公开(公告)号：US06404570B1

公开(公告)日：2002-06-11

申请号：US09432826

申请日：1999-11-02

申请人： Michael McNeil ,  Andrew W. Davis ,  Larry Koudele

发明人： Michael McNeil ,  Andrew W. Davis ,  Larry Koudele

IPC分类号： G11B2736

CPC分类号： G11B20/10481 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/182 ,  G11B27/36

摘要： Adaptive channel optimization in a disk drive is achieved by selecting a track of the recording medium and then writing a first data pattern to opposite sides of the selected track. The first data pattern is written a certain percentage off-track in relation to the centerline of the selected track. A second data pattern is then written directly on the selected data track and the off-track margin is determined as a function of how far the recording head can be positioned away from the center of the selected track during reading of the second data pattern while meeting a specified error rate. The off-track margin test is repeated iteratively using a combination of channel variable settings in order to find a set of variable settings which provides an optimal performance criterion for the drive.

摘要翻译： 磁盘驱动器中的自适应信道优化通过选择记录介质的轨道然后将第一数据模式写入所选轨道的相对侧来实现。 相对于所选轨道的中心线，第一数据模式被写入一定百分比偏离轨迹。 然后将第二数据图形直接写入所选择的数据轨道，并且偏离磁道余量被确定为在读取第二数据模式期间记录头可以远离所选轨道的中心距离的函数，同时会议 指定的错误率。 使用通道变量设置的组合迭代地重复偏离轨道余量测试，以便找到为驱动器提供最佳性能标准的可变设置集合。

公开(公告)号：US20020023248A1

公开(公告)日：2002-02-21

申请号：US09764385

申请日：2001-01-19

申请人： FUJITSU LIMITED

发明人： Tomohiro Suzuki ,  Kaneyasu Shimoda

IPC分类号： G11C029/00

CPC分类号： G11B20/182 ,  G11B20/10046 ,  G11B20/10296

摘要： In a medium defect detection method of the invention, a data storage apparatus selectively operable for one of a normal data reading and a medium defect detection is provided, the data storage apparatus providing an ability to correct an error in readout information during the normal data reading. A sequence of data frames is written to a storage medium. The data frame sequence is read from the medium by producing a readout signal. It is determined whether an error occurs in the readout signal. The writing, reading and determining steps are performed during the medium defect detection by inhibiting the error correction ability of the data storage apparatus. In a data storage apparatus of the invention, a read/write unit writes a sequence of data frames to the medium and reads the sequence of data frames from the medium by producing a readout signal. A detector, selectively operable for one of a normal data reading and a medium defect detection, the detector performing a maximum likelihood sequence detection of the readout signal, providing an ability to correct an error in the readout signal. The detector performs an error detection of the readout signal. A control unit controls the detector to perform selected one of the sequence detection and the error detection, wherein, when the error detection is selected, the control unit reduces the error correction ability of the sequence detection.

摘要翻译： 在本发明的中等缺陷检测方法中，提供了可选择性地操作用于正常数据读取和中间缺陷检测之一的数据存储装置，该数据存储装置提供在正常数据读取期间校正读出信息中的错误的能力 。 将一系列数据帧写入存储介质。 通过产生读出信号从介质读取数据帧序列。 确定读出信号中是否发生错误。 通过抑制数据存储装置的纠错能力，在介质缺陷检测期间执行写入，读取和确定步骤。 在本发明的数据存储装置中，读/写单元将一系列数据帧写入介质，并通过产生读出信号从介质读取数据帧序列。 检测器，可选地可操作用于正常数据读取和中等缺陷检测之一，检测器执行读出信号的最大似然序列检测，提供校正读出信号中的误差的能力。 检测器执行读出信号的错误检测。 控制单元控制检测器执行选择的序列检测和错误检测之一，其中当选择错误检测时，控制单元降低序列检测的纠错能力。

公开(公告)号：US20010033536A1

公开(公告)日：2001-10-25

申请号：US09805438

申请日：2001-03-14

发明人： Jung-wan Ko ,  Hyun-kwon Chung

IPC分类号： G11B007/00

CPC分类号： G11B27/36 ,  G11B20/182 ,  G11B20/1883 ,  G11B2220/20

摘要： A method of verifying defect management area (DMA) information of an optical disc upon initialization with certification, and a test apparatus for performing the same. The method includes generating, as test information, defect management information, which is generated after performing initialization with certification on a test disc, which is obtained by making known physical defects on a blank disc, and verifying the test information using reference test information for initialization with certification to provide the test result. Accordingly, it can be easily verified that a recording and reproducing apparatus properly translates and processes DMA information which is generated after initialization with certification, using a test disc with known physical defects.

摘要翻译： 一种在认证初始化时验证光盘的缺陷管理区域（DMA）信息的方法，以及用于执行该光盘的测试装置。 该方法包括：在通过在空白盘上形成已知的物理缺陷而获得的测试盘上的认证执行初始化之后产生的缺陷管理信息，以及使用用于初始化的参考测试信息来验证测试信息的测试信息 通过认证提供测试结果。 因此，可以容易地证实，使用具有已知物理缺陷的测试盘，记录和再现装置适当地翻译和处理在通过认证的初始化之后生成的DMA信息。

公开(公告)号：US06292913B1

公开(公告)日：2001-09-18

申请号：US09222705

申请日：1998-12-29

申请人： Byung-Kug Son

发明人： Byung-Kug Son

IPC分类号： G11C2900

CPC分类号： G11B20/10296 ,  G11B20/182

摘要： There is provided a method of detecting defects in a magnetic disk memory device. In the defect detecting method, a scrambling function is disabled, and a defect is detected by performing a write/read test on a test data pattern. The test data pattern is written/read in a high-frequency pattern.

摘要翻译： 提供了一种检测磁盘存储装置中的缺陷的方法。 在缺陷检测方法中，禁止加扰功能，并且通过对测试数据模式执行写入/读取测试来检测缺陷。 以高频模式写入/读取测试数据模式。

公开(公告)号：US06278784B1

公开(公告)日：2001-08-21

申请号：US09216635

申请日：1998-12-20

申请人： Peter Gerard Ledermann

发明人： Peter Gerard Ledermann

IPC分类号： H04R2900

CPC分类号： H04S1/007 ,  G11B19/04 ,  G11B20/182 ,  G11B27/36 ,  G11B2220/213 ,  G11B2220/2545 ,  G11B2220/2562

摘要： Apparatus and method for automatically and non-invasively detecting and recording random and/or intermittent errors made during play by digital disc players without supervision, without need for invasive player component testing or disassembly, and without need for analyzing complex waveforms, or use of high level processors. Intermittent errors are found in an actual playback audio signal derived from the output of a digital disc player. A test digital disc prerecorded with a test tone comprising an expected audio signal is played, while an analyzer reads the actual playback audio signal produced, and detects deviations of the actual playback audio signal from the expected audio signal. To detect deviations of the actual playback audio signal from the expected audio signal, the analyzer can comprise an amplitude detection circuit, a phase detection circuit, and a noise detention circuit, each optionally generating character signals that simplify processing. Embodiments allow intermittent error detection for players giving only digital output, through a frame decoder and D-A converter to derive, from the actual playback digital signal, the actual playback audio signal needed. Low required processing power, and the separation and detection of noise are enhanced or facilitated by use of low frequency test tones.

摘要翻译： 用于在无需监视的情况下自动且非侵入性地检测和记录由数字光盘播放器播放期间产生的随机和/或间歇错误的装置和方法，而不需要进行侵入式播放器部件测试或拆卸，并且不需要分析复杂波形或使用高 在从数字光盘播放器的输出得到的实际重放音频信号中发现间歇性错误。 播放预先记录了包括预期音频信号的测试音的测试数字盘，同时分析器读取所产生的实际重放音频信号，并且检测实际重放音频信号与预期音频信号的偏差。为了检测实际播放的偏差 来自预期音频信号的音频信号，分析器可以包括幅度检测电路，相位检测电路和噪声滞留电路，每个可选地产生简化处理的字符信号。实施例允许仅播放数字输出的播放器的间歇性错误检测，通过 一个帧解码器和DA转换器，用于从实际的重放数字信号中导出所需的实际重放音频信号。所需的处理能力低，并且通过使用低频测试音来增强或促进噪声的分离和检测。

公开(公告)号：US06246641B1

公开(公告)日：2001-06-12

申请号：US09162158

申请日：1998-09-29

申请人： Yasuyuki Miyaoka

发明人： Yasuyuki Miyaoka

IPC分类号： G11B1100

CPC分类号： G11B7/126 ,  G11B11/10515 ,  G11B11/10595 ,  G11B20/182

摘要： Disclosed herein is a magneto-optical recording-reproducing method, wherein a domain wall of a record mark is displaced on a recording medium, thereby conducting the reproduction of information, the method comprising the steps of reproducing the prescribed record signals recorded in the recording medium by plural stages of reproduction power to detect reproduction signals; differentiating the reproduction signals to detect differential signals; and determining the reproduction power on the basis of the amplitude values of the differential signals.

摘要翻译： 这里公开了一种磁光记录再现方法，其中记录标记的畴壁在记录介质上移位，从而进行信息的再现，该方法包括以下步骤：再现记录在记录介质中的规定记录信号 通过多级再现功率来检测再现信号; 区分再现信号以检测差分信号; 以及基于差分信号的振幅值确定再现功率。

公开(公告)号：US6064536A

公开(公告)日：2000-05-16

申请号：US909355

申请日：1997-08-11

申请人： Kan Ebisawa ,  Hiroki Nagakita

发明人： Kan Ebisawa ,  Hiroki Nagakita

IPC分类号： G11B20/10 ,  G11B20/18 ,  G11B5/035 ,  G11B5/09

CPC分类号： G11B20/10481 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10046 ,  G11B20/10296 ,  G11B20/182

摘要： A reproduced signal of a test signal recorded together with data on a recording medium in each unit recording area thereof is equalized in waveform by an adaptive waveform equalizing means while tap coefficients thereof are being varied. The tap coefficients obtained when an equalized signal is as close to an ideally equalized dignal as possible are used as optimum tap coefficients, and the reproduced signals of the data in the unit recording areas are equalized in waveform using the optimum tap coefficients.The data can be equalized in waveform stably, reliably, and quickly by a small-scale circuit. There is provided an apparatus for reproducing data so as to be able to achieve high-density recording.

摘要翻译： 在其单位记录区域中与记录介质上的数据一起记录的测试信号的再现信号在自适应波形均衡装置的波形下被平衡，同时其抽头系数被改变。 将均衡信号尽可能接近理想均衡的信号获得的抽头系数用作最佳抽头系数，并且使用最佳抽头系数在单位记录区域中的数据的再现信号在波形上均衡。 数据可以通过小型电路稳定，可靠，快速地进行波形均衡。 提供了一种用于再现数据以便能够实现高密度记录的装置。

公开(公告)号：US5946153A

公开(公告)日：1999-08-31

申请号：US593989

申请日：1996-01-30

申请人： Bruce D. Emo ,  Brian D. Wilson ,  Nelson Chenkin

发明人： Bruce D. Emo ,  Brian D. Wilson ,  Nelson Chenkin

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/455 ,  G11B5/48 ,  G11B19/04 ,  G11B20/12 ,  G11B20/18 ,  G11B33/10

CPC分类号： G11B5/4886 ,  G11B19/04 ,  G11B20/1258 ,  G11B20/1816 ,  G11B20/182 ,  G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/455 ,  G11B2005/001 ,  G11B33/10

摘要： A magnetic recording system utilizing a magnetic recording disk. In some embodiments, one magnetic surface is utilized with an associated read/write transducer supported by a load beam. In other embodiments, the disk has a plurality of magnetic surfaces, each having an associated read/write transducer for reading and writing data in tracks in a plurality of zones and an associated load beam for supporting and positioning the respective read/write transducer at a plurality of locations above the respective surface. In one embodiment, the radial boundaries of the zones and read/write frequency for each zone are defined as a function of the number of available tracks on the recording surface. In another embodiment, the radial boundaries of the zones and read/write frequency for the zones are defined as a function of the read/write performance of the read/write transducer with respect to its associated magnetic surface. In a further embodiment, a read/write performance of the read/write transducer is determined, the recording performance of the magnetic surface is determined and the radial boundaries for each zones and the read/write frequencies for each zone are established as a function of the performances.

摘要翻译： 一种利用磁记录盘的磁记录系统。 在一些实施例中，一个磁性表面与由负载梁支撑的相关读/写换能器一起使用。 在其他实施例中，盘具有多个磁性表面，每个磁性表面具有用于在多个区域中的轨道中读取和写入数据的相关联的读/写换能器以及用于在相应的读/写换能器 在相应表面上方的多个位置。 在一个实施例中，区域的径向边界和每个区域的读/写频率被定义为记录表面上的可用轨迹的数量的函数。 在另一个实施例中，区域的径向边界和区域的读/写频率被定义为读/写换能器相对于其相关磁表面的读/写性能的函数。 在另一实施例中，确定读/写换能器的读/写性能，确定磁表面的记录性能，并且确定每个区域的径向边界和每个区域的读/写频率作为 表演。

公开(公告)号：US5914827A

公开(公告)日：1999-06-22

申请号：US608296

申请日：1996-02-28

申请人： Richard Yamasaki ,  David R. Gruetter

发明人： Richard Yamasaki ,  David R. Gruetter

IPC分类号： G11B5/09 ,  G11B5/012 ,  G11B5/02 ,  G11B20/18 ,  G11B20/24

CPC分类号： G11B20/182 ,  G11B5/012

摘要： A method and apparatus for implementing a noise generator in an integrated circuit read channel to optimize the performance of the signal channel. In the preferred embodiment resistors are used to generate noise. The noise source is buffered and the noise signal passes through a pre-amplifier stage. A differential current digital-to-analog converter controlled multiplier cell controls the amplitude of the noise signal. A switch connects the noise signal to a differential current output buffer, which is coupled to a signal channel.

摘要翻译： 一种用于在集成电路读通道中实现噪声发生器以优化信号通道的性能的方法和装置。 在优选实施例中，电阻器用于产生噪声。 噪声源被缓冲，噪声信号通过前置放大器级。 差分电流数模转换器控制的乘法器单元控制噪声信号的幅度。 开关将噪声信号连接到差分电流输出缓冲器，该缓冲器耦合到信号通道。

公开(公告)号：US5790491A

公开(公告)日：1998-08-04

申请号：US590703

申请日：1996-04-08

申请人： Glen Alan Jaquette ,  Arturo Avila Mojica

发明人： Glen Alan Jaquette ,  Arturo Avila Mojica

IPC分类号： G11B7/0045 ,  G11B7/007 ,  G11B7/125 ,  G11B20/10 ,  G11B20/12 ,  G11B20/18 ,  G11B27/36 ,  G11B7/00

CPC分类号： G11B7/126 ,  G11B20/182 ,  G11B27/36 ,  G11B7/0045 ,  G11B7/00745 ,  G11B20/10009 ,  G11B20/1217 ,  G11B7/00451

摘要： A write-once read-many (WORM) optical disk recorder automatically calibrates its laser to emit a laser beam of a desired power level. While writing data to the WORM disk, a laser test signal is written to a laser checking area termed Automatic Laser Power Correction (ALPC) field. If the emitted laser test signal has a power level outside an acceptable power level window, then inappropriate laser power is indicated. Then, in an error recovery procedure (ERP) the laser power is calibrated in the data sector to be written to using short spaced-apart laser test signals. After successful calibration, data are written to the sector. The test signals appear as burst errors that can be corrected by a suitable error correction code. If such calibration is not successful then a write calibrate sector, WCS, is created and used for an extensive automatic calibration. In the WCS both laser power level is calibrated. The calibration result information is written to WCS for later use. A WCS may be created by command from a controller or attaching host for calibrating the laser and its control circuits in a WORM disk device. The WCS can also be written as a part of an ERP initiated by an unsuccessful write operation in one or more target sectors. Such initiation is based upon a determination that an inappropriate write power level may have been used in the attempted data writing.

摘要翻译： 一次写入许可（WORM）光盘记录器自动校准其激光以发射具有所需功率电平的激光束。 在将数据写入WORM磁盘时，将激光测试信号写入激光检查区域，称为自动激光功率校正（ALPC）字段。 如果发射的激光测试信号具有超出可接受功率电平窗口的功率电平，则指示不适当的激光功率。 然后，在错误恢复过程（ERP）中，激光功率在数据扇区中被校准，以被写入使用短间隔激光测试信号。 校准成功后，将数据写入扇区。 测试信号显示为可以通过合适的纠错码校正的突发错误。 如果这样的校准不成功，则写入校准扇区WCS被创建并用于广泛的自动校准。 在WCS中，激光功率电平被校准。 校准结果信息写入WCS供以后使用。 WCS可以通过来自控制器或附加主机的命令来创建，以在WORM磁盘设备中校准激光器及其控制电路。 WCS也可以作为由一个或多个目标扇区中不成功的写入操作启动的ERP的一部分。 这种启动是基于在尝试的数据写入中可能已经使用不适当的写入功率电平的确定。