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1.发明授权Normalization factor adaptation for LDPC decoding for hard disk drive systems 有权用于硬盘驱动器系统的LDPC解码的归一化因子适配公开(公告)号：US09548762B2
公开(公告)日：2017-01-17
申请号：US14508983
申请日：2014-10-07
Applicant: Agency for Science, Technology and Research
CPC classification number: H03M13/353 , G06F11/1076 , G11B20/1833 , G11B2020/185 , H03M13/1102 , H03M13/1111 , H03M13/1117 , H03M13/6343
Abstract: An adaptation technique for decoding low-density parity-check (LDPC) codes for hard disk drive (HDDs) systems is disclosed. The method includes tuning the normalization factor for LDPC decoding for each data zone and read head during the test stage of manufacturing. The LDPC decoder can be either a sum-product algorithm (SPA) decoder or a Min-Sum decoder. The channel detector can be any soft-output detector, such as a soft-output Viterbit detector (SOVA), a BCJR detector, a pattern-dependent noise-predictive (PDNP) detector, or a bi-directional pattern-dependent noise-predictive (BiPDNP) detector. The adaptation technique can optimize the LDPC decoding performance for each data zone and read head, thereby relaxing the acceptance criteria for hard disk drive read/write heads and disk media, enabling acceptance and use of a much broader range of head and media for hard disk drives.
Abstract translation: 公开了用于解码硬盘驱动器（HDD）系统的低密度奇偶校验（LDPC）码的适配技术。 该方法包括在制造的测试阶段调整每个数据区和读头的LDPC解码的归一化因子。 LDPC解码器可以是和积算法（SPA）解码器或Min-Sum解码器。 信道检测器可以是任何软输出检测器，例如软输出维特比特检测器（SOVA），BCJR检测器，模式相关噪声预测（PDNP）检测器或双向模式相关噪声预测 （BiPDNP）检测器。 适应技术可以优化每个数据区和读取头的LDPC解码性能，从而放松硬盘驱动器读/写磁头和磁盘介质的接受标准，从而可以接受和使用更广泛的磁头和媒体范围的硬盘 驱动器
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公开(公告)号：US08917540B2
公开(公告)日：2014-12-23
申请号：US13660337
申请日：2012-10-25
Applicant: Agency for Science, Technology and Research
Inventor： Kui Cai , Zhiliang Qin
CPC classification number: G11C11/161 , G11C7/1006 , G11C11/1653 , G11C11/1673
Abstract: According to embodiments of the present invention, a memory device with soft decision decoding is provided. The memory device includes a memory cell configured to store an input data bit; a memory sensor configured to read out a parameter associated with a state of the memory cell; a detector configured to determine, based on the parameter read out from the memory cell, a soft information indicating the likelihood that the input data bit stored in the memory cell is a “0” or the likelihood that the input data bit stored in the memory cell is a “1”; and a decoder configured to generate a decoded bit based on the soft information. Further embodiments relate to a method of performing soft-decision decoding on a data bit stored in a memory cell of a memory device.
Abstract translation: 根据本发明的实施例，提供了具有软判决解码的存储器件。 存储器件包括：存储器单元，被配置为存储输入数据位; 存储器传感器，被配置为读出与所述存储单元的状态相关联的参数; 检测器，被配置为基于从存储器单元读出的参数来确定指示存储在存储单元中的输入数据位为“0”的可能性的软信息或存储在存储器中的输入数据位的可能性 细胞是“1”; 以及解码器，被配置为基于所述软信息生成解码比特。 另外的实施例涉及对存储在存储器件的存储单元中的数据位进行软判决解码的方法。
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公开(公告)号：US09454428B2
公开(公告)日：2016-09-27
申请号：US14554577
申请日：2014-11-26
Applicant: Agency for Science, Technology and Research
Inventor： Kui Cai , Zhiliang Qin , Xueqiang Wang
CPC classification number: G06F11/1012 , G11C11/16 , G11C11/161 , H03M13/152 , H03M13/451 , H03M13/458
Abstract: There is provided an error correction method for a non-volatile memory. The method includes receiving a codeword read from the non-volatile memory, computing a reliability information for each bit of the codeword received, and performing a reduced-complexity soft-decision decoding (SDD) technique to decode the received codeword. In particular, the SDD technique includes forming a set of test patterns based on the reliability data, and determining whether to perform a HDD of a test pattern in the set of test patterns based on a distance between the test pattern and a candidate pattern. There is also provided an error correction module for a non-volatile memory and a memory system incorporating the error correction module.
Abstract translation: 提供了用于非易失性存储器的纠错方法。 该方法包括接收从非易失性存储器读取的码字，计算接收到的码字的每个比特的可靠性信息，并执行降低复杂度的软判决解码（SDD）技术来解码所接收的码字。 特别地，SDD技术包括基于可靠性数据形成一组测试图案，并且基于测试图案和候选图案之间的距离来确定是否在该组测试图案中执行测试图案的HDD。 还提供了用于非易失性存储器的错误校正模块和包含纠错模块的存储器系统。
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4.发明申请NORMALIZATION FACTOR ADAPTATION FOR LDPC DECODING FOR HARD DISK DRIVE SYSTEMS 有权用于硬盘驱动系统的LDPC解码的正规化因子适应公开(公告)号：US20150100855A1
公开(公告)日：2015-04-09
申请号：US14508983
申请日：2014-10-07
Applicant: Agency for Science, Technology and Research
CPC classification number: H03M13/353 , G06F11/1076 , G11B20/1833 , G11B2020/185 , H03M13/1102 , H03M13/1111 , H03M13/1117 , H03M13/6343
Abstract: An adaptation technique for decoding low-density parity-check (LDPC) codes for hard disk drive (HDDs) systems is disclosed. The method includes tuning the normalization factor for LDPC decoding for each data zone and read head during the test stage of manufacturing. The LDPC decoder can be either a sum-product algorithm (SPA) decoder or a Min-Sum decoder. The channel detector can be any soft-output detector, such as a soft-output Viterbit detector (SOVA), a BCJR detector, a pattern-dependent noise-predictive (PDNP) detector, or a bi-directional pattern-dependent noise-predictive (BiPDNP) detector. The adaptation technique can optimize the LDPC decoding performance for each data zone and read head, thereby relaxing the acceptance criteria for hard disk drive read/write heads and disk media, enabling acceptance and use of a much broader range of head and media for hard disk drives.
Abstract translation: 公开了用于解码硬盘驱动器（HDD）系统的低密度奇偶校验（LDPC）码的适配技术。 该方法包括在制造的测试阶段调整每个数据区和读头的LDPC解码的归一化因子。 LDPC解码器可以是和积算法（SPA）解码器或Min-Sum解码器。 信道检测器可以是任何软输出检测器，例如软输出维特比特检测器（SOVA），BCJR检测器，模式相关噪声预测（PDNP）检测器或双向模式相关噪声预测 （BiPDNP）检测器。 适应技术可以优化每个数据区和读取头的LDPC解码性能，从而放松硬盘驱动器读/写磁头和磁盘介质的接受标准，从而可以接受和使用更广泛的磁头和媒体范围的硬盘 驱动器
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