Method and apparatus for compatibly locking horizontal sync to t

Details Method and apparatus for compatibly locking horizontal sync to t Method and apparatus for compatibly locking horizontal sync to t

1987-06-09

1989-01-10

Shepperd, John W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 16, H04N 944, H04N 1116

Patent

active

047977310

ABSTRACT:
Circuits are provided for increasing the frequency of the standard PAL line sync signals so that they have the same phase relationship with the color subcarrier every fourth line. The generation of a standard PAL sync signal is achieved by generating a signal as just described and decreasing its horizontal frequency.

REFERENCES:
patent: 4145705 (1979-03-01), Yoshinaka
patent: 4178607 (1979-12-01), Mikado
patent: 4450474 (1984-05-01), Mizukami
patent: 4467356 (1984-08-01), McCoy
patent: 4635100 (1987-01-01), Hirakawa
patent: 4660074 (1987-04-01), Schine
patent: 4661840 (1987-04-01), Phelps
patent: 4679005 (1987-07-01), Tatami

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