Data extracting apparatus for validating data multiplexed in a v

Details Data extracting apparatus for validating data multiplexed in a v Data extracting apparatus for validating data multiplexed in a v

1995-06-30

1997-01-28

Peng, John K.

Television

Nonpictorial data packet in television format

Data separation or detection

348537, H04N 7087

Patent

active

055982190

ABSTRACT:
Only the data sampled by a correct sampling clock is data processed. A PLL circuit 5 generates a sampling clock locked with a sync signal in a video signal and supplies to a sampling circuit 4. A lock flag indicating whether the generated sampling clock is correctly synchronized with the sync signal or not is also generated. The data multiplexed to the sync signal is sampled by the above sampling clock. The data is stored in a memory 7. The lock flag is supplied to a controller 2 and the data that is outputted from the memory 7 is made valid or invalid according to the level of the lock flag.

REFERENCES:
patent: 4052719 (1977-10-01), Hutt et al.
patent: 4277838 (1981-07-01), Chambers
patent: 4667235 (1987-05-01), Nozoe et al.
patent: 4712131 (1987-12-01), Tanabe
patent: 4768228 (1988-08-01), Clupper et al.
patent: 5404172 (1995-04-01), Berman et al.

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