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1. 发明申请

US20190130942A1 CLOCK DATA RECOVERY IN MULTILANE DATA RECEIVER 审中-公开
公开(公告)号：US20190130942A1
公开(公告)日：2019-05-02
申请号：US15802365
申请日：2017-11-02
申请人： KANDOU LABS, S.A.
发明人： Ali Hormati , Armin Tajalli
IPC分类号： G11B20/10 , H04L7/033 , G06F15/82 , H03L7/099
CPC分类号： G11B20/10398 , G06F13/4063 , G06F15/82 , H03L7/085 , H03L7/099 , H04L7/0331
摘要： Methods and systems are described for obtaining, at a phase-error aggregator, a plurality of data-derived phase-error signals for two or more data lanes of a multi-wire bus, each data-derived phase-error signal generated using at least (i) a phase of one or more phases of a local oscillator signal and (ii) a corresponding data signal associated with one of the two or more data lanes, generating a composite phase-error signal representing a combination of the two or more obtained data-derived phase-error signals, receiving the composite phase-error signal at a loop filter responsively generating an oscillator control signal, and receiving the oscillator control signal at a local oscillator and responsively adjusting a timing of the local oscillator to adjust the one or more phases of the local oscillator signal.

2. 发明申请

US20170256280A1 OPTICAL DISC APPARATUS CONTROLLING IRRADIATION POSITION BASED ON CROSS-CORRELATION VALUE BETWEEN REPRODUCTION SIGNAL AND DECODED SIGNAL 有权
公开(公告)号：US20170256280A1
公开(公告)日：2017-09-07
申请号：US15335835
申请日：2016-10-27
申请人： Panasonic Intellectual Property Management Co., Ltd.
发明人： Kohei NAKATA
IPC分类号： G11B7/09 , G11B7/1353 , G11B20/18 , G11B7/005 , G11B7/13
CPC分类号： G11B7/094 , G11B7/0037 , G11B7/005 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/0943 , G11B7/13 , G11B7/1353 , G11B7/1381 , G11B20/10009 , G11B20/10388 , G11B20/10398 , G11B20/10462 , G11B20/18
摘要： In an optical disc apparatus for reproducing information recorded on a track of an optical disc, an optical head irradiates a light beam onto the track, detects a reflected light reflected by the track, and generates a reproduction signal based on the reflected light. A decoder circuit decodes the reproduction signal, and generates a decoded signal including information recorded on the track. A correlation detector circuit calculates a cross-correlation value between the reproduction signal and the decoded signal. A servo circuit detects a deviation amount of an irradiation position of the light beam onto the track, from the reproduction signal, and controls the irradiation position of the optical head based on the cross-correlation value and the deviation amount.

3. 发明授权

US09293168B2 Quality evaluation method, information recording medium, optical disc device and recording/reproducing system 有权
标题翻译：质量评估方法，信息记录介质，光盘装置和记录/再现系统
公开(公告)号：US09293168B2
公开(公告)日：2016-03-22
申请号：US14167369
申请日：2014-01-29
申请人： Hitachi Consumer Electronics Co., Ltd. , Hitachi-LG Data Storage, Inc.
发明人： Yoshitaka Morimoto , Soichiro Eto , Koichi Watanabe
IPC分类号： G11B7/004 , G11B20/18 , G11B20/10
CPC分类号： G11B20/182 , G11B20/10305 , G11B20/10333 , G11B20/10398
摘要： When data is recorded on an optical disc, and stored for a long period of time, there is a need to periodically evaluate whether a quality of the recorded data is determined with time, or not. If the signal quality is lower than a given level as an evaluation result, a work for moving the data to a brand-new optical disc is required. However, in periodical inspection, if the number of optical discs is enormous, a large amount of time is required to evaluate all data recorded on the optical disc. In recording user data on the optical disc, a signal of a particular pattern having a lifetime shorter than a reference lifetime of the user data is recorded in a given area of the optical disc in advance, the particular pattern signal is reading at given time intervals, and processing on the user data is determined on the basis of the evaluation result of the signal quality.
摘要翻译：当数据被记录在光盘上并且长时间存储时，需要周期性地评估是否随时间确定记录数据的质量。如果信号质量低于给定的水平作为评估结果，则需要将数据移动到全新光盘的工作。然而，在定期检查中，如果光盘数量巨大，则需要大量的时间来评估记录在光盘上的所有数据。在光盘上记录用户数据时，预先将具有比用户数据的参考寿命短的寿命的特定模式的信号预先记录在光盘的给定区域中，特定模式信号以给定时间间隔读取并且基于信号质量的评估结果确定对用户数据的处理。

4. 发明授权

US09129623B2 Method and system for measuring noise of a magnetic head 有权
标题翻译：用于测量磁头噪声的方法和系统
公开(公告)号：US09129623B2
公开(公告)日：2015-09-08
申请号：US12923289
申请日：2010-09-13
申请人： Wahchun Chan , Tszlok Cheng , Shengqiang Chen
发明人： Wahchun Chan , Tszlok Cheng , Shengqiang Chen
IPC分类号： G01R33/12 , G11B5/455 , G11B20/10 , G11B5/39
CPC分类号： G11B5/455 , G11B5/39 , G11B20/10009 , G11B20/10046 , G11B20/10398 , G11B2220/2516
摘要： A method for measuring noise of a magnetic head includes setting a plurality of threshold values, applying bias current or voltage to a read element of the magnetic head, applying an external transverse magnetic field to the magnetic head, amplifying output signal from the read element to produce an amplified signal, filtering the amplified signal to produce a filtered signal, generating an enable signal for each threshold value in a predetermined time window by a counting control means with input signals which include the filtered signal and the threshold value, measuring the cumulative time duration of each enable signal, making an amplitude-duration distribution according to the cumulative time durations and the threshold values, calculating a plurality of parameters according to the amplitude-duration distribution and analyzing the parameters with a plurality of predetermined criteria to determine the defects of the magnetic head. Accordingly, the invention also discloses a system for measuring noise of a magnetic head.
摘要翻译：用于测量磁头噪声的方法包括设置多个阈值，向磁头的读取元件施加偏置电流或电压，向磁头施加外部横向磁场，将来自读取元件的输出信号放大到产生放大的信号，对放大的信号进行滤波以产生经滤波的信号，通过具有包括滤波信号和阈值的输入信号的计数控制装置在预定时间窗中产生每个阈值的使能信号，测量累积时间每个使能信号的持续时间，根据累积持续时间和阈值进行幅度持续时间分布，根据幅度持续时间分布计算多个参数，并以多个预定标准分析参数以确定缺陷磁头。因此，本发明还公开了一种用于测量磁头噪声的系统。

5. 发明授权

US08830613B2 Storage media inter-track interference cancellation 有权
标题翻译：存储介质轨道间干扰消除
公开(公告)号：US08830613B2
公开(公告)日：2014-09-09
申请号：US13591980
申请日：2012-08-22
申请人： Timothy B. Lund , Carl E. Forhan , Timothy W. Swatosh , Erich Franz Haratsch , George Mathew , Ming Jin , Jongseung Park
发明人： Timothy B. Lund , Carl E. Forhan , Timothy W. Swatosh , Erich Franz Haratsch , George Mathew , Ming Jin , Jongseung Park
IPC分类号： G11B5/09
CPC分类号： G11B20/10046 , G11B5/012 , G11B5/09 , G11B19/045 , G11B20/10268 , G11B20/10398 , G11B20/10462 , G11B20/1407 , G11B2020/183 , G11B2220/2516
摘要： Described embodiments provide a method of cancelling inter-track interference (ITI) from one or more sectors read from a desired track of a storage medium. A read channel reads sectors in a desired track of the storage medium. An iterative decoder of the read channel decodes the read sectors, and if the read sectors are incorrectly recovered from the storage medium, selected sectors of a first adjacent track are read. An ITI canceller of the read channel estimates ITI in the read sectors of the desired track corresponding to the selected sectors of the adjacent track and subtracts the estimated ITI of the adjacent track from the data for the sectors of the desired track, providing updated sector data. The ITI cancelled data is replayed to the iterative decoder, which decodes the ITI cancelled data and provides the decoded ITI cancelled data as output data of the read channel.
摘要翻译：所描述的实施例提供了从存储介质的期望轨迹读取的一个或多个扇区消除轨道间干扰（ITI）的方法。读通道读取存储介质的期望轨道中的扇区。读通道的迭代解码器解码读扇区，并且如果从存储介质错误地恢复读扇区，则读取第一相邻轨道的选定扇区。读通道的ITI消除器估计对应于相邻磁道的所选扇区的期望磁道的读扇区中的ITI，并从期望磁道的扇区的数据中减去相邻磁迹的估计ITI，从而提供更新的扇区数据。 ITI取消的数据被重播到迭代解码器，该解码器对ITI取消的数据进行解码，并将解码的ITI取消的数据作为读取通道的输出数据提供。

6. 发明申请

US20130188463A1 Bi-Directional Pattern Dependent Noise Prediction 有权
标题翻译：双向模式依赖噪声预测
公开(公告)号：US20130188463A1
公开(公告)日：2013-07-25
申请号：US13745297
申请日：2013-01-18
申请人： Yibin Ng , Vijayakumar Bhagavatula , Cai Kui
发明人： Yibin Ng , Vijayakumar Bhagavatula , Cai Kui
IPC分类号： G11B20/10
CPC分类号： G11B20/10398 , G11B20/10287 , G11B2220/2516
摘要： A method performed by a disk drive, comprising: receiving a plurality of signal samples over a channel in the disk drive; executing a forward pattern-dependent noise prediction (PDNP) operation on the plurality of the signal samples; generating, based on execution of the forward PDNP operation, a first detection of recorded data bits in the plurality of received signal samples; executing a backward PDNP operation on the plurality of the received signal samples; generating, based on execution of the backward PDNP operation, a second detection of recorded data bits in the plurality of received signal samples; comparing the first detection to the second detection; identifying, based on comparing, one or more erasures in the received plurality of signal samples; and generating one or more sequences of bits that promote correction of the one or more erasures.
摘要翻译：一种由磁盘驱动器执行的方法，包括：通过所述磁盘驱动器中的通道接收多个信号样本; 对所述多个所述信号样本执行正向模式相关噪声预测（PDNP）操作; 基于所述正向PDNP操作的执行，生成所述多个接收信号样本中的记录数据位的第一检测; 对所述多个接收信号样本执行反向PDNP操作; 基于所述后向PDNP操作的执行，生成所述多个接收信号样本中的记录数据位的第二检测; 将第一检测与第二检测进行比较; 基于比较识别所接收的多个信号样本中的一个或多个擦除; 以及生成促进所述一个或多个擦除的校正的一个或多个比特序列。

7. 发明授权

US08451701B2 System and method for suppressing jitter 有权
标题翻译：抑制抖动的系统和方法
公开(公告)号：US08451701B2
公开(公告)日：2013-05-28
申请号：US13007074
申请日：2011-01-14
申请人： Mark Porzilli , Sam Laufer
发明人： Mark Porzilli , Sam Laufer
IPC分类号： G11B20/18
CPC分类号： G11B20/10009 , G11B20/10398 , G11B20/10527 , G11B2020/10546 , G11B2020/10759 , G11B2220/2545
摘要： A system and method for suppressing jitter in a digital data signal in a signal processor system. The digital data signal has spaced apart byte allocation units wherein such spacing is increased such that unallocated bytes can be identified and removed from the digital data signal. The byte allocation units of the digital data signal are suppressed with a digital data signal being outputted from the signal processor system having suppressed byte allocation units to suppress the occurrence of jitter.
摘要翻译：一种用于抑制信号处理器系统中的数字数据信号中的抖动的系统和方法。数字数据信号具有间隔开的字节分配单元，其中这种间隔增加，使得可以从数字数据信号中识别和去除未分配的字节。数字数据信号的字节分配单元由具有抑制字节分配单元的信号处理器系统输出的数字数据信号被抑制以抑制抖动的发生。

8. 发明申请

US20130070362A1 ENERGY-BASED INTER-TRACK INTERFERENCE CANCELLATION 有权
标题翻译：基于能量的互联干扰消除
公开(公告)号：US20130070362A1
公开(公告)日：2013-03-21
申请号：US13591888
申请日：2012-08-22
申请人： George Mathew , Erich Franz Haratsch , Jongseung Park , Timothy B. Lund
发明人： George Mathew , Erich Franz Haratsch , Jongseung Park , Timothy B. Lund
IPC分类号： G11B20/24
CPC分类号： G11B20/24 , G11B5/012 , G11B19/045 , G11B20/10046 , G11B20/10398 , G11B20/1217 , G11B2020/10759 , G11B2020/1232 , G11B2020/1298 , G11B2220/2516
摘要： Described embodiments cancel inter-track interference (ITI) from one or more sectors read from a desired track of a storage medium. A read channel reads one or more sectors in the desired track and generates one or more groups of sample values corresponding to each of the sectors. An ITI canceller estimates an ITI response and an ITI signal for each sample value corresponding to (i) a next adjacent track and (ii) a previous adjacent track. If the estimated ITI response of the previous adjacent track reaches a predetermined threshold, the ITI canceller subtracts the estimated ITI signal corresponding to the previous adjacent track from each associated sample value of the desired track. If the estimated ITI response of the next adjacent track reaches a predetermined threshold, the ITI canceller subtracts the estimated ITI signal corresponding to the next adjacent track from each associated sample value of the desired track.
摘要翻译：所描述的实施例从从存储介质的期望轨道读取的一个或多个扇区中消除轨道间干扰（ITI）。读通道读取所需轨道中的一个或多个扇区，并生成与每个扇区对应的一组或多组样本值。 ITI消除器估计对应于（i）下一个相邻轨道和（ii）先前相邻轨道的每个采样值的ITI响应和ITI信号。如果先前相邻轨道的估计ITI响应达到预定阈值，则ITI消除器从期望轨道的每个相关联采样值中减去对应于先前相邻轨道的估计ITI信号。如果下一相邻轨道的估计ITI响应达到预定阈值，则ITI消除器从期望轨道的每个相关联采样值中减去对应于下一相邻轨道的估计ITI信号。

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. 发明授权

US08233228B2 DLC-head offset compensation while writing 有权
标题翻译：写入时DLC头偏移补偿
公开(公告)号：US08233228B2
公开(公告)日：2012-07-31
申请号：US12861072
申请日：2010-08-23
申请人： Jeffrey Grundvig , Richard Rauschmayer
发明人： Jeffrey Grundvig , Richard Rauschmayer
IPC分类号： G11B5/09
CPC分类号： G11B5/012 , B82Y10/00 , G11B5/746 , G11B20/10009 , G11B20/10222 , G11B20/10398 , G11B20/14 , G11B2220/2516
摘要： In described embodiments, effects of frequency and phase error introduced at the outer diameter or inner diameter of the disk when a read head is used to maintain timing lock while the write head is used to write new data might be eliminated with a simple compensation circuit. Compensation circuits, modules or methods receive as input information i) write head radial position (e.g., from a wedge number that indicates the circumferential position of the heads), and ii) read head and write head relative physical offset. The timing error is measured by the system and might be automatically adjusted by the appropriate amount in order to reduce or to eliminate the differential head error when a write event (as opposed to a read event) is activated.
摘要翻译：在所描述的实施例中，使用简单的补偿电路可以消除在写入头用于写入新数据时使用读取头来保持定时锁定时在盘的外径或内径处引入的频率和相位误差的影响。补偿电路，模块或方法作为输入信息接收i）写头径向位置（例如，从指示磁头的圆周位置的楔形数），以及ii）读头和写头相对物理偏移。定时误差由系统测量，并且可以自动调整适当的量，以减少或消除写入事件（与读取事件相反）时的差动头错误。

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