Analysis on Quantization Error Propagation for Motion-Compensated Lifted Wavelet Video Coding
Analysis on Quantization Error Propagation for Motion-Compensated Lifted Wavelet Video Coding
复制标题
运动补偿提升小波视频编码的量化误差传播分析
DOI：
10.1109/mmsp.2005.248607
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
B. Girod
中科院分区：
文献类型：
--
作者：
Chuo;Aditya Mavlankar;B. Girod
在小波视频编码中，时间子带的量化误差通过时间小波合成传播到重构帧中。我们通过考虑运动补偿中空间插值对量化误差统计的影响来分析这种传播。在此基础上，引入了一种由运动场导出的失真模型，并将其纳入到一种速率分配方法中，以减少帧间的质量波动。与忽略运动补偿影响的传统分配方法相比，在平均质量损失最小的情况下，显著降低了质量波动
In wavelet video coding, the quantization error in the temporal sub-bands propagates through temporal wavelet synthesis to the reconstructed frames. We analyze this propagation by considering the impact of the spatial interpolation in motion compensation on the statistics of the quantization error. Based on the analysis, a distortion model that can be derived from the motion fields is introduced and incorporated into a rate allocation method aiming at reducing the quality fluctuation over frames. Comparing to the conventional allocation method that ignores the effect of motion compensation, significant reduction in quality fluctuation is observed while incurring minimal loss in the average quality