Video cassette recorder adapter

Details Video cassette recorder adapter Video cassette recorder adapter

1985-10-01

1986-12-30

George, Keith E.

Facsimile and static presentation processing

Static presentation processing

Attribute control

455 2, H04N 1704, H04N 1706, H04H 900

Patent

active

046333029

ABSTRACT:
An adapter for metering tv viewing in homes having video cassette recorders ("VCR's"). The adapter disables antenna (cable) input to the VCR except when in the record mode. Record mode is detected by a probe which detects the 70 MHz erase signal of the erase heads. When in record mode, antenna input to the VCR is enabled and a tv meter determines channel tuning. A bandpass filter on the VCR video output restricts the tv's ability to tube channels other than the VCR output. If the tv is tuned to the VCR output channel, the viewer is monitoring the program being recorded or watching a prerecorded tape. Otherwise, he is tuning through the normal antenna (cable) input and a meter determines the tv's channel tuning.

REFERENCES:
patent: 4044376 (1977-08-01), Porter
patent: 4388644 (1983-06-01), Ishman et al.
patent: 4546382 (1985-10-01), McKenna et al.
patent: 4574304 (1986-03-01), Watanabe et al.

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