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：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：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：US07936653B2

公开(公告)日：2011-05-03

申请号：US12163583

申请日：2008-06-27

申请人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

发明人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0053 ,  G11B19/12

摘要： An information processing device is a device for processing specific information recorded to a recording medium, and has a characteristic identification unit and a processing unit. The characteristic identification unit identifies the reflection characteristic of the recording medium. The processing unit processes the specific information recorded to the recording medium according to the identified reflection characteristic. The reflection characteristic is either a first characteristic such that the reflectance of light reflected by a recorded region of the recording medium (referred to as first reflectance) is greater than the reflectance of light reflected by an unrecorded region of the recording medium (referred to as second reflectance), or a second characteristic such that the first reflectance is less than the second reflectance.

摘要翻译： 信息处理装置是用于处理记录在记录媒体上的特定信息的装置，具有特征识别部和处理部。 特征识别单元识别记录介质的反射特性。 处理单元根据所识别的反射特性来处理记录在记录介质上的特定信息。 反射特性是由记录介质的记录区域反射的光的反射率（被称为第一反射率）大于由记录介质的未记录区域反射的光的反射率的第一特性（称为第一反射率 第二反射率）或第二特性使得第一反射率小于第二反射率。

公开(公告)号：US07848198B2

公开(公告)日：2010-12-07

申请号：US11666884

申请日：2005-10-14

申请人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

发明人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0053 ,  G11B19/12

摘要： An information processing device for processing specific information recorded to a recording medium that has a characteristic identification unit and a processing unit. The characteristic identification unit identifies the reflection characteristic of the recording medium. The processing unit processes the specific information recorded to the recording medium according to the identified reflection characteristic. The reflection characteristic is either a first characteristic such that the reflectance of light reflected by a recorded region of the recording medium (referred to as first reflectance) is greater than the reflectance of light reflected by an unrecorded region of the recording medium (referred to as second reflectance), or a second characteristic such that the first reflectance is less than the second reflectance.

摘要翻译： 一种用于处理记录在具有特征识别单元和处理单元的记录介质上的特定信息的信息处理设备。 特征识别单元识别记录介质的反射特性。 处理单元根据所识别的反射特性来处理记录在记录介质上的特定信息。 反射特性是由记录介质的记录区域反射的光的反射率（被称为第一反射率）大于由记录介质的未记录区域反射的光的反射率的第一特性（称为第一反射率 第二反射率）或第二特性使得第一反射率小于第二反射率。

公开(公告)号：US20090010121A1

公开(公告)日：2009-01-08

申请号：US12163563

申请日：2008-06-27

申请人： Harumitsu MIYASHITA ,  Junichi Minamino ,  Takeshi Nakajima

发明人： Harumitsu MIYASHITA ,  Junichi Minamino ,  Takeshi Nakajima

IPC分类号： G11B27/36

CPC分类号： G11B7/00736 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0053 ,  G11B19/12

摘要： An information processing device (225) is a device for processing specific information recorded to a recording medium (100), and has a characteristic identification unit (204) and a processing unit (226). The characteristic identification unit (204) identifies the reflection characteristic of the recording medium (100). The processing unit (226) processes the specific information recorded to the recording medium (100) according to the identified reflection characteristic. The reflection characteristic is either a first characteristic such that the reflectance of light reflected by a recorded region of the recording medium (100) (referred to as first reflectance) is greater than the reflectance of light reflected by an unrecorded region of the recording medium (100) (referred to as second reflectance), or a second characteristic such that the first reflectance is less than the second reflectance.

摘要翻译： 信息处理装置（225）是用于处理记录在记录介质（100）上的特定信息的装置，具有特征识别部（204）和处理部（226）。 特征识别单元（204）识别记录介质（100）的反射特性。 处理单元（226）根据所识别的反射特性来处理记录到记录介质（100）的特定信息。 反射特性是由记录介质（100）的记录区域反射的光的反射率（被称为第一反射率）大于由记录介质的未记录区域反射的光的反射率的第一特性（ 100）（称为第二反射率）或第二特性，使得第一反射率小于第二反射率。

公开(公告)号：US20080112288A1

公开(公告)日：2008-05-15

申请号：US11666884

申请日：2005-10-14

申请人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

发明人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

IPC分类号： G11B27/36

CPC分类号： G11B7/00736 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0053 ,  G11B19/12

摘要： An information processing device (225) is a device for processing specific information recorded to a recording medium (100), and has a characteristic identification unit (204) and a processing unit (226). The characteristic identification unit (204) identifies the reflection characteristic of the recording medium (100). The processing unit (226) processes the specific information recorded to the recording medium (100) according to the identified reflection characteristic. The reflection characteristic is either a first characteristic such that the reflectance of light reflected by a recorded region of the recording medium (100) (referred to as first reflectance) is greater than the reflectance of light reflected by an unrecorded region of the recording medium (100) (referred to as second reflectance), or a second characteristic such that the first reflectance is less than the second reflectance.

摘要翻译： 信息处理装置（225）是用于处理记录在记录介质（100）上的特定信息的装置，具有特征识别部（204）和处理部（226）。 特征识别单元（204）识别记录介质（100）的反射特性。 处理单元（226）根据所识别的反射特性来处理记录到记录介质（100）的特定信息。 反射特性是由记录介质（100）的记录区域反射的光的反射率（被称为第一反射率）大于由记录介质的未记录区域反射的光的反射率的第一特性（ 100）（称为第二反射率）或第二特性，使得第一反射率小于第二反射率。

公开(公告)号：US07924673B2

公开(公告)日：2011-04-12

申请号：US12163563

申请日：2008-06-27

申请人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

发明人： Harumitsu Miyashita ,  Junichi Minamino ,  Takeshi Nakajima

IPC分类号： G11B7/00

CPC分类号： G11B7/00736 ,  G11B7/004 ,  G11B7/005 ,  G11B7/0053 ,  G11B19/12

摘要： An information processing device processes specific information recorded on a recording medium, and has a characteristic identification unit and a processing unit. The characteristic identification unit identifies the reflection characteristic of the recording medium. The processing unit processes the specific information recorded on the recording medium according to the identified reflection characteristic. The reflection characteristic is either a first characteristic such that the reflectance of light reflected by a recorded region of the recording medium (referred to as first reflectance) is greater than the reflectance of light reflected by an unrecorded region of the recording medium (referred to as second reflectance), or a second characteristic such that the first reflectance is less than the second reflectance.

摘要翻译： 信息处理装置处理记录在记录介质上的特定信息，并具有特征识别单元和处理单元。 特征识别单元识别记录介质的反射特性。 处理单元根据所识别的反射特性处理记录在记录介质上的特定信息。 反射特性是由记录介质的记录区域反射的光的反射率（被称为第一反射率）大于由记录介质的未记录区域反射的光的反射率的第一特性（称为第一反射率 第二反射率）或第二特性使得第一反射率小于第二反射率。

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：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.