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1. 发明授权

US07212483B2 Modulation device, modulation method and recording medium 有权
标题翻译：调制装置，调制方式和记录介质
公开(公告)号：US07212483B2
公开(公告)日：2007-05-01
申请号：US10668283
申请日：2003-09-24
申请人： Harukuni Kobari , Toshio Kuroiwa , Hirotoshi Ohno , Hiroyoshi Yoshikawa , Nobuchika Ochi , Junzo Suzuki
发明人： Harukuni Kobari , Toshio Kuroiwa , Hirotoshi Ohno , Hiroyoshi Yoshikawa , Nobuchika Ochi , Junzo Suzuki
IPC分类号： G11G20/10 , H03M7/00
CPC分类号： G11B20/1426 , G11B2020/1461 , G11B2020/1469 , H03M5/145
摘要： 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.
摘要翻译：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。

2. 发明授权

US4638374A Defect detecting apparatus for a rotary recording medium 失效
标题翻译：用于旋转记录介质的缺陷检测装置
公开(公告)号：US4638374A
公开(公告)日：1987-01-20
申请号：US620803
申请日：1984-06-14
申请人： Yuji Yoshitake , Kentaro Yokouchi , Hiroyoshi Yoshikawa
发明人： Yuji Yoshitake , Kentaro Yokouchi , Hiroyoshi Yoshikawa
IPC分类号： G01R31/00 , G01N27/24 , G07C3/14 , G11B7/0037 , G11B9/06 , G11B19/04 , G11B20/02 , G11B20/18 , G11B27/10 , G11B27/36 , G11B33/10 , H04N17/06 , H04N5/781 , H04N5/94
CPC分类号： G11B27/36 , G07C3/14 , G11B19/04 , G11B20/025 , G11B20/18 , G11B27/105 , G11B33/10 , G11B7/00375 , G11B9/06 , H04N17/06 , G11B2220/20
摘要： A defect detecting apparatus for a disc comprises a first dropout selecting circuit for producing a first dropout detection signal having a predetermined pulse width in accordance with the human eyesight, a second dropout selecting circuit for producing a second dropout detection signal which is obtained by detecting a dropout in a vicinity of a beginning of a reproduced vertical synchronizing signal, an angle detecting circuit for generating an angle detection signal indicative of angular positions on the disc where the first and second dropout detection signals are generated with respect to a reference position which is related to the reference signal, a clog detecting circuit for generating a clog detection signal, a compensating circuit for compensating a value of an address signal which is separated from a signal which is reproduced from the disc in a reproducing apparatus, a processing circuit for performing a first process of discriminating the existence of a tracking error, a second process of discriminating an existence of a clog, and a third process of discriminating the existence of an interval in which a dropout exists, and at least an output device for storing or displaying a processed result from the processing circuit.
摘要翻译：一种盘的缺陷检测装置包括：第一压差选择电路，用于根据人的视力产生具有预定脉冲宽度的第一压差检测信号;第二压差选择电路，用于产生第二压差检测信号，该第二压差选择电路通过检测在再现的垂直同步信号的开始附近的压差;角度检测电路，用于产生指示盘上的角位置的角度检测信号，其中相对于相关的参考位置产生第一和第二压差检测信号参考信号，用于产生堵塞检测信号的堵塞检测电路，用于补偿与在再现装置中从盘再现的信号分离的地址信号的值的补偿电路，区分跟踪误差的第一个过程，如识别堵塞的存在的判别处理以及鉴别存在差错的间隔的存在的第三处理和至少一个用于存储或显示来自处理电路的处理结果的输出装置。

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