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1. 发明授权

US07885339B2 Bi-directional temporal error concealment 有权
标题翻译：双向时间误差隐藏
公开(公告)号：US07885339B2
公开(公告)日：2011-02-08
申请号：US10990425
申请日：2004-11-17
申请人： Jiang Li , Keman Yu , Shipeng Li
发明人： Jiang Li , Keman Yu , Shipeng Li
IPC分类号： H04N7/12
CPC分类号： H04N19/577 , H04N19/895
摘要： Systems and methods for bi-directional temporal error concealment are described. In one aspect, a lost frame is detected during encoded video decoding operations. Bi-directional estimations for each pixel of the lost frame are calculated to generate a current frame for bi-directional temporal error concealment of the lost frame.
摘要翻译：描述了用于双向时间错误隐藏的系统和方法。在一个方面，在编码视频解码操作期间检测到丢帧。计算丢失帧的每个像素的双向估计，以产生用于丢失帧的双向时间误差隐藏的当前帧。

2. 发明申请

US20090284650A1 Bi-Level and Full-Color Video Combination for Video Communication 有权
标题翻译：视频通信的双层和全彩视频组合
公开(公告)号：US20090284650A1
公开(公告)日：2009-11-19
申请号：US12100744
申请日：2008-04-10
申请人： Keman Yu , Jiang Li , Shipeng Li
发明人： Keman Yu , Jiang Li , Shipeng Li
IPC分类号： H04N7/12 , H04J3/22 , H04L12/26 , H04L12/56 , H04N11/02
CPC分类号： H04L12/5602
摘要： Systems and methods for video communication are described. In one aspect, network bandwidth conditions are estimated. Bi-level or full-color video is then transmitted over the network at transmission bit rates that are controlled as a function of the estimated bandwidth conditions. To this end, network bandwidth capability is periodically probed to identify similar, additional, or decreased bandwidth capabilities as compared to the estimated bandwidth conditions. Decisions to hold, decrease, or increase the video transmission bit rate are made based on the estimated bandwidth conditions in view of the probing operations. When the transmission bit rate is increased or decreased, the transmission bit rate is calculated to target an upper or lower bit rate, both of which are indicated by the estimated bandwidth conditions. Bi-level video communication is switched to full-color video transmission, or vice versa, when the video transmission bit rate respectively reaches the upper bit rate or the lower bit rate.
摘要翻译：描述视频通信的系统和方法。在一个方面，估计网络带宽条件。然后以传输比特速率通过网络传输双电平或全色视频，该传输比特率作为估计的带宽条件的函数来控制。为此，与估计的带宽条件相比，周期性地探测网络带宽能力以识别类似的，附加的或降低的带宽能力。鉴于探测操作，基于估计的带宽条件进行保持，减少或增加视频传输比特率的决定。当传输比特率增加或减少时，传输比特率被计算为针对上限或更低比特率，两者都由估计的带宽条件指示。当视频传输比特率分别达到较高比特率或较低比特率时，双级视频通信切换到全色视频传输，反之亦然。

3. 发明授权

US07136066B2 System and method for scalable portrait video 有权
公开(公告)号：US07136066B2
公开(公告)日：2006-11-14
申请号：US10302653
申请日：2002-11-22
申请人： Jiang Li , Keman Yu , Tielin He , Yunfeng Lin , Shipeng Li
发明人： Jiang Li , Keman Yu , Tielin He , Yunfeng Lin , Shipeng Li
IPC分类号： G06T17/00
CPC分类号： H04N21/41407 , H04N7/147 , H04N7/148 , H04N7/173 , H04N19/00 , H04N19/169 , H04N21/234327 , H04N21/4788 , H04N21/6131
摘要： Generation, coding and transmission of an effective video form, scalable portrait video. As an expansion to bi-level video, portrait video is composed of more gray levels, and therefore possesses higher visual quality while it maintains a low bit rate and low computational costs. Portrait video is a scalable video in that each video with a higher level always contains all the information of the video with a lower level. The bandwidths of 2–4 level portrait videos fit into the bandwidth range of 20–40 Kbps that GPRS and CDMA 1X can stably provide. Therefore, portrait video is very promising for video broadcast and communication on 2.5 G wireless networks. With portrait video technology, this system and method is the first to enable two-way video conferencing on Pocket PCs and Handheld PCs.

4. 发明授权

US07088777B2 System and method for low bit rate watercolor video 失效
标题翻译：低比特率水彩画的系统和方法
公开(公告)号：US07088777B2
公开(公告)日：2006-08-08
申请号：US10302624
申请日：2002-11-22
申请人： Keman Yu , Jiang Li , Jizheng Xu , Shipeng Li
发明人： Keman Yu , Jiang Li , Jizheng Xu , Shipeng Li
IPC分类号： H04B1/66
CPC分类号： H04N19/159 , H04N19/186 , H04N19/61 , H04N19/90
摘要： A video compression/decompression procedure that provides a reliable, low bit video bit stream with some color features over relatively low bandwidth wireless networks. The procedure provides some pleasing color features in a video bit stream without needing a large bandwidth network like those needed for example for a MPEG 4 bit stream. The procedure provides the color features by using a bi-level Y luminance component and a number of UV chrominance combinations. The bi-level Y-component outlines the features of the image, while the UV-combinations describe the basic color information of the image.
摘要翻译：视频压缩/解压缩程序，通过相对低带宽的无线网络提供具有某些颜色特征的可靠的低位视频比特流。该过程在视频比特流中提供了一些令人愉快的颜色特征，而不需要像例如MPEG 4比特流所需的那样大的带宽网络。该过程通过使用双电平Y亮度分量和多个UV色度组合来提供颜色特征。双层Y组件概述了图像的特征，而UV组合描述了图像的基本颜色信息。

5. 发明申请

US20060056719A1 Variable block size early termination for video coding 失效
标题翻译：视频编码的可变块大小提前终止
公开(公告)号：US20060056719A1
公开(公告)日：2006-03-16
申请号：US10940168
申请日：2004-09-13
申请人： Keman Yu , Jiang Li , Shipeng Li
发明人： Keman Yu , Jiang Li , Shipeng Li
IPC分类号： G06K9/36
CPC分类号： H04N19/57 , H04N19/557
摘要： Systems and methods for variable block size early termination for video coding are described. In one aspect a set of thresholds are selected based on block sizes in a video encoding scheme. The thresholds include a respective threshold for each block size used by the encoding scheme. For each macroblock of multiple macroblocks in a video data sequence, blocks in the macroblock are evaluated in view of respective threshold(s) to determine if motion estimation operations can be terminated prior to evaluating remaining blocks in the macroblock.
摘要翻译：描述了用于视频编码的可变块大小提前终止的系统和方法。在一个方面，基于视频编码方案中的块大小来选择一组阈值。阈值包括由编码方案使用的每个块大小的相应阈值。对于视频数据序列中的多个宏块的每个宏块，考虑到相应的阈值来评估宏块中的块，以确定在评估宏块中的剩余块之前是否可以终止运动估计操作。

6. 发明申请

US20050256925A1 Mechanism for controlling a decentralized multi-party conference 有权
标题翻译：控制分散多方会议的机制
公开(公告)号：US20050256925A1
公开(公告)日：2005-11-17
申请号：US10837315
申请日：2004-04-30
申请人： Chong Luo , Jiang Li , Shipeng Li
发明人： Chong Luo , Jiang Li , Shipeng Li
IPC分类号： H04L12/18 , H04L29/06 , G06F15/16
CPC分类号： H04L12/1822 , H04L12/1854 , H04L65/4046
摘要： The techniques and mechanisms described herein are directed to controlling communication paths between conference members in a decentralized multi-party conference that supports a full mesh architecture. Several check points are tested in order to handle concurrency issues and to ensure quality of service. First, a check is made to determine whether any pending communication paths exist between the two systems. Second, a check is made to determine whether one of the systems is in the process of leaving the multi-party conference. Third, a check is made to determine whether a maximum number of conference members already exist in the conference. Upon failing any of these checks, the communication path between the two systems fails. Upon success, the new system initiates the joining process with each of the other members in the conference in order to maintain the full mesh architecture.
摘要翻译：本文描述的技术和机制旨在控制支持全网状架构的分散式多方会议中的会议成员之间的通信路径。测试了几个检查点，以处理并发问题并确保服务质量。首先，检查两个系统之间是否存在任何挂起的通信路径。第二，进行检查以确定其中一个系统是否正在离开多方会议。第三，进行检查以确定会议中是否已经存在最多会议成员。在任何这些检查失败之后，两个系统之间的通信路径失败。成功后，新系统将启动会议中每个其他成员的加入过程，以维护完整的网状结构。

7. 发明授权

US07552175B2 Mechanism for controlling communication paths between conference members 有权
标题翻译：控制会议成员通信路径的机制
公开(公告)号：US07552175B2
公开(公告)日：2009-06-23
申请号：US10837315
申请日：2004-04-30
申请人： Chong Luo , Jiang Li , Shipeng Li
发明人： Chong Luo , Jiang Li , Shipeng Li
IPC分类号： G06F15/16
CPC分类号： H04L12/1822 , H04L12/1854 , H04L65/4046
摘要： The techniques and mechanisms described herein are directed to controlling communication paths between conference members in a decentralized multi-party conference that supports a full mesh architecture. Several check points are tested in order to handle concurrency issues and to ensure quality of service. First, a check is made to determine whether any pending communication paths exist between the two systems. Second, a check is made to determine whether one of the systems is in the process of leaving the multi-party conference. Third, a check is made to determine whether a maximum number of conference members already exist in the conference. Upon failing any of these checks, the communication path between the two systems fails. Upon success, the new system initiates the joining process with each of the other members in the conference in order to maintain the full mesh architecture.
摘要翻译：本文描述的技术和机制旨在控制支持全网状架构的分散式多方会议中的会议成员之间的通信路径。测试了几个检查点，以处理并发问题并确保服务质量。首先，检查两个系统之间是否存在任何挂起的通信路径。第二，进行检查以确定其中一个系统是否正在离开多方会议。第三，进行检查，以确定会议中是否已经存在最多会议成员。在任何这些检查失败之后，两个系统之间的通信路径失败。成功后，新系统将启动会议中每个其他成员的加入过程，以维护完整的网状结构。

8. 发明授权

US07542600B2 Video image quality 有权
标题翻译：视频图像质量
公开(公告)号：US07542600B2
公开(公告)日：2009-06-02
申请号：US10970263
申请日：2004-10-21
申请人： Keman Yu , Jiang Li , Shipeng Li
发明人： Keman Yu , Jiang Li , Shipeng Li
IPC分类号： G06K9/00
CPC分类号： H04N9/646 , G06T5/009 , G06T5/40 , G06T7/90 , G06T2207/30201
摘要： Video image quality may be improved by correcting exposure levels and/or enhancing contrast amounts on each frame. One or more of the following phases may be implemented: skin-color model building, face detecting, exposure level correcting, and contrast enhancing. In a described implementation, a Gaussian skin-color model is built for each image frame during runtime. The Gaussian skin-color model is built with training pixels that are selected responsive to a defined skin color range, which is created offline from manually-selected skin pixels of multiple test sequences. In another described implementation, each pixel of an image frame is re-exposed using a ratio of contrast amount control variables (CACVs). More specifically, a pixel may be converted to a corresponding light intensity using a first CACV, and the corresponding light intensity may be reconverted to a pixel using a second CACV to enhance the contrast and possibly reduce fuzziness of the image frame.
摘要翻译：可以通过校正曝光水平和/或增强每帧上的对比度量来改善视频图像质量。可以实现以下阶段中的一个或多个：皮肤颜色模型构建，面部检测，曝光水平校正和对比度增强。在描述的实现中，在运行时间期间为每个图像帧构建高斯肤色模型。高斯肤色模型是用训练像素构建的，训练像素是响应于定义的皮肤颜色范围而选择的，这是由多个测试序列的手动选择的皮肤像素离线创建的。在另一描述的实现中，使用对比度量控制变量（CACV）的比率来重新曝光图像帧的每个像素。更具体地，可以使用第一CACV将像素转换为对应的光强度，并且可以使用第二CACV将对应的光强度重新转换为像素，以增强对比度并且可能降低图像帧的模糊性。

9. 发明申请

US20060198445A1 Prediction-based directional fractional pixel motion estimation for video coding 有权
$Prediction-based directional fractional pixel motion estimation for video coding$
公开(公告)号：US20060198445A1
公开(公告)日：2006-09-07
申请号：US11069795
申请日：2005-03-01
申请人： Jiang Li , Shipeng Li
发明人： Jiang Li , Shipeng Li
IPC分类号： H04N11/04 , H04N7/12 , H04B1/66 , H04N11/02
CPC分类号： H04N19/57 , H04N19/523 , H04N19/56
摘要： Motion-compensated video coding that employs prediction-based directional fractional pixel motion estimation is described. The fractional pixel motion estimation uses prediction-based searching and directional searching to search for candidate sub-pixel motion vectors oriented in a certain direction. With prediction-based searching, sub-pixel motion vectors are predicted using two techniques—median prediction and up-layer prediction. The search may be terminated early if a sub-pixel motion vector with sufficiently minimum cost is found. If prediction-based searching does not produce such a sub-pixel motion vector, the directional searching examines points in the predicted direction, rather than all eight possible neighboring points, to reduce the number of search points. Because the prediction-based directional fractional pixel motion estimation does not involve examination of neighboring integer pixel points, it can be used with any integer pixel motion estimation algorithm.

10. 发明申请

US20060190992A1 Facilitating Bi-directional communications between clients in heterogeneous network environments 审中-公开
标题翻译：促进异构网络环境中客户端之间的双向通信
公开(公告)号：US20060190992A1
公开(公告)日：2006-08-24
申请号：US11064928
申请日：2005-02-24
申请人： Jiang Li , Keman Yu , Shipeng Li
发明人： Jiang Li , Keman Yu , Shipeng Li
IPC分类号： H04L9/32
CPC分类号： H04L63/0272 , H04L29/12009 , H04L29/12424 , H04L29/12509 , H04L29/12528 , H04L61/2535 , H04L61/2567 , H04L61/2575
摘要： Techniques for facilitating bi-directional communications between clients in heterogeneous network environments are described. One technique registers a first client from a first network environment and a second client from a second different network environment. Responsive to the first client selecting the second client from a directory of registered clients, the technique forwards data from the first client to the second client and forwards data from the second client to the first client.
摘要翻译：描述了用于促进异构网络环境中的客户端之间的双向通信的技术。一种技术从第一网络环境注册第一客户端，并从第二不同网络环境注册第二客户端。响应于第一客户端从注册客户端的目录中选择第二客户端，该技术将数据从第一客户端转发到第二客户端，并将数据从第二客户端转发到第一客户端。

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