Computer graphics processing and selective visual display system – Plural physical display element control system – Display elements arranged in matrix
Patent
1995-03-16
1997-05-27
Saras, Steven
Computer graphics processing and selective visual display system
Plural physical display element control system
Display elements arranged in matrix
345189, 348584, G09G 500
Patent
active
056336543
ABSTRACT:
Video data for two or more video streams are processed by a single background command list containing one or more background commands and a single foreground command list containing one or more foreground commands, where the foreground command list is implemented only during a vertical blanking interval of the display raster of a monitor. The processed video data are then displayed during the raster period. In a preferred embodiment, if the implementation of a background command has not completed by the start of a vertical blanking interval, the background command is interrupted, the state of the background command implementation is saved, the foreground command list is implemented, and then the interrupted background command is resumed. The background commands are preferably those that do not directly affect the display bitmaps, while the foreground commands are those that do directly affect the display bitmaps. The invention assures proper synchronization of video data processing and raster-based video display.
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Cross Gerald
Downs Terry
Gerber Rich
Goldstein Judi
Harwell Dan
Intel Corporation
Mendelsohn Steve
Murray William H.
Saras Steven
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