Method and apparatus for removing phase modulation from the colo

Details Method and apparatus for removing phase modulation from the colo Method and apparatus for removing phase modulation from the colo

1984-07-03

1986-12-02

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358319, 358120, 360 371, H04N 945, H04N 9455, H04N 980, H04N 7167

Patent

active

046268901

ABSTRACT:
A video signal of the type having phase modulation induced in the color burst component thereof to inhibit video tape recording, is modified to remove the phase modulation and permit acceptable video tape recording. The phase modulated color burst component of an incoming video signal drives a phase lock loop, which regenerates a color burst component free of the modulation for insertion into the video signal.

REFERENCES:
patent: 4145705 (1979-03-01), Yoshinaka
patent: 4327373 (1982-04-01), Gomi
patent: 4413274 (1983-11-01), Hosoya
patent: 4468687 (1984-08-01), Munezawa et al.
patent: 4544943 (1985-10-01), Quan

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