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1. 发明申请

US20160027468A1 CHANNEL BITWORD PROSESSOR, PRML DECODER, AND OPTICAL INFORMATION RECORDING/REPRODUCING DEVICE 审中-公开
标题翻译：频道BITWORD PROSESSOR，PRML解码器和光信息记录/复制设备
公开(公告)号：US20160027468A1
公开(公告)日：2016-01-28
申请号：US14753345
申请日：2015-06-29
申请人： Hitachi-LG Data Storage, Inc.
发明人： Atsushi KIKUGAWA
IPC分类号： G11B20/12
CPC分类号： G11B20/10277 , G11B20/1403 , G11B20/1833 , G11B2020/1859
摘要： It is an objective of the present invention to provide a technique to balance DSV in channel bit word when using fixed-length run length limited code based on enumeration. A channel bit word processor according to the present invention: evaluates DSV of a channel bit word in NRZI format which is generated on the basis of enumeration; and selects a connection word which causes a minimum absolute value of DSV after connecting a plurality of channel bit words (refer to FIG. 15).
摘要翻译：本发明的目的是提供一种基于枚举使用固定长度游程长度限制码来平衡信道位字中的DSV的技术。根据本发明的信道位字处理器：基于枚举来生成NRZI格式的信道位字的DSV; 并且在连接多个通道位字之后选择导致DSV的最小绝对值的连接字（参见图15）。

2. 发明申请

US20140334282A1 DECODING DEVICE AND DECODING METHOD 有权
标题翻译：解码设备和解码方法
公开(公告)号：US20140334282A1
公开(公告)日：2014-11-13
申请号：US14117475
申请日：2013-03-28
申请人： Panasonic Corporation
发明人： Kohei Nakata , Yasumori Hino , Yuji Takagi , Tsuyoshi Nakasendo
IPC分类号： G11B20/10 , G11B7/005
CPC分类号： G11B20/10 , G11B7/005 , G11B20/10277 , H03M13/1105 , H03M13/1515 , H03M13/41 , H03M13/6331 , H04L1/004
摘要： A decoding device includes: an interference canceling circuit (104) which extracts, from states of 2K-number (where K is a natural number) of detected signals that are likely within a range of K bit width where an interference between bits of the digital information occurs due to predetermined frequency characteristics, most likely 2M-number (where M is a natural number) of detected signals respectively corresponding to states of 2M-number of detected signals which exist within a range of M bit width that is included in the range of K bit width; and a Viterbi decoding circuit (105) which generates a decoded signal by calculating differences between the 2M-number of detected signals extracted by the interference canceling circuit (104) and expectation signals respectively corresponding to the 2M-number of detected signals and also by selecting a transition sequence of a state of a detected signal for which the calculated difference is smallest.
摘要翻译：解码装置包括：干扰消除电路（104），其从2K数（其中K是自然数）的状态提取可能在K位宽度的范围内的检测信号，其中数字的位之间的干扰信息由于预定的频率特性而发生，最可能的2M号码（其中M是自然数），分别对应于存在于包含在该范围内的M位宽度范围内的2M个检测信号的状态的K位宽; 以及维特比解码电路（105），其通过计算由干扰消除电路（104）提取的2M个检测信号与分别对应于2M个检测信号的期望信号之间的差异来产生解码信号，并且还通过选择所计算出的差值最小的检测信号的状态的转换序列。

3. 发明授权

US08797832B2 Decoding method and decoding device 有权
标题翻译：解码方式和解码装置
公开(公告)号：US08797832B2
公开(公告)日：2014-08-05
申请号：US13879694
申请日：2012-09-24
申请人： Panasonic Corporation
发明人： Kohei Nakata
IPC分类号： G11B20/10
CPC分类号： G11B20/105 , G11B20/10009 , G11B20/10268 , G11B20/10277 , H03M13/41
摘要： A discrete Fourier transform circuit (201) calculates a first frequency spectrum in a predetermined frequency range from a detection signal in a predetermined segment. An expectation calculation circuit (202) calculates a second frequency spectrum corresponding to an expectation signal of a pattern of digital information that is present in the predetermined segment and obtained via an optical disc (100). A branch metric calculation circuit (203) calculates a difference between the first frequency spectrum and the second frequency spectrum. A maximum likelihood decoding circuit (207) decodes the digital information by selecting a pattern in which the difference between the first frequency spectrum and the second frequency spectrum is minimized as a decoding result.
摘要翻译：离散傅里叶变换电路（201）根据预定段中的检测信号计算预定频率范围内的第一频谱。期望计算电路（202）计算与通过光盘（100）获得的预定段中存在的数字信息的模式的期望信号相对应的第二频谱。分支度量计算电路（203）计算第一频谱与第二频谱之间的差。最大似然解码电路（207）通过选择第一频谱和第二频谱之间的差最小化的模式来解码数字信息作为解码结果。

4. 发明授权

US08745466B2 Detecting data-write errors 有权
标题翻译：检测数据写错误
公开(公告)号：US08745466B2
公开(公告)日：2014-06-03
申请号：US12852397
申请日：2010-08-06
申请人： Mustafa N. Kaynak , Alessandro Risso , Patrick R. Khayat
发明人： Mustafa N. Kaynak , Alessandro Risso , Patrick R. Khayat
IPC分类号： G11C29/00
CPC分类号： H03M13/13 , G11B20/10064 , G11B20/10074 , G11B20/10175 , G11B20/10277 , G11B20/10296 , G11B20/1833 , G11B2220/252 , H03M13/451 , H03M13/458
摘要： An embodiment of a data read path includes recovery and decoder circuits. The recovery circuit is operable to recover coded data from a storage medium, and the decoder circuit is operable to detect, in the recovered data, a write error that occurred during a writing of the coded data to the storage medium. For example, such an embodiment may allow detection of a write error that occurred while writing data to a bit-patterned storage medium.
摘要翻译：数据读取路径的实施例包括恢复和解码器电路。恢复电路可操作以从存储介质中恢复编码数据，并且解码器电路可操作以在恢复的数据中检测在将编码数据写入存储介质期间发生的写入错误。例如，这样的实施例可以允许检测在将数据写入位图案的存储介质时发生的写入错误。

5. 发明授权

US08441752B1 Dibit pulse extraction methods and systems 有权
标题翻译： Dibit脉冲提取方法和系统
公开(公告)号：US08441752B1
公开(公告)日：2013-05-14
申请号：US11844090
申请日：2007-08-23
申请人： Hongwei Song , Zining Wu , Toai Doan
发明人： Hongwei Song , Zining Wu , Toai Doan
IPC分类号： G11B5/09
CPC分类号： G11B20/10277 , G11B20/10462 , G11B2220/2516
摘要： A receiving device may be configured to derive an oversampled dibit pulse response estimate using symbols sampled at substantially the read channel symbol rate of the receiving device. The receiving device may include a data acquisition circuit configured to digitize data derived from a memory medium, as well as a dibit pulse estimation circuit configured to estimate the oversampled dibit pulse response using symbols sampled at the read channel rate of the receiving device.
摘要翻译：接收设备可以被配置为使用在接收设备的基本读取的信道符号率处采样的符号来导出过采样的双位脉冲响应估计。接收装置可以包括数据获取电路，其被配置为数字化从存储介质导出的数据，以及双向脉冲估计电路，其被配置为使用在接收装置的读取信道速率采样的符号来估计过采样的双脉冲响应。

6. 发明授权

US08390483B2 Coding apparatus, coding method, recording apparatus, recording method, decoding apparatus, and decoding method 失效
标题翻译：编码装置，编码方法，记录装置，记录方法，解码装置和解码方法
公开(公告)号：US08390483B2
公开(公告)日：2013-03-05
申请号：US13097547
申请日：2011-04-29
申请人： Satoru Higashino
发明人： Satoru Higashino
IPC分类号： H03M7/00
CPC分类号： G11B20/1426 , G11B7/24044 , G11B20/10111 , G11B20/1012 , G11B20/1024 , G11B20/10277 , G11B2007/0009 , G11B2007/0013 , G11B2020/1469 , G11B2220/235 , G11B2220/2537 , H03M5/145
摘要： A coding apparatus includes a transform table in which with regard to data words of m bits and code words of n bits where n and m are both integers and also n>m is established, 2m pieces of code words selected to have a tendency that the number of symbols “1” is small among the 2n pieces of code words of n bits are associated with the 2m pieces of data words of m bits and a coding unit that encodes input data words of m bits on the basis of the transform table.
摘要翻译：编码装置包括变换表，其中对于m位的数据字和n位的码字，其中n和m都是整数，并且还建立n> m，所选择的2m个码字具有 n位的2n个码字中的符号数1小，与m位的2m个数据字相关联，编码单位根据变换表对m位的输入数据字进行编码。

7. 发明授权

US08310906B2 Optical disc apparatus and optical disc recording/reproducing method 失效
标题翻译：光盘装置和光盘记录/再现方法
公开(公告)号：US08310906B2
公开(公告)日：2012-11-13
申请号：US12778540
申请日：2010-05-12
申请人： Shinji Fujita
发明人： Shinji Fujita
IPC分类号： G11B7/00 , G11B20/10 , G11B27/36 , G11B7/125 , G11B7/28
CPC分类号： G11B19/12 , G11B7/1369 , G11B7/1381 , G11B7/1387 , G11B20/10009 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10111 , G11B20/1012 , G11B20/10277 , G11B20/10296 , G11B2220/2541
摘要： An optical disc apparatus includes an optical pickup including: a light source; an objective lens for converging a light flux emitted from the light source and forming an optical spot on an information recording plane of an optical disc; and an optical modulation unit divided into a plurality of areas for modulating an area containing a main beam of the light flux to change a shape of the optical spot, wherein data is reproduced by converting a reproduction signal read from the optical disc with the optical pickup into an NRZI signal of a predetermined modulation rule by a PRML method. An optical spot shape, laser power setting and PRML setting are changed with each optical disc and each drive operation state.
摘要翻译：一种光盘装置，包括：光拾取器，包括：光源; 用于会聚从光源发射的光束并在光盘的信息记录平面上形成光点的物镜; 以及光调制单元，被分成多个区域，用于调制包含光束的主光束的区域以改变光点的形状，其中通过用光学拾取器转换从光盘读取的再现信号来再现数据通过PRML方法成为预定调制规则的NRZI信号。每个光盘和每个驱动器操作状态改变光点形状，激光功率设置和PRML设置。

8. 发明授权

US08279720B2 Hard disk apparatus and driving method therefor 有权
标题翻译：硬盘装置及其驱动方法
公开(公告)号：US08279720B2
公开(公告)日：2012-10-02
申请号：US12805187
申请日：2010-07-16
申请人： Motoi Kimura
发明人： Motoi Kimura
IPC分类号： G11B11/00
CPC分类号： G11B5/02 , G11B20/10009 , G11B20/10222 , G11B20/10277 , G11B20/10296 , G11B2005/0005 , G11B2005/0021 , G11B2220/2516
摘要： Disclosed herein is a hard disk apparatus, including: a magnetic recording medium; a recording head adapted to record information on the magnetic recording medium; a semiconductor laser adapted to be controlled for light emission in a cycle of a recording clock to irradiate a light spot upon the magnetic recording medium to carry out thermal assistance in magnetic recording by the recording head; a laser driving circuit adapted to drive the semiconductor laser at a timing and with optical power in accordance with a light emission timing signal and a laser power controlling signal; and a controller adapted to set laser power in accordance with at least one of characteristics of the magnetic recording medium, semiconductor laser and recording head and output the laser power controlling signal to the laser driving circuit so that the laser power is adaptively varied.
摘要翻译：这里公开了一种硬盘装置，包括：磁记录介质; 记录头，适于在磁记录介质上记录信息; 半导体激光器，其适于被控制在记录时钟的周期中的发光，以将光点照射在磁记录介质上，以通过记录头进行磁记录的热辅助; 激光驱动电路，其适于根据发光定时信号和激光功率控制信号在定时和光功率下驱动所述半导体激光器; 以及控制器，其适于根据磁记录介质，半导体激光器和记录头的特性中的至少一个来设置激光功率，并将激光功率控制信号输出到激光驱动电路，使得激光功率自适应地变化。

9. 发明授权

US08261172B1 Viterbi decoder method and apparatus with RI detector in servo channel 有权
标题翻译：维特比解码器方法和装置，其具有RI检测器在伺服信道中
公开(公告)号：US08261172B1
公开(公告)日：2012-09-04
申请号：US13282910
申请日：2011-10-27
申请人： Zaihe Yu , Michael Madden
发明人： Zaihe Yu , Michael Madden
IPC分类号： H03M13/03
CPC分类号： G11B20/10212 , G11B20/10175 , G11B20/10222 , G11B20/10277 , G11B20/10398 , G11B20/20 , H03M13/3961 , H03M13/41 , H03M13/6343
摘要： Apparatus and methods are disclosed for decoding data stored on a data storage medium. A disclosed decoding method and decoder include a radial incoherence (RI) detector that increases the probability of detecting RI and improves the decoding performance in terms of the bit error rate of the decoded signal. RI is detected by comparing an input signal to the decoder against a RI threshold value and generating a RI-type signal. The RI detector may include a filter for filtering out noise and error in the RI-type signal, an adaptive threshold unit that adjusts the RI threshold value based upon the RI-type signal, a transition-based threshold unit that adjusts the RI threshold value based upon each transition in the input signal, or a path-based threshold unit that adjusts the RI threshold value based upon a best surviving path corresponding to the input signal, in combination or alone.
摘要翻译：公开了用于对存储在数据存储介质上的数据进行解码的装置和方法。所公开的解码方法和解码器包括径向不相干（RI）检测器，其增加检测RI的概率，并且根据解码信号的误码率提高解码性能。通过将输入信号与解码器相对于RI阈值进行比较并产生RI型信号来检测RI。 RI检测器可以包括用于滤除RI型信号中的噪声和误差的滤波器，基于RI型信号调整RI阈值的自适应阈值单元，调整RI阈值的基于过渡的阈值单元基于输入信号中的每个转换，或者基于路径的阈值单元，其组合地或组合地基于基于与输入信号对应的最佳幸存路径来调整RI阈值。

10. 发明申请

US20120075970A1 OPTICAL DISC MEDIUM, REPRODUCTION METHOD THEREOF AND REPRODUCTION APPARATUS 有权
标题翻译：光盘介质，其生成方法和复制装置
公开(公告)号：US20120075970A1
公开(公告)日：2012-03-29
申请号：US13182092
申请日：2011-07-13
申请人： Junya Iizuka
发明人： Junya Iizuka
IPC分类号： G11B7/095 , G11B7/007
CPC分类号： G11B20/1024 , G11B7/0053 , G11B7/24082 , G11B7/24085 , G11B20/10277 , G11B20/10342 , G11B20/10407 , G11B20/10509 , G11B20/1217 , G11B2020/1239 , G11B2020/1287 , G11B2220/2541
摘要： The pit arrays on an optical disc medium are made to wobble at a frequency which is higher than the band of frequencies that a tracking servo can follow and which is lower than the band of frequencies of the reproducing signal. A wobble detection signal according to the amount of wobble is obtained from the tracking error signal and used as a reference signal for frequency acquisition. Alternatively, the pit arrays on the medium are wobbled at a frequency which is within the band of frequencies that the tracking servo can follow and which is lower than the band of frequencies of the reproducing signal. In addition, a wobble detection signal corresponding to the amount of wobble is obtained either from the output signal from a compensator included in a tracking servo system or from a tracking drive signal and is used as a reference signal for frequency acquisition.
摘要翻译：使光盘介质上的凹坑阵列以比跟踪伺服可以跟随的频带的频率高的频率摆动，并且低于再现信号的频带。从跟踪误差信号获得根据摆动量的摆动检测信号，并用作频率采集的参考信号。或者，介质上的凹坑阵列以跟踪伺服可以跟随的频率带内的频率摆动，并且低于再现信号的频带。此外，从跟踪伺服系统中包括的补偿器的输出信号或跟踪驱动信号中获得与摆动量相对应的摆动检测信号，并将其用作用于频率采集的参考信号。

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