Video coding using wavelet transform, windowed motion compensation, and conditional entropy coding

Ulrik Hindo; Susanne Schjorring

doi:10.1117/12.185892

16 September 1994 Video coding using wavelet transform, windowed motion compensation, and conditional entropy coding

Ulrik Hindo, Susanne Schjorring

Proceedings Volume 2308, Visual Communications and Image Processing '94; (1994) https://doi.org/10.1117/12.185892
Event: Visual Communications and Image Processing '94, 1994, Chicago, IL, United States

Abstract

In this paper a video coding scheme is presented which is a hybrid coding scheme tailored to suit the wavelet transform. Using conventional block based motion compensation introduces blocking effects in the prediction error signal which are expensive to code when using a wavelet transform. Therefore a windowed motion compensation using overlapping blocks is used to smooth out transitions between blocks. A method for coding the quantized wavelet coefficients is presented. The positions of non-zero coefficients are coded using conditional entropy coding. The method exploits the correlation between coefficients inside a subband as well as between coefficients in different subbands. Simulation results are given for different prediction methods and different methods to code the quantized wavelet coefficients when coding an R.601 signal to 4 Mbit/s.

Citation Download Citation

Ulrik Hindo and Susanne Schjorring "Video coding using wavelet transform, windowed motion compensation, and conditional entropy coding", Proc. SPIE 2308, Visual Communications and Image Processing '94, (16 September 1994); https://doi.org/10.1117/12.185892

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