Television – Image signal processing circuitry specific to television – Chrominance-luminance signal separation
Patent
1994-06-07
1996-03-19
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Chrominance-luminance signal separation
348712, 348713, 348664, 348665, 348669, H04N 978
Patent
active
055006868
ABSTRACT:
A filter for motion adaptive Y/C separation, which is capable of obtaining image of high resolution and little picture quality degradation in the case where an image is switched from static one to motion one or vice-versa, is provided with a filter for extracting Y signal outputting Y signal and a filter for extracting C signal outputting C signal, by detecting whether image is motion one or static one by a motion detecting unit, and when motion image is detected, by detecting partially interframe correlation or correlation in three fields, and according to the detection result, by adaptively switching a plurality of processings for extracting intraframe Y signal and a plurality of processings for extracting intraframe C signal.
REFERENCES:
patent: 4617589 (1986-10-01), Weckenbrock
patent: 4733297 (1988-03-01), Katsumata
patent: 4754322 (1988-06-01), Okuda
patent: 4987489 (1991-01-01), Hurley
patent: 5146318 (1992-09-01), Ishizuka
The article entitled "Development of 3-Dimensional High Quality Digital Color Decoder" to Dubious et al.
The article entitled "Cooperative Processing for Improved NTSC Chrominance/Luminance Separation" to Strolle, SMPTE Journal, Aug. 1986.
Ishizuka Mitsuru
Kijima Junko
Kurashita Takuji
Yamaguchi Noriyuki
Yao Masaharu
Hsia Sherrie
Kostak Victor R.
Mitsubishi Denki & Kabushiki Kaisha
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