PAL System synchronizing signal generating apparatus

Details PAL System synchronizing signal generating apparatus PAL System synchronizing signal generating apparatus

1982-04-05

1984-05-22

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358150, H04N 946, H04N 506

Patent

active

044504748

ABSTRACT:
Synchronizing signals in a PAL system are generated without the need for an n f.sub.H oscillator by generating a reference signal having 568 cycles per line, adding a half cycle per line and then substracting one cycle per field. Pre-synchronizing signals are generated from the processed reference signal and the pre-synchronizing signals are then phase shifted by an amount which varies linearly with respect to elapsed time during each field from a value of zero to a value of substantially 1/(2 f.sub.sc).

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