System for combining multiple-format multiple-source video signals
First Claim
1. A system for creating a composite image having a plurality of destination pixels by selectively combining a plurality of simultaneously available video signals, each of said video signals including a plurality of source pixels, said system comprising:
- input means for receiving the plurality of video signals, each of said video signals having a predetermined video format the number of video formats being greater than one;
encoding means coupled to said input means for encoding each source pixel of each video signal into a data item, each data item corresponding to said corresponding destination pixel and including a color identifier and a video format identifier;
multiplexing means coupled to the encoding means for selecting one of the data items;
memory means for storing the selected data item; and
decoding means coupled to the memory means for decoding the selected data item to determine a color and the format of one of said corresponding destination pixels.
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Abstract
The system generates a composite image on a pixel-by-pixel basis by selectively mapping source pixels provided by video sources of different video formats onto destination pixels in the composite image. The mapping is accomplished by encoding the source pixels into digital words, each word having a color information part and a video format identifier, used to decode the color information part upon processing to organize the composite image. Combining video signals with computer-generated graphics data is achieved under control of the graphics data being interpreted either as video format identifier or as color. If the color of the destination pixel is determined by one of the video sources, the graphics data is used to select the appropriate decoding. The system permits a modular architecture and simple merging with a PC.
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Citations
8 Claims
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1. A system for creating a composite image having a plurality of destination pixels by selectively combining a plurality of simultaneously available video signals, each of said video signals including a plurality of source pixels, said system comprising:
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input means for receiving the plurality of video signals, each of said video signals having a predetermined video format the number of video formats being greater than one; encoding means coupled to said input means for encoding each source pixel of each video signal into a data item, each data item corresponding to said corresponding destination pixel and including a color identifier and a video format identifier; multiplexing means coupled to the encoding means for selecting one of the data items; memory means for storing the selected data item; and decoding means coupled to the memory means for decoding the selected data item to determine a color and the format of one of said corresponding destination pixels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification