Complex-subband transform for subband-based motion estimation/compensation and coding
Cheng-Chang Lien, Chung-Lin Huang, Jhy-Gau Chen · IEEE Transactions on Image Processing · 1997
This paper introduces the complex subband transform (CST) that can be applied for both subband signal decomposition and motion estimation, which are the two major processes in subband-based image sequence coding. In the experiments, we compare the CST-based subband motion compensation with conventional block matching motion compensation, and find that the former has (i) higher peak signal-to-noise ratio (PSNR) of the reconstructed images and (ii) lower prediction error entropy of the motion vectors.