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    • 71. 发明授权
    • Method of converting a series of data words into a modulated signal
    • 将一系列数据字转换为调制信号的方法
    • US06943708B2
    • 2005-09-13
    • US10893336
    • 2004-07-19
    • Sang Woon SuhJin Yong KimJae Jin LeeJoo Hyun Lee
    • Sang Woon SuhJin Yong KimJae Jin LeeJoo Hyun Lee
    • H03M7/14G11B20/14H03M5/14H03M7/00H03M7/46
    • H03M7/46G11B20/1426G11B2020/1457H03M5/145
    • A method and apparatus of converting a series of data words into modulated signals generates for each data words, a number of intermediate sequences by combining mutually different digital words with a data word, scrambles the intermediate sequences to form alternative sequences, translates each alternataive sequence into a (d,k) constrained sequences, measures for each (d,k) constrained sequences, not only an inclusion rate of an undesired sub-sequence but also a running DSV (Digital Sum Value), and selects one (d,k) constrained sequence having a small inclusion rate for recording on an optical or magneto-optical recording medium among the (d,k) constrained sequences having maximum value of running DSV, smaller than a preset limit. Accordingly, efficient DSV control can be achieved for even relatively-long sequences.
    • 将一系列数据字转换成调制信号的方法和装置通过将相互不同的数字字与数据字相结合,为每个数据字生成多个中间序列,对中间序列进行加扰以形成替代序列,将每个交替序列转换成 (d,k)约束序列,每个(d,k)约束序列的测量,不仅是不期望的子序列的包含率,而且是运行的DSV(数字和值),并且选择一个(d,k) 约束序列具有小的包含率用于在具有最大值的运行DSV的(d,k)约束序列中的光学或磁光记录介质上记录,小于预设极限。 因此,对于甚至相对较长的序列,可以实现有效的DSV控制。
    • 72. 发明授权
    • Method and apparatus of converting a series of data words into a modulated signal
    • 将一系列数据字转换为调制信号的方法和装置
    • US06829306B2
    • 2004-12-07
    • US09853758
    • 2001-05-14
    • Kees A. Schouhamer ImminkSeong Keun AhnSang Woon SeoJin Yong Kim
    • Kees A. Schouhamer ImminkSeong Keun AhnSang Woon SeoJin Yong Kim
    • H03M738
    • G11B20/10203G11B20/1426G11B20/18G11B20/1803H03M5/145H03M7/46
    • The present invention relates to method and apparatus of converting a series of data words into modulated signals. This method divides a data word, which a sync signal is to be added in front or rear of when it is written in a recording medium, into two or more word segments, generates for each word segment a number of intermediate sequences by combining mutually different digital words with that word segment, scrambles these intermediate sequences to form alternative sequences, translates each alternative sequence into a (d, k) constrained sequence, checks how many undesired sub-sequences are contained in each (d, k) constrained sequence, and selects one (d, k) constrained sequence for recording on an optical or magneto-optical recording medium among the (d, k) constrained sequences not having the undesired sub-sequence. Applying this method to a modulating device, DSV control can be conducted by much simpler hardware.
    • 本发明涉及将一系列数据字转换为调制信号的方法和装置。 该方法将在将其写入记录介质时的前后的同步信号相加的数据字分成两个或多个字段,通过组合相互不同的方式为每个字段生成多个中间序列 将这些中间序列加扰以形成备选序列,将每个备选序列转换为(d,k)约束序列,检查每个(d,k)约束序列中包含多少个不希望的子序列,以及 在不具有不期望的子序列的(d,k)约束序列中,在光学或磁光记录介质上选择一个(d,k)约束序列用于记录。 将该方法应用于调制装置,可以通过更简单的硬件来进行DSV控制。