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    • 5. 发明授权
    • Two-dimensional variable length coding of runs of zero and non-zero transform coefficients for image compression
    • 用于图像压缩的零和非零变换系数的二维可变长度编码
    • US07471840B2
    • 2008-12-30
    • US10922508
    • 2004-08-18
    • John A. ToebesWen-hsiung ChenFang WuDov Rosenfeld
    • John A. ToebesWen-hsiung ChenFang WuDov Rosenfeld
    • G06K9/36
    • H04N19/48H04N19/13H04N19/14H04N19/159H04N19/17H04N19/18
    • A method, apparatus, and carrier medium to encode a series of quantized transform coefficients. The method includes identifying events that each includes a run of zero-valued coefficients preceding a run of one or more non-zero-valued coefficients, and for each such event, jointly encoding the run lengths of the preceding run of zero-valued coefficients and the following run of non-zero-valued coefficients with a codeword, such that for at least some events, relatively more likely-to-occur pairs of runlengths are encoded by a shorter codeword than relatively less likely-to-occur runlengths. The method further includes encoding each amplitude in the run of consecutive non-zero-valued coefficients, and encoding the signs of such coefficients. The method is applicable to encoding a region in the series where there is likely to be a cluster of non-zero-valued coefficients.
    • 一种用于对一系列量化变换系数进行编码的方法,装置和载体介质。 该方法包括识别每个事件包括在一个或多个非零值系数的运行之前的零值系数的运行,并且对于每个这样的事件,联合编码前面的零值系数的运行长度,以及 具有码字的以下运行的非零值系数,使得对于至少一些事件,相对更可能出现的游程长度对由较短的码字编码,而不是相对较少可能发生的游程长度。 该方法还包括对连续非零值系数的运行中的每个振幅进行编码,以及对这些系数的符号进行编码。 该方法适用于对可能存在非零值系数的簇的系列中的区域进行编码。
    • 10. 发明申请
    • Two-dimensional variable length coding of runs of zero and non-zero transform coefficients for image compression
    • 用于图像压缩的零和非零变换系数的二维可变长度编码
    • US20060039621A1
    • 2006-02-23
    • US10922508
    • 2004-08-18
    • John ToebesWen-hsiung ChenFang WuDov Rosenfeld
    • John ToebesWen-hsiung ChenFang WuDov Rosenfeld
    • G06K9/36
    • H04N19/48H04N19/13H04N19/14H04N19/159H04N19/17H04N19/18
    • A method, apparatus, and carrier medium to encode a series of quantized transform coefficients. The method includes identifying events that each includes a run of zero-valued coefficients preceding a run of one or more non-zero-valued coefficients, and for each such event, jointly encoding the run lengths of the preceding run of zero-valued coefficients and the following run of non-zero-valued coefficients with a codeword, such that for at least some events, relatively more likely-to-occur pairs of runlengths are encoded by a shorter codeword than relatively less likely-to-occur runlengths. The method further includes encoding each amplitude in the run of consecutive non-zero-valued coefficients, and encoding the signs of such coefficients. The method is applicable to encoding a region in the series where there is likely to be a cluster of non-zero-valued coefficients.
    • 一种用于对一系列量化变换系数进行编码的方法,装置和载体介质。 该方法包括识别每个事件包括在一个或多个非零值系数的运行之前的零值系数的运行,并且对于每个这样的事件,联合编码前面的零值系数的运行长度,以及 具有码字的以下运行的非零值系数,使得对于至少一些事件,相对更可能出现的游程长度对由较短的码字编码,而不是相对较少可能发生的游程长度。 该方法还包括对连续非零值系数的运行中的每个振幅进行编码,以及对这些系数的符号进行编码。 该方法适用于对可能存在非零值系数的簇的系列中的区域进行编码。