公开(公告)号：US5633654A

公开(公告)日：1997-05-27

申请号：US406094

申请日：1995-03-16

申请人： Howard J. Kennedy, Jr. ,  Josh Herman ,  Rich Gerber ,  Dan Harwell ,  Gerald Cross ,  Judi Goldstein ,  Terry Downs ,  Mike Hawash

发明人： Howard J. Kennedy, Jr. ,  Josh Herman ,  Rich Gerber ,  Dan Harwell ,  Gerald Cross ,  Judi Goldstein ,  Terry Downs ,  Mike Hawash

IPC分类号： G06F9/48 ,  G09G5/00 ,  G09G5/36 ,  G09G5/39

CPC分类号： G06F9/4843 ,  G09G5/00 ,  G09G5/39 ,  G09G2340/02 ,  G09G2340/125 ,  G09G5/363

摘要： 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.

摘要翻译： 用于两个或多个视频流的视频数据由包含一个或多个后台命令的单个后台命令列表和包含一个或多个前台命令的单个前台命令列表来处理，其中前台命令列表仅在 显示监视器的光栅。 然后在光栅周期期间显示经处理的视频数据。 在优选实施例中，如果后台命令的实现在垂直消隐间隔的开始尚未完成，则后台命令被中断，后台命令实现的状态被保存，前台命令列表被实现，然后是 中断后台命令恢复。 后台命令优选不直接影响显示位图的命令，而前景命令是直接影响显示位图的命令。 本发明确保视频数据处理和基于光栅的视频显示的正确同步。