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    VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD
    1.
    发明公开
    VARIABLE LENGTH CODING METHOD AND VARIABLE LENGTH DECODING METHOD 审中-公开
    KODIERUNGSVERFAHREN VARIABLERLÄNGEUND DEKODIERUNGSVERFAHREN VARIABLERLÄNGE

    公开(公告)号：EP3099068A1

    公开(公告)日：2016-11-30

    申请号：EP16175248.0

    申请日：2002-11-22

    申请人： Godo Kaisha IP Bridge 1

    发明人： KADONO, Shinya ,  KONDO, Satoshi ,  HAGAI, Makoto ,  ABE, Kiyofumi

    IPC分类号： H04N7/52

    CPC分类号： G06T9/005 ,  G11B20/1426 ,  H03M5/145 ,  H03M7/40 ,  H03M7/46 ,  H04N19/13 ,  H04N19/134 ,  H04N19/136 ,  H04N19/162 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/61 ,  H04N19/69 ,  H04N19/89 ,  H04N19/93

    摘要： According to the present invention, an image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero coefficients and a level value Lev that indicates a value of a non-zero coefficient following the zero coefficients. The run-length encoding unit RLE1 includes an reordering unit Lreodr for reordering level values Lev; a variable length coder LVLC for coding reordered level values ROLev by using a code table that is selected according to the value of a quantization parameter QP; a reordering unit Rreodr for reordering run values Run from high frequency component of the quantized coefficients to low frequency component; and a variable length coder RVLC for coding reordered run values RORun by using a code table that is selected according to the number of already-processed run values. Accordingly, a variable length coding process for quantized coefficients is carried out at a higher coding efficiency, with redundant information included in the coefficients being effectively reduced.

    摘要翻译： 根据本发明，图像编码装置提供游程长度编码单元RLE1，该游程长度编码单元RLE1使通过使用指示数量的游程值Run的运动值Run将通过将图像信号的频率分量量化到可变长度编码处理而获得的量化系数 连续零系数和表示零系数之后的非零系数的值的电平值Lev。 游程长度编码单元RLE1包括用于重新排列水平值Lev的重排序单元Lreodr; 可变长度编码器LVLC，用于通过使用根据量化参数QP的值选择的码表来对重新排序的电平值ROLev进行编码; 用于重新排序运行值的重新排序单元Rreodr从量化系数的高频分量运行到低频分量; 以及可变长度编码器RVLC，用于通过使用根据已经处理的运行值的数量选择的代码表来对重新排序的运行值RORun进行编码。 因此，用于量化系数的可变长度编码处理以更高的编码效率执行，其中包括在系数中的冗余信息被有效地减少。

    Variable length coding method and variable length decoding method
    4.
    发明公开
    Variable length coding method and variable length decoding method 有权
    编码方法和可变长度的可变长度解码方法

    公开(公告)号：EP2268033A3

    公开(公告)日：2012-02-01

    申请号：EP10180698.2

    申请日：2002-11-22

    申请人： Panasonic Corporation

    发明人： Kadono, Shinya ,  Kondo, Satoshi ,  Hagai, Makoto ,  Abe, Kiyofumi

    IPC分类号： H04N7/30

    CPC分类号： G06T9/005 ,  G11B20/1426 ,  H03M5/145 ,  H03M7/40 ,  H03M7/46 ,  H04N19/13 ,  H04N19/134 ,  H04N19/136 ,  H04N19/162 ,  H04N19/176 ,  H04N19/18 ,  H04N19/60 ,  H04N19/61 ,  H04N19/69 ,  H04N19/89 ,  H04N19/93

    摘要： According to the present invention, an image coding apparatus provides a run-length encoding unit RLE1 that subjects quantized coefficients which are obtained by quantizing frequency components of an image signal to a variable length coding process by using a run value Run that indicates the number of successive zero coefficients and a level value Lev that indicates a value of a non-zero coefficient following the zero coefficients. The run-length encoding unit RLE1 includes an reordering unit Lreodr for reordering level values Lev; a variable length coder LVLC for coding reordered level values ROLev by using a code table that is selected according to the value of a quantization parameter QP; a reordering unit Rreodr for reordering run values Run from high frequency component of the quantized coefficients to low frequency component; and a variable length coder RVLC for coding reordered run values RORun by using a code table that is selected according to the number of already-processed run values. Accordingly, a variable length coding process for quantized coefficients is carried out at a higher coding efficiency, with redundant information included in the coefficients being effectively reduced.