H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/30.5
H04N 17/06 (2006.01) G11B 31/00 (2006.01) H04N 5/775 (2006.01) H04N 7/16 (2006.01) H04N 17/04 (2006.01) H04H 9/00 (2006.01)
Patent
CA 1279400
6082-224 ABSTRACT OF THE DISCLOSURE 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 band- pass filter on the VCR video output restricts the tv's ability to tune 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. CDC 887-CA
519368
Control Data Corporation
Smart & Biggar
LandOfFree
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