Title :
Image subband VQ interframe coder
Author :
Fadzil, M. H Ahmad ; Dennis, T.J.
Author_Institution :
Dept. of Electron. Syst. Eng., Colchester Univ., UK
Abstract :
A motion compensated interframe prediction (MCIP) coder incorporating subband vector quantization is presented. The coder is based on two dimensional subband decomposition of the error image obtained after MCIP. The luminance and chrominance subbands, generated after the decomposition process, form image vectors which are then quantized using vector quantization. Low bit rates typically at 64 kbit/sec for videotelephony applications can be achieved by selecting only significant image vectors for transmission. A data compression algorithm that combines subband coding concepts and conventional VQ is used
Keywords :
analogue-digital conversion; encoding; picture processing; videotelephony; 64 kbit/s; chrominance subband; data compression algorithm; error image; image vectors; luminance subband; motion compensated interframe prediction; subband coding; subband vector quantization; two dimensional subband decomposition; vector quantisation interframe coder; vector quantization; videotelephony applications;
Conference_Titel :
Low Bit Rate Image Coding, IEE Colloquium on
Conference_Location :
London
