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    • 1. 发明授权
    • Method and system for distributed video compression in personal computer architecture
    • 个人电脑架构中分布式视频压缩的方法与系统
    • US06980595B2
    • 2005-12-27
    • US10179659
    • 2002-06-24
    • Robert C. RoseMatthew J. AdilettaSamuel W. Ho
    • Robert C. RoseMatthew J. AdilettaSamuel W. Ho
    • H04N7/26H04N7/50H04N7/12H04N7/15
    • H04N21/4143H04N19/42H04N19/61
    • A method and system for compressing video data in a computer has video processing that is distributed between preprocessing hardware in a video capture/controller card and a central processing unit of the computer. Frames of video data are passed to a motion estimation unit of the preprocessing hardware. This unit generates motion information describing inter-frame changes in the video data. Next, motion-compensated temporal filtering is performed on the frames of video data using the motion information. A video frame processing unit of the controller card, used for processing video data to the monitor, is reused for the temporal filtering of the input video data. Finally, the temporally-filtered video data is passed to the central processing unit, which performs inter-frame and/or intra-frame compression with reference to the motion information. In this way, motion-compensated temporal filtering is performed, thus removing the associated noise without adding to the CPU's processing burden, but the costs associated with dedicated compression hardware are avoided by relying on the video capture capabilities in the video controller card.
    • 用于在计算机中压缩视频数据的方法和系统具有分布在视频捕获/控制器卡中的预处理硬件和计算机的中央处理单元之间的视频处理。 视频数据的帧被传送到预处理硬件的运动估计单元。 该单元生成描述视频数据中帧间变化的运动信息。 接下来,使用运动信息对视频数据的帧执行运动补偿时间滤波。 用于将视频数据处理到监视器的控制器卡的视频帧处理单元被重新用于输入视频数据的时间滤波。 最后,将经过时间滤波的视频数据传送到中央处理单元,该处理单元参照运动信息执行帧间和/或帧内压缩。 以这种方式,执行运动补偿时间滤波,从而消除相关噪声,而不增加CPU的处理负担,但是通过依赖于视频控制器卡中的视频捕获能力来避免与专用压缩硬件相关的成本。
    • 5. 发明授权
    • Pixel data formatting
    • 像素数据格式
    • US5128658A
    • 1992-07-07
    • US211778
    • 1988-06-27
    • James L. PappasLarry D. SeilerRobert C. Rose
    • James L. PappasLarry D. SeilerRobert C. Rose
    • G09G5/02G09G5/06G09G5/14
    • G09G5/026G09G5/06G09G5/14
    • Pixel formats and a pixel mapping unit for use in a computer graphics terminal which provides an address input to a color look-up table. The disclosed pixel formats can be used to conserve frame buffer memory, color table memory, or both. For example, the formats support pseudo color or full color mapping, overlay planes, and color table bank select while using a minimum amount of memory. A valid plane feature is also supported, which can be used to enable rapid clearing of a window. The pixel mapping unit is especially handy in supporting multiple windows, because a unique mapping configuration word, which specifies how pixels are to be interpreted, may be specified for each window.
    • 像素格式和用于计算机图形终端中的像素映射单元,其为颜色查找表提供地址输入。 所公开的像素格式可用于节省帧缓冲存储器,色表存储器或两者。 例如,格式支持伪彩色或全色映射,重叠平面和彩色表格库选择,同时使用最小量的内存。 还支持有效的平面功能,可用于快速清除窗口。 像素映射单元特别方便地支持多个窗口,因为可以为每个窗口指定唯一的映射配置字,其指定如何解释像素。
    • 6. 发明授权
    • Semaphore controlled video chip loading in a computer video graphics
system
    • 信号量控制视频芯片加载在计算机视频图形系统中
    • US5058041A
    • 1991-10-15
    • US206203
    • 1988-06-13
    • Robert C. RoseLarry D. SeilerJames L. Pappas
    • Robert C. RoseLarry D. SeilerJames L. Pappas
    • G09G5/14G09G5/395
    • G09G5/395G09G5/14
    • A method and apparatus for updating the copies of state table values of a video data path chip set for a computer graphics system is provided. The apparatus uses off screen bitmap memory or other dual-ported memory in a frame buffer to store a shadow copy of the state that is stored in the video data path chips. The state tables include such things as color lookup tables, window definitions and cursors. A semaphore is used to prevent screen glitches caused by updating state tables from the copy of state table values that are partially modified. The state tables are loaded into the chips during vertical retrace, when the screen is being blanked. Before the CPU begins to update the shadow copy in the frame buffer, it claims the semaphore. If a vertical retrace occurs before the CPU has completed updating the frame buffer, the chips are not loaded during that vertical retrace. Before the chips start loading, a system timing chip claims the semaphore. The CPU cannot commence modifying the frame buffer until the load is finished.
    • 提供了一种用于更新计算机图形系统的视频数据路径芯片组的状态表值的副本的方法和装置。 该设备使用屏幕位图存储器或帧缓冲器中的其他双端口存储器来存储存储在视频数据路径芯片中的状态的影子副本。 状态表包括颜色查找表,窗口定义和光标等。 信号量用于防止从部分修改的状态表值的副本更新状态表导致的屏幕故障。 当屏幕被消隐时,状态表在垂直回扫期间加载到芯片中。 在CPU开始更新帧缓冲区中的卷影副本之前,它会声明信号量。 如果在CPU完成更新帧缓冲区之前发生垂直回扫,则在该垂直回扫期间芯片不会被加载。 在芯片开始加载之前,系统定时芯片要求信号量。 在负载完成之前,CPU无法开始修改帧缓冲区。