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    • 41. 发明授权
    • Modulation method, modulation apparatus, demodulation method, demodulation apparatus, information recording medium, information transmission method, and information transmission apparatus
    • 调制方法,调制装置,解调方法,解调装置,信息记录介质,信息发送方法和信息发送装置
    • US06653952B2
    • 2003-11-25
    • US10160023
    • 2002-06-04
    • Atsushi HayamiToshio KuroiwaTsuyoshi Oki
    • Atsushi HayamiToshio KuroiwaTsuyoshi Oki
    • H03M700
    • H03M5/145G11B20/1426G11B2020/1282G11B2020/1284G11B2020/143G11B2020/1457H03M7/46
    • There is disclosed a modulation method in which a four bit unit of a plurality of continuous input data words is encoded into a six bit unit of a plurality of continuous output code words by referring to a plurality of coding tables including output code words corresponding to input data words, and coding table designation information in which a coding table for use in encoding the next input data word is designated. The plurality of coding tables includes at least a first coding table and a second coding table, and first and second signals respectively obtained by subjecting a first output code word of said first coding table corresponding to a predetermined input data word and a second output code word of said second coding table corresponding to said predetermined input data word to NRZI modulation are reverse to each other in polarity. Further, in particular, two redundant bits are inserted into the plurality of continuous output code words for each predetermined number of corresponding data words. Even with such redundant bits, a DSV control is performed in any section, k satisfies 9 in a (1, k) RLL rule, and a repetition frequency of a minimum run is limited.
    • 公开了一种调制方法,其中通过参考包括与输入对应的输出代码字的多个编码表,将多个连续输入数据字中的四位单位编码为多个连续输出代码字的六位单元 数据字和编码表指定信息,其中指定用于编码下一个输入数据字的编码表。 多个编码表至少包括第一编码表和第二编码表,以及分别通过对与预定输入数据字对应的所述第一编码表的第一输出代码字和第二输出代码字 对应于所述预定输入数据字到NRZI调制的所述第二编码表的极性相反。 此外,特别地,对于每个预定数量的相应数据字,两个冗余比特被插入到多个连续输出码字中。 即使使用这样的冗余比特,在任何部分都执行DSV控制,在(1,k)RLL规则中k满足9,并且限制最小运行的重复频率。
    • 45. 发明授权
    • Modulation device, modulation method and recording medium
    • 调制装置,调制方式和记录介质
    • US07212483B2
    • 2007-05-01
    • US10668283
    • 2003-09-24
    • Harukuni KobariToshio KuroiwaHirotoshi OhnoHiroyoshi YoshikawaNobuchika OchiJunzo Suzuki
    • Harukuni KobariToshio KuroiwaHirotoshi OhnoHiroyoshi YoshikawaNobuchika OchiJunzo Suzuki
    • G11G20/10H03M7/00
    • G11B20/1426G11B2020/1461G11B2020/1469H03M5/145
    • When a code word sequence is generated by converting input data words of p bits into code words of q bits and concatenating adjacent ones of the code words with a merge bit sequence of r bits in order to obtain the best DSV value, according to one aspect, the adjacent code words are concatenated with the merge bit sequence of r bits which is selected, free from the restriction of the minimum run-length of (d+1)T and the maximum run-length of (k+1)T based on the run-length limiting rule RLL(d, k) but permitting the minimum run-length of (d+1)T and the maximum run-length of (k+2)T. According to another aspect, a merge bit sequence to be inserted after a current code word is selected by prefetching the current code word, a next code word, and a further next code word, temporarily concatenating these code words with merge bit sequences of r bits respectively to prepare code word sequence candidates free from the predetermined run-length limiting rule, calculating the DSV values of the code word sequence candidates, selecting one of the code word sequence candidates having a DSV value whose absolute value is closest to zero, and selecting the merge bit sequence between the current code word and the next code word of the selected merge bit sequence candidate. According to a further aspect, the input data words are encoded by a p-q modulation scheme after introducing for a predetermined period, as an input data word, specific data comprising alternating current signals or direct current signals which would cause a modulation device that prefetches only the next code word to output a code word sequence which includes particular frequency components.
    • 当通过将p位的输入数据字转换成q位的码字并且用r位的合并位序列连接码字的相邻码来产生码字序列以获得最佳的DSV值时,根据一个方面 ,相邻代码字与被选择的r位的合并位序列连接,不受(d + 1)T的最小游程长度的限制和基于(k + 1)T的最大游程长度的限制) 在游程长度限制规则RLL(d,k)上,但允许(d + 1)T的最小游程长度和(k + 2)T的最大游程长度。 根据另一方面,通过预取当前码字,下一个码字和下一个码字来选择在当前码字之后插入的合并比特序列,将这些码字临时连接到r比特的合并比特序列 分别准备没有预定游程长度限制规则的码字序列候选,计算码字序列候选的DSV值,选择其绝对值最接近零的DSV值的码字序列候选中的一个,选择 当前码字与所选合并位序列候选的下一码字之间的合并位序列。 根据另一方面,输入数据字在引入预定周期之后由pq调制方案编码,作为输入数据字,包括交流电流信号或直流电信号的特定数据,该数据字将导致仅仅预取的调制装置 下一个码字输出包含特定频率分量的码字序列。
    • 46. 发明申请
    • Optical recording medium and defect management device and method therefor
    • 光记录介质及缺陷管理装置及其方法
    • US20060221804A1
    • 2006-10-05
    • US11390149
    • 2006-03-28
    • Toshio Kuroiwa
    • Toshio Kuroiwa
    • G11B7/24
    • G11B20/1883G11B2020/10796G11B2020/1893G11B2220/20
    • A defect management device comprises a temporary storage buffer unit temporarily storing therein a recording management table including area allocation information used for writing optical recording data in a user data area of an optical recording medium and defect information used for performing defect management processing; a defect detection unit that detects a defect; a defect information creation unit that creates defect information when the defect detection unit detects the detect; an allocation information creation unit that creates area allocation information; a recording management table writing unit that writes a recording management table from the temporary storage buffer unit into a management area; and a recording management table reading unit that reads a latest recording management table on the optical recording medium.
    • 缺陷管理装置包括临时存储缓冲器单元,其中临时存储包括用于在光学记录介质的用户数据区域中写入光学记录数据的区域分配信息和用于执行缺陷管理处理的缺陷信息的记录管理表; 缺陷检测单元,其检测缺陷; 缺陷信息创建单元,当所述缺陷检测单元检测到所述检测时,创建缺陷信息; 分配信息创建单元,其创建区域分配信息; 记录管理表写入单元,其将记录管理表从临时存储缓冲单元写入管理区; 以及记录管理表读取单元,其读取光记录介质上的最新记录管理表。