Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1989-01-26
1992-09-29
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358908, H04N 544
Patent
active
051517884
ABSTRACT:
In a content control system for identifying and eliminating commercials from a recording or presentation of a video signal there is shown a content control unit, a VCR and a TV.
The content control unit has an identification and a communication section. The identification section includes a blank frame detector, an activity detector and a timer for detecting the commercials. The communication section communicates by infra-red signals to control the functioning of the VCR and TV. The blank frame detector has a black level extractor being compensated for by a peak level extractor, and a frame luminance level extractor. A blank frame comparator compares the levels of the compensated black level and the frame luminance level. The activity detector determines the rate of change of frame luminance after the blank frame has been detected and the timer is set. The activity timer has an integrator and a differentiator.
REFERENCES:
patent: 3730986 (1975-05-01), Morehand
patent: 3745240 (1973-07-01), Morehand et al.
patent: 4259689 (1981-03-01), Bonner et al.
Groody James J.
Harvey David E.
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