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1. 发明授权

US06807134B2 Asymmetry detection apparatus, jitter detection apparatus, and recording/reproduction apparatus 有权
标题翻译：不对称检测装置，抖动检测装置和记录/再现装置
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。

2. 再颁专利

USRE39306E1 Optical disc device 有权
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.

3. 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.

4. 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.

5. 发明授权

US07095696B2 Recording/reproducing device 有权
标题翻译：记录/再现装置
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。

6. 发明授权

US06937551B2 PRML detector having a viterbi decoder outputting temporary judgement results 有权
标题翻译： PRML检测器具有输出临时判断结果的维特比解码器
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。

7. 发明授权

US06678230B2 Waveform equalizer for a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium 有权
标题翻译：用于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均衡器
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。

8. 发明授权

US06934233B2 Waveform equalizer for a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium 有权
标题翻译：用于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均衡器
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。

9. 发明申请

US20060109770A1 Optical disc recording/playback apparatus 失效
标题翻译：光盘记录/播放装置
公开(公告)号：US20060109770A1
公开(公告)日：2006-05-25
申请号：US11269586
申请日：2005-11-09
申请人： Youichi Ogura , Toshihiko Takahashi , Hiroaki Hayashi , Teruhiko Izumi , Dai Ichiryu , Shinichi Konishi
发明人： Youichi Ogura , Toshihiko Takahashi , Hiroaki Hayashi , Teruhiko Izumi , Dai Ichiryu , Shinichi Konishi
IPC分类号： G11B7/00
CPC分类号： G11B7/0053 , G11B7/00375 , G11B7/1263 , G11B7/24082 , G11B20/10009 , G11B20/1403 , G11B27/24 , G11B2220/2575
摘要： An optical disc recording/playback apparatus is provided with a first AD converter 35 for shaping a push-pull signal 14 detected from an optical disc medium 1 by a light difference signal shaping circuit 21, and converting the signal into a digital sampling signal 38 using a sampling clock 37 synchronized with a channel frequency; a series of means for detecting wobble amplitude information 77 during recording from the digital sampling signal 38; a series of means for detecting address polarity information 60 and address position information during playback; and a recording laser power control circuit 113 for controlling a recording laser power to a power suited for recording on the basis of the wobble amplitude information.
摘要翻译：光盘记录/重放装置设置有第一AD转换器35，用于通过光差信号整形电路21对从光盘介质1检测到的推挽信号14进行整形，并且将信号转换成数字采样信号38，使用与信道频率同步的采样时钟37; 用于在从数字采样信号38记录期间检测摆动幅度信息77的一系列装置; 用于检测地址极性信息60和播放期间的地址位置信息的一系列装置; 以及记录激光功率控制电路113，用于根据摆动振幅信息将记录激光功率控制到适于记录的功率。

10. 发明授权

US07558171B2 Optical disc recording/playback apparatus 失效
标题翻译：光盘记录/播放装置
公开(公告)号：US07558171B2
公开(公告)日：2009-07-07
申请号：US11269586
申请日：2005-11-09
申请人： Youichi Ogura , Toshihiko Takahashi , Hiroaki Hayashi , Teruhiko Izumi , Dai Ichiryu , Shinichi Konishi
发明人： Youichi Ogura , Toshihiko Takahashi , Hiroaki Hayashi , Teruhiko Izumi , Dai Ichiryu , Shinichi Konishi
IPC分类号： G11B15/52
CPC分类号： G11B7/0053 , G11B7/00375 , G11B7/1263 , G11B7/24082 , G11B20/10009 , G11B20/1403 , G11B27/24 , G11B2220/2575
摘要： An optical disc recording/playback apparatus is provided with a first AD converter 35 for shaping a push-pull signal 14 detected from an optical disc medium 1 by a light difference signal shaping circuit 21, and converting the signal into a digital sampling signal 38 using a sampling clock 37 synchronized with a channel frequency; a series of means for detecting wobble amplitude information 77 during recording from the digital sampling signal 38; a series of means for detecting address polarity information 60 and address position information during playback; and a recording laser power control circuit 113 for controlling a recording laser power to a power suited for recording on the basis of the wobble amplitude information.
摘要翻译：光盘记录/重放装置设置有第一AD转换器35，用于通过光差信号整形电路21对从光盘介质1检测到的推挽信号14进行整形，并且将信号转换成数字采样信号38，使用与信道频率同步的采样时钟37; 用于在从数字采样信号38记录期间检测摆动幅度信息77的一系列装置; 用于检测地址极性信息60和播放期间的地址位置信息的一系列装置; 以及记录激光功率控制电路113，用于根据摆动振幅信息将记录激光功率控制到适于记录的功率。

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