Method and apparatus for detecting and correcting errors and erasures in product ECC-coded data arrays for DVD and similar storage subsystems
    111.
    发明授权
    Method and apparatus for detecting and correcting errors and erasures in product ECC-coded data arrays for DVD and similar storage subsystems 有权
    用于检测和纠正DVD和类似存储子系统的ECC编码数据阵列中的错误和擦除的方法和装置

    公开(公告)号:US06553533B2

    公开(公告)日:2003-04-22

    申请号:US09245803

    申请日:1999-02-05

    Abstract: A method and apparatus for detecting and correcting errors and erasures in product-coded data arrays by iterative syndrome processing array data in row major order and column major order. A first dense map is formed for classifying each row containing location indicia of random errors, their correction patterns, and pointers to rows containing erasure errors. This map is used to effectuate row array random error corrections in place in memory. A second dense map is formed of location indicia and correction patterns for each pair adjacent position within a column containing erasure errors as indexed by a counterpart row pointer. The second map is used to effectuate column array erasure corrections and random error corrections in place in memory.

    Abstract translation: 一种检测和校正产品编码数据阵列中的错误和消除误差的方法和装置,通过迭代校正处理阵列数据以行主序和列主序列。 形成第一密集地图,用于将包含随机错误的位置标记,它们的校正模式和指向包含擦除错误的行的指针的每行分类。 该映射用于在存储器中实现行阵列随机误差校正。 第二密集地图由位置标记和校正图案形成,每个对相邻位置在包含由对应行指针索引的擦除错误的列内。 第二个映射用于在存储器中实现列阵列擦除校正和随机错误校正。

    Method of converting bits of optical disk, demodulating method and apparatus

    公开(公告)号:US06348883B2

    公开(公告)日:2002-02-19

    申请号:US09791280

    申请日:2001-02-21

    CPC classification number: H03M7/46 G11B20/1426 G11B2020/1461

    Abstract: A method and apparatus are described which demodulate channel bits modulated by an arbitrary one of two modulation schemes, by making use of a consolidated reference table with a small address space. The method of the invention comprises the steps of: generating first output bits for representing patterns that correspond to patterns represented by first channel bits other than those patterns being unable to exist under first RLL constraints, the first output bits having a lesser number of bits than the first channel bits; and generating second output bits for representing patterns that correspond to patterns represented by second channel bits other than those patterns being unable to exist under second RLL constraints, the patterns represented by the second output bits being located at discontinuous areas of the patterns represented by the first output bits, the second output bits having a lesser number of bits than the second channel bits. The first and second output bits are used for designating an address of a demodulating reference table.

    Alkaline dry cell
    114.
    发明授权
    Alkaline dry cell 失效
    碱性干细胞

    公开(公告)号:US5445908A

    公开(公告)日:1995-08-29

    申请号:US958717

    申请日:1992-10-09

    CPC classification number: H01M4/661 H01M4/82

    Abstract: The present invention provides an alkaline dry cell which has a negative electrode comprising zinc alloy powders free of mercury as a negative electrode active material and provided in the center portion of the cell, a positive electrode provided around the outer surface of the negative electrode with a separator provided therebetween and a current collector comprising copper or a copper alloy and inserted in the negative electrode and which is inhibited from generation of hydrogen gas and from leakage of liquid. This alkaline dry cell is characterized in that the surface of the current collector is plated with a metal of high hydrogen overvoltage such as tin, lead, copper, zinc or an alloy of two or more of these metals.

    Abstract translation: 本发明提供一种碱性干电池,其具有含有不含汞的锌合金粉末作为负极活性物质并设置在电池的中心部分的负极,设置在负极的外表面周围的正电极, 设置在它们之间的隔板和包含铜或铜合金的集电体,并且插入在负电极中,并且抑制氢气的产生和液体的泄漏。 该碱性干电池的特征在于,集电体的表面镀有高的氢过电压金属,例如锡,铅,铜,锌或两种或更多种这些金属的合金。

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