Circuit for separating luminance and chrominance signals from a

Details Circuit for separating luminance and chrominance signals from a Circuit for separating luminance and chrominance signals from a

1990-08-30

1992-03-24

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 22, H04N 978

Patent

active

050993151

ABSTRACT:
A Y/C separation circuit for separating the Y and C components of a composite video signal having a horizontal scan period, which includes an input circuit for receiving the composite video signal, a first delay which receives the composite video signal and delays the composite video signal by an amount equal to an integer times the horizontal scan period, a second delay which receives the delayed output signal from the first delay and delays delayed output signal by an amount equal to an integral plus one times the horizontal scan period, a C component extraction circuit which receives the composite video signal and the output from the first and second delays and outputs a C component signal representing the C component of the composite video signal and a Y component extraction circuit which receives the composite video signal from the input circuit and the C component signal from the C component extraction circuit and generates a Y component signal representing the Y component of the composite video signal by subtracting the C component signal from the composite video signal.

REFERENCES:
patent: 4050084 (1977-09-01), Rossi
patent: 4703342 (1987-10-01), Takahashi
patent: 4843457 (1989-06-01), Yamagata
patent: 4984737 (1990-12-01), Umezawa

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