Television – Image signal processing circuitry specific to television – Chrominance signal amplitude control
Patent
1994-03-14
1995-08-29
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Chrominance signal amplitude control
348646, H04N 968
Patent
active
054465044
ABSTRACT:
An input section receives an image signal including signals related to colors to output at least a luminance signal component of the image signal. A compressing section compresses the dynamic range of the luminance signal component from the input section. A setting section obtains a compression coefficient from a relationship between the luminance signal component whose dynamic range is compressed by the compressing section and the luminance signal component from the input section. An operating section executes an operation for compressing dynamic ranges of the signals related to colors included in the image signal in accordance with the compression coefficient obtained by the setting section. A correcting section substantially corrects the color saturation of the signals related to a color included in the image signal while preserving the luminance of the image signal such that the color saturation is more intensively suppressed as the luminance becomes lower.
REFERENCES:
patent: 4661841 (1987-04-01), Suzuki
patent: 4926247 (1990-05-01), Nagasaki et al.
patent: 4980756 (1990-12-01), Cagoni
patent: 5317427 (1994-05-01), Ichikawa
patent: 6060060 (1991-10-01), Udagawa et al.
Flynn Nathan J.
Kostak Victor R.
Olympus Optical Co,. Ltd.
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