Monitoring system and method for determining channel reception o

Details Monitoring system and method for determining channel reception o Monitoring system and method for determining channel reception o

1987-05-05

1988-08-16

George, Keith E.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 1704, H04H 900

Patent

active

047648082

ABSTRACT:
A system and method are provided for determining the broadcast signal source for the signal being displayed by a video wave receiver, whether tuned by the monitored receiver or an associated tuner device, such as a cable converter or video cassette recorder. The monitoring system includes a probe for detecting a horizontal sweep signal of the monitored receiver. The frequency of the detected horizontal sweep signal is determined and compared to stored characteristic frequency values corresponding to the predetermined channels to which the video receiver may be tuned.

REFERENCES:
patent: 2903508 (1959-09-01), Hathaway
patent: 3312900 (1967-04-01), Jaffe
patent: 3372233 (1968-03-01), Currey
patent: 3803349 (1974-04-01), Watanabe
patent: 4577220 (1986-03-01), Laxton et al.
patent: 4622583 (1986-11-01), Watanabe et al.
patent: 4635109 (1987-01-01), Comeau
patent: 4723302 (1988-02-01), Fulmer et al.

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