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98 条记录 (耗时 0.025 秒)

    Decoding method, decoding device, program, recording/reproduction device and method, and reproduction device and method
    93.
    发明申请
    Decoding method, decoding device, program, recording/reproduction device and method, and reproduction device and method 失效
    解码方法，解码装置，程序，记录/再现装置和方法以及再现装置和方法

    公开(公告)号：US20060015791A1

    公开(公告)日：2006-01-19

    申请号：US10523452

    申请日：2004-05-28

    申请人： Atsushi Kikuchi ,  Masayuki Hattori ,  Toshiyuki Miyauchi ,  Kazuo Watanabe ,  Makiko Kan

    发明人： Atsushi Kikuchi ,  Masayuki Hattori ,  Toshiyuki Miyauchi ,  Kazuo Watanabe ,  Makiko Kan

    IPC分类号： H03M13/00

    CPC分类号： H03M13/2906 ,  G11B20/18 ,  G11B20/1866 ,  G11B2020/1836 ,  H03M13/1111 ,  H03M13/1191 ,  H03M13/15 ,  H03M13/1515 ,  H03M13/152 ,  H03M13/2936

    摘要： The present invention relates to a decoding method and a decoder, a program, a recording-and-reproducing apparatus and a method, and a reproducing apparatus and a method that are suitable for decoding encoded data encoded by using a linear code on ring R. A low-density processing unit performs parity-check-matrix low-density processing, performs linear combination for rows of a parity check matrix included in an obtained reception word, and generates a parity check matrix according to the linear-combination result, thereby reducing the density of the parity check matrix used for decoding, at step S21. Then, at step S22, an LDPC decoding unit performs decoding by using a sum product algorithm (SPA) by using the parity check matrix whose density is reduced through the processing performed at step S21. Where the processing at step S22 is finished, the LDPC decoding unit finishes decoding for the reception word. The present invention can be used for an error-correction system.

    摘要翻译： 本发明涉及适用于对通过使用环R上的线性码编码的编码数据进行解码的解码方法和解码器，程序，记录和再现装置和方法以及再现装置和方法。 低密度处理单元执行奇偶校验矩阵低密度处理，对获得的接收字中包含的奇偶校验矩阵的行进行线性组合，并根据线性组合结果生成奇偶校验矩阵，从而减少 在步骤S21中用于解码的奇偶校验矩阵的密度。然后，在步骤S22，LDPC解码单元通过使用通过使用密度减小的奇偶校验矩阵的和乘积算法（SPA）来执行解码 在步骤S2执行的处理。在步骤S22的处理完成的情况下，LDPC解码单元完成接收字的解码。 本发明可以用于纠错系统。

    Decoding method, decoding device, and program
    94.
    发明申请
    Decoding method, decoding device, and program 有权
    解码方式，解码装置和程序

    公开(公告)号：US20050278604A1

    公开(公告)日：2005-12-15

    申请号：US10521191

    申请日：2004-04-19

    申请人： Takashi Yokokawa ,  Makiko Kan ,  Yasuhiro Iida ,  Atsushi Kikuchi

    发明人： Takashi Yokokawa ,  Makiko Kan ,  Yasuhiro Iida ,  Atsushi Kikuchi

    IPC分类号： H03M13/19 ,  H03M13/11 ,  H03M13/00

    CPC分类号： H03M13/616 ,  H03M13/1134 ,  H03M13/116 ,  H03M13/1168 ,  H03M13/1185 ,  H03M13/1188 ,  H03M13/6566 ,  H03M13/6577

    摘要： The present invention relates to a decoding method and a decoding apparatus in which, while the circuit scale is suppressed, the operating frequency can be suppressed within a sufficiently feasible range, and control of memory access can be performed easily, and to a program therefor. By using a transformation check matrix obtained by performing one of or both a row permutation and a column permutation on an original check matrix of LDPC (Low Density Parity Check) codes, the LDPC codes are decoded. In this case, by using, as a formation matrix, a P×P unit matrix, a quasi-unit matrix in which one or more is, which are elements of the unit matrix, are substituted with 0, a shift matrix in which the unit matrix or the quasi-unit matrix is cyclically shifted, a sum matrix, which is the sum of two or more of the unit matrix, the quasi-unit matrix, and the shift matrix, and a P×P 0-matrix, the transformation check matrix is represented by a combination of a plurality of the formation matrices. A check node calculator 302 simultaneously performs p check node calculations. A variable node calculator 304 simultaneously performs p variable node calculations.

    摘要翻译： 解码方法和解码装置技术领域本发明涉及一种解码方法和解码装置，其中在抑制电路规模的同时，可以在足够可行的范围内抑制工作频率，并且可以容易地执行存储器存取的控制，并提供给其程序。 通过使用通过对LDPC（低密度奇偶校验）码的原始校验矩阵执行行排列和列置换中的一个或两者而获得的变换校验矩阵，对LDPC码进行解码。 在这种情况下，通过使用PxP单位矩阵，其中一个或多个是单位矩阵的元素的准单位矩阵被替换为0，其中单位矩阵 或准单位矩阵循环移位，作为单位矩阵，准单位矩阵和移位矩阵中的两个以上的和的和矩阵，以及PxP 0矩阵，变换检查矩阵为 由多个形成矩阵的组合表示。 校验节点计算器302同时执行p校验节点计算。 可变节点计算器304同时执行p个可变节点计算。

    Filter medium for molten metals
    98.
    发明授权
    Filter medium for molten metals 失效
    熔融金属过滤介质

    公开(公告)号：US5998322A

    公开(公告)日：1999-12-07

    申请号：US135528

    申请日：1998-08-18

    申请人： Kazutomo Hoshino ,  Toshiya Kunisaki ,  Hideaki Seto ,  Yukio Kai ,  Atsushi Kikuchi ,  Yukihisa Shiraishi ,  Kazunobu Kakimoto

    发明人： Kazutomo Hoshino ,  Toshiya Kunisaki ,  Hideaki Seto ,  Yukio Kai ,  Atsushi Kikuchi ,  Yukihisa Shiraishi ,  Kazunobu Kakimoto

    IPC分类号： B01D39/20 ,  B22D43/00 ,  C04B35/101 ,  C04B35/443

    CPC分类号： B22D43/004 ,  B01D39/2075 ,  C04B35/1015

    摘要： Herein disclosed is a filter medium for molten metals which consists of a sintered body of a mixture comprising 100 parts by weight of at least one refractory grain selected from the group consisting of alumina particles and Al.sub.2 O.sub.3.MgO spinel crystal particles; and 5 to 25 parts by weight of an inorganic binder which comprises 60 to 90% by weight of Al.sub.2 O.sub.3.MgO spinel crystal powder, 5 to 12% by weight of B.sub.2 O.sub.3, and not more than 30% by weight of at least one oxide selected from the group consisting of Al.sub.2 O.sub.3, MgO and TiO.sub.2. The filter medium is used for filtering off solid impurities mixed in molten metals, in particular, molten aluminums.

    摘要翻译： 本文公开了一种用于熔融金属的过滤介质，其由包含100重量份的至少一种选自氧化铝颗粒和Al 2 O 3 .MOO尖晶石晶体颗粒的耐火材料的混合物的烧结体组成。 和5至25重量份的无机粘合剂，其包含60至90重量％的Al 2 O 3 .MgO尖晶石结晶粉末，5至12重量％的B 2 O 3和不超过30重量％的至少一种选择的氧化物 由Al2O3，MgO和TiO2组成的组。 过滤介质用于过滤在熔融金属，特别是熔融铝中混合的固体杂质。