Channel selecting apparatus automatically detecting different mo

Details Channel selecting apparatus automatically detecting different mo Channel selecting apparatus automatically detecting different mo

1990-01-04

1992-02-11

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

3581951, 455182, H04N 550

Patent

active

050879774

ABSTRACT:
A channel selecting apparatus for television receiving apparatus and the like which memorizes channel data (about whether signals are present or not in respective channels) in a memory circuit connected to an operating circuit preparing channel selecting data. The received frequency is tuned with the broadcast signal input into an antenna terminal and is then confirmed and analyzed. This is used to determine whether the broadcast signal input into the antenna terminal is a TV signal or CATV signal and whether the CATV signal is of an STD, HRC or IRC system and the receiving mode is automatically determined.

REFERENCES:
patent: 4422096 (1983-12-01), Henderson
patent: 4485404 (1984-11-01), Tults
patent: 4689685 (1987-08-01), Testin et al.
patent: 4763195 (1988-08-01), Tults
patent: 4868892 (1989-09-01), Tults et al.
patent: 4914516 (1990-04-01), Duffield
patent: 5034819 (1991-07-01), Tsukagoshi

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