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1. 发明申请

WO2006001994A3 HYBRID VARIABLE LENGTH CODING FOR VIDEO COMPRESSION 审中-公开
标题翻译：混合可变长度编码视频压缩
公开(公告)号：WO2006001994A3
公开(公告)日：2007-11-01
申请号：PCT/US2005020110
申请日：2005-06-08
申请人： CISCO TECH INC , CHEN WEN-HSIUNG , WU FANG , PELTON GREGORY D , TOEBES JOHN A , ROSENFELD DOV
发明人： CHEN WEN-HSIUNG , WU FANG , PELTON GREGORY D , TOEBES JOHN A , ROSENFELD DOV
IPC分类号： G06K9/36 , G06K9/46 , H03M7/00 , H03M7/40
CPC分类号： H03M7/40 , H04N19/91 , H04N19/93
摘要： A method for variable length coding an ordered series of digital signals, e.g., of quantized transform coefficients of a block of image data with a most likely-to-occur amplitude, e.g., O, and at least one other amplitude, e.g., 1, to form a set of codewords. The method includes establishing a breakpoint (301) along the ordering to define a first contiguous region and a second contiguous region, such that clusters of consecutive signals of any value other than the most likely-to-occur value occur mostly in the first contiguous region. The method includes encoding the signals in the first region using a first region encoding method (303) suitable for encoding clusters; and encoding the signals in the second region using a second region encoding method (305). The first region and second region encoding methods include variable length codes such that relatively short codewords are formed to represent relatively more likely-to-occur sequences.
摘要翻译：一种用于可变长度编码有序序列数字信号的方法，例如，具有最可能发生的幅度的图像数据块的量化变换系数，例如O，以及至少一个其它振幅，例如1，以形成一组码字。该方法包括沿着排序建立断点（301）以定义第一连续区域和第二连续区域，使得除了最可能出现的值之外的任何值的连续信号的群集主要出现在第一邻接区域。该方法包括使用适于编码簇的第一区域编码方法（303）对第一区域中的信号进行编码; 以及使用第二区域编码方法（305）对所述第二区域中的信号进行编码。第一区域和第二区域编码方法包括可变长度代码，使得形成相对较短的码字以表示相对更可能发生的序列。

2. 发明申请

WO2006001994A2 HYBRID VARIABLE LENGTH CODING FOR VIDEO COMPRESSION 审中-公开
标题翻译：混合可变长度编码视频压缩
公开(公告)号：WO2006001994A2
公开(公告)日：2006-01-05
申请号：PCT/US2005/020110
申请日：2005-06-08
申请人： CISCO TECHNOLOGY, INC. , CHEN, Wen-Hsiung , WU, Fang , PELTON, Gregory, D. , TOEBES, John, A. , ROSENFELD, Dov
发明人： CHEN, Wen-Hsiung , WU, Fang , PELTON, Gregory, D. , TOEBES, John, A. , ROSENFELD, Dov
IPC分类号： G06K9/36 , H03M7/34
CPC分类号： H03M7/40 , H04N19/91 , H04N19/93
摘要： A method for variable length coding an ordered series of digital signals, e.g., of quantized transform coefficients of a block of image data with a most likely-to-occur amplitude, e.g., 0, and at least one other amplitude, e.g., 1, to form a set of codewords. The method includes establishing a breakpoint along the ordering to define a first contiguous region and a second contiguous region, such that clusters of consecutive signals of any value other than the most likely-to-occur value occur mostly in the first contiguous region. The method includes encoding the signals in the first region using a first region encoding method suitable for encoding clusters; and encoding the signals in the second region using a second region encoding method. The first region and second region encoding methods include variable length codes such that relatively short codewords are formed to represent relatively more likely-to-occur sequences.
摘要翻译：一种用于可变长度编码有序序列数字信号的方法，例如，具有最可能发生的幅度的图像数据块的量化变换系数，例如0和至少一个其它振幅，例如1，以形成一组码字。该方法包括沿着排序建立断点以定义第一连续区域和第二连续区域，使得除了最可能出现的值之外的任何值的连续信号的群集主要出现在第一邻接区域中。该方法包括使用适于编码簇的第一区域编码方法对第一区域中的信号进行编码; 以及使用第二区域编码方法对所述第二区域中的信号进行编码。第一区域和第二区域编码方法包括可变长度代码，使得形成相对较短的码字以表示相对更可能发生的序列。

3. 发明申请

WO2004105398A1 COMBINED RUNLENGTH CODING AND VARIABLE LENGTH CODING FOR VIDEO COMPRESSION 审中-公开
标题翻译：组合运行长度编码和可变长度编码视频压缩
公开(公告)号：WO2004105398A1
公开(公告)日：2004-12-02
申请号：PCT/US2004/006485
申请日：2004-03-03
申请人： CISCO TECHNOLOGY, INC. , CHEN, Wen-hsiung , WU, Fang , PELTON, Gregory, D.
发明人： CHEN, Wen-hsiung , WU, Fang , PELTON, Gregory, D.
IPC分类号： H04N7/30
CPC分类号： H03M7/40 , H04N19/13 , H04N19/60 , H04N19/61 , H04N19/91 , H04N19/93
摘要： A method and an apparatus to encode a series of quantized coefficients of a transform of a block of image data. The transform is such that 0 is the most likely coefficient amplitude and 1 is the next most likely coefficient amplitude. The method includes forming modes for each encountered non-zero amplitude and forming events for the modes in the mode-modified series formed by setting to zero all non-zero amplitudes other than the amplitude defining the mode. An event for modes for amplitudes greater than 1 is a run of none or more zero-valued coefficients followed a non-zero amplitude in the mode-modified series. In one embodiment, a first mode is defined for amplitude 1 wherein an event is a run of none or more zero-valued coefficients followed the amplitude 1 coefficient in the mode-modified series. In another embodiment, a first mode is defined for amplitude 1 wherein an event is a run in the mode-modified series of none or more zero-valued coefficients followed by a run of one of a predefined set of sequences, each sequence in the set being a sequence of l's and 0's starting with a coefficient of amplitude 1. In another embodiment, a first mode is defined for amplitude 1 wherein an event is a sequence of 0's and 1's of the length of the series of quantized coefficients. The method includes forming a codeword for each encountered mode and forming codewords for the formed events in the mode. Relatively short codewords are formed to represent events that are relatively more likely to occur.
摘要翻译：一种用于编码图像数据块的变换的一系列量化系数的方法和装置。变换使得0是最可能的系数幅度，1是下一个最可能的系数幅度。该方法包括为每个遇到的非零幅度形成模式，并且通过将除了定义该模式的幅度之外的所有非零幅度设置为零而形成的模式修正序列中的模式的形成事件。对于幅度大于1的模式的事件是在模式修改的系列中没有或者更多的零值系数跟随非零幅度的运行。在一个实施例中，为振幅1定义第一模式，其中事件是模式修正序列中的幅度1系数之后的零值或更多个零值系数的运行。在另一个实施例中，对于振幅1定义第一模式，其中事件是模式修改的一系列中没有或多个零值系数的运行，随后运行预定义的一组序列，集合中的每个序列是以幅度1的系数开始的l's和0的序列。在另一个实施例中，对于振幅1定义第一模式，其中事件是一系列量化系数的长度的0和1的序列。该方法包括为每个遇到的模式形成码字，并在该模式中形成所形成的事件的码字。形成相对短的码字来表示相对更可能发生的事件。

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