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    • 86. 发明申请
    • System and method for accurate rate control for video compression
    • 用于视频压缩的精确速率控制的系统和方法
    • US20070223576A1
    • 2007-09-27
    • US11389402
    • 2006-03-24
    • Wai-tian TanBo Shen
    • Wai-tian TanBo Shen
    • H04N11/04H04B1/66
    • H04N19/17H04N19/124H04N19/146H04N19/172H04N19/176
    • A method and system for encoding a video frame. The method includes grouping macroblocks of a video frame into a plurality of groups and determining a first encoding rate for at least one of the plurality of groups based on at least one quantization parameter value associated with the group. The method further includes determining a distortion value associated with the first encoding rate and determining a distortion reduction density value based on the distortion value and the first encoding rate. The method further includes accessing a rate budget associated with the frame and adjusting simultaneously a plurality of quantization parameter values associated with one or more of the plurality of groups.
    • 一种用于编码视频帧的方法和系统。 该方法包括将视频帧的宏块分组成多个组,并且基于与组相关联的至少一个量化参数值来确定多个组中的至少一个组的第一编码率。 该方法还包括确定与第一编码率相关联的失真值,并且基于失真值和第一编码率确定失真减小密度值。 该方法还包括访问与帧相关联的速率预算,并同时调整与多个组中的一个或多个组相关联的多个量化参数值。
    • 90. 发明授权
    • Method and apparatus for a multi-user video navigation system
    • 多用户视频导航系统的方法和装置
    • US06956902B2
    • 2005-10-18
    • US09977099
    • 2001-10-11
    • Bo ShenSusie Wee
    • Bo ShenSusie Wee
    • H04N7/26H04N7/50H04N7/18
    • H04N21/4312H04N19/107H04N19/134H04N19/17H04N19/176H04N19/61H04N21/2187H04N21/234363H04N21/23439H04N21/4314
    • A method for video navigation. Specifically, one embodiment of the present invention discloses a method of video presentation whereby multiple users can each view and navigate cropped windows of a live-captured or stored video sequence in compressed form. A video sequence is captured from a stationary camera. An uncompressed version and compressed version following a compression format are captured. In response to user requests, cropped windows can be navigated from one location to another within the dimensions of the video sequence. For each cropped window, data from the compressed and compressed versions are combined to generate a portion of the video sequence that is in the same compression format. Whenever possible, data from the compressed version is used, and data from the uncompressed version is substituted when necessary to generate each portion of video sequence. Transmission of each portion of video sequence to the various requesting client devices occurs contemporaneously.
    • 视频导航方法。 具体地,本发明的一个实施例公开了一种视频呈现方法,其中多个用户可以以压缩形式每个视图和导航实时捕获或存储的视频序列的裁剪窗口。 视频序列是从固定相机拍摄的。 捕获压缩格式之后的未压缩版本和压缩版本。 响应于用户请求,裁剪的窗口可以在视频序列的维度内从一个位置导航到另一个位置。 对于每个裁剪的窗口,来自压缩和压缩版本的数据被组合以产生具有相同压缩格式的视频序列的一部分。 只要有可能,使用来自压缩版本的数据,并且在必要时替换来自未压缩版本的数据以生成视频序列的每个部分。 视频序列的每个部分向各种请求客户端设备的传输同时发生。