Optimization processing for integrated circuit physical design a

Details Optimization processing for integrated circuit physical design a Optimization processing for integrated circuit physical design a

1996-02-13

1999-09-07

Garber, Wendy

Television

Camera, system and detail

Combined image signal generator and general image signal...

348222, 348273, 348280, 348645, 348649, 358520, H04N 5335, H04N 964, H04N 968, H04N 5228

Patent

active

059494824

ABSTRACT:
There is provided a signal processing apparatus for processing input three primary color signals, which is capable of providing natural color reproduction. Input color signals R to B are subjected to a matrix operation to obtain color difference signals (R-Y)0 and (B-Y)0. The color signals R to B are compressed by means of high luminance compression circuits 12R to 12B, respectively, and these output color signals R1, G1 and B1 are subjected to obtain a luminance signal Y1, color difference signals (R-Y)1 and (B-Y)1. The respective outputs obtained from the matrix operation are operated by means of look-up tables 43 to 45 and 52 to obtain color difference signals (R-Y)3 and (B-Y)3 for representing a color which has the same hue as a hue .theta. 0 of color represented by color signals R to B and a saturation same with the saturation r1 of color represented by color signals R1, G1 and B1. Then, the luminance signal Y1, color difference signals (R-Y)3 and (B-Y)3 are subjected to an inverse matrix operation to obtain output color signals Rn, Gn and Bn. The color signals thus obtained have no change in a hue and the saturation smaller than that of conventional ones even if high luminance compression processing is executed. Accordingly, a high luminance portion can be prevented from being too deeply colored.

REFERENCES:
patent: 5181105 (1993-01-01), Udagawa et al.
patent: 5357279 (1994-10-01), Nakamura et al.
patent: 5436673 (1995-07-01), Bachmann et al.
patent: 5446504 (1995-08-01), Wada
patent: 5691779 (1997-11-01), Yamashita et al.

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