专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 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。

2. 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。

3. 发明申请

US20050140674A1 System and method for scalable portrait video 有权
标题翻译：可缩放人像视频的系统和方法
公开(公告)号：US20050140674A1
公开(公告)日：2005-06-30
申请号：US11067554
申请日：2005-02-25
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： H04N7/14 , H04N7/173 , H04N7/26 , G06K9/36
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 1× can stably provide. Therefore, portrait video is very promising for video broadcast and communication on 2.5G 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.
摘要翻译：生成，编码和传输有效的视频格式，可缩放的肖像视频。作为双级视频的扩展，纵向视频由更多的灰度级组成，因此拥有更高的视觉质量，同时保持较低的比特率和低的计算成本。肖像视频是一个可扩展的视频，每个具有更高级别的视频始终包含具有较低级别的视频的所有信息。 2-4级画像视频的带宽适应GPRS和CDMA 1x可以稳定提供的20-40 Kbps的带宽范围。因此，肖像视频对于2.5G无线网络上的视频广播和通信非常有希望。利用肖像视频技术，该系统和方法是率先在掌上电脑和掌上电脑上实现双向视频会议的方法。

4. 发明申请

US20090110065A1 System and method for scalable portrait video 审中-公开
公开(公告)号：US20090110065A1
公开(公告)日：2009-04-30
申请号：US12288281
申请日：2008-10-17
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： H04N7/12
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.

5. 发明申请

US20080159409A1 Low Complexity Real-time Video Coding 有权
标题翻译：低复杂度实时视频编码
公开(公告)号：US20080159409A1
公开(公告)日：2008-07-03
申请号：US12047837
申请日：2008-03-13
申请人： Keman Yu , Jiang Li , Shipeng Li
发明人： Keman Yu , Jiang Li , Shipeng Li
IPC分类号： H04N7/64
CPC分类号： H04N19/533 , H04N19/132 , H04N19/136 , H04N19/176 , H04N19/184 , H04N19/186 , H04N19/61
摘要： In a first exemplary media implementation, one or more processor-accessible media include processor-executable instructions that, when executed, direct a device to perform actions including: comparing an accuracy indicator to at least one threshold, the accuracy indicator corresponding to a reference macroblock selected for a target macroblock; ascertaining a refinement case from multiple refinement cases based on the comparing, each refinement case of the multiple refinement cases defining multiple test points in relation to the reference macroblock; and analyzing the ascertained refinement case with regard to the target macroblock. In a second exemplary media implementation, one or more media include processor-executable instructions that, when executed, direct a device to perform actions including: determining if two chrominance sums have magnitudes that are each less than a first product and four luminance sums have magnitudes that are each less than a second product; and if so, forwarding all zero values for a macroblock.
摘要翻译：在第一示例性媒体实现中，一个或多个处理器可访问媒体包括处理器可执行指令，其在被执行时指示设备执行动作，包括：将精度指示符与至少一个阈值进行比较，对应于参考宏块为目标宏块选择; 基于所述比较确定来自多个细化情况的细化情况，所述多个细化情况相对于所述参考宏块定义多个测试点的多个细化情况的每个细化情况; 并且针对目标宏块分析确定的细化情况。在第二示例性媒体实现中，一个或多个媒体包括处理器可执行指令，其在被执行时指示设备执行动作，包括：确定两个色度和是否具有小于第一乘积的量值，并且四个亮度和具有大小每个都不到第二个产品; 如果是，转发宏块的所有零值。

6. 发明授权

US07359004B2 Bi-level and full-color video combination for video communication 有权
标题翻译：双级和全色视频组合，用于视频通信
公开(公告)号：US07359004B2
公开(公告)日：2008-04-15
申请号：US10445310
申请日：2003-05-23
申请人： Keman Yu , Jiang Li , Shipeng Li
发明人： Keman Yu , Jiang Li , Shipeng Li
IPC分类号： H04N7/12 , 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。

7. 发明申请

US20050069035A1 Low-complexity 2-power transform for image/video compression 有权
标题翻译：用于图像/视频压缩的低复杂度2功率变换
公开(公告)号：US20050069035A1
公开(公告)日：2005-03-31
申请号：US10674932
申请日：2003-09-30
申请人： Shan Lu , Keman Yu , Jiang Li , Shipeng Li
发明人： Shan Lu , Keman Yu , Jiang Li , Shipeng Li
IPC分类号： G06F17/14 , H04N7/30 , H04N7/12
CPC分类号： H04N19/60 , G06F17/147
摘要： To encode image and video data using a transform having low computational complexity and high compression efficiency, all elements of the matrix can be expressed with power-of-2 elements, with a template of the matrix approximating a DCT matrix.
摘要翻译：为了使用具有低计算复杂度和高压缩效率的变换来对图像和视频数据进行编码，矩阵的所有元素可以用2的幂来表示，矩阵的模板近似于DCT矩阵。

8. 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。

9. 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。

10. 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.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式