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    Early error detection within an MPEG decoder
    1.
    发明授权
    Early error detection within an MPEG decoder 失效
    MPEG解码器内的早期错误检测

    公开(公告)号：US6052415A

    公开(公告)日：2000-04-18

    申请号：US922835

    申请日：1997-08-26

    申请人： Jeffery Dean Carr ,  Chuck Hong Ngai ,  Charles John Stein ,  Ronald Steven Svec

    发明人： Jeffery Dean Carr ,  Chuck Hong Ngai ,  Charles John Stein ,  Ronald Steven Svec

    IPC分类号： H04N19/89 ,  H04N7/32

    CPC分类号： H04N19/89

    摘要： An MPEG digital video decoder system, method and computer program product are presented for monitoring decoding of an encoded digital video signal for one or more predefined illegal conditions. Error detection logic is coupled to the variable length (VLC) decoder, inverse quantizer (IQ), inverse discrete cosine transformer (IDCT) and motion compensator (MC) of the decoder for detecting an illegal condition within at least one of the VLC decoder, IQ, IDCT and MC during decoding of the encoded digital video signal. The monitored illegal conditions can include a VLC/IQ control error, an IQ level overrun, and IQ/IDCT buffer error, an MC idle error and an MC macroblock start error. Error signals are reported to a central error register which is monitored periodically by the decoder's control processor. The control processor initiates recovery within the decoder system prior to stoppage of the system due to the illegal condition.

    摘要翻译： 提供MPEG数字视频解码器系统，方法和计算机程序产品，用于监视针对一个或多个预定非法条件的编码数字视频信号的解码。 错误检测逻辑耦合到解码器的可变长度（VLC）解码器，逆量化器（IQ），反相离散余弦变换器（IDCT）和运动补偿器（MC），用于检测VLC解码器， IQ，IDCT和MC在解码编码的数字视频信号期间。 监控的非法条件可能包括VLC / IQ控制错误，IQ级别溢出和IQ / IDCT缓冲区错误，MC空闲错误和MC宏块启动错误。 错误信号被报告给由解码器的控制处理器周期性地监视的中央错误寄存器。 由于非法情况，控制处理器在系统停止之前在解码器系统内启动恢复。

    Dual prime motion estimation system and method
    2.
    发明授权
    Dual prime motion estimation system and method 失效
    双质量运动估计系统和方法

    公开(公告)号：US6049362A

    公开(公告)日：2000-04-11

    申请号：US601486

    申请日：1996-02-14

    申请人： Adrian Stephen Butter ,  Charles John Stein ,  Ronald Steven Svec

    发明人： Adrian Stephen Butter ,  Charles John Stein ,  Ronald Steven Svec

    IPC分类号： H04N7/32 ,  G06T9/00 ,  H04N7/26 ,  H04N7/30 ,  H04N7/50

    CPC分类号： H04N19/86 ,  H04N19/105 ,  H04N19/112 ,  H04N19/137 ,  H04N19/139 ,  H04N19/149 ,  H04N19/159 ,  H04N19/172 ,  H04N19/176 ,  H04N19/196 ,  H04N19/197 ,  H04N19/503 ,  H04N19/51 ,  H04N19/527 ,  H04N19/61 ,  H04N19/146 ,  H04N19/152

    摘要： A method of and apparatus for identifying a Dual Prime motion estimation best match and generating motion vectors pertaining thereto for inter-picture video compression in a motion picture having images of F.sub.1 and F.sub.2 parities. The Dual Prime method of motion estimation described herein includes a method of generating motion vectors. The motion vectors point from a macroblock in a current field to a macroblock in a past field for inter-picture video compression in a motion picture having images of F.sub.1 and F.sub.2 parities. The first step in the method is defining a macroblock in a parity field of the current picture. Next, the preceding field of the same or opposite parity is searched to find a first best match macroblock in the preceding field. Once a best match macroblock is found, a vector is formed from the current macroblock in the current parity field to the first best match macroblock in the preceding parity field. This vector is scaled so that it refers to a second dual prime macroblock in the opposite parity field, that is the parity field of opposite parity with respect to the first best match macroblock which defines the center of a dual prime search window. Then, the average of the first best match macroblock and the set of second dual prime macroblocks in the dual prime search window is taken and the search window is searched to determine the best match dual prime macroblock. The search is typically conducted at half pixel locations inside a one square pixel dual prime search window. The appropriate dual prime motion vector and differential motion vector (dmv) are formed. These are motion vectors which point to both the first best match macroblock and the best match dual prime macroblock.

    摘要翻译： 用于识别双重素质运动估计的方法和装置在具有F1和F2奇偶校验的图像的运动图像中最佳地匹配并产生与其相关的用于画面间视频压缩的运动矢量。 本文描述的双重运动估计方法包括产生运动矢量的方法。 在具有F1和F2奇偶校验图像的运动图像中，运动矢量从当前场中的宏块指向用于画面间视频压缩的过去场中的宏块。 该方法的第一步是定义当前图像的奇偶校验字段中的宏块。 接下来，搜索相同或相反奇偶校验的前一个字段以找到前一字段中的第一最佳匹配宏块。 一旦找到了最佳匹配宏块，则从当前奇偶校验字段中的当前宏块到先前奇偶校验字段中的第一最佳匹配宏块形成向量。 该向量被缩放，使得它指向相对奇偶校验字段中的第二双优先宏块，即相对于定义双重搜索窗口的中心的第一最佳匹配宏块的相对奇偶校验的奇偶校验字段。 然后，获取双重搜索窗口中的第一最佳匹配宏块和第二双优先宏块的平均值，并搜索搜索窗口以确定最佳匹配双优先宏块。 搜索通常在一个正方形像素双重搜索窗口内的半个像素位置进行。 形成适当的双质量运动矢量和微分运动矢量（dmv）。 这些是指向第一最佳匹配宏块和最佳匹配双优先宏块的运动矢量。

    Video encoding method, system and computer program product for optimizing center of picture quality
    5.
    发明授权
    Video encoding method, system and computer program product for optimizing center of picture quality 失效
    视频编码方法，系统和计算机程序产品，用于优化图像质量中心

    公开(公告)号：US5920359A

    公开(公告)日：1999-07-06

    申请号：US858831

    申请日：1997-05-19

    申请人： Lawrence David Curley ,  Charles John Stein ,  Everett George Vail, III

    发明人： Lawrence David Curley ,  Charles John Stein ,  Everett George Vail, III

    IPC分类号： H04N7/30 ,  H04N7/26 ,  H04N7/32 ,  H04N7/36 ,  H04N7/50

    CPC分类号： H04N19/61 ,  H04N19/51 ,  H04N19/30

    摘要： A digital video encoding method, apparatus and computer program product are described with enhanced encoding of a picture having a plurality of macroblocks. The approach is to partition the picture into at least two regions and then to set or adjust at least one encoding parameter for each macroblock of the picture based upon the region of the picture within which the macroblock is located. As one specific implementation, the picture is partitioned into a center region and at least one outer region and the at least one encoding parameter is set to enhance picture quality in the center region at the expense of picture quality in the at least one outer region. The encoding parameter can, for example, be a motion estimation parameter, a quantization value, or a target bits per macroblock.

    摘要翻译： 使用具有多个宏块的图像的增强编码来描述数字视频编码方法，装置和计算机程序产品。 该方法是将图像划分为至少两个区域，然后基于宏块所在的图像的区域来设置或调整图像的每个宏块的至少一个编码参数。 作为一个具体实施方案，图像被划分为中心区域和至少一个外部区域，并且设置至少一个编码参数以牺牲至少一个外部区域中的图像质量的费用来增强中心区域中的图像质量。 编码参数可以例如是运动估计参数，量化值或每个宏块的目标比特。