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1. 发明授权

US07583849B2 Lossless image compression with tree coding of magnitude levels 有权
标题翻译：无损图像压缩与树编码的幅度级别
公开(公告)号：US07583849B2
公开(公告)日：2009-09-01
申请号：US11189235
申请日：2005-07-25
申请人： Hua Cai , Jiang Li
发明人： Hua Cai , Jiang Li
IPC分类号： G06K9/46 , G06K9/68 , G06K9/70 , G06F17/00
CPC分类号： H04N19/63 , H04N19/13 , H04N19/647 , Y10S707/99942
摘要： Data values, such as residual values based on a predictive value, are compressed based on a number of significant digits used to represent the data value that is termed a magnitude level. Data values are grouped, and a highest magnitude level of the magnitude levels associated with each of the data values is associated with each group. The magnitude level is expressible in fewer digits than a value of that magnitude. Further, selecting one magnitude level for each group reduces a number of magnitude levels stored, further reducing the size of the resulting file. Choosing a magnitude level associated with a group of related data values in most cases results in the highest magnitude level being close to the magnitude level for each of the data values it represents, resulting in few bits being wasted in coding the data values.
摘要翻译：基于用于表示被称为幅度级别的数据值的有效数字的数量，压缩基于预测值的残差值的数据值。数据值被分组，并且与每个数据值相关联的幅度级别的最高幅度级别与每个组相关联。幅度水平可以以比该幅度的值更少的数字表示。此外，为每个组选择一个幅度级别减少存储的数量级数，进一步减小所得文件的大小。在大多数情况下，选择与一组相关数据值相关联的幅度电平导致最高幅度电平接近其表示的每个数据值的幅度电平，从而导致数据值的编码中少量位被浪费。

2. 发明授权

US07512261B2 System and method for calibrating multiple cameras without employing a pattern by inter-image homography 失效
标题翻译：用于校准多个摄像机的系统和方法，而不通过图像间单张照相采用图案
公开(公告)号：US07512261B2
公开(公告)日：2009-03-31
申请号：US10923150
申请日：2004-08-19
申请人： Jianguang Lou , Jiang Li , Hua Cai
发明人： Jianguang Lou , Jiang Li , Hua Cai
IPC分类号： G06K9/00
CPC分类号： G06K9/209 , G06T7/80
摘要： Interactive multi-view video presents new types of video capture systems, video formats, video compression algorithms, and services. Many video cameras are allocated to capture an event from various related locations and directions. The captured videos are compressed in control PCs and are sent to a server in real-time. Users can subscribe to a new type of service that allows users to connect to the servers and receive multi-view videos interactively. In one embodiment of the invention, an automatic pattern-free calibration tool is employed to calibrate the multiple cameras. In contrast with a pattern-based method which uses the correspondences between image points and pattern points, the pattern-free calibration method is based on the correspondences between image points from different views.
摘要翻译：交互式多视图视频呈现新型的视频捕获系统，视频格式，视频压缩算法和服务。许多摄像机被分配以捕获来自各种相关位置和方向的事件。捕获的视频在控制PC中被压缩，并被实时发送到服务器。用户可以订阅一种新的服务类型，允许用户连接到服务器并以交互方式接收多视图视频。在本发明的一个实施例中，采用自动无花纹校准工具来校准多个照相机。与使用图像点和图案点之间的对应关系的基于图案的方法相比，无图案校准方法基于来自不同视图的图像点之间的对应关系。

3. 发明申请

US20080219345A1 Streaming Media Codec with Transform Coefficient Bounding 有权
标题翻译：流媒体编解码器与变换系数边界
公开(公告)号：US20080219345A1
公开(公告)日：2008-09-11
申请号：US11682684
申请日：2007-03-06
申请人： Jiang Li , Hua Cai
发明人： Jiang Li , Hua Cai
IPC分类号： H04B1/66
CPC分类号： H04L65/607 , H04N19/61
摘要： A streaming media codec may include a collection of media stream processing modules arranged into a processing graph. One or more of the modules may perform a Fourier-related transform, and a significant fraction of media stream processing may occur post-transform. The media stream may be considered as a sequence of processing blocks, and post-transform processing blocks contain transform coefficients. Such transform coefficients are amenable to classification into processing classes. Some processing classes may require significantly less processing effort than others by post-transform processing modules. Such transform coefficient classes may be efficiently specified, for example, with coefficient bounding rectangles, and the specification provided to one or more post-transform streaming media processing modules to enable the modules to allocate their processing resources more effectively. Streaming media processing modules making effective use of the transform coefficient class information, and streaming media codecs that incorporate them, are called transform coefficient bounding (TCB) enhanced.
摘要翻译：流媒体编解码器可以包括布置在处理图中的媒体流处理模块的集合。一个或多个模块可以执行傅立叶相关变换，并且在变换后可能发生很大一部分媒体流处理。媒体流可以被认为是一系列处理块，后变换处理块包含变换系数。这种变换系数适合于分类为处理类。通过后变换处理模块，某些处理类可能需要比其他处理类更少的处理能力。可以例如利用系数边界矩形有效地指定这种变换系数类，并且将规范提供给一个或多个后变换流媒体处理模块，以使得模块能够更有效地分配其处理资源。使用有效利用变换系数类信息的流媒体处理模块和结合它们的流媒体编解码器被称为增强的变换系数边界（TCB）。

4. 发明申请

US20080172384A1 Epipolar geometry-based motion estimation for multi-view image and video coding 有权
标题翻译：用于多视图图像和视频编码的基于双极几何的运动估计
公开(公告)号：US20080172384A1
公开(公告)日：2008-07-17
申请号：US11653587
申请日：2007-01-16
申请人： Hua Cai , Jian-guang Lou , Jiang Li
发明人： Hua Cai , Jian-guang Lou , Jiang Li
IPC分类号： G06F7/10 , G06F7/38 , G06F15/00 , G06F17/30
CPC分类号： G06T7/292 , G06T7/238 , G06T2207/10016 , G06T2207/20088
摘要： 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.
摘要翻译：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。

5. 发明申请

US20080085058A1 Color image coding using inter-color correlation 失效
标题翻译：彩色图像编码采用色间相关
公开(公告)号：US20080085058A1
公开(公告)日：2008-04-10
申请号：US11543576
申请日：2006-10-05
申请人： Hua Cai , Jiang Li
发明人： Hua Cai , Jiang Li
IPC分类号： G06K9/00 , G06K9/36 , G06K9/46
CPC分类号： H04N19/182 , H04N19/13 , H04N19/136 , H04N19/186 , H04N19/593
摘要： Described is an image compression technology by which a coefficient representative of a chrominance component corresponding to an (x, y) coordinate pair is coded into a symbol, along with plurality of context events associated with that symbol, to facilitate more efficient context-based arithmetic coding. For example, four context events may be generated, including one context event based on the corresponding (x, y) coefficient value in the luminance component, and three context events based on other luminance coefficients that have adjacent horizontal, vertical and diagonal relationships with the corresponding luminance component's coefficient, respectively. In one example implementation, coding the chrominance coefficient and computing the plurality of context events occurs in a zero coding pass of an entropy coder. A sign coding pass and a magnitude refinement pass may be performed to obtain further symbols for the context-based arithmetic coding.
摘要翻译：描述了一种图像压缩技术，通过该技术，表示对应于（x，y）坐标对的色度分量的系数与多个与该符号相关联的上下文事件一起编码为符号，以促进更有效的基于上下文的算术编码。例如，可以生成四个上下文事件，包括基于亮度分量中的对应（x，y）系数值的一个上下文事件，以及基于与其相关的其他亮度系数的三个上下文事件，这些亮度系数与分别对应亮度分量系数。在一个示例实现中，对色度系数进行编码并计算多个上下文事件发生在熵编码器的零编码遍中。可以执行符号编码遍和幅度细化遍以获得用于基于上下文的算术编码的另外的符号。

6. 发明申请

US20070122046A1 Layer-based context quantization with context partitioning 失效
标题翻译：基于层次的上下文量化与上下文分区
公开(公告)号：US20070122046A1
公开(公告)日：2007-05-31
申请号：US11287054
申请日：2005-11-25
申请人： Hua Cai , Jiang Li
发明人： Hua Cai , Jiang Li
IPC分类号： G06K9/36
CPC分类号： H04N19/91 , H04N19/13 , H04N19/196 , H04N19/30 , H04N19/46 , H04N19/463 , H04N19/60 , H04N19/63
摘要： Conditioning states are selected for coding a source from a plurality of potential conditioning states. The potential conditioning states represent a series of context events, such as a plurality of binary context events. According to a rule, potential conditioning states are partitioned into groups, such as by partitioning the potential conditioning states according to the number or significant context events in each of the conditioning states. The conditioning states within each of the groups are then collected into layers, and then the conditioning states in the layer are quantized to form a next layer of collective conditioning states. Coding efficiency indicators, such as context quantization efficiencies, are calculated for each of the layers. Based on the context quantization efficiencies, layers in each of the groups are selected for use in a context model for coding the source.
摘要翻译：选择调节状态用于从多个潜在调节状态对源编码。潜在的调理状态表示一系列的上下文事件，诸如多个二进制上下文事件。根据规则，潜在的调理状态被划分成组，例如通过根据每个调节状态中的数量或重要的上下文事件划分潜在的调节状态。然后将每个组内的调理状态收集到层中，然后将层中的调节状态量化以形成下一层的集体调理状态。为每个层计算编码效率指标，例如上下文量化效率。基于上下文量化效率，选择每个组中的层用于用于对源编码的上下文模型。

7. 发明申请

US20070103558A1 Multi-view video delivery 审中-公开
标题翻译：多视图视频传送
公开(公告)号：US20070103558A1
公开(公告)日：2007-05-10
申请号：US11267768
申请日：2005-11-04
申请人： Hua Cai , Jian-Guang Lou , Jiang Li
发明人： Hua Cai , Jian-Guang Lou , Jiang Li
IPC分类号： H04N5/232 , G06F3/00 , G06F13/00 , H04N5/45 , H04N5/445
CPC分类号： H04N5/222 , H04N5/144 , H04N5/20 , H04N5/2627 , H04N21/21805 , H04N21/2668
摘要： The present example provides a system for delivering video streams with multi-view effects. Single-view video streams, each associated with a particular view, are provided by a server. A client may select to receive any of the single-view video streams. The server is further configured to generate a multi-view video stream from frames in the single-view video streams. The multi-view video stream may include visual effects and may be provided to the client to enhance the user experience. The visual effects may include frozen moment and view sweeping.
摘要翻译：本示例提供了一种用于传送具有多视图效果的视频流的系统。每个与特定视图相关联的单视图视频流由服务器提供。客户端可以选择接收任何单视图视频流。服务器还被配置为从单视图视频流中的帧生成多视点视频流。多视点视频流可以包括视觉效果，并且可以提供给客户端以增强用户体验。视觉效果可能包括冻结时刻和扫视。

8. 发明授权

US07903894B2 Color image coding using inter-color correlation 失效
标题翻译：彩色图像编码采用色间相关
公开(公告)号：US07903894B2
公开(公告)日：2011-03-08
申请号：US11543576
申请日：2006-10-05
申请人： Hua Cai , Jiang Li
发明人： Hua Cai , Jiang Li
IPC分类号： G06K9/46
CPC分类号： H04N19/182 , H04N19/13 , H04N19/136 , H04N19/186 , H04N19/593
摘要： Described is an image compression technology by which a coefficient representative of a chrominance component corresponding to an (x, y) coordinate pair is coded into a symbol, along with plurality of context events associated with that symbol, to facilitate more efficient context-based arithmetic coding. For example, four context events may be generated, including one context event based on the corresponding (x, y) coefficient value in the luminance component, and three context events based on other luminance coefficients that have adjacent horizontal, vertical and diagonal relationships with the corresponding luminance component's coefficient, respectively. In one example implementation, coding the chrominance coefficient and computing the plurality of context events occurs in a zero coding pass of an entropy coder. A sign coding pass and a magnitude refinement pass may be performed to obtain further symbols for the context-based arithmetic coding.
摘要翻译：描述了一种图像压缩技术，通过该技术，表示对应于（x，y）坐标对的色度分量的系数与多个与该符号相关联的上下文事件一起编码为符号，以促进更有效的基于上下文的算术编码。例如，可以生成四个上下文事件，包括基于亮度分量中的对应（x，y）系数值的一个上下文事件，以及基于与其相关的其他亮度系数的三个上下文事件，这些亮度系数与分别对应亮度分量系数。在一个示例实现中，对色度系数进行编码并计算多个上下文事件发生在熵编码器的零编码遍中。可以执行符号编码遍和幅度细化遍以获得用于基于上下文的算术编码的另外的符号。

9. 发明申请

US20080112315A1 PEER-TO-PEER AIDED LIVE VIDEO SHARING SYSTEM 有权
标题翻译：同行对讲直播视频共享系统
公开(公告)号：US20080112315A1
公开(公告)日：2008-05-15
申请号：US11558878
申请日：2006-11-10
申请人： Yusuo Hu , Chong Luo , Jian Tang , Jian-Guang Lou , Hua Cai , Jiang Li
发明人： Yusuo Hu , Chong Luo , Jian Tang , Jian-Guang Lou , Hua Cai , Jiang Li
IPC分类号： G08C15/00
CPC分类号： H04N21/2743 , H04L67/104 , H04L67/1072 , H04L67/1085 , H04N7/17318 , H04N21/21 , H04N21/23 , H04N21/4788 , H04N21/632
摘要： Video data from an upload client is received at a hosting node. A request from a download client is received at a bootstrapping node to receive the video data. The download client to receive the video data directly from the hosting node when the hosting node is below a threshold, wherein the threshold is based at least in part on the maximum number of download clients the hosting node can stream to simultaneously. The download client to receive the video data from peers in a peer-to-peer overlay when the hosting node above the threshold.
摘要翻译：在主机节点接收来自上传客户端的视频数据。在自举节点处接收来自下载客户端的请求以接收视频数据。所述下载客户端在所述主机节点低于阈值时直接从所述主机节点接收所述视频数据，其中所述阈值至少部分地基于所述主机节点可以同时流式传输的下载客户端的最大数目。当主机节点高于阈值时，下载客户端从点对点覆盖中的对等端接收视频数据。

10. 发明申请

US20070279265A1 Image Coding with Scalable Context Quantization 有权
标题翻译：图像编码与可扩展上下文量化
公开(公告)号：US20070279265A1
公开(公告)日：2007-12-06
申请号：US11771030
申请日：2007-06-29
申请人： Hua Cai , Jiang Li
发明人： Hua Cai , Jiang Li
IPC分类号： H03M7/00
CPC分类号： H04N19/126 , H04N19/146 , H04N19/593 , H04N19/647
摘要： A scalable quantizer is generated from a plurality of context models for each of a plurality of bit rates used in coding a source. A context model for a lower bit rate quantizes conditioning states when there is no compression gain in coding the image using child conditioning states in the higher bit rate context model over a parent conditioning state to which they may be quantized. The scalable quantizer includes a basic context model for a lowest anticipated bit rate and enhancement bits indicating how to adapt the basic context model to derive context models for higher bit rates. For image data transformed with embedded wavelet coding, context events are selected from corresponding or neighboring pixels at different resolutions and in different bit planes, and the order of the context events is optimized to reduce conditional entropy between the context events and the current value.
摘要翻译：对于用于编码源的多个比特率中的每一个，从多个上下文模型生成可扩展量化器。当在较高比特率上下文模型中使用子调理状态在其可被量化的父条件状态下，当在图像编码中没有压缩增益时，较低比特率的上下文模型量化调节状态。可扩展量化器包括用于最低预期比特率的基本上下文模型和指示如何使基本上下文模型适应以导出更高比特率的上下文模型的增强比特。对于使用嵌入式小波编码变换的图像数据，从不同分辨率和不同位平面中的相应或相邻像素选择上下文事件，并优化上下文事件的顺序以减少上下文事件与当前值之间的条件熵。

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