公开(公告)号：US5903261A

公开(公告)日：1999-05-11

申请号：US666960

申请日：1996-06-20

申请人： Bruce E. Walsh ,  John Herdrich ,  William Smith ,  Mark E. Vrabel ,  Philip Borghesani ,  Christine G. Hagberg ,  Karen Champagne

发明人： Bruce E. Walsh ,  John Herdrich ,  William Smith ,  Mark E. Vrabel ,  Philip Borghesani ,  Christine G. Hagberg ,  Karen Champagne

IPC分类号： G09G5/00 ,  G09G5/36 ,  G09G5/39 ,  G09G5/397 ,  H04N5/44 ,  H04N7/26 ,  H04N9/64

CPC分类号： G09G5/397 ,  H04N19/00 ,  G09G2310/0224 ,  G09G2340/02 ,  G09G2340/125 ,  G09G5/006 ,  G09G5/363 ,  H04N5/4401 ,  H04N9/641

摘要： A computer based system for displaying and compressing video including a video capture card with a video compressor and a bus interface circuit that acts as a busmaster and outputs uncompressed video and compressed video to a computer bus for display of the uncompressed video on the computer monitor and storage of the compressed video on a memory of the computer. The system also includes a software virtual interrupt generator that uses timer events provided by a computer system service and a transfer status indicator to generate interrupts to initiate transfer of a new block of video; an overlay controller implemented in software that transfers video from the video capture card over the computer bus to a graphics subsystem for display in a window on the computer monitor in an overlay mode; a display controller implemented in software that causes display of uncompressed video from the video capture card or software decompressed video; a software controller that compresses audio in software and sends video data to be compressed across the computer bus to the compressor; a controller that is implemented in software and calibrates startup delay of the audio input subsystem and uses the delay to synchronize the audio and video; and a user interactive input mechanism for adjusting the rates of compression within a range of acceptable rates that varies as a function of the output target medium for compressed video.

摘要翻译： 一种用于显示和压缩视频的基于计算机的系统，包括具有视频压缩器的视频采集卡和用作总线主管的总线接口电路，并将未压缩视频和压缩视频输出到计算机总线，以在计算机监视器上显示未压缩视频， 将压缩的视频存储在计算机的存储器上。 该系统还包括一个软件虚拟中断发生器，它使用由计算机系统服务提供的定时器事件和传输状态指示器来产生中断以启动新的视频块的传送; 以软件实现的覆盖控制器，其通过计算机总线将视频从视频采集卡传送到图形子系统，以覆盖模式在计算机监视器上的窗口中显示; 以软件实现的显示控制器，其显示来自视频采集卡或软件解压缩视频的未压缩视频; 软件控制器，用软件压缩音频，并将压缩在计算机总线上的视频数据发送到压缩器; 软件实现的控制器，并校准音频输入子系统的启动延迟，并使用延迟来同步音频和视频; 以及用户调整压缩率的用户交互输入机制，该压缩率在可压缩视频的输出目标介质的函数变化的可接受速率范围内。

公开(公告)号：US06539087B1

公开(公告)日：2003-03-25

申请号：US09715906

申请日：2000-11-17

申请人： Bruce E. Walsh ,  Philip J. Baun, Jr. ,  Robert S. Horne ,  Paul P. Martel ,  John T. Watson

发明人： Bruce E. Walsh ,  Philip J. Baun, Jr. ,  Robert S. Horne ,  Paul P. Martel ,  John T. Watson

IPC分类号： H04M342

CPC分类号： H04M3/56 ,  H04M3/568

摘要： According to the principles of the invention, there is provided a conferencing system that dynamically assigns calls to DSP resources. The system may attempt to process each audio conference on a single DSP node, so that information about conference participants does not need to be shared across DSP nodes. Further, the mapping of call channels to resources within a DSP node may be automated so that it is transparent to a conferencing system control application. Where more than one DSP node is required for a particular conference, there is further provided a system for linking DSP nodes. There are also provided methods for managing audio conferencing resources.

摘要翻译： 根据本发明的原理，提供了一种动态地分配对DSP资源的呼叫的会议系统。 该系统可以尝试在单个DSP节点上处理每个音频会议，使得不需要在DSP节点之间共享关于会议参与者的信息。 此外，呼叫信道到DSP节点内的资源的映射可以是自动的，使得它对于会议系统控制应用是透明的。 在特定会议需要多于一个DSP节点的情况下，还提供了用于链接DSP节点的系统。 还提供了管理音频会议资源的方法。