Television – Synchronization – Sync separation
Patent
1995-12-12
1998-05-19
Chin, Tommy P.
Television
Synchronization
Sync separation
348534, H04N 510
Patent
active
057542511
ABSTRACT:
A digital video vertical synchronization pulse detector for detecting a vertical synchronization pulse in a video signal is disclosed. The digital video vertical synchronization pulse detector includes a threshold device for comparing a first digital data stream generated from the video signal to a sync threshold. An integration device integrates the video signal in response to the threshold device to generate a second digital data stream. Upper and lower threshold devices compare the second digital data stream to upper and lower thresholds. A detection device responsive to the upper and lower threshold devices detects when the second digital data stream crosses the upper and lower thresholds. When the second digital data stream crosses the upper threshold, the detection device generates a first vertical sync pulse and when the second digital data stream crosses the lower threshold, the detection device is reset to enable generation of subsequent vertical sync pulses.
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Chin Tommy P.
Lee Y.
TRW Inc.
Yatsko Michael S.
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