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11. 发明授权

US07120102B2 Jitter detection apparatus and jitter detection method 失效
标题翻译：抖动检测装置和抖动检测方法
公开(公告)号：US07120102B2
公开(公告)日：2006-10-10
申请号：US10675384
申请日：2003-09-30
申请人： Naohiro Kimura , Harumitsu Miyashita , Takeshi Nakajima , Tetsuya Shihara
发明人： Naohiro Kimura , Harumitsu Miyashita , Takeshi Nakajima , Tetsuya Shihara
IPC分类号： G11B7/00
CPC分类号： G11B20/10009 , G11B7/0037 , G11B7/005
摘要： A jitter detection apparatus includes an A/D conversion section for converting an input analog signal into a plurality of discrete multiple value digital signals; a binarization section for performing binarization of the plurality of multiple value digital signals to generate a binary signal; a jitter calculation section for calculating a jitter amount based on an error between a value of a prescribed multiple value digital signal sampled at a time which is substantially the same as a time when the value of the binary signal is changed and a prescribed threshold value; a pattern detection section for detecting patterns of the binary signal before and after the time when the prescribed multiple value digital signal is sampled; and a correction section for correcting the jitter amount based on the detected pattern.
摘要翻译：抖动检测装置包括用于将输入的模拟信号转换为多个离散多值数字信号的A / D转换部分; 二进制化部分，用于执行所述多个多值数字信号的二值化以产生二进制信号; 抖动计算部分，用于基于与二进制信号的值改变时的时间基本相同的规定的多值数字信号的值与规定的阈值之间的误差来计算抖动量; 模式检测部分，用于检测在规定的多值数字信号被采样的时间之前和之后的二进制信号的模式; 以及校正部分，用于基于检测到的图案校正抖动量。

12. 发明授权

US06434098B1 Optical disc device 有权
公开(公告)号：US06434098B1
公开(公告)日：2002-08-13
申请号：US09840874
申请日：2001-04-25
申请人： Shinichi Konishi , Takeshi Nakajima , Harumitsu Miyashita , Toshihiko Takahashi , Toshiya Akagi , Yuji Hisakado , Yukihiro Yamasaki
发明人： Shinichi Konishi , Takeshi Nakajima , Harumitsu Miyashita , Toshihiko Takahashi , Toshiya Akagi , Yuji Hisakado , Yukihiro Yamasaki
IPC分类号： G11B700
摘要： An optical disc drive usable with discs to which data is continuously recorded and discs having a sector format can quickly resume playback signal output after passing imperfection causing potential reading errors, and plays disc with few read errors. A detection signal generator detects DC level fluctuation in the playback signal read from the disc and generates a detection signal tracking the DC level fluctuation. A selector selects a detection signal or a null signal without valid polarity based on the detection signal generated by the detection signal generator and input to the selector. A clamping unit performs a clamping process to suppress DC level fluctuation in the playback signal based on the detection signal when the selection unit selects the detection signal, and does not perform the clamping process when the selection unit selects the null signal. A signal processor performs specific signal processes based on clamping unit output.

13. 发明授权

US07623586B2 Frequency and phase control apparatus and maximum likelihood decoder 有权
标题翻译：频率和相位控制装置和最大似然解码器
公开(公告)号：US07623586B2
公开(公告)日：2009-11-24
申请号：US10532468
申请日：2003-10-20
申请人： Harumitsu Miyashita , Takeshi Nakajima , Naohiro Kimura
发明人： Harumitsu Miyashita , Takeshi Nakajima , Naohiro Kimura
IPC分类号： H04L23/02 , H04L5/12
CPC分类号： G11B27/3027 , G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10222 , G11B20/10425 , G11B2020/1288 , G11B2220/2541 , G11B2220/2562 , H03L7/091 , H03L7/107 , H04L7/033 , H04L7/041
摘要： A frequency and phase control apparatus includes an analog/digital conversion section for converting a reproduction signal into a multiple bit digital signal based on a clock signal; a maximum likelihood decoding section for converting the multiple bit digital signal into a binary signal; a pattern detection section for detecting a pattern of the binary signal; and a determination section for determining whether or not the multiple bit digital signal and the clock signal are in synchronization with each other based on the detection result. When the determination result of the determination section indicates that the multiple bit digital signal and the clock signal are in synchronization with each other, the maximum likelihood decoding section generates a binary signal based on a first state transition rule; otherwise, the maximum likelihood decoding section generates a binary signal based on a second state transition rule.
摘要翻译：频率相位控制装置包括：模拟/数字转换部分，用于基于时钟信号将再现信号转换成多位数字信号; 最大似然解码部分，用于将多位数字信号转换成二进制信号; 模式检测部分，用于检测二进制信号的模式; 以及确定部分，用于基于检测结果确定多位数字信号和时钟信号是否彼此同步。当确定部分的确定结果指示多位数字信号和时钟信号彼此同步时，最大似然解码部分基于第一状态转换规则产生二进制信号; 否则，最大似然解码部分基于第二状态转换规则生成二进制信号。

14. 发明申请

US20050128911A1 Recording/reproduction apparatus, recording/reproduction method, program, and recording power adjustment apparatus 有权
标题翻译：记录/再现装置，记录/再现方法，程序和记录功率调节装置
公开(公告)号：US20050128911A1
公开(公告)日：2005-06-16
申请号：US10981869
申请日：2004-11-05
申请人： Harumitsu Miyashita , Takeshi Nakajima , Mamoru Shoji , Yasumori Hino
发明人： Harumitsu Miyashita , Takeshi Nakajima , Mamoru Shoji , Yasumori Hino
IPC分类号： G11B7/004 , G11B7/0045 , G11B7/005 , G11B7/007 , G11B7/125 , G11B11/00 , G11B5/09
CPC分类号： G11B7/1267 , G11B7/0053 , G11B7/0062 , G11B7/00736
摘要： A recording/reproduction apparatus, comprising a first recording section for recording test information onto a medium using at least one recording power, a reproduction section for reproducing at least one test signal indicating the test information from the medium, and a second recording section for recording information onto the medium using one of the at least one recording power. The reproduction section comprises a decoding section for performing maximum likelihood decoding of the at least one test signal and generating at least one binary signal indicating a result of the maximum likelihood decoding, a calculation section for calculating a reliability of the result of the maximum likelihood decoding based on the at least one test signal and the at least one binary signal, and an adjustment section for adjusting a recording power for recording the information onto the medium to the one recording power based on the reliability.
摘要翻译：一种记录/再现装置，包括用于使用至少一个记录功率将测试信息记录在介质上的第一记录部分，用于从介质再现指示测试信息的至少一个测试信号的再现部分和用于记录的第二记录部分使用所述至少一个记录功率之一将信息传送到介质上。再现部分包括：解码部分，用于对所述至少一个测试信号执行最大似然解码，并产生指示最大似然解码结果的至少一个二进制信号;计算部分，用于计算最大似然解码结果的可靠性基于所述至少一个测试信号和所述至少一个二进制信号，以及调整部分，用于基于所述可靠性调整用于将所述信息记录到所述介质上的记录功率与所述一个记录功率。

15. 发明申请

US20050111318A1 Optical disc apparatus, clock signal generation method, program, and control apparatus 审中-公开
标题翻译：光盘装置，时钟信号生成方法，程序和控制装置
公开(公告)号：US20050111318A1
公开(公告)日：2005-05-26
申请号：US10973780
申请日：2004-10-26
申请人： Takeshi Nakajima , Harumitsu Miyashita , Naohiro Kimura
发明人： Takeshi Nakajima , Harumitsu Miyashita , Naohiro Kimura
IPC分类号： G11B5/09 , G11B7/00 , G11B7/09 , G11B20/10 , G11B20/14 , G11B27/24 , H03L7/08 , H03L7/085 , H03L7/091
CPC分类号： G11B27/24 , G11B20/1403 , G11B2220/216 , G11B2220/218 , G11B2220/2562 , G11B2220/2575 , H03L7/085 , H03L7/091
摘要： An optical disc apparatus is provided, which comprises a signal detection section for detecting a wobble signal from a reproduced signal of an optical disc, and a generation section for generating a clock signal in synchronization with the wobble signal. The generation section comprises a first difference signal generation section for generating a first difference signal indicating a difference between a frequency of the wobble signal and a frequency of the clock signal, a period detection section for detecting a modulation period of the wobble signal based on the first difference signal, and an adjustment section for adjusting the frequency of the clock signal based on a predetermined signal other than the first difference signal during a modulation period, and adjusting the frequency of the clock signal based on the first difference signal during a period other than the modulation period.
摘要翻译：提供了一种光盘装置，其包括用于从光盘的再现信号检测摆动信号的信号检测部分和用于与摆动信号同步地产生时钟信号的生成部分。所述生成部分包括：第一差分信号生成部分，用于产生指示摆动信号的频率与时钟信号的频率之间的差异的第一差分信号;周期检测部分，用于基于所述摆动信号的调制周期检测所述摆动信号; 第一差分信号和调整部分，用于在调制周期期间基于除第一差分信号之外的预定信号调整时钟信号的频率，并且在其它时间段期间基于第一差分信号调整时钟信号的频率比调制周期。

16. 发明授权

US06618337B2 Information recording and reproduction apparatus 有权
公开(公告)号：US06618337B2
公开(公告)日：2003-09-09
申请号：US09770778
申请日：2001-01-26
申请人： Harumitsu Miyashita , Shinichi Konishi , Takeshi Nakajima , Toshihiko Takahashi
发明人： Harumitsu Miyashita , Shinichi Konishi , Takeshi Nakajima , Toshihiko Takahashi
IPC分类号： G11B700
CPC分类号： G11B27/36 , G11B7/0045 , G11B7/005 , G11B27/24 , G11B27/3027 , G11B2220/216 , G11B2220/2525 , G11B2220/2575
摘要： An information recording and reproduction apparatus includes a recording section for recording data into a recording medium in accordance with address information recorded in the recording medium, a first reproduction section for reproducing at least one data including the data recorded in the recording medium in accordance with a first reproduction method to obtain at least one reproduced data, a second reproduction section for reproducing the address information in accordance with a second reproduction method to obtain reproduced address information, and a determination section for mapping the data to a specific reproduced data of the at least one reproduced data based on the address information and the reproduced address information, and comparing the data with the specific reproduced data to determine a recording condition of a region of the recording medium storing the data. The degree of influence of the recording condition of data recorded in the recording medium, on whether the data is correctly reproduced, is greater when the data is reproduced in accordance with the first reproduction method than with the second reproduction method.

17. 发明授权

US08270542B2 Method for evaluating quality of read signal and apparatus for reading information 有权
标题翻译：用于评估读取信号的质量的方法和用于读取信息的装置
公开(公告)号：US08270542B2
公开(公告)日：2012-09-18
申请号：US12510419
申请日：2009-07-28
申请人： Takeshi Nakajima , Harumitsu Miyashita , Hiromichi Ishibashi , Shigeru Furumiya
发明人： Takeshi Nakajima , Harumitsu Miyashita , Hiromichi Ishibashi , Shigeru Furumiya
IPC分类号： H04L27/06
CPC分类号： G11B20/1816
摘要： A most probable path is selected from a number n (where n≧2) of paths of state transitions occurring from a first state Sk−j (where k≧3 and j≧2) at a time k−j into a second state Sk at a time k. The method includes the steps of detecting predetermined combinations of the first and second states Sk−j and Sk defining the n probable paths in a predetermined period j between the times k−j and k, and evaluating the reliability of a read signal, decoded in the period j, by |Pa−Pb|. Pa and Pb indicate the probabilities of state transition of first and second state transition paths in the period j. The first and second state transition paths are estimated to be the most probable and the second most probable, respectively, among the n probable paths defined by the combinations detected.
摘要翻译：从时刻k-j的第一状态Sk-j（其中k≥3和j≥2）发生的状态转换路径的数n（其中n≥2）中选择最可能的路径到第二状态Sk 在一个时间k。该方法包括以下步骤：检测在时间k-j和k之间的预定周期j中定义n个可能路径的第一和第二状态Sk-j和Sk的预定组合，并且评估读取信号的可靠性，周期j，由| Pa-Pb |。 Pa和Pb表示周期j中第一和第二状态转换路径的状态转移的概率。估计第一和第二状态转换路径是由检测到的组合定义的n个可能路径中最可能和最可能的最可能的。

18. 发明授权

US07646686B2 Recording/reproduction apparatus which adjusts recording power based on a partial response maximum likelihood (PRML) technique 有权
标题翻译：基于部分响应最大似然（PRML）技术调节记录功率的记录/再现装置
公开(公告)号：US07646686B2
公开(公告)日：2010-01-12
申请号：US10981869
申请日：2004-11-05
申请人： Harumitsu Miyashita , Takeshi Nakajima , Mamoru Shoji , Yasumori Hino
发明人： Harumitsu Miyashita , Takeshi Nakajima , Mamoru Shoji , Yasumori Hino
IPC分类号： G11B7/00
CPC分类号： G11B7/1267 , G11B7/0053 , G11B7/0062 , G11B7/00736
摘要： A recording/reproduction apparatus, comprising a first recording section for recording test information onto a medium using at least one recording power, a reproduction section for reproducing at least one test signal indicating the test information from the medium, and a second recording section for recording information onto the medium using one of the at least one recording power. The reproduction section comprises a decoding section for performing maximum likelihood decoding of the at least one test signal and generating at least one binary signal indicating a result of the maximum likelihood decoding, a calculation section for calculating a reliability of the result of the maximum likelihood decoding based on the at least one test signal and the at least one binary signal, and an adjustment section for adjusting a recording power for recording the information onto the medium to the one recording power based on the reliability.
摘要翻译：一种记录/再现装置，包括用于使用至少一个记录功率将测试信息记录在介质上的第一记录部分，用于从介质再现指示测试信息的至少一个测试信号的再现部分和用于记录的第二记录部分使用所述至少一个记录功率之一将信息传送到介质上。再现部分包括：解码部分，用于对所述至少一个测试信号执行最大似然解码，并产生指示最大似然解码结果的至少一个二进制信号;计算部分，用于计算最大似然解码结果的可靠性基于所述至少一个测试信号和所述至少一个二进制信号，以及调整部分，用于基于所述可靠性调整用于将所述信息记录到所述介质上的记录功率与所述一个记录功率。

19. 发明授权

US07584315B2 Integrated circuit monitoring an internal signal converted from an analog input signal 有权
标题翻译：集成电路监控从模拟输入信号转换的内部信号
公开(公告)号：US07584315B2
公开(公告)日：2009-09-01
申请号：US10818568
申请日：2004-04-06
申请人： Naohiro Kimura , Harumitsu Miyashita , Takeshi Nakajima , Hiromichi Ishibashi , Yoshikazu Yamamoto , Kohei Nakata
发明人： Naohiro Kimura , Harumitsu Miyashita , Takeshi Nakajima , Hiromichi Ishibashi , Yoshikazu Yamamoto , Kohei Nakata
IPC分类号： G06F13/12 , G06F3/00 , G06F13/00 , G11B7/085
CPC分类号： G01R31/3177
摘要： An integrated circuit includes: a signal processor, which receives an input signal and generates a processed signal, representing processing information obtained by subjecting the input signal to predetermined processing, and at least one type of internal signal including internal information obtained during the processing; at least one memory storing the processing information; an interface exchanges signals with an external device; and a controller controlling the signal processor, memory and interface. On receiving a first instruction from the external device through the interface, the controller controls the signal processor and memory such that the processing information is once stored in the memory and then output to the external device via the interface. In response to a second instruction, the controller controls the signal processor and memory such that the internal information is once stored in the memory and then output to the external device via the interface.
摘要翻译：集成电路包括：信号处理器，其接收输入信号并产生经处理的信号，表示通过对输入信号进行预定处理而获得的处理信息;以及至少一种内部信号，包括在处理期间获得的内部信息; 存储所述处理信息的至少一个存储器; 接口与外部设备交换信号; 以及控制信号处理器，存储器和接口的控制器。在通过接口从外部设备接收到第一指令时，控制器控制信号处理器和存储器，使得处理信息曾经存储在存储器中，然后经由接口输出到外部设备。响应于第二指令，控制器控制信号处理器和存储器，使得内部信息被一次存储在存储器中，然后经由接口输出到外部设备。

20. 发明申请

US20090103412A1 RECORDING CONTROL APPARATUS, RECORDING AND REPRODUCTION APPARATUS, AND RECORDING CONTROL METHOD 有权
标题翻译：记录控制装置，记录和再现装置以及记录控制方法
公开(公告)号：US20090103412A1
公开(公告)日：2009-04-23
申请号：US12249978
申请日：2008-10-13
申请人： Harumitsu MIYASHITA , Takeshi Nakajima , Naohiro Kimura
发明人： Harumitsu MIYASHITA , Takeshi Nakajima , Naohiro Kimura
IPC分类号： G11B20/10
CPC分类号： G11B7/0062 , G11B7/00456 , G11B20/10009 , G11B20/10055 , G11B20/10111 , G11B20/10481 , G11B20/1403
摘要： A recording control apparatus includes a waveform rectification section for receiving a digital signal generated from an analog signal representing information reproduced from an information recording medium, and rectifying a waveform of the digital signal; a maximum likelihood decoding section for performing maximum likelihood decoding of the digital signal having the waveform thereof rectified, and generating a binary signal representing a result of the maximum likelihood decoding; a reliability calculation section for calculating a reliability of the result of the maximum likelihood decoding based on the digital signal having the waveform thereof rectified and the binary signal; and an adjusting section for adjusting a shape of a recording signal for recording the information on the information recording medium based on the calculated reliability.
摘要翻译：一种记录控制装置，包括：波形整流部分，用于接收从表示从信息记录介质再现的信息的模拟信号产生的数字信号，并整流数字信号的波形; 最大似然解码部分，用于对其波形进行整流的数字信号进行最大似然解码，并生成表示最大似然解码结果的二进制信号; 可靠性计算部分，用于基于其整流波形的数字信号和二进制信号来计算最大似然解码结果的可靠性; 以及调整部，用于基于所计算的可靠性来调整用于将信息记录在信息记录介质上的记录信号的形状。

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