Digital bit-rate reduction systems of HDTV
Yoshimichi Ohtsuka, Eisuke Nakasu, Yoshiaki Shishikui · 2002
A study of digital coding of an HDTV picture appropriate for use with contribution links is described. Three coding methods, which are based on differential pulse-code modulation (DPCM), discrete transform cosine (DCT), and vector quantization (VQ) techniques, respectively, are proposed and evaluated with the aid of computer simulation. It has been found that all three methods provide good picture quality without perceptible degradation when used at a bit rate of twice the H4 rate. The vector-quantization-based method is the most hopeful candidate for transmission at a rate of H4.>