To obtain a high level of quality when coding a TV color video signal with a high compression rate, the spatial subband decomposition and the differential coding with motion compensation and psychovisual quantization have been previously successfully used for coding a color television sequence at a rate of 10 Mbit/s. However these techniques are not sufficiently efficient to achieve the objective of a rate of 5 Mbit/s without any significant reduction of the spatial resolution and of the quantification quality. We present a subband coding method which allows the user to simultaneously maintain the full spatial resolution and the quantization quality. This method is based on a frame skipping algorithm; it primarily uses motion compensation techniques for the interpolation of non coded frames and the prediction of coded frames and secondarily a spatial subband decomposition of the prediction error before a coding step which uses a set of visually optimized scalar quantizers -- the quantization in the spatial frequency domain is adapted to the visual perception by incorporating some important aspects of the human visual system (frequency dependence and masking).

Date Published: 22 October 1993
PDF: 9 pages
Proc. SPIE 2094, Visual Communications and Image Processing '93, (22 October 1993); doi: 10.1117/12.157907

Published in SPIE Proceedings Vol. 2094:
Visual Communications and Image Processing '93
Barry G. Haskell; Hsueh-Ming Hang, Editor(s)