Analysis on Quantization Error Propagation for Motion-Compensated Lifted Wavelet Video Coding
Chuo-Ling Chang, Aditya Mavlankar, Bernd Girod · 2005
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