Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-12-07
1993-05-04
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 1110
Patent
active
052086593
ABSTRACT:
The present invention is directed to improving immunity to channel distortions of multiplexed analog component television signals by independently transmitting a clock recovery burst and a DC restoration reference level during the horizontal blanking interval of a video line. More particularly, the clock recovery burst and the DC restoration reference level are transmitted on independent lines. The integrity of the television receiver's system is not compromised if the clock recovery burst is not transmitted on every line. Accordingly, the problems inherent in the prior art are avoided by independently transmitting the clock recovery burst and the DC restoration reference level on separate lines during a portion of the horizontal blanking interval of the respective lines. The clock recovery burst and the DC restoration reference level could be transmitted on alternate lines or the clock recovery burst could be sent every Nth line with the DC restoration reference level transmitted on lines therebetween.
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Scientific - Atlanta, Inc.
Shepperd John W.
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