Television signal chrominance adjustment
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
May 18, 1998
filing date -
May 16, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention provides an improved method and system for presenting color television signals. Television signal chrominance values for foreground elements are adjusted in response to television signal chrominance values for background elements, so as to minimize display artifacts while preserving the relative color contrast between foreground and background. (1) The invention modifies I and Q values of the foreground color to reduce the difference of the foreground I and Q with respect to the background I and Q. (2) The invention modifies Y, I and Q values of the foreground color to avoid colors known to display poorly for selected output devices. (3) The invention modifies Y values of the foreground color to maintain intended visual contrast between foreground and background colors. (4) The invention modifies Y, I and Q values of the foreground color to decrease cross-luminance separation artifacts at the border between foreground and background colors.
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Family
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Cited Art Landscape
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