Apparatus for extracting a composite video signal of a selected

Details Apparatus for extracting a composite video signal of a selected Apparatus for extracting a composite video signal of a selected

1995-10-06

1996-11-26

Kostak, Victor R.

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

348385, 386 36, 386122, H04N 576

Patent

active

055791220

ABSTRACT:
An apparatus for accurately extracting a selected channel of composite video signal from a time division multiplexed video signal. When a time division multiplexed video signal is reproduced from a video tape, noise may be induced due to tracking errors. To prevent noise from causing errors in demultiplexing of a given channel of composite video information from the time multiplexed video signal, a data detector (10) are provided to detect plural channel identification codes embedded in the vertical blanking period of the composite video signals. The plural detected channel identification codes are compared by comparators (60, 62) to determine if they match the channel identification code corresponding to a selected video channel. The results of the comparisons are subject to a logical OR operation (64) to determine when a composite video signal from a selected channel is to be appropriately extracted to be processed through a video signal processor (70) and for display on a monitor.

REFERENCES:
patent: 5187589 (1993-02-01), Kono et al.
patent: 5444546 (1995-08-01), Fujimoto
patent: 5497244 (1996-03-01), Chargin, Jr. et al.

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