US Patent No: 5,594,507
Number of patents in Portfolio can not be more than 2000
Compressed digital overlay controller and method for MPEG type video signal
Stats
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Jan 14, 1997
Issued date -
May 27, 1994
filing date -
08/250,723
serial no -
In Force
status
Importance
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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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First Claim
Related Publications
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International Classification(s)
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Cited Art
| Patent Info | (Count) | # Cites | Year |
|---|---|---|---|
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| 4,627,105 Signal transmission system and method | 23 | 1985 | |
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| 4,491,983 Information distribution system | 165 | 1982 | |
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| 4,536,791 Addressable cable television control system with video format data transmission | 307 | 1984 | |
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| 4,450,477 Television information system | 194 | 1982 | |
| 4,901,367 Cable communications system with remote switching and processing converters | 60 | 1988 | |