Synchronization input for television receiver on- screen...

Details Synchronization input for television receiver on- screen... Synchronization input for television receiver on- screen...

H - Electricity

04

N

375/15, 350/87

H04N 5/04 (2006.01) H04N 5/445 (2006.01)

Patent

CA 1210855

ABSTRACT An arrangement for a television receiver is disclosed which facilitates the coupling of synchronization signals to an on-screen display integrated circuit of the receiver. The receiver includes sources of periodic vertical and horizontal rate pulses. A composite timing signal generator combines the vertical and horizontal rate pulses so as to form a composite timing signal in which the horizontal rate pulses are absent during the duration of each vertical rate pulse. The composite timing signal is coupled via a single conductor path to an input terminal of the on-screen display circuit. The composite timing signal can be readily decoded by a simple digital counter to provide separate horizontal and vertical rate pulses for the on-screen display circuit.

449983

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