Apparatus for correcting distorted sync in a composite video...

Details Apparatus for correcting distorted sync in a composite video... Apparatus for correcting distorted sync in a composite video...

H - Electricity

04

N

350/85

H04N 5/04 (2006.01) H04N 5/08 (2006.01) H04N 5/213 (2006.01)

Patent

CA 2039782

A television receiver includes a "one-chip" television signal processing IC which has a terminal for receiving a composite video signal including both image and synchronization pulse components. A composite video signal which has been non- linearly processed by a so-called "black-stretch" circuit is coupled to the composite video signal input terminal of the "one-chip" IC. In order that a sync separator of the "one-chip" IC can reliably separate the synchronization pulses from the composite video signal after it has been non-linearly processed, a sync correction circuit, including an auxiliary sync separator, is used to modify the synchronization pulses of the composite video signal after it is non-linearly processed and before it is coupled to the "one-chip" television IC.

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