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1. 发明专利

JP5234966B2 Information reproducing apparatus and method, and computer program 有权
公开(公告)号：JP5234966B2
公开(公告)日：2013-07-10
申请号：JP2008548139
申请日：2006-12-05
申请人：パイオニア株式会社
发明人：儀央佐々木 , 庄悟宮鍋 , 裕行内野
IPC分类号： G11B20/14 , G11B7/005 , G11B20/10 , G11B20/18
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/10111 , G11B20/1012 , G11B2220/2541

2. 发明专利

JP2010182414A Optical information device, optical storage medium, optical storage medium inspection apparatus, and optical storage medium inspection method 有权
标题翻译：光学信息装置，光存储介质，光存储介质检查装置和光存储介质检查方法
公开(公告)号：JP2010182414A
公开(公告)日：2010-08-19
申请号：JP2010095000
申请日：2010-04-16
申请人： Panasonic Corp , パナソニック株式会社
发明人： KADOWAKI SHINICHI , SHOJI MAMORU , NAKAMURA ATSUSHI , ISHIDA TAKASHI
IPC分类号： G11B7/005 , G01N21/95 , G01R31/312 , G01R31/317 , G11B7/0037 , G11B7/007 , G11B7/24 , G11B20/10 , G11B20/14
CPC分类号： G01R31/31709 , G01N21/9506 , G01R31/312 , G11B7/00375 , G11B7/00456 , G11B7/00458 , G11B20/10009 , G11B20/10027 , G11B20/10055 , G11B20/10111 , G11B20/10296 , G11B20/10481 , G11B20/1217 , G11B20/1426 , G11B20/225 , G11B2020/1239 , G11B2020/1274 , G11B2020/1298 , G11B2220/2537
摘要： PROBLEM TO BE SOLVED: To provide an optical storage medium and optical information device that can record or reproduce data with high reliability even when using an optical storage medium in which jitter from the shortest marks and spaces is worse than jitter from marks and spaces longer than the shortest marks and spaces. SOLUTION: The optical information device has an optical pickup head that emits a light beam to the optical storage medium, detects the light beam reflected from the optical storage medium, and outputs a signal based on the received reflected light, a jitter measuring unit for measuring jitter in signals outputted from the optical pickup head and an evaluation unit for determining from the measured jitter if the optical storage medium is good or defective. The jitter measuring unit measures jitter in a train of 3T or longer marks or spaces from an optical storage medium to which digital information is recorded as a train of marks or spaces of length kT based on a period T and an integer k of two or more. COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：要解决的问题：提供一种光存储介质和光信息设备，其即使在使用来自最短标记和空格的抖动比来自标记的抖动更差的光存储介质的情况下也可以高可靠性地记录或再现数据，以及空间长于最短的标记和空格。光信息装置具有向光存储介质发射光束的光拾取头，检测从光存储介质反射的光束，并输出基于所接收的反射光的信号，抖动测量用于测量从光学拾取头输出的信号中的抖动的单元和用于根据所测量的抖动确定光学存储介质是好还是有缺陷的评估单元。抖动测量单元测量基于周期T和两个或更多个整数k的记录数字信息作为长度kT的标记或间隔的光标的光存储介质的3T或更长的标记或间隔的列的抖动。版权所有（C）2010，JPO＆INPIT

3. 发明专利

JP2009070455A Optical reading method and optical reading system 有权
标题翻译：光学读取方法和光学读取系统
公开(公告)号：JP2009070455A
公开(公告)日：2009-04-02
申请号：JP2007236269
申请日：2007-09-12
申请人： Tdk Corp , Tdk株式会社
发明人： KIKUKAWA TAKASHI , TANAKA KAZUYUKI
IPC分类号： G11B7/005 , G11B20/10
CPC分类号： G11B7/005 , G11B20/10009 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10101 , G11B20/10111 , G11B20/1012 , G11B2007/0013 , G11B2007/24312 , G11B2007/24314 , G11B2007/2432
摘要： PROBLEM TO BE SOLVED: To improve read signal quality while increasing its linear recording density. SOLUTION: An optical recording medium 1 in which the distance from a light incident surface to an information recording layer is less than 100 μm is irradiated with a laser beam through an objective lens and information stored in the information recording layer is read by means of a PRML identification method. At this time, the constraint length n in the PRML identification method is set to an integer which satisfies 0.5x(λ/NA)/(LV/f)-1 COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提高读取信号质量，同时提高其线性记录密度。解决方案：其中从光入射表面到信息记录层的距离小于100μm的光学记录介质1通过物镜被激光束照射，并且存储在信息记录层中的信息被读取 PRML识别方法的手段。此时，将PRML识别方法中的约束长度n设定为满足0.5×（λ/ NA）/（LV / f）-1

4. 发明专利

JPWO2006100981A1 情報記録媒体、情報再生装置、情報再生方法审中-公开
公开(公告)号：JPWO2006100981A1
公开(公告)日：2008-09-04
申请号：JP2007509219
申请日：2006-03-15
申请人：日本電気株式会社
发明人：博巳本間 , 博巳本間
IPC分类号： G11B20/14 , G11B20/10 , G11B20/12
CPC分类号： G11B20/1403 , G11B20/10009 , G11B20/10055 , G11B20/10111 , G11B20/1012 , G11B20/10222 , G11B20/10296 , G11B20/10425 , G11B2020/1287 , G11B2020/1442 , G11B2020/1476 , G11B2220/213 , H03L7/08
摘要：情報再生装置はデータパルス化部(8、11、12、14、15、16、17、18、25)と検出部(21、23)とを具備する。データパルス化部は、情報記録媒体(7)から再生される再生信号に同期して再生信号を2値情報に変換し、変換された2値情報をパルス化出力信号として出力する。検出部(21、23)は、パルス化出力信号に基づいて、データパルス化部が同期外れか否かを示す判定結果をデータパルス化部に出力する。判定結果が同期外れを示すとき、データパルス化部は、所定の固定された動作パラメータを設定して同期外れの回復動作を行う。こうして、トラック蛇行信号が得られないROMディスク、あるいは、トラック蛇行信号のSNRが低い場合でも、再生PLLの同期外れを正しく判定し、PLLの高速引き込み適応等化器とオフセット補償器の高安定化を実現する。

5. 发明专利

JP2007334954A Reproducing device and method 有权
标题翻译：再现设备和方法
公开(公告)号：JP2007334954A
公开(公告)日：2007-12-27
申请号：JP2006163410
申请日：2006-06-13
申请人： Sony Corp , ソニー株式会社
发明人： HAYASHI KENICHI
IPC分类号： G11B20/14
CPC分类号： G11B20/24 , G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10101 , G11B20/10111 , G11B20/10212 , G11B20/10222 , G11B20/10296 , G11B20/10425 , G11B20/14 , G11B2020/1239 , G11B2020/1268 , G11B2020/1274 , G11B2020/1287 , G11B2020/1453 , G11B2220/2541
摘要： PROBLEM TO BE SOLVED: To improve reproduction performance by dealing with bit errors caused by waveform distortion during reproduction of a recording medium of low recording signal quality when a PRML system is used.
SOLUTION: In consideration that distortion occurring in a recording medium such as an optical disk and the operation of a maximum-likelihood decoding part, the amplitude value of an equalizing signal is evaluated (signal input to the maximum-likelihood decoding part) corresponding to a shortest code detected by the maximum-likelihood decoding part, to determine whether the decoded shortest code is correct. When the result of the determination indicates an error, the decoded shortest code is corrected, so that, a bit error rate is improved for a distorted signal as compared with a normal signal detection by maximum-likelihood decoding.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：当使用PRML系统时，通过处理在低记录信号质量的记录介质的再现期间由波形失真引起的位错误来提高再现性能。考虑到在诸如光盘的记录介质中发生的失真和最大似然解码部分的操作，评估均衡信号的振幅值（输入到最大似然解码部分的信号）对应于由最大似然解码部分检测的最短码，以确定解码的最短码是否正确。当确定结果指示错误时，解码的最短代码被校正，使得与通过最大似然解码的正常信号检测相比，畸变信号的误码率得到改善。版权所有（C）2008，JPO＆INPIT

6. 发明专利

JP3848049B2 Reproduced signal evaluation method, information recording medium, and an information reproducing apparatus 有权
公开(公告)号：JP3848049B2
公开(公告)日：2006-11-22
申请号：JP2000106639
申请日：2000-04-07
申请人：株式会社東芝
发明人：秀夫安東 , 豊岡本 , 康一平山 , 裕柏原 , 長作能弾
IPC分类号： G11B20/10 , G11B5/012 , G11B5/09 , G11B7/005 , G11B20/14
CPC分类号： G11B7/005 , G11B5/012 , G11B5/09 , G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10101 , G11B20/10111 , G11B20/10212 , G11B20/10296 , G11B20/10425

7. 发明专利

JP2005332437A Reproduced signal evaluation method and information recording and reproducing apparatus 审中-公开
标题翻译：重现信号评估方法和信息记录和再现设备
公开(公告)号：JP2005332437A
公开(公告)日：2005-12-02
申请号：JP2004147855
申请日：2004-05-18
申请人： Canon Inc , キヤノン株式会社
发明人： MIYAOKA YASUYUKI
IPC分类号： G11B20/10 , G11B20/18
CPC分类号： G11B20/10009 , G11B20/10111 , G11B20/10296 , G11B20/10481 , G11B20/1833
摘要： PROBLEM TO BE SOLVED: To provide a reproduced signal evaluating method aiming at polarity transition of a reproduced signal, namely polarity change of a recording mark sequence in an index correlative with the error rate of the binarized result obtained by maximum likelihood decoding.
SOLUTION: A recording series of a state transition stream having a prescribed Euclidean distance in the maximum likelihood decoding is detected corresponding to the polarity change of recording codes of the recording series, a likelihood difference of the state transition stream between the most certain state transition stream from a branch of the state transition stream to a junction of the state transition stream in the recording series and the second certain state transition stream is obtained and statistical processing of the likelihood difference is individually performed corresponding to polarity change of the recording series to evaluate the quality of the reproduced signal.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种针对再现信号的极性转换的再生信号评估方法，即与通过最大似然解码获得的二值化结果的误差率相关的指标中的记录标记序列的极性变化。解决方案：根据记录系列的记录代码的极性变化来检测在最大似然解码中具有规定的欧几里德距离的状态转换流的记录系列，状态转换流在最确定之间的似然性差异获得从状态转移流的分支到记录序列中的状态转移流和第二特定状态转换流的结的状态转换流，并根据记录系列的极性变化分别执行似然度差的统计处理以评估再现信号的质量。版权所有（C）2006，JPO＆NCIPI

8. 发明专利

JPWO2003088221A1 光情報装置及び光記憶媒体及び光記憶媒体検査装置及び光記憶媒体検査方法审中-公开
公开(公告)号：JPWO2003088221A1
公开(公告)日：2005-08-25
申请号：JP2003585075
申请日：2003-04-02
申请人：松下電器産業株式会社
发明人：門脇　慎一 , 慎一門脇 , 東海林　衛 , 衛東海林 , 中村　敦史 , 敦史中村 , 石田　隆 , 隆石田
IPC分类号： G11B7/004 , G01N21/95 , G01R31/312 , G01R31/317 , G11B7/0037 , G11B7/005 , G11B7/24 , G11B7/26 , G11B20/10 , G11B20/14
CPC分类号： G01R31/31709 , G01N21/9506 , G01R31/312 , G11B7/00375 , G11B7/00456 , G11B7/00458 , G11B20/10009 , G11B20/10027 , G11B20/10055 , G11B20/10111 , G11B20/10296 , G11B20/10481 , G11B20/1217 , G11B20/1426 , G11B20/225 , G11B2020/1239 , G11B2020/1274 , G11B2020/1298 , G11B2220/2537
摘要：この光情報装置は、光ビームを光記憶媒体に照射して、前記光記憶媒体から反射された光ビームを受光して、受光した光に基づく信号を出力する光ピックアップヘッドと、前記光ピックアップヘッドから出力される信号のジッタを計測するジッタ計測部と、前記計測したジッタから前記光記憶媒体が良品か不良品かを判別する判別部とを備え、前記ジッタ計測部は、デジタル情報が2以上の整数kと周期Tを基本とする長さがkTのマーク又はスペース列として記録されている前記光記憶媒体に対して、3T以上のマーク又はスペース列についてのジッタを計測する。

9. 发明专利

JP2005166221A Information reproducing method and apparatus 审中-公开
标题翻译：信息再现方法和装置
公开(公告)号：JP2005166221A
公开(公告)日：2005-06-23
申请号：JP2003407577
申请日：2003-12-05
申请人： Canon Inc , キヤノン株式会社
发明人： KATAYAMA TATSUSHI
IPC分类号： G11B20/14 , G11B20/10 , G11B20/18 , H03M13/39 , H03M13/41 , H03M13/45 , H04L1/00
CPC分类号： H04L1/0054 , G11B20/10009 , G11B20/10111 , H03M13/1102 , H03M13/19 , H03M13/2957 , H03M13/3905 , H03M13/41
摘要： PROBLEM TO BE SOLVED: To provide an apparatus which correctly applies maximum likelihood decoding to a reproduced signal in which nonlinear distortion such as asymmetry is present.
SOLUTION: An information reproducing apparatus uses the maximum likelihood decoding for calculating the likelihood of the reproduced signal value obtained from a recording medium to two or more reference values, and decodes the reproduced signal on the basis of the likelihood. The information reproducing device includes: an asymmetry detector for detecting two or more discrimination values corresponding to the asymmetry of the reproduced signal from the reproduced signal obtained from the recording medium; a judgment part 30 for judging to which level range between the discrimination values the reproduced signal belongs; a calculation part 31 for normalizing the reproduced signal on the basis of the judgment result of the judgment part, the reproduced signal, and the two or more discrimination values, and obtaining the likelihood of the normalized reproduced signal value.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种将最大似然解码正确地应用于存在诸如不对称性的非线性失真的再现信号的装置。解决方案：信息再现装置使用最大似然解码来计算从记录介质获得的再现信号值的似然性为两个或更多个参考值，并且基于似然性对再现信号进行解码。信息再现装置包括：不对称检测器，用于根据从记录介质获得的再现信号检测对应于再现信号的不对称性的两个或更多个鉴别值; 用于判断再现信号所属的鉴别值之间的哪个电平范围的判断部分30; 计算部分31，用于根据判断部分的判断结果，再现信号和两个或多个鉴别值对再生信号进行归一化，并获得归一化再生信号值的可能性。版权所有（C）2005，JPO＆NCIPI

10. 发明专利

JP2004326839A Information reproducing method and device using the same 有权
公开(公告)号：JP2004326839A
公开(公告)日：2004-11-18
申请号：JP2003115871
申请日：2003-04-21
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： MINEMURA HIROYUKI
IPC分类号： G11B20/14 , G11B7/005 , G11B20/10
CPC分类号： G11B20/10148 , G11B7/005 , G11B20/10009 , G11B20/10055 , G11B20/10083 , G11B20/10101 , G11B20/10111
摘要： PROBLEM TO BE SOLVED: To provide an information reproducing method for enabling dealing with a large capacity and the signals of different minimum run lengths, and an optical disk device using the same.
SOLUTION: A PRML system is used to establish a target value by adding a compensation amount according to the bit string of N (N>NN) bits to a target value set by the convolution calculation of NN bits, and to binarize it to be a surest bit string in which an error between a reproducing signal and the target value becomes minimum among the bit strings of N bits while comparing reproducing signals with each other.
COPYRIGHT: (C)2005,JPO&NCIPI

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