Television – Image signal processing circuitry specific to television – Special effects
Patent
1993-10-13
1996-01-23
Harvey, David E.
Television
Image signal processing circuitry specific to television
Special effects
348571, H04N 5262
Patent
active
054868734
ABSTRACT:
The present invention is an analog screen-art circuit for displaying a video signal resembling a picture on a screen. The screen-art circuit includes a video signal processor having a color killer circuit for eliminating chrominance signals in a composite video signal. The screen-art circuit also includes an art mode selector for controlling the operation of the screen-art circuit, a number of serially connected delay elements for delaying the signal generated by the video signal processor by respective 1H periods and a switch for selectively switching the signals generated from the video signal processor and the 1H delays when operating in the art mode. The switch is responsive to a control signal provided by a control signal generator which logically combines a number of signals, one of which is based on a composite sync signal generated from the video processor. According to one embodiment of the invention, the other of the two signals is a head switching signal which is commonly found in most VCRs. According to a second embodiment, the other of the two signals is a vertical sync signal which is again extracted from the composite video signal.
REFERENCES:
patent: 4888643 (1989-12-01), Kusakabe
patent: 4891702 (1990-01-01), Nakayama et al.
Matley, J. Brian "A Digital Framestore Synchronizer" SMPTE Journal vol. 85 No. 6 Jun. 1976.
Harvey David E.
Samsung Electronics Co,. Ltd.
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