Television – Image signal processing circuitry specific to television – Special effects
Patent
1994-05-27
1997-01-14
Kostak, Victor R.
Television
Image signal processing circuitry specific to television
Special effects
348598, H04N 5272
Patent
active
055945074
ABSTRACT:
A controller, in accordance with a preferred embodiment provides, in a specified region of first television picture generated by a first digitally compressed video signal, an overlay of a second picture embodied in a second video signal. The controller includes an I-frame buffer for storing updated macroblock pixel data in I-frame format derived from the second signal. The controller also has a matte mask storage register for storing data that identifies the specified region by means of macroblocks. A matte substitution processor is in communication with the matte mask storage register and has as an input the first signal and provides an overlayed output; the controller inhibits transmission to the output of any macroblock, of the first signal's data stream, lying in the specified region. It also functions to substitute for such macroblock a corresponding macroblock from the I-frame buffer. Further embodiments permit overlay of a graphic display for interactive television on a picture derived from a digitally compressed video signal.
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Flynn Nathan J.
ICTV Inc.
Kostak Victor R.
LandOfFree
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