公开(公告)号：US06937551B2

公开(公告)日：2005-08-30

申请号：US10405626

申请日：2003-04-03

申请人： Harumitsu Miyashita ,  Shinichi Konishi ,  Atsushi Nakamura ,  Takeshi Nakajima ,  Junichi Minamino

发明人： Harumitsu Miyashita ,  Shinichi Konishi ,  Atsushi Nakamura ,  Takeshi Nakajima ,  Junichi Minamino

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B20/10

CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10166 ,  G11B20/10296 ,  G11B2020/1484

摘要： A PRML detector includes a waveform equalizer for equalizing a waveform of a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium, and a decoder for generating binary-coded data of the reproduction signal based on the waveform equalized by the waveform equalizer. The decoder outputs a temporary data string which is obtained before the binary-coded data is obtained. The waveform equalizer includes an equalizer that includes a delay element that delays propagation of the reproduction signal, a plurality of multipliers that multiply predetermined coefficients by the reproduction signal and the delayed signal from the delay element, and an adder that adds outputs from the plurality of multipliers. A target value judger determines a target value for equalizing based on the temporary data string output from the decoder and a coefficient adaptive controller calculates the predetermined coefficients and adaptively updates the calculated predetermined coefficients for each of a plurality of multipliers.

摘要翻译： PRML检测器包括用于均衡通过再现记录在记录介质上的标记和非标记而获得的再现信号的波形的波形均衡器，以及用于基于由波形均衡的波形来生成再现信号的二进制编码数据的解码器 均衡器 解码器输出在获得二进制编码数据之前获得的临时数据串。 波形均衡器包括均衡器，其包括延迟再现信号的传播的延迟元件，将来自延迟元件的再现信号和延迟信号乘以预定系数的多个乘法器和加法器，该加法器将来自多个 乘数。 目标值判断器基于从解码器输出的临时数据串确定用于均衡的目标值，并且系数自适应控制器计算预定系数，并且针对多个乘法器中的每一个自适应地更新所计算的预定系数。

公开(公告)号：US06678230B2

公开(公告)日：2004-01-13

申请号：US09984351

申请日：2001-10-29

申请人： Harumitsu Miyashita ,  Shinichi Konishi ,  Atsushi Nakamura ,  Takeshi Nakajima ,  Junichi Minamino

发明人： Harumitsu Miyashita ,  Shinichi Konishi ,  Atsushi Nakamura ,  Takeshi Nakajima ,  Junichi Minamino

IPC分类号： G11B7005

CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10166 ,  G11B20/10296 ,  G11B2020/1484

摘要： Even with an asymmetric reproduction waveform, or under the noisy environment, an accurate equalizing error is found and temporary judgment value for adaptively controlling the coefficient of FIR filter is accurately outputted. A waveform equalizer for equalizing a waveform of a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium is provided. The equalizer includes: a detector which detects asymmetry of the reproduction signal arising from physical profiles of the marks and non-marks and outputs a detection signal representing asymmetric amount; a discriminator which discriminates the marks and non-marks based on the reproduction signal to output a discriminated signal; and a selector which calculates a first and second coefficient multiplied by the reproduction signal of the marks and non-marks based on the detection signal, which are different. The selector selects one of the first and second coefficients based on the discriminating signal.

摘要翻译： 即使具有不对称再现波形，或者在嘈杂的环境下，发现精确的均衡误差，并且准确地输出用于自适应地控制FIR滤波器的系数的临时判断值。 提供了用于均衡通过再现记录在记录介质上的标记和非标记而获得的再现信号的波形的波形均衡器。 均衡器包括：检测器，其检测由标记和非标记的物理特征引起的再现信号的不对称性，并输出表示不对称量的检测信号; 鉴别器，其基于再现信号鉴别标记和非标记，以输出鉴别信号; 以及选择器，其基于检测信号计算与所述标记和非标记的再现信号相乘的第一和第二系数，所述检测信号不同。 选择器基于鉴别信号选择第一和第二系数之一。

公开(公告)号：US06934233B2

公开(公告)日：2005-08-23

申请号：US10626607

申请日：2003-07-25

申请人： Harumitsu Miyashita ,  Shinichi Konishi ,  Atsushi Nakamura ,  Takeshi Nakajima ,  Junichi Minamino

发明人： Harumitsu Miyashita ,  Shinichi Konishi ,  Atsushi Nakamura ,  Takeshi Nakajima ,  Junichi Minamino

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B20/10

CPC分类号： G11B20/10009 ,  G11B7/005 ,  G11B20/10046 ,  G11B20/10055 ,  G11B20/10166 ,  G11B20/10296 ,  G11B2020/1484

摘要： A waveform equalizer for equalizing a waveform of a reproduction signal. A delay element delays a propagation of the reproduction signal. A plurality of multipliers multiply predetermined coefficients by the reproduction signal and the delayed propagation reproduction signal. A detector detects an asymmetry of the reproduction signal arising from physical profiles of each of the marks and the non-marks, and outputs a detection signal representing an amount of asymmetry. A discriminator outputs a discrimination signal in response to a discrimination of the marks and the non-marks. A calculator calculates a first coefficient multiplied by the reproduction signal of the marks based on the outputted detection signal, and calculates a second coefficient multiplied by the reproduction signal of the non-marks. A selector selects either the first or second coefficient, based upon the outputted discriminating signal.

摘要翻译： 用于均衡再现信号的波形的波形均衡器。 延迟元件延迟再现信号的传播。 多个乘法器通过再现信号和延迟的传播再现信号乘以预定系数。 检测器检测由每个标记和非标记的物理轮廓产生的再现信号的不对称性，并且输出表示不对称量的检测信号。 鉴别器响应于对标记和非标记的区分而输出鉴别信号。 计算器基于输出的检测信号计算乘以标记的再现信号的第一系数，并计算与非标记的再现信号相乘的第二系数。 选择器根据输出的鉴别信号选择第一或第二系数。

公开(公告)号：USRE39306E1

公开(公告)日：2006-09-26

申请号：US10785863

申请日：2004-02-25

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： G11B7/00

CPC分类号： G11B7/00375 ,  G11B7/005 ,  G11B20/10527

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.

公开(公告)号：US07095696B2

公开(公告)日：2006-08-22

申请号：US10473307

申请日：2002-04-05

申请人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshiya Akagi ,  Shinichi Konishi

发明人： Takeshi Nakajima ,  Harumitsu Miyashita ,  Toshiya Akagi ,  Shinichi Konishi

IPC分类号： G11B5/09

CPC分类号： G11B7/126 ,  G11B7/00 ,  G11B7/00456 ,  G11B7/006 ,  G11B20/10009 ,  G11B20/1426

摘要： A recording/producing device for writing data on a recording medium, or reading data from the recording medium, wherein data matching a recording pattern so specified as to include a plurality of mutually different sets of mark lengths and space lengths is written on the recording medium, and the data is then read to generate data signals. An edge shift detector uses data signals to measure the edge shift amount of a mark formed on a recording medium for each set of a mark length and a space length. A record controller sets a recording parameter for each set of a mark length and a space length based on the measured edge shift amount.

摘要翻译： 一种用于在记录介质上写入数据或从记录介质读取数据的记录/产生装置，其中将与指定为包括多个相互不同的多个标记长度和间隔长度的记录图案匹配的数据被写入记录介质 ，然后读取数据以产生数据信号。 边缘移位检测器使用数据信号来测量形成在记录介质上的每个标记长度和间隔长度的标记的边缘移位量。 记录控制器基于所测量的边缘偏移量为每组标记长度和空间长度设置记录参数。

公开(公告)号：US06807134B2

公开(公告)日：2004-10-19

申请号：US09749079

申请日：2000-12-27

申请人： Takeshi Nakajima ,  Shinichi Konishi ,  Harumitsu Miyashita ,  Toshihiko Takahashi

发明人： Takeshi Nakajima ,  Shinichi Konishi ,  Harumitsu Miyashita ,  Toshihiko Takahashi

IPC分类号： G11B509

CPC分类号： G11B7/126 ,  G11B7/005 ,  G11B20/10 ,  G11B20/1403 ,  G11B20/24

摘要： An asymmetry detection apparatus includes: a clock signal generator for generating a clock signal based on a reproduced signal; an A/D converter for sampling the reproduced signal in synchronization with the clock signal; a determiner for determining whether a level of each of a plurality of sampled data obtained by the sampling operation is equal to or greater than a predetermined level; and a detector for detecting asymmetry in the reproduced signal by using predetermined ones of the sampled data based on an output from the determiner. A jitter detection apparatus includes: a clock signal generator for generating a clock signal based on a reproduced signal; an A/D converter for sampling the reproduced signal in synchronization with the clock signal; a determiner for determining whether a level of each of a plurality of sampled data obtained by the sampling operation is equal to or greater than a predetermined level; and a detector for detecting jitter in the reproduced signal by using predetermined ones of the plurality of sampled data based on an output from the determiner.

摘要翻译： 不对称检测装置包括：时钟信号发生器，用于基于再现信号产生时钟信号; A / D转换器，用于与时钟信号同步地对再现信号进行采样; 确定器，用于确定通过采样操作获得的多个采样数据中的每一个的电平是否等于或大于预定电平; 以及检测器，用于基于来自确定器的输出，通过使用预定的采样数据来检测再现信号中的不对称性。 抖动检测装置包括：时钟信号发生器，用于基于再现信号产生时钟信号; A / D转换器，用于与时钟信号同步地对再现信号进行采样; 确定器，用于确定通过采样操作获得的多个采样数据中的每一个的电平是否等于或大于预定电平; 以及检测器，用于基于来自所述确定器的输出，通过使用所述多个采样数据中的预定数量来检测再现信号中的抖动。

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.

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.

公开(公告)号：US07145848B2

公开(公告)日：2006-12-05

申请号：US10825310

申请日：2004-04-16

申请人： Shinichi Konishi ,  Takeshi Nakajima

发明人： Shinichi Konishi ,  Takeshi Nakajima

IPC分类号： G11B7/00

CPC分类号： G11B7/0956 ,  G11B7/0053 ,  G11B7/0941 ,  G11B7/0945 ,  G11B7/1369 ,  G11B7/13927 ,  G11B20/10046 ,  G11B20/10212 ,  G11B20/10481

摘要： A tilt control apparatus includes an orthogonal shift detector (9) which detects an orthogonal shift by comparing a pair of a plurality of tap coefficients (C1, . . . , C7) of a FIR filter and generates an orthogonal shift signal, and an actuator varies the inclination of the optical axis of the light beam to correct the orthogonal shift, and a tilt controller (10) controls the drive of the actuator in accordance with the orhogonal shift signal to minimize the orthogonal shift. In the information recording operation, the orthogonal shift obtained based on a recording track is previously stored in a temporary storage portion and the stored orthogonal shift is used to conduct the tilt control.

摘要翻译： 倾斜控制装置包括正交移位检测器（9），其通过比较FIR滤波器的一对多个抽头系数（C 1，...，C 7）来检测正交位移，并产生正交移位信号，并且 执行器改变光束的光轴的倾斜度以校正正交位移，并且倾斜控制器（10）根据正交移位信号来控制致动器的驱动以最小化正交位移。 在信息记录操作中，将基于记录磁道获得的正交位移预先存储在临时存储部分中，并且使用存储的正交位移进行倾斜控制。

公开(公告)号：US06724706B1

公开(公告)日：2004-04-20

申请号：US09513192

申请日：2000-02-25

申请人： Takeshi Nakajima ,  Shinichi Konishi

发明人： Takeshi Nakajima ,  Shinichi Konishi

IPC分类号： H04N576

CPC分类号： G11B20/10037 ,  G11B7/0037 ,  G11B7/005 ,  G11B7/00718 ,  G11B20/10009 ,  G11B20/10055 ,  G11B2007/0013

摘要： Hold registers receive a hold register enable signal. When reading one kind signal of header field data, the hold register enable signal is High and the registers store newly renewed values of filter coefficients, and when reading a different kind signal of recording field data, the hold register enable signal is Low and the hold registers hold the last stored header field contents of the registers. Then, when a header field of a next sector is detected, the contents held in the hold registers are taken and preset to the registers. Thus, even in a case where an intermittent reproduction signal having different kinds of formats is processed in playback, the continuous adaptive equalization can be realized over the different kinds of reproduction signals in quality.

摘要翻译： 保持寄存器接收保持寄存器使能信号。 当读取头字段数据的一种信号时，保持寄存器使能信号为高电平，寄存器存储新更新的滤波器系数值，并且当读取记录场数据的不同种类信号时，保持寄存器使能信号为低电平并保持 寄存器保存寄存器的最后存储头字段内容。 然后，当检测到下一个扇区的报头字段时，保持在保持寄存器中的内容被采用并预设到寄存器。 因此，即使在重放中处理具有不同格式的间歇再现信号的情况下，也可以通过质量上的不同种类的再现信号来实现连续的自适应均衡。