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    • 42. 发明专利
    • Reproducing device
    • 再现设备
    • JP2008300020A
    • 2008-12-11
    • JP2007148206
    • 2007-06-04
    • Toshiba Corp株式会社東芝
    • HORISAKI KOJIYAMAYA AKIRA
    • G11C29/42G11C16/06H03M13/45H04N19/89
    • H03M13/13G06F11/1068H03M13/3723H03M13/373H03M13/3746H03M13/6337
    • PROBLEM TO BE SOLVED: To secure resistance to defective cells rapidly increased in a storage medium reproducing device employing an error correction code. SOLUTION: For example, a determination part 11 outputs reproducing data 22 containing an code error among data read from a storage medium 20 to an error correction code decoding part 12, and additional information 23 indicating the sureness of the reproduced data 22 to a vanishment code setting part 13. The error correction code decoding part 12 detects/corrects a code error in the reproduced data 22 to output it as a reproducing result 24 to the outside. The error correction code decoding part 12 receives vanishment information 27 corresponding to the additional information 23 from a vanishment code setting part 13 to perform vanishment correction and code error correction for the reproduced data 22 according to the vanishment information 27 at the opportunity of decoding thereafter. COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:在采用纠错码的存储介质再现装置中,为了确保对缺陷单元的抵抗力迅速增加。 解决方案:例如,确定部分11将包含从存储介质20读取的数据中的代码错误的再现数据22输出到纠错码解码部分12,以及指示再现数据22的确定性的附加信息23 消失码设置部分13.纠错码解码部分12检测/校正再现数据22中的码错误,以将其作为再现结果24输出到外部。 错误校正码解码部分12从消除码设置部分13接收与附加信息23相对应的消失信息27,以便在之后解码的机会根据消失信息27对再现数据22进行消除校正和码错误校正。 版权所有(C)2009,JPO&INPIT
    • 44. 发明专利
    • Soft decision viterbi decoding device and method therefor, and decoding device and method
    • 软决策维权解码设备及其方法,以及解码设备和方法
    • JP2008054045A
    • 2008-03-06
    • JP2006228098
    • 2006-08-24
    • Nec Electronics CorpNecエレクトロニクス株式会社
    • SATO TAKAHIRO
    • H03M13/41
    • H03M13/4107H03M13/353H03M13/3723H03M13/41H03M13/6337H04L25/067
    • PROBLEM TO BE SOLVED: To surely reduce the power consumption, while maintaining an error correction capability when decoding convolutional codes.
      SOLUTION: In a Viterbi decoder 100 which decodes a reception signal, which is a convolutional code and has a plurality of sequences, by a soft decision Viterbi decoding method, an evaluation control part 30 evaluates the quality of the reception signal and outputs a control signal M, corresponding to the quality to a data acquisition part 20 for branch metric calculation. The data acquisition part 20 for branch metric calculation takes an AND operation between digital multi-value data S1, representing the amplitude of the reception signal and the control signal M to leave the digital multi-value data S1 as is, when the quality of the reception signal lower than a prescribed level and to thin the digital multi-value data S1 per sequence, when the quality of the reception signal equal to or higher than the prescribed level, and outputs a branch metric as data S2 for calculation, to a decoding execution part 90.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了确保降低功耗,同时在解码卷积码时保持纠错能力。 解决方案:在通过软判决维特比解码方法解码作为卷积码并具有多个序列的接收信号的维特比解码器100中,评估控制部分30评估接收信号的质量并输出 控制信号M,对应于用于分支度量计算的数据获取部分20的质量。 用于分支度量计算的数据获取部分20在代表接收信号的幅度的数字多值数据S1和控制信号M之间进行“与”运算,以便当数字多值数据S1的质量 接收信号低于规定电平,并且当接收信号的质量等于或高于规定电平时,将每个序列的数字多值数据S1变薄,并将作为用于计算的数据S2的分支度量输出到解码 执行部分90.版权所有(C)2008年,JPO&INPIT