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1. 发明授权

US5282272A Interrupt distribution scheme for a computer bus 失效
标题翻译：计算机总线的中断分配方案
公开(公告)号：US5282272A
公开(公告)日：1994-01-25
申请号：US10486
申请日：1993-01-28
申请人： Charles B. Guy , Sudarshan B. Cadambi , Michael J. Gutmann , Narjala Bhasker , Jim R. Trethewey , Brian J. McArdle
发明人： Charles B. Guy , Sudarshan B. Cadambi , Michael J. Gutmann , Narjala Bhasker , Jim R. Trethewey , Brian J. McArdle
IPC分类号： G06F9/48 , G06F9/46
CPC分类号： G06F9/4812
摘要： A method of handling processor to processor interrupt requests in a multiprocessing computer bus environment is described. This method allows a multiple-tiered, increasing priority, interrupt request scheme. This method also allows processor to processor directed interrupt requests, processor to one processor of a group of processors interrupt requests, and processor to all processors of a group of processors interrupt requests.
摘要翻译：描述了在多处理计算机总线环境中处理处理器处理器中断请求的方法。这种方法允许多层次，优先级高的中断请求方案。这种方法还允许处理器对处理器定向的中断请求，处理器到一组处理器的一组处理器中断请求，以及处理器到一组处理器的所有处理器中断请求。

2. 发明授权

US5852472A Method and apparatus for connecting video sources and video sinks 失效
标题翻译：用于连接视频源和视频接收器的方法和装置
公开(公告)号：US5852472A
公开(公告)日：1998-12-22
申请号：US535541
申请日：1995-09-28
申请人： Rama R. Prasad , Michael J. Gutmann , Stephen S. Ing
发明人： Rama R. Prasad , Michael J. Gutmann , Stephen S. Ing
IPC分类号： H04N5/30
CPC分类号： H04N5/268 , H04N7/148
摘要： A method for creating a video connection between a video source for transmitting frames of video data and a video sink for receiving the frames. The video source may be a file, a camera, a computer network, and a telephony interface. The video sink may be a file, a visual display device, a computer network, and a telephony interface. The video source has a recycle framehandler function for recycling used buffers and the video sink has a process framehandler function for processing received frames. A video stream object is created having data members that include a reference to the video sink and a reference to the video source, as well as several member functions. The member functions are used to query the video sink to obtain a reference to the process framehandler function and to then provide the reference to the video source. The member functions are also used to query the video source to obtain a reference to the recycle framehandler function, which is then provided to the video sink. The reference to the process framehandler function is stored as a data member of a first framehandler object to be used by the video source, and the reference to the recycle framehandler function is stored as a data member of a second framehandler object to be used by the video sink. The video source may then directly invoke the process framehandler function and the video sink may directly invoke the recycle framehandler function.
摘要翻译：一种用于在用于发送视频数据帧的视频源和用于接收帧的视频宿之间创建视频连接的方法。视频源可以是文件，照相机，计算机网络和电话接口。视频接收器可以是文件，视觉显示设备，计算机网络和电话接口。视频源具有用于回收所使用的缓冲器的再循环框架处理器功能，并且视频接收器具有处理接收帧的处理框架处理器功能。创建具有包括对视频接收器的引用和对视频源的引用的数据成员以及若干成员功能的视频流对象。成员函数用于查询视频接收器以获得对过程帧处理器功能的引用，然后提供对视频源的引用。成员函数还用于查询视频源以获取对回收框架处理程序功能的引用，然后将其提供给视频接收器。对过程框架处理器功能的引用存储为要由视频源使用的第一框架处理器对象的数据成员，并且对循环框架处理器功能的引用被存储为第二框架处理器对象的数据构件，以被视频接收器然后，视频源可以直接调用处理帧处理器功能，并且视频接收器可以直接调用回收帧处理器功能。

3. 发明授权

US06263020B1 Method and apparatus for bit rate control in a digital video system 失效
标题翻译：数字视频系统中比特率控制的方法和装置
公开(公告)号：US06263020B1
公开(公告)日：2001-07-17
申请号：US08773043
申请日：1996-12-24
申请人： Thomas R. Gardos , Karl O. Lillevold , Stephen Ing , Doug Brucks , Michael J. Gutmann , Key Phomsopha
发明人： Thomas R. Gardos , Karl O. Lillevold , Stephen Ing , Doug Brucks , Michael J. Gutmann , Key Phomsopha
IPC分类号： H04N712
CPC分类号： H04N19/156 , H04N19/115 , H04N19/126 , H04N19/149 , H04N19/15 , H04N19/152 , H04N19/172 , H04N19/176 , H04N19/61
摘要： In a video image compression and transmission system, quantization parameters for a block transform based video compression algorithm can be controlled by a quantizer selector so as to control compressed video frame size. The selection of the appropriate quantization parameter for the nth macroblock of a current frame is based on the cumulative number of compressed bits appearing in the first n-1 macroblocks of a current frame and a previous frame. By controlling the quantization parameter is such a manner, the overall system reacts more quickly to changes in complexity in the video sequence and allocates bits more accurately to different parts of the video frame according to a past history of bit allocation. To efficiently utilize the bandwidth of a transmission medium (such as POTS), a bit count of the contents of the transmit buffer is sent to a buffer regulator in a video controller where it is compared to a low water mark threshold. If the bit count falls below the threshold, an uncompressed video frame is scheduled for compression by a video compressor. By using the low water mark threshold, latency in the overall system is reduced and an efficient use of transmission medium bandwidth is achieved.
摘要翻译：在视频图像压缩和传输系统中，用于基于块变换的视频压缩算法的量化参数可以由量化器选择器来控制，以便控制压缩的视频帧大小。当前帧的第n个宏块的适当量化参数的选择是基于出现在当前帧和先前帧的前n-1个宏块中的压缩比特的累积数目。通过控制量化参数是这样一种方式，整个系统对视频序列的复杂度的变化更快地做出反应，并且根据比特分配的过去历史将比特更精确地分配给视频帧的不同部分。为了有效地利用传输介质（例如POTS）的带宽，将发送缓冲器的内容的位计数发送到视频控制器中的缓冲器调节器，在该控制器中将其与低水位阈值进行比较。如果位计数低于阈值，则未压缩的视频帧被调度以供视频压缩器压缩。通过使用低水位阈值，可以降低整个系统的延迟，实现传输媒体带宽的有效利用。

4. 发明授权

US5996008A Method and apparatus for providing still images in a full motion video communication session using the same full motion video communication protocol 失效
标题翻译：用于使用相同的全运动视频通信协议在全运动视频通信会话中提供静止图像的方法和装置
公开(公告)号：US5996008A
公开(公告)日：1999-11-30
申请号：US723573
申请日：1996-09-30
申请人： Thomas R. Gardos , Michael J. Gutmann , C. Chris Hansen , Stephen S. Ing
发明人： Thomas R. Gardos , Michael J. Gutmann , C. Chris Hansen , Stephen S. Ing
IPC分类号： H04N7/14 , H04N7/10
CPC分类号： H04N7/14 , H04N7/147
摘要： An apparatus is programmed with a video service for facilitating video communication with another remote apparatus, in accordance with a video communication protocol. The video service includes a still image function with logic for providing a plurality of progressive scans of one or more still images to the remote apparatus, in accordance with a still image communication protocol defined within the video communication protocol. In one embodiment, the still image function includes logic for instructing a local video capture driver to switch to a format of the still image function's choice for capturing video image frames, holding constant video image input to a video codec to generate the plurality of progressive scans of the still images, and implementing the still image communication protocol.
摘要翻译：根据视频通信协议，装置用视频服务进行编程，以促进与另一远程装置的视频通信。视频服务包括具有逻辑的静止图像功能，用于根据在视频通信协议内定义的静止图像通信协议向远程设备提供一个或多个静止图像的多个逐行扫描。在一个实施例中，静止图像功能包括用于指示本地视频捕获驱动器切换到静止图像功能用于捕获视频图像帧的选择的格式的逻辑，将恒定的视频图像输入保持为视频编解码器以产生多个逐行扫描的静止图像，并实现静止图像通信协议。

5. 发明授权

US5608450A Video conferencing system with fast packet loss recovery 失效
标题翻译：具有快速丢包恢复功能的视频会议系统
公开(公告)号：US5608450A
公开(公告)日：1997-03-04
申请号：US614331
申请日：1996-03-12
申请人： Rohit Agarwal , Michael J. Gutmann
发明人： Rohit Agarwal , Michael J. Gutmann
IPC分类号： H04N7/14 , H04N7/15 , H04N19/895
CPC分类号： H04N7/15 , H04N19/503 , H04N19/895 , H04N7/147
摘要： A video system is disclosed that provides fast communication packet loss recovery. A source node generates a series of encoded video flames for a series of digitally sampled video flames by encoding each digitally sampled video frame relative to either an immediately preceding digitally sampled video frame or a previous digitally sampled video frame specified by a lost frame message received over the communication link from a destination node. The destination node receives the encoded video frames over the communication link and transfers the lost frame message to the source node if one of the encoded video frames is lost or delayed. The destination node generates the decoded version of each encoded video frame relative to either a decoded version of an immediately preceding encoded video frame or a decoded version of a last successfully received encoded video frame.
摘要翻译：公开了提供快速通信分组丢失恢复的视频系统。源节点通过相对于紧接在前的数字采样视频帧或由接收到的丢失帧消息指定的先前数字采样视频帧对每个数字采样视频帧进行编码，为一系列数字采样视频火焰生成一系列编码视频火焰来自目的地节点的通信链路。目的地节点通过通信链路接收经编码的视频帧，并且如果编码视频帧之一丢失或延迟，则将丢失的帧消息传送到源节点。目的地节点相对于紧接在前的编码视频帧的解码版本或最后成功接收的编码视频帧的解码版本生成每个编码视频帧的解码版本。

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