Title :
Overlapped motion compensated region wavelet coder for very low bit-rates
Author :
Xudong, Zhang ; Wang Deshang ; Yingning, Peng ; Yuan, Lili ; Mark, Raymond
Author_Institution :
Dept. of Electron. Eng., Tsinghua Univ., Beijing, China
Abstract :
We propose a new video coding scheme based on four improvements. (1) Half pixel precision is used for the overlapped motion compensation. (2) Region wavelet decomposition is only applied to the significant region in the prediction error image (displacement frame difference, DFD). (3) Zerotree is used for representation of the significant region wavelet coefficients. (4) A quantization model based on the human visual system (HVS) have been used for intraframe coding. Simulation results show that some coding gain has been reached compared to the conventional wavelet coder
Keywords :
image representation; image segmentation; motion compensation; prediction theory; transform coding; video coding; visual perception; wavelet transforms; coding gain; displacement frame difference; half pixel precision; human visual system; intraframe coding; overlapped motion compensation; prediction error image; quantization model; region wavelet coefficients representation; region wavelet decomposition; simulation results; very low bit rates; video coding; wavelet coder; zerotree; zerotree representation; Design for disassembly; Humans; Image coding; Motion compensation; Pixel; Predictive models; Quantization; Video coding; Visual system; Wavelet coefficients;
Conference_Titel :
Signal Processing, 1996., 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
0-7803-2912-0
DOI :
10.1109/ICSIGP.1996.567258
