Automatic channel matching system and method thereof

Details Automatic channel matching system and method thereof Automatic channel matching system and method thereof

1992-04-28

1994-01-11

Powell, Mark R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581931, 4551613, 4551823, H04N 550

Patent

active

052786552

ABSTRACT:
An automatic channel matching system for viewing a video signal produced by a VCR at any channel at which a TV is tuned without changing the TV channel when in a VCR mode. A coarse tuning operation is first performed when receiving a VCR mode control signal by the system, which includes an RF channel frequency altering unit for variably generating a carrier wave frequency while shifting from a low channel frequency to a high channel frequency by a predetermined frequency bandwidth, generating a fixed current carrier wave frequency when the level of a detected synchronizing signal is higher than the level of noise in the signal output from a synchronizing signal detector, and generating a fixed carrier wave frequency tuned to match the channel frequency according to the output of a noise signal level converting unit.

REFERENCES:
patent: 4763195 (1988-08-01), Tults
patent: 5029015 (1991-07-01), Baxter

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