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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.
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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.
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公开(公告)号：US06618337B2
公开(公告)日：2003-09-09
申请号：US09770778
申请日：2001-01-26
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.
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4.发明授权Asymmetry detection apparatus, jitter detection apparatus, and recording/reproduction apparatus 有权不对称检测装置，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
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。
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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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公开(公告)号：US07539097B2
公开(公告)日：2009-05-26
申请号：US11234212
申请日：2005-09-26
申请人： Youichi Ogura , Toshihiko Takahashi , Teruhiko Izumi , Shinichi Konishi , Hironori Deguchi , Takamasa Sakai
发明人： Youichi Ogura , Toshihiko Takahashi , Teruhiko Izumi , Shinichi Konishi , Hironori Deguchi , Takamasa Sakai
IPC分类号： G11B20/00
CPC分类号： G11B20/10009 , G11B7/131 , G11B20/1403 , G11B2020/122 , G11B2020/1239 , G11B2020/1268
摘要： An optical disk device is provided with a first analog-to-digital converter for converting a push-pull signal detected from an optical disc medium into a digital sampling signal according to a sampling clock in the vicinity of a channel frequency. The optical disk device also includes an address polarity information detection circuit for detecting address polarity information from the digital sampling signal, and an address position information detection circuit for detecting address position information from the digital sampling signal while maintaining continuity.
摘要翻译： 光盘装置具有第一模数转换器，用于根据通道频率附近的采样时钟将从光盘介质检测到的推挽信号转换为数字采样信号。 光盘装置还包括用于从数字采样信号检测地址极性信息的地址极性信息检测电路，以及用于在保持连续性的同时从数字采样信号检测地址位置信息的地址位置信息检测电路。
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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。
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公开(公告)号：US20060208766A1
公开(公告)日：2006-09-21
申请号：US11372051
申请日：2006-03-10
CPC分类号： G11B20/10212 , G11B20/10037 , G11B20/10046 , G11B20/10194 , G11B20/10425 , G11B20/10481 , G11B20/14 , G11B20/22 , G11B2220/2537
摘要： In a jitter detection apparatus, a playback RF signal 3 detected from an optical disc medium 1 is subjected to waveform shaping, and thereafter, converted into a digital RF signal 6 with a sampling clock having a cycle twice as long as a cycle of a channel clock. Thereafter, an offset variation in a high-frequency band is corrected by an offset correction circuit 9, and data which are missing in the time direction are restored by a Nyquist interpolation filter 23. Then, positions where jitter is to be extracted are selected from an output signal of the Nyquist interpolation filter 23, by a jitter detection preprocessing circuit 28, according to the playback speed of the optical disc medium 1 and the arithmetic capacity of a digital signal operation circuit 29, whereby highly accurate jitters can be extracted by using the digital signal operation circuit 29.
摘要翻译： 在抖动检测装置中，从光盘介质1检测到的重放RF信号3经受波形整形，然后被转换成具有采样时钟的数字RF信号6，采样时钟的周期是通道的周期的两倍 时钟。 此后，通过偏移校正电路9校正高频带中的偏移变化，并且通过奈奎斯特内插滤波器23恢复在时间方向上丢失的数据。然后，从提取抖动的位置选择 奈奎斯特插值滤波器23的输出信号，通过抖动检测预处理电路28，根据光盘介质1的重放速度和数字信号操作电路29的运算能力，由此可以通过使用高精度的抖动来提取高精度的抖动 数字信号运算电路29。
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公开(公告)号：US20060077828A1
公开(公告)日：2006-04-13
申请号：US11234212
申请日：2005-09-26
申请人： Youichi Ogura , Toshihiko Takahashi , Teruhiko Izumi , Shinichi Konishi , Hironori Deguchi , Takamasa Sakai
发明人： Youichi Ogura , Toshihiko Takahashi , Teruhiko Izumi , Shinichi Konishi , Hironori Deguchi , Takamasa Sakai
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B7/131 , G11B20/1403 , G11B2020/122 , G11B2020/1239 , G11B2020/1268
摘要： An optical disk device is provided with a first analog-to-digital converter for converting a push-pull signal detected from an optical disc medium into a digital sampling signal according to a sampling clock in the vicinity of a channel frequency, an address polarity information detection circuit for detecting address polarity information from the digital sampling signal, and an address position information detection circuit 58 for detecting address position information from the digital sapling signal while maintaining continuity. Therefore, it is possible to detect the address polarity information and the address position information stably and accurately even during high-speed recording/playback.
摘要翻译： 光盘装置具有第一模数转换器，用于根据通道频率附近的采样时钟将从光盘介质检测到的推挽信号转换为数字采样信号，地址极性信息 用于从数字采样信号检测地址极性信息的检测电路，以及用于在保持连续性的同时从数字树苗信号中检测地址位置信息的地址位置信息检测电路58。 因此，即使在高速记录/重放期间，也可以稳定且精确地检测地址极性信息和地址位置信息。
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公开(公告)号：US07433286B2
公开(公告)日：2008-10-07
申请号：US11372051
申请日：2006-03-10
IPC分类号： G11B7/00
CPC分类号： G11B20/10212 , G11B20/10037 , G11B20/10046 , G11B20/10194 , G11B20/10425 , G11B20/10481 , G11B20/14 , G11B20/22 , G11B2220/2537
摘要： In a jitter detection apparatus, a playback RF signal 3 detected from an optical disc medium 1 is subjected to waveform shaping, and thereafter, converted into a digital RF signal 6 with a sampling clock having a cycle twice as long as a cycle of a channel clock. Thereafter, an offset variation in a high-frequency band is corrected by an offset correction circuit 9, and data that are missing in the time direction are restored by a Nyquist interpolation filter 23. Then, positions where jitter is to be extracted are selected from an output signal of the Nyquist interpolation filter 23, by a jitter detection preprocessing circuit 28, according to the playback speed of the optical disc medium 1 and the arithmetic capacity of a digital signal operation circuit 29, whereby highly accurate jitters can be extracted by using the digital signal operation circuit 29.
摘要翻译： 在抖动检测装置中，从光盘介质1检测到的重放RF信号3经受波形整形，然后被转换成具有采样时钟的数字RF信号6，采样时钟的周期是通道的周期的两倍 时钟。 此后，通过偏移校正电路9校正高频带中的偏移变化，并且通过奈奎斯特内插滤波器23恢复在时间方向上丢失的数据。 然后，根据光盘介质1的重放速度和数字信号操作的运算能力，由抖动检测预处理电路28从奈奎斯特插值滤波器23的输出信号中选择要提取抖动的位置 电路29，由此可以通过使用数字信号操作电路29提取高精度的抖动。
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