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    • 4. 发明申请
    • Epipolar geometry-based motion estimation for multi-view image and video coding
    • 用于多视图图像和视频编码的基于双极几何的运动估计
    • US20080172384A1
    • 2008-07-17
    • US11653587
    • 2007-01-16
    • Hua CaiJian-guang LouJiang Li
    • Hua CaiJian-guang LouJiang Li
    • G06F7/10G06F7/38G06F15/00G06F17/30
    • G06T7/292G06T7/238G06T2207/10016G06T2207/20088
    • Described is fast motion estimation based upon epipolar geometry, which can be used in compressing multi-view video. An epipolar line is computed based on a point (e.g., a centroid point) in a macroblock to be predicted, and a temporary starting point in an image is determined, such as a median predicted search center. A search starting point is further determined based on the temporary starting point and the epipolar line, e.g., a point on the epipolar line corresponding to an intersecting line that is projected orthogonally from the temporary point to the epipolar line. A motion estimation mechanism searches the search space to produce a motion vector. The search may be conducted starting at the search starting point in a reduced search area located around the epipolar line, e.g., a local diamond search and/or rotated unsymmetrical rood-pattern search.
    • 描述了基于对极几何的快速运动估计,可用于压缩多视图视频。 基于要预测的宏块中的点(例如,质心点)计算核线,并且确定图像中的临时起始点,诸如中值预测搜索中心。 基于临时起点和核线,进一步确定搜索起始点,例如对应于从临时点到对极线正交投影的相交线的对极线上的点。 运动估计机制搜索搜索空间以产生运动矢量。 搜索可以在位于核线附近的缩小搜索区域的搜索起点开始进行,例如本地菱形搜索和/或旋转的不对称轮廓图案搜索。
    • 9. 发明申请
    • Lecture Capture and Broadcast System
    • 讲座拍摄和广播系统
    • US20100186056A1
    • 2010-07-22
    • US12357627
    • 2009-01-22
    • Fan LiJian-guang LouYusuo HuQingwei LinJiang Li
    • Fan LiJian-guang LouYusuo HuQingwei LinJiang Li
    • H04N7/173
    • H04N21/2187G06Q10/00G09B5/06G09B5/065H04N7/15H04N21/4788
    • An end-to-end lecture broadcast system (LBS) is described. The LBS system typically comprises three modules: a schedule module, a capture module and a transmission module. The schedule module is comprised of a scheduler that is implemented as a software add-on on the lecture host's computing device, a schedule server, and a schedule agent component in the uploading peer to provide for channel based management. The capture module is comprised of a video camera for capturing video content, one or more microphones for capturing audio content, and a VGA signal capture for capturing presentation materials. The transmission module is comprised of an uploading peer and a web server. The uploading peer is responsible for transmitting video/audio content to the Internet/intranet using peer-to-peer (P2P) streaming technology. The web server is responsible for the delivery of captured presentation materials and for ensuring the synchronous play back of video/audio content and presentation materials.
    • 描述了端到端讲座广播系统(LBS)。 LBS系统通常包括三个模块:调度模块,捕获模块和传输模块。 该调度模块包括一个调度器,该调度程序被实现为演讲主机的计算设备上的软件附件,调度服务器和上传对等体中的调度代理组件,以提供基于频道的管理。 捕获模块包括用于捕获视频内容的摄像机,用于捕获音频内容的一个或多个麦克风,以及用于捕获演示材料的VGA信号捕获。 传输模块由上传对等体和Web服务器组成。 上传对等体负责使用点对点(P2P)流技术将视频/音频内容传输到互联网/内部网。 Web服务器负责传送捕获的演示资料,并确保视频/音频内容和演示资料的同步播放。
    • 10. 发明申请
    • Network Address Translators (NAT) Type Detection Techniques
    • 网络地址转换器(NAT)类型检测技术
    • US20100146099A1
    • 2010-06-10
    • US12328296
    • 2008-12-04
    • Qingwei LinJiang LiJian-guang LouYusuo HuFan Li
    • Qingwei LinJiang LiJian-guang LouYusuo HuFan Li
    • G06F15/173
    • H04L67/104H04L29/12339H04L41/12H04L43/50H04L61/2503H04L69/28
    • Techniques described herein enable peers to determine each peer's NAT type much more efficiently and quickly than when compared with existing techniques. To do so, a peer simultaneously sends multiple test messages to a server. The peer then waits to either receive a response for each of the multiple test messages or may store an indication that no response has been received after a predetermined timeout period. The peer then analyzes the received responses and/or the stored timeout indications to determine the peer's NAT type or to determine that the peer is operating free from concealment by a NAT/firewall device. By simultaneously sending the multiple test messages, the peer may determine the NAT type within a maximum time defined by the predetermined timeout period or a roundtrip time period that is required for communication between the peer and the server. As such, the tools allow for efficient NAT-type detection.
    • 本文描述的技术使得对等体能够比与现有技术相比更有效和快速地确定每个对等体的NAT类型。 为此,对等体同时向服务器发送多个测试消息。 然后,对等体等待接收多个测试消息中的每一个的响应,或者可以存储在预定的超时时段之后没有接收到响应的指示。 对等体然后分析接收到的响应和/或存储的超时指示以确定对等体的NAT类型或者确定对等体正在从NAT /防火墙设备的隐藏中运行。 通过同时发送多个测试消息,对等体可以在由对等体和服务器之间的通信所需的预定超时时间段或往返时间周期限定的最大时间内确定NAT类型。 因此,这些工具允许有效的NAT类型检测。