Title :
Vector quantization based on visual masking functions for the DPCM and HDPCM coding of coloured pictures
Author :
Lameillieure, J. ; Bruyland, I.
Author_Institution :
State Univ. of Gent, Belgium
Abstract :
In DPCM (differential pulse code modulation) or HDPCM (hybrid DPCM) of coloured pictures consisting of three components, every component can be coded with three separate coders, each containing a scalar quantizer. However, more compression can be obtained with one vector quantizer instead of three scalar quantizers. In the article, the attention is focused on the placement of the output vectors in the two-dimensional prediction error plane using visual masking functions
Keywords :
encoding; picture processing; pulse-code modulation; DPCM; HDPCM coding; coders; coloured pictures; compression; differential pulse code modulation; hybrid DPCM; output vectors; placement; scalar quantizer; two-dimensional prediction error plane; vector quantizer; visual masking functions;
Conference_Titel :
Image Processing and its Applications, 1989., Third International Conference on
Conference_Location :
Warwick
