Television – Nonpictorial data packet in television format – Data separation or detection
Patent
1992-03-11
1994-12-06
Powell, Mark R.
Television
Nonpictorial data packet in television format
Data separation or detection
348478, 375 76, 327 73, H04N 7087, H04N 708
Patent
active
053715454
ABSTRACT:
An auxiliary video data decoder provides for correcting synchronization error between a sync signal and a video signal that may contain auxiliary video data. Cycles of a reference waveform included in the auxiliary video data are counted during a timing window to determine if synchronization is correct. An incorrect count indicates a synchronization error exists. The window timing is adjusted with respect to the sync signal. The timing test is repeated. Repeated failure of the test indicates that auxiliary video data does not exist in the video signal.
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Emanuel Peter M.
Grant Chris
Powell Mark R.
Shedd Robert D.
Thomson Consumer Electronics Inc.
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