Television – Image signal processing circuitry specific to television – Special effects
Patent
1992-09-30
1994-05-17
Groody, James J.
Television
Image signal processing circuitry specific to television
Special effects
348645, 348649, H04N 974
Patent
active
053132750
ABSTRACT:
Video systems generally include chroma processors. The chroma processor may be configured as a chroma keyer, a key signal generator or a color collector. The chroma processor includes dual input look-up tables which are loaded by a central processor. The dual input look-up tables may be read and written to simultaneously. The look-up tables are addressed by chrominance signals, luminance signals or key signals input into the chroma processor. The look-up tables provide an exceptionally fast apparatus and exceptionally flexible method of keying one or more simultaneous regions of the display based on one or more unique chroma/luma combinations, new key signals, chrominance signals, and luminance signals. The chroma processor receives color modification parameters from a software user interface. Preferably, the chroma processor utilizes Y luminance signals, and U and V chrominance signals.
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Daly Richard T.
Post Paul C.
Stabler Robert N.
Wiggins Randy
Colorgraphics Systems, Inc.
Groody James J.
Hsia Sherrie
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