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1. 发明授权

US5790110A System and method for generating video in a computer system 失效
公开(公告)号：US5790110A
公开(公告)日：1998-08-04
申请号：US783777
申请日：1997-01-15
申请人： David C. Baker , Daniel P. Mulligan , Eric J. Schell
发明人： David C. Baker , Daniel P. Mulligan , Eric J. Schell
IPC分类号： H04N11/20 , G09G5/00 , G09G5/06 , G09G5/39 , G09G5/393 , G09G5/395 , H04N7/01 , H04N9/64 , H04N11/14 , H04N11/16 , G09G5/02
CPC分类号： H04N9/641 , G09G5/39 , G09G2310/04 , G09G2340/02 , G09G2340/125 , G09G5/06 , G09G5/393 , H04N11/14 , H04N11/16
摘要： A system and method for generating composite video signals in a computer. Digital pixel data may be processed by software to form component video pixel data, which may include luminance and chrominance components. A chrominance look-up table is provided in a display memory and is used for modulation of the chrominance components. The modulated components are then combined to form digital composite video pixel data which may be stored in a frame buffer in the display memory. Video control information is precalculated and stored in the display memory in advance. The digital composite video pixel data and video control information are then recovered from the display memory to produce a formatted stream of video data. The architecture of this system greatly reduces hardware complexity and bandwidth requirements. In addition, the process may be controlled by a media stream controller which is also adapted for audio and graphics processing. This allows the display memory and various other components to be shared by multiple media subsystems.

2. 发明授权

US5812204A System and method for generating NTSC and PAL formatted video in a computer system 失效
标题翻译：用于在计算机系统中产生NTSC和PAL格式视频的系统和方法
公开(公告)号：US5812204A
公开(公告)日：1998-09-22
申请号：US686008
申请日：1996-07-25
申请人： David C. Baker , Daniel P. Mulligan , Eric J. Schell
发明人： David C. Baker , Daniel P. Mulligan , Eric J. Schell
IPC分类号： H04N11/20 , G09G5/00 , G09G5/06 , G09G5/39 , G09G5/393 , G09G5/395 , H04N7/01 , H04N9/64 , H04N11/14 , H04N11/16
CPC分类号： H04N9/641 , G09G5/39 , G09G2310/04 , G09G2340/02 , G09G2340/125 , G09G5/06 , G09G5/393 , H04N11/14 , H04N11/16
摘要： A system and method for generating NTSC and PAL formatted composite video signals in a computer. Digital pixel data may be processed by software to form component video pixel data, which may include luminance and chrominance components. A chrominance look-up table is provided in a display memory and is used for modulation of the chrominance components in accordance with NTSC and/or PAL formats. The modulated components are then combined to form digital composite video pixel data which may be stored in a frame buffer in the display memory. Alternatively, a pixel clock frequency equal to an integer multiple of the carrier frequency may be used and modulation in accordance with the NTSC and PAL formats may be accomplished by inverting, setting to zero or leaving unmodified the chrominance components. The architecture of this system greatly reduces hardware complexity and bandwidth requirements. In addition, the process may be controlled by a media stream controller which is also adapted for audio and graphics processing. This allows the display memory and various other components to be shared by multiple media subsystems.
摘要翻译：一种用于在计算机中产生NTSC和PAL格式的复合视频信号的系统和方法。数字像素数据可以由软件处理以形成分量视频像素数据，其可以包括亮度和色度分量。在显示存储器中提供色度查找表，并且用于根据NTSC和/或PAL格式调制色度分量。然后将调制的分量组合以形成可以存储在显示存储器中的帧缓冲器中的数字复合视频像素数据。或者，可以使用等于载波频率的整数倍的像素时钟频率，并且可以通过反转，设置为零或不修改色度分量来实现根据NTSC和PAL格式的调制。该系统的架构大大降低了硬件复杂性和带宽要求。此外，该过程可以由也适用于音频和图形处理的媒体流控制器来控制。这允许显示存储器和各种其他组件由多个媒体子系统共享。

3. 发明授权

US5777601A System and method for generating video in a computer system 失效
标题翻译：用于在计算机系统中生成视频的系统和方法
公开(公告)号：US5777601A
公开(公告)日：1998-07-07
申请号：US687274
申请日：1996-07-25
申请人： David C. Baker , Daniel P. Mulligan , Eric J. Schell
发明人： David C. Baker , Daniel P. Mulligan , Eric J. Schell
IPC分类号： H04N11/20 , G09G5/00 , G09G5/06 , G09G5/39 , G09G5/393 , G09G5/395 , H04N7/01 , H04N9/64 , H04N11/14 , H04N11/16 , G09G5/02
CPC分类号： H04N9/641 , G09G5/39 , G09G2310/04 , G09G2340/02 , G09G2340/125 , G09G5/06 , G09G5/393 , H04N11/14 , H04N11/16
摘要： A system and method for generating composite video signals in a computer. Digital pixel data may be processed by software to form component video pixel data, which may include luminance and chrominance components. A chrominance look-up table is provided in a display memory and is used for modulation of the chrominance components. The modulated components are then combined to form digital composite video pixel data which may be stored in a frame buffer in the display memory. Video control information is precalculated and stored in the display memory in advance. The digital composite video pixel data and video control information are then recovered from the display memory to produce a formatted stream of video data. The architecture of this system greatly reduces hardware complexity and bandwidth requirements. In addition, the process may be controlled by a media stream controller which is also adapted for audio and graphics processing. This allows the display memory and various other components to be shared by multiple media subsystems.
摘要翻译：一种用于在计算机中产生复合视频信号的系统和方法。数字像素数据可以由软件处理以形成分量视频像素数据，其可以包括亮度和色度分量。在显示存储器中提供色度查找表，并用于色度分量的调制。然后将调制的分量组合以形成可以存储在显示存储器中的帧缓冲器中的数字复合视频像素数据。视频控制信息被预先计算并预先存储在显示存储器中。然后从显示存储器恢复数字复合视频像素数据和视频控制信息，以产生格式化的视频数据流。该系统的架构大大降低了硬件复杂性和带宽要求。此外，该过程可以由也适用于音频和图形处理的媒体流控制器来控制。这允许显示存储器和各种其他组件由多个媒体子系统共享。

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