Method and apparatus for displaying a video window in a computer graphics display
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United States of America Patent
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Jul 7, 1998
Issued Date -
N/A
app pub date -
Sep 11, 1997
filing date -
Jul 27, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method and apparatus of displaying video and graphics data together in a computer graphics display using only the memory needed for the graphics display includes determining the location of the video window in the frame buffer, writing video data to the portion of the frame buffer bounded by the video window. During the raster scan of the frame buffer, if the raster position is within the video window, video data are read from the video data addresses within the video window. When the displayed video window position is changed, the video data are moved accordingly.
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