Television – Synchronization – Sync separation
Reexamination Certificate
2008-01-22
2008-01-22
Kostak, Victor R. (Department: 2622)
Television
Synchronization
Sync separation
C348S536000, C348S540000
Reexamination Certificate
active
07321398
ABSTRACT:
A processing circuit for a sync signal includes a trial circuit and a windowing circuit. The trial circuit includes a counter that generates a count value proportional to the duration between successive sync pulses. When the count value reaches a trial sync spacing count value, a trial window signal is created and the counter is reset. If a predetermined number of subsequent sync pulses occur within the trial window signal, the sync spacing count value is confirmed and stored in a sync spacing register. The windowing circuit includes a counter that generates a count value proportional to the duration between successive window signals, and compares the count value to the value stored in the sync spacing register to generate a window signal. The window signal is compared with the sync signal pass valid sync signals.
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Gennum Corporation
Jones Day
Kostak Victor R.
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