Chroma demodulation apparatus for use with skew corrected clock

Details Chroma demodulation apparatus for use with skew corrected clock Chroma demodulation apparatus for use with skew corrected clock

1987-03-31

1988-04-05

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 25, 358 23, H04N 966, H04N 9475

Patent

active

047362375

ABSTRACT:
An apparatus is disclosed for generating a burst-locked, color subcarrier representative signal .phi..sub.sc from a skew-corrected clock signal MCS (which is reset once every horizontal line) and a skew error signal SES (indicative of the once-a-line phase adjustment of the skew-corrected clock signal). In accordance with another feature of the invention, a chroma demodulation apparatus is provided for generating a pair of color difference signals R-Y and B-Y in response to the internally-generated .phi..sub.sc signal.

REFERENCES:
patent: 4595953 (1986-06-01), Willis
patent: 4612568 (1986-09-01), den Hollander et al.
patent: 4623925 (1986-11-01), Tults
patent: 4646136 (1987-02-01), Kouyama
patent: 4677463 (1987-06-01), Aben
Presentation by Tom Nillesen at Jun. 1985 International Conference on Consumer Electronics in Chicago entitled "Line-Locked Digital Colour Decoding".
U.S. patent application, Ser, No. 771,770, entitled "Timing Correction Circuit for a Picture-In-Picture Television System".
U.S. patent application, Ser. No. 845,698 entitled "Digital Phase Locked Loop Stabilization Circuitry Including a Secondary Digital Phase Locked Loop Which May be Locked at an Indeterminate Frequency".

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