Circuit for color separation and contour correction

Details Circuit for color separation and contour correction Circuit for color separation and contour correction

1993-02-19

1994-02-08

Groody, James J.

Television

Image signal processing circuitry specific to television

Chrominance-luminance signal separation

348713, 348 26, 348253, H04N 978, H04N 977

Patent

active

052852679

ABSTRACT:
A circuit for a video camera for color separation and contour correction which can perform color separation and contour correction of a signal from a charge coupled device image sensor specifically utilizing two 1H (1 horizontal period) delay elements. The circuit adds a 2H delayed chrominance signal from a delay unit and a current input chrominance signal. This sum is then decreased by one-half. The circuit separates red and blue components of the chrominance signals decreased by half and from the 1H delayed chrominance signal from the delay unit. Next, vertical and horizontal contour correcting signals are generated in response to the 1H delayed chrominance signal from the delay unit and in response to the output of an amplifying unit. Thus, the present invention uses two 1H delay elements to perform color separation as well as contour correction to thereby simplify the overall circuit design.

REFERENCES:
patent: 4698673 (1987-10-01), Johnson
patent: 4706113 (1987-11-01), Ito
patent: 4843457 (1989-06-01), Yamagata
patent: 5019895 (1991-05-01), Yamamoto

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