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    • 69. 发明授权
    • Coding method and apparatus using quaternary codes
    • 使用四进制码的编码方法和装置
    • US5331320A
    • 1994-07-19
    • US976824
    • 1992-11-16
    • Roy D. CideciyanEvangelos S. Eleftheriou
    • Roy D. CideciyanEvangelos S. Eleftheriou
    • G11B20/14H03M5/20H04L25/49H03M7/06
    • G11B20/1496H03M5/20H04L25/4917
    • In digital data transmission and storage, binary data strings are encoded into symbols from a quaternary alphabet by a specific inventive use of finite-state machines. The novel, high-rate quaternary codes offer spectral shaping properties together with a significant increase in noise margin when used on channels which lend themselves to partial-response shaping. In principle, the encoding occurs in three steps: a u-state transition diagram generates quaternary symbols whose running digital sum assumes values from a given set; the u-state transition diagram is converted into a v-state machine, each of the v states being associated with a number of transitions sufficient to encode the input data bytes into output code words; finally, the v-state machine is switched into a next state depending on its current state and the last encoded input data byte.
    • 在数字数据传输和存储中,二进制数据串通过有限状态机的具体创造性使用从四进制字母表编码为符号。 新颖的高速四进制代码提供频谱整形特性,同时在用于部分响应成形的通道上使用时,噪声容限显着增加。 原则上,编码发生在三个步骤中:u状态转换图生成运行数字和假定来自给定集合的值的四进制符号; u状态转换图被转换为v状态机,v状态中的每一个与足以将输入数据字节编码为输出代码字的多个转换相关联; 最后,v状态机根据其当前状态和最后编码的输入数据字节切换到下一状态。
    • 70. 发明授权
    • Data encoding in solid state storage devices
    • 固态存储设备中的数据编码
    • US08930798B2
    • 2015-01-06
    • US13582768
    • 2011-03-23
    • Roy D. CideciyanEvangelos S. EleftheriouThomas Mittelholzer
    • Roy D. CideciyanEvangelos S. EleftheriouThomas Mittelholzer
    • H03M13/00H03M13/29H03M13/15G06F11/10
    • H03M13/2906G06F11/1072H03M13/152H03M13/2942
    • Methods and apparatus are provided for encoding input data for recording in s-level storage of a solid state storage device, where s f 2. Input data words are encoded in groups of M input data words in accordance with first and second BCH codes to produce, for each group, a set of M first codewords of the first BCH code. The set of M first codewords is produced such that at least one predetermined linear combination of the M first codewords produces a second codeword of the second BCH code, this second BCH code being a sub-code of the first BCH code. The sets of M first codewords are then recorded in the s-level storage. If each of the first and second codewords comprises N q-ary symbols where q=pk, k is a positive integer and p is a prime number, the q-ary code alphabet can be matched to the s-ary storage by ensuring that q and s are uth and vth powers respectively of a common base r, where u and v are positive integers and k f u, whereby p(k/u)v=s.
    • 提供了用于编码用于在固态存储设备的s级存储中记录的输入数据的方法和装置,其中sf 2.根据第一和第二BCH码,输入数据字以M个输入数据字的组进行编码, 对于每个组,第一BCH码的一组M个第一码字。 产生M个第一码字集合,使得M个第一码字的至少一个预定线性组合产生第二BCH码的第二码字,该第二BCH码是第一BCH码的子码。 然后将M组第一码字集合记录在s级存储器中。 如果第一和第二码字中的每一个包括N q个符号,其中q = pk,k是正整数,p是质数,则可以通过确保q- 和s分别是公共基础r的uth和vth权力,其中u和v是正整数和kfu,由此p(k / u)v = s。