Caption line finding circuit for pictorial signal processor

Details Caption line finding circuit for pictorial signal processor Caption line finding circuit for pictorial signal processor

1995-07-14

1996-09-24

Kostak, Victor R.

Television

Nonpictorial data packet in television format

Data separation or detection

348468, H04N 7087

Patent

active

055595600

ABSTRACT:
An improved caption line finding circuit for a pictorial signal processor, which in a circuit capable of extracting a data of a horizontal scanning line of a pictorial signal, includes a synchronous signal detector for detecting a vertical synchronous signal and a horizontal synchronous signal from a pictorial signal applied thereto; and a caption decoder for detecting a caption data contained in a scanning line from a pictorial signal data using a signal obtained by counting a certain horizontal synchronous signal among horizontal synchronous signals outputted from the synchronous signal detector from the time when a vertical synchronous signal is outputted thereto from the synchronous signal detector and using a signal obtained by counting for a predetermined time from the time when a vertical synchronous signal is outputted thereto from the synchronous signal detector.

REFERENCES:
patent: 5223930 (1993-06-01), Zato
patent: 5453794 (1995-09-01), Ezaki
patent: 5453795 (1995-09-01), Tults

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