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21. 发明授权

US07770007B2 Method and system for integrating security mechanisms into session initiation protocol request messages for client-proxy authentication 有权
标题翻译：将安全机制集成到会话发起协议请求消息中进行客户端代理认证的方法和系统
公开(公告)号：US07770007B2
公开(公告)日：2010-08-03
申请号：US11757877
申请日：2007-06-04
申请人： Nikhil Bobde , Ann Demirtjis , Mu Han
发明人： Nikhil Bobde , Ann Demirtjis , Mu Han
IPC分类号： H04L9/32 , H04L29/06 , G06F17/00
CPC分类号： H04L63/123 , H04L29/06027 , H04L63/0807 , H04L63/0869 , H04L63/205 , H04L65/1006
摘要： A method and system is provided to integrate the Kerberos security mechanism into the message flow of the signaling operation under the Session Initiation Protocol to allow a SIP client and a SIP proxy to authenticate each other. When the SIP proxy receives an request message, such an INVITE request, from the SIP client, it responds with a challenge message indicating that authentication based on Kerberos is required.In response, the SIP client sends a second request message with a proxy authorization header containing authentication data, including a Kerberos server ticket for the Proxy, to allow the proxy to authenticate the client's user.
摘要翻译：提供了一种方法和系统，用于将Kerberos安全机制集成到会话发起协议下的信令操作的消息流中，以允许SIP客户端和SIP代理相互认证。当SIP代理从SIP客户端接收到这样一个INVITE请求的请求消息时，它响应一个询问消息，指示需要基于Kerberos的认证。作为响应，SIP客户端发送具有包含认证数据的代理授权报头的第二请求消息，包括用于代理的Kerberos服务器故障单，以允许代理对客户端的用户进行认证。

22. 发明授权

US07698365B2 Multipoint processing unit 有权
标题翻译：多点处理单元
公开(公告)号：US07698365B2
公开(公告)日：2010-04-13
申请号：US11838798
申请日：2007-08-14
申请人： Michael R. Van Buskirk , Philippe Ferriere , Mu Han
发明人： Michael R. Van Buskirk , Philippe Ferriere , Mu Han
IPC分类号： G06F15/16 , G06F15/173
CPC分类号： H04L65/4038 , H04L12/1822 , H04L65/103 , H04L65/104 , H04L65/605 , H04L69/08 , H04N7/152
摘要： A system to provide a multipoint processing terminal and a multicast bridging terminal to provide mixing, switching, and other processing of media streams under the control of H.323 components. Application Programming Interfaces defined for the multipoint processing terminal provide a multipoint control unit with the capability to change the default behavior of the multipoint processing terminal by allowing the multipoint control unit to control the routing audio and video streams in the multipoint processing terminal and control the media formats in a multipoint conference. Multipoint processing acceleration functionality is provided by providing interfaces to allow hardware accelerated implementations of multipoint processing terminals. The multicast bridging terminals enables clients using one type of control signaling and media streaming to join other conferences using different types of control signaling and media streaming by receiving audio or video data from an incoming media stream and performing any processing necessary to transform the media stream from the incoming stream data format to the outgoing stream data format.
摘要翻译：一种提供多点处理终端和组播桥接终端的系统，用于在H.323组件的控制下提供媒体流的混合，切换和其他处理。应用程序编程为多点处理终端定义的接口提供多点控制单元，具有通过允许多点控制单元控制多点处理终端中的路由音频和视频流并控制媒体的能力来改变多点处理终端的默认行为的能力多点会议中的格式。通过提供允许多点处理终端的硬件加速实现的接口来提供多点处理加速功能。组播桥接终端使得客户端能够使用一种类型的控制信令和媒体流来使用不同类型的控制信令和媒体流来连接其他会议，通过从传入的媒体流接收音频或视频数据，并执行将媒体流从输入流数据格式为输出流数据格式。

23. 发明申请

US20070165838A1 Selective glitch detection, clock drift compensation, and anti-clipping in audio echo cancellation 有权
标题翻译：选择性毛刺检测，时钟漂移补偿和音频回声消除中的抗剪辑
公开(公告)号：US20070165838A1
公开(公告)日：2007-07-19
申请号：US11332500
申请日：2006-01-13
申请人： Qin Li , Chao He , Wei-Ge Chen , Mu Han
发明人： Qin Li , Chao He , Wei-Ge Chen , Mu Han
IPC分类号： A61F11/06 , H04M9/08 , G10K11/16 , H03B29/00
CPC分类号： H04M9/082
摘要： The quality and robustness of audio echo cancellation is enhanced by selectively applying glitch recovery processes based on a quality measurement of the relative offset between capture and render audio streams. For example, large and small glitch detection is enabled for low relative offset variance; large glitch detection is enabled in a medium range of relative offset variance; and neither enabled at high variance. Further, a fast glitch recovery process suspends updating the adaptive filter coefficients of the audio echo cancellation while buffers are re-aligned to recover from the glitch, so as to avoid resetting the adaptive filter. When clock drift exists between capture and render audio streams, a multi-step compensation method is applied to improve AEC output quality in case the drifting rate is low; and a resampler is used to compensate the drift in case the drifting rate is high. An anti-clipping process detects clipping of the signals, and also suspends adaptive filter updating during clipping.
摘要翻译：通过基于捕获和渲染音频流之间的相对偏移的质量测量来选择性地应用毛刺恢复过程来增强音频回声消除的质量和鲁棒性。例如，对于低相对偏移方差，启用大的和小的毛刺检测; 在相对偏移方差的中等范围内启用大毛刺检测; 并且在高方差时都不启用。此外，快速毛刺恢复处理暂停更新音频回声消除的自适应滤波器系数，同时缓冲器被重新对准以从毛刺恢复，以避免复位自适应滤波器。当捕获和渲染音频流之间存在时钟漂移时，应用多步补偿方法来提高漂移率低的AEC输出质量; 并且在漂移速率高的情况下使用重采样器来补偿漂移。反剪辑过程检测信号的剪辑，并且还可以在剪辑期间暂停自适应滤波器更新。

24. 发明申请

US20050228651A1 Robust real-time speech codec 有权
标题翻译：强大的实时语音编解码器
公开(公告)号：US20050228651A1
公开(公告)日：2005-10-13
申请号：US10816466
申请日：2004-03-31
申请人： Tian Wang , Hosam Khalil , Kazuhito Koishida , Wei-Ge Chen , Mu Han
发明人： Tian Wang , Hosam Khalil , Kazuhito Koishida , Wei-Ge Chen , Mu Han
IPC分类号： G10L11/06 , G10L19/08
CPC分类号： G10L19/08 , G10L19/005 , G10L19/22
摘要： Various strategies for rate/quality control and loss resiliency in an audio codec are described. The various strategies can be used in combination or independently. For example, a real-time speech codec uses intra frame coding/decoding, adaptive multi-mode forward error correction [“FEC”], and rate/quality control techniques. Intra frames help a decoder recover quickly from packet losses, while compression efficiency is still emphasized with predicted frames. Various strategies for inserting intra frames and signaling intra/predicted frames are described. With the adaptive multi-mode FEC, an encoder adaptively selects between multiple modes to efficiently and quickly provide a level of FEC that takes into account the bandwidth currently available for FEC. The FEC information itself may be predictively encoded and decoded relative to primary encoded information. Various rate/quality and FEC control strategies allow additional adaptation to available bandwidth and network conditions.
摘要翻译：描述了音频编解码器中的速率/质量控制和丢失弹性的各种策略。各种策略可以组合使用或独立使用。例如，实时语音编解码器使用帧内编码/解码，自适应多模式前向纠错[“FEC”]和速率/质量控制技术。帧内帧帮助解码器从分组丢失中快速恢复，而预测帧仍然强调压缩效率。描述了用于插入帧内和信令帧内/预测帧的各种策略。利用自适应多模式FEC，编码器在多种模式之间自适应地选择以有效且快速地提供考虑到当前可用于FEC的带宽的FEC级别。 FEC信息本身可以相对于主编码信息进行预测编码和解码。各种速率/质量和FEC控制策略允许对可用带宽和网络条件进行额外的调整。

25. 发明授权

US08380790B2 Video conference rate matching 有权
标题翻译：视频会议速率匹配
公开(公告)号：US08380790B2
公开(公告)日：2013-02-19
申请号：US12334969
申请日：2008-12-15
申请人： Ming Chieh Lee , Mu Han , Tim Moore
发明人： Ming Chieh Lee , Mu Han , Tim Moore
IPC分类号： G06F13/00
CPC分类号： H04N7/15 , H04L12/1827 , H04N21/25833 , H04N21/44029 , H04N21/4788 , H04N21/6377 , H04N21/658
摘要： Video conference rate matching may be provided. A video conference server may receive video source streams from clients on a video conference. The server may analyze each client's capabilities and choose a video stream to send to each client based on those capabilities. For example, a client capable of encoding and decoding a high definition video stream may provide three source video streams—a high definition stream, a medium resolution stream, and a low resolution stream. The server may send only the low resolution stream to a client with a low amount of available bandwidth. The server may send the medium resolution stream to another client with sufficient bandwidth for the high definition stream, but which lacks the ability to decode the high definition stream.
摘要翻译：可以提供视频会议速率匹配。视频会议服务器可以在视频会议上从客户接收视频源流。服务器可以分析每个客户端的功能，并根据这些功能选择一个视频流来发送给每个客户端。例如，能够对高分辨率视频流进行编码和解码的客户端可以提供三个源视频流 - 高清晰度流，中分辨率流和低分辨率流。服务器只能将低分辨率流发送到具有低可用带宽的客户端。服务器可以向具有足够带宽的高清晰度流的另一个客户端发送媒体分辨率流，但是缺少解码高分辨率流的能力。

26. 发明授权

US08321506B2 Architecture for an extensible real-time collaboration system 有权
标题翻译：可扩展实时协作系统架构
公开(公告)号：US08321506B2
公开(公告)日：2012-11-27
申请号：US10918855
申请日：2004-08-14
申请人： Mu Han , Krishnamurthy Ganesan , Adrian Potra , Nikhil Bobde
发明人： Mu Han , Krishnamurthy Ganesan , Adrian Potra , Nikhil Bobde
IPC分类号： G06F15/16 , H04Q11/00
CPC分类号： H04L65/1006 , G06F9/54 , H04L29/06 , H04L29/06027 , H04L65/403
摘要： An architecture for an extensible real-time collaboration system is provided. The architecture presents a unified application program interface for writing application programs that use communications protocols. The architecture has activity objects, endpoint objects, and multiple media stacks. These objects may use various communications protocols, such as Session Initiation Protocol or Real-Time Transport Protocol to send and receive messages. The activity objects, endpoint objects, and multiple media stacks may each have one or more APIs that an application developer can use to access or provide collaboration-related functionality. These objects map the API to the underlying implementation provided by other objects. Using the activity objects enables a developer to provide less application logic than would otherwise be necessary to provide complex collaboration services.
摘要翻译：提供了可扩展实时协作系统的架构。该架构提供了一个统一的应用程序界面，用于编写使用通信协议的应用程序。该架构具有活动对象，端点对象和多个媒体堆栈。这些对象可以使用各种通信协议，例如会话发起协议或实时传输协议来发送和接收消息。活动对象，端点对象和多个媒体堆栈可以各自具有应用开发者可以用来访问或提供协作相关功能的一个或多个API。这些对象将API映射到其他对象提供的底层实现。使用活动对象使开发人员能够提供比提供复杂协作服务所必需的更少的应用程序逻辑。

27. 发明申请

US20100125455A1 AUDIO ENCODING AND DECODING WITH INTRA FRAMES AND ADAPTIVE FORWARD ERROR CORRECTION 审中-公开
标题翻译：音频编码和解码与内部框架和自适应前向错误校正
公开(公告)号：US20100125455A1
公开(公告)日：2010-05-20
申请号：US12692417
申请日：2010-01-22
申请人： Tian Wang , Hosam A. Khalil , Kazuhito Koishida , Wei-Ge Chen , Mu Han
发明人： Tian Wang , Hosam A. Khalil , Kazuhito Koishida , Wei-Ge Chen , Mu Han
IPC分类号： G10L19/08
CPC分类号： G10L19/08 , G10L19/005 , G10L19/22
摘要： Various strategies for rate/quality control and loss resiliency in an audio codec are described. The various strategies can be used in combination or independently. For example, a real-time speech codec uses intra frame coding/decoding, adaptive multi-mode forward error correction [“FEC”], and rate/quality control techniques. Intra frames help a decoder recover quickly from packet losses, while compression efficiency is still emphasized with predicted frames. Various strategies for inserting intra frames and signaling intra/predicted frames are described. With the adaptive multi-mode FEC, an encoder adaptively selects between multiple modes to efficiently and quickly provide a level of FEC that takes into account the bandwidth currently available for FEC. The FEC information itself may be predictively encoded and decoded relative to primary encoded information. Various rate/quality and FEC control strategies allow additional adaptation to available bandwidth and network conditions.
摘要翻译：描述了音频编解码器中的速率/质量控制和丢失弹性的各种策略。各种策略可以组合使用或独立使用。例如，实时语音编解码器使用帧内编码/解码，自适应多模式前向纠错[“FEC”]和速率/质量控制技术。帧内帧帮助解码器从分组丢失中快速恢复，而预测帧仍然强调压缩效率。描述了用于插入帧内和信令帧内/预测帧的各种策略。利用自适应多模式FEC，编码器在多种模式之间自适应地选择以有效且快速地提供考虑到当前可用于FEC的带宽的FEC级别。 FEC信息本身可以相对于主编码信息进行预测编码和解码。各种速率/质量和FEC控制策略允许对可用带宽和网络条件进行额外的调整。

28. 发明授权

US07668712B2 Audio encoding and decoding with intra frames and adaptive forward error correction 有权
标题翻译：音频编码和解码与帧内和自适应前向纠错
公开(公告)号：US07668712B2
公开(公告)日：2010-02-23
申请号：US10816466
申请日：2004-03-31
申请人： Tian Wang , Hosam A. Khalil , Kazuhito Koishida , Wei-Ge Chen , Mu Han
发明人： Tian Wang , Hosam A. Khalil , Kazuhito Koishida , Wei-Ge Chen , Mu Han
IPC分类号： G10L19/00
CPC分类号： G10L19/08 , G10L19/005 , G10L19/22
摘要： Various strategies for rate/quality control and loss resiliency in an audio codec are described. The various strategies can be used in combination or independently. For example, a real-time speech codec uses intra frame coding/decoding, adaptive multi-mode forward error correction [“FEC”], and rate/quality control techniques. Intra frames help a decoder recover quickly from packet losses, while compression efficiency is still emphasized with predicted frames. Various strategies for inserting intra frames and signaling intra/predicted frames are described. With the adaptive multi-mode FEC, an encoder adaptively selects between multiple modes to efficiently and quickly provide a level of FEC that takes into account the bandwidth currently available for FEC. The FEC information itself may be predictively encoded and decoded relative to primary encoded information. Various rate/quality and FEC control strategies allow additional adaptation to available bandwidth and network conditions.
摘要翻译：描述了音频编解码器中的速率/质量控制和丢失弹性的各种策略。各种策略可以组合使用或独立使用。例如，实时语音编解码器使用帧内编码/解码，自适应多模式前向纠错[“FEC”]和速率/质量控制技术。帧内帧帮助解码器从分组丢失中快速恢复，而预测帧仍然强调压缩效率。描述了用于插入帧内和信令帧内/预测帧的各种策略。利用自适应多模式FEC，编码器在多种模式之间自适应地选择以有效且快速地提供考虑到当前可用于FEC的带宽的FEC级别。 FEC信息本身可以相对于主编码信息进行预测编码和解码。各种速率/质量和FEC控制策略允许对可用带宽和网络条件进行额外的调整。

29. 发明申请

US20080005246A1 MULTIPOINT PROCESSING UNIT 有权
标题翻译：多点加工单元
公开(公告)号：US20080005246A1
公开(公告)日：2008-01-03
申请号：US11838798
申请日：2007-08-14
申请人： Michael VanBuskirk , Philippe Ferriere , Mu Han
发明人： Michael VanBuskirk , Philippe Ferriere , Mu Han
IPC分类号： G06F15/16 , G06F3/00
CPC分类号： H04L65/4038 , H04L12/1822 , H04L65/103 , H04L65/104 , H04L65/605 , H04L69/08 , H04N7/152
摘要： A system to provide a multipoint processing terminal and a multicast bridging terminal to provide mixing, switching, and other processing of media streams under the control of H.323 components. Application Programming Interfaces defined for the multipoint processing terminal provide a multipoint control unit with the capability to change the default behavior of the multipoint processing terminal by allowing the multipoint control unit to control the routing audio and video streams in the multipoint processing terminal and control the media formats in a multipoint conference. Multipoint processing acceleration functionality is provided by providing interfaces to allow hardware accelerated implementations of multipoint processing terminals. The multicast bridging terminals enables clients using one type of control signaling and media streaming to join other conferences using different types of control signaling and media streaming by receiving audio or video data from an incoming media stream and performing any processing necessary to transform the media stream from the incoming stream data format to the outgoing stream data format.
摘要翻译：一种提供多点处理终端和组播桥接终端的系统，用于在H.323组件的控制下提供媒体流的混合，切换和其他处理。应用程序编程为多点处理终端定义的接口提供多点控制单元，具有通过允许多点控制单元控制多点处理终端中的路由音频和视频流并控制媒体的能力来改变多点处理终端的默认行为的能力多点会议中的格式。通过提供允许多点处理终端的硬件加速实现的接口来提供多点处理加速功能。组播桥接终端使得客户端能够使用一种类型的控制信令和媒体流来使用不同类型的控制信令和媒体流来连接其他会议，通过从传入的媒体流接收音频或视频数据，并执行将媒体流从输入流数据格式为输出流数据格式。

30. 发明授权

US07257641B1 Multipoint processing unit 有权
标题翻译：多点处理单元
公开(公告)号：US07257641B1
公开(公告)日：2007-08-14
申请号：US09539026
申请日：2000-03-30
申请人： Michael R. VanBuskirk , Philippe Ferriere , Mu Han
发明人： Michael R. VanBuskirk , Philippe Ferriere , Mu Han
IPC分类号： G06F15/173 , G06F15/16
CPC分类号： H04L65/4038 , H04L12/1822 , H04L65/103 , H04L65/104 , H04L65/605 , H04L69/08 , H04N7/152
摘要： A system to provide a multipoint processing terminal and a multicast bridging terminal to provide mixing, switching, and other processing of media streams under the control of H.323 components. Application Programming Interfaces defined for the multipoint processing terminal provide a multipoint control unit with the capability to change the default behavior of the multipoint processing terminal by allowing the multipoint control unit to control the routing audio and video streams in the multipoint processing terminal and control the media formats in a multipoint conference. Multipoint processing acceleration functionality is provided by providing interfaces to allow hardware accelerated implementations of multipoint processing terminals. The multicast bridging terminals enables clients using one type of control signaling and media streaming to join other conferences using different types of control signaling and media streaming by receiving audio or video data from an incoming media stream and performing any processing necessary to transform the media stream from the incoming stream data format to the outgoing stream data format.
摘要翻译：一种提供多点处理终端和组播桥接终端的系统，用于在H.323组件的控制下提供媒体流的混合，切换和其他处理。应用程序编程为多点处理终端定义的接口提供多点控制单元，具有通过允许多点控制单元控制多点处理终端中的路由音频和视频流并控制媒体的能力来改变多点处理终端的默认行为的能力多点会议中的格式。通过提供允许多点处理终端的硬件加速实现的接口来提供多点处理加速功能。组播桥接终端使得客户端能够使用一种类型的控制信令和媒体流来使用不同类型的控制信令和媒体流来连接其他会议，通过从传入的媒体流接收音频或视频数据，并执行将媒体流从输入流数据格式为输出流数据格式。

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