Title :
Digital bit-rate reduction systems of HDTV
Author :
Ohtsuka, Yoshimichi ; Nakasu, Eisuke ; Shishikui, Yoshiaki
Author_Institution :
NKK Sci. & Tech. Res. Lab., Tokyo, Japan
Abstract :
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
Keywords :
decoding; encoding; high definition television; picture processing; pulse-code modulation; video signals; DCT; DPCM; HDTV picture; PCM; bit-rate reduction systems; computer simulation; contribution links; differential pulse-code modulation; digital coding; discrete transform cosine; picture quality; vector quantization; Broadcasting; Degradation; Discrete cosine transforms; Discrete transforms; Guidelines; HDTV; Laboratories; Roads; Testing; Video compression;
Conference_Titel :
Circuits and Systems, 1990., IEEE International Symposium on
Conference_Location :
New Orleans, LA
DOI :
10.1109/ISCAS.1990.112060
