Device and method for generating a composite color signal with d

Details Device and method for generating a composite color signal with d Device and method for generating a composite color signal with d

1997-12-16

1999-07-27

Peng, John K.

Television

Image signal processing circuitry specific to television

Color encoder or chrominance signal modulator

348638, 348639, 348660, H04N 965

Patent

active

059299371

ABSTRACT:
A device and method for generating a composite color signal are disclosed. The device includes a first memory unit for storing digital cosine data, a second memory unit for storing digital sine data, a first arithmetic unit for multiplying digital color difference data Cr input thereto with the digital cosine data, a second arithmetic unit for multiplying digital color difference data Cb input thereto with the digital sine data, and an adder for adding outputs of the first and arithmetic units to generate a digital composite color signal. The method includes the steps of storing digital cosine data and sine data in at least one of first and second memories, modulating digital color data using the stored digital sine and cosine data, and generating a composite color signal using the modulated digital color data.

REFERENCES:
patent: 4633187 (1986-12-01), Nishimura
patent: 5166780 (1992-11-01), Shyu
patent: 5200978 (1993-04-01), Lo Curto et al.
patent: 5448592 (1995-09-01), Williams et al.
patent: 5638135 (1997-06-01), Mukai
K. Jack; "Video Demystified: A Handbook for the Digital Engineer"; Second Edition; HighText Publications (1996) pp. 153-164 and p. 232.

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