Television – Bandwidth reduction system – Data rate reduction
Patent
1995-06-06
1997-03-18
Tran, Thai Q.
Television
Bandwidth reduction system
Data rate reduction
348392, H04N 724
Patent
active
056127480
ABSTRACT:
In the case where a wide-band color picture signal provided for a high-definition television broadcasting is sub-sampled for narrow-band transmission, in comparison with a stationary picture signal which is applied with sub-sampling according to a sampling pattern circulated at every two frames, the color picture signal in motional picture regions, which is conventionally applied with line-offset sub-sampling at every field, has a lowered resolution. To improve the resolution concerned, color difference signals in motional picture regions are applied with inter-field offset sub-sampling together with band-limitation for preventing aliasing distortion accompanied with subsampling and signal processing including interpolation for reproduction, which are effected in a form completed at every frame. As for motional picture regions having small motion, a luminance signal is applied also with similar sub-sampling and similar signal processing. As a result, the overall picture quality of the reproduced motional color picture is improve by signal processing thus adapted for color pictures in motional picture regions.
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Yuichi Ninomiya, et al, "Concept of the MUSE System and its Protocol", NHK Laboratories Note, Jul. 1987.
Gohshi Seiichi
Izumi Yoshinori
Naemura Masahide
Yamaguchi Kouichi
Nippon Hoso Kyokai
Tran Thai Q.
Tung Bryan S.
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