减小树间冗余的优化三维VSPIHT视频编码方法

Optimal 3D-SPIHT Video Coding Method by Reducing Redundancy between Trees

用 3D- DWT及 3D -SPIHT算法获得高压缩率的视频编码近年来受到人们的关注 ,在现有算法的基础上 ,提出一种优化的 2D&MT 3D- VSPIHT方法 该方法尽可能地消除了树间冗余 ,改进了编码的每一个细节 ,有效地减少了SPIHT算法中的冗余扫描 ,合理地处理了最低频子带系数 实验结果证明 ,在同样的压缩倍数下 ,编解码后视频图像的PSNR比现有的三维SPIHT方法高 1～

In recent years, 3D-DWT and 3D-SPIHT coding method with high compression ratio draws the interest of professionals. This paper proposes an optimizing 3D-SPIHT coding scheme based on the existing algorithm. The method sufficiently reduces the redundancy between trees, improves the fine detail in coding process, effectively reduces the scan time in SPIHT, and combines more wavelet coefficients together in high sub-bands and reasonably organizes those in the lowest sub-band so that the compression performance is improved. Simulation results show that, under the same compression ratio, the quality of the video produced by our method is better than the existing methods in about 1～5?dB (PSNR).