专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US5680383A Data-transition threshold following in optical recording 失效
标题翻译：光学记录中的数据转换阈值
公开(公告)号：US5680383A
公开(公告)日：1997-10-21
申请号：US726307
申请日：1996-10-02
申请人： Alan Robert Clark , Robert Allen Hutchins , Glen Alan Jaquette , Ara Sarkis Patapoutian , Pantas Sutardja
发明人： Alan Robert Clark , Robert Allen Hutchins , Glen Alan Jaquette , Ara Sarkis Patapoutian , Pantas Sutardja
IPC分类号： G11B7/0037 , G11B20/10 , G11B7/00
CPC分类号： G11B20/10203 , G11B20/10037 , G11B7/00375
摘要： In a pulse width modulated read signal channel for an optical disk drive, a data-transition threshold is maintained for data detection by a threshold tracking circuit that estimates the amplitude centerline data-transition threshold from the most recent maximum and minimum values of the read signal waveform. To improve the accuracy of the response of the centerline estimator, the threshold is increased or decreased based on the phase error at each read signal transition through the data-transition threshold. In addition, defects in the optical recording media are detected, and a defect present signal is used to inhibit the transition phase error input to the centerline estimator. This prevents the estimator from moving the threshold to an incorrect stable level. In addition, the defect present signal boosts the error feedback in the centerline estimator. The estimator then more quickly follows the read signal waveform. As a result, the estimator reacquires the centerline of the waveform after the read head moves past the defect without retriggering the defect detection circuit.
摘要翻译：在用于光盘驱动器的脉冲宽度调制读信号通道中，保持数据转换阈值，以便阈值跟踪电路进行数据检测，该阈值跟踪电路根据读取信号的最新最大值和最小值估计幅度中心线数据转换阈值波形为了提高中心线估计器的响应精度，基于每个读取信号通过数据转换阈值转换的相位误差来增大或减小阈值。此外，检测光记录介质中的缺陷，并且使用缺陷存在信号来抑制输入到中心线估计器的过渡相位误差。这样可以防止估计器将阈值移动到不正确的稳定水平。此外，缺陷存在信号提高了中心线估计器中的误差反馈。然后，估计器更快地跟随读信号波形。因此，在读取头移动超过缺陷而不重新触发缺陷检测电路之后，估计器重新获取波形的中心线。

2. 发明授权

US5978335A Integrated calibration apparatus for a multi-mode information storage system 失效
标题翻译：用于多模式信息存储系统的集成校准装置
公开(公告)号：US5978335A
公开(公告)日：1999-11-02
申请号：US672862
申请日：1996-06-28
申请人： Alan Robert Clark , Robert Allen Hutchins , Glen Alan Jaquette
发明人： Alan Robert Clark , Robert Allen Hutchins , Glen Alan Jaquette
IPC分类号： G01M11/00 , G11B7/00 , G11B7/0037 , G11B7/004 , G11B7/0045 , G11B7/005 , G11B7/09 , G11B7/125 , G11B11/10 , G11B11/105 , G11B20/10 , G11B20/18 , G11B27/36
CPC分类号： G11B7/126 , G11B11/10595 , G11B20/1879 , G11B27/36 , G11B7/0045 , G11B7/0037
摘要： An integrated calibration apparatus operates in multiple calibration modes of a multi-mode information storage system such as an optical disk drive to calibrate the drive in the multiple write modes. An event processing and measurement circuit is configurable in multiple configurations that each correspond to a different calibration measurement. Each configuration concurrently measures one or more parameters of readback data written to an optical disk by the optical disk drive operating in a particular write mode. A qualification circuit selects valid measurements for two different parameters or for two different qualification of the same parameter. A summation circuit sums valid measurements of each parameter measured and counts the number of measurements summed for each parameter. The calibration apparatus calculates average values for the measured parameters from the sums and counts, and then calibrates the multi-mode optical disk drive for its current write mode based on the average values.
摘要翻译：集成校准装置在诸如光盘驱动器的多模式信息存储系统的多个校准模式中操作，以校准多个写入模式中的驱动器。事件处理和测量电路可配置为多个配置，每个配置对应于不同的校准测量。每个配置同时测量由特定写入模式操作的光盘驱动器写入光盘的回读数据的一个或多个参数。鉴定电路为两个不同的参数或相同参数的两个不同资格选择有效的测量。求和电路对所测量的每个参数的有效测量进行求和，并对每个参数求和的测量次数进行计数。校准装置根据总和和计数计算测量参数的平均值，然后基于平均值校准多模光盘驱动器的当前写入模式。

3. 发明授权

US5825744A Configurable read detection channel and method for decoding data stored within a data storage medium 失效
标题翻译：用于对存储在数据存储介质中的数据进行解码的可配置读取检测通道和方法
公开(公告)号：US5825744A
公开(公告)日：1998-10-20
申请号：US647490
申请日：1996-05-13
申请人： Robert Allen Hutchins , Glen Alan Jaquette , Alan Robert Clark
发明人： Robert Allen Hutchins , Glen Alan Jaquette , Alan Robert Clark
IPC分类号： G11B20/14 , G11B7/005 , G11B19/12 , G11B20/18 , G11B7/00
CPC分类号： G11B19/12 , G11B7/005
摘要： In a first embodiment, a read detection channel includes a tracking threshold circuit for generating a variable threshold signal and a detection circuit, which is configurable in a number of diverse configurations that each correspond to one of the multiple diverse data formats. In addition, the first embodiment of the read detection channel includes a configuration circuit that automatically selects one of the configurations of the data detection circuit in response to a detection of a format of the input data stream. The first embodiment of the read detection channel permits data bits encoded in multiple diverse data formats to be decoded utilizing a single configurable read detection channel. In a second embodiment, the configurable read detection channel includes a tracking threshold circuit that can be configured to generate a threshold output signal in response to an input signal or in response to the input signal and a phase error signal. The second embodiment of the read detection channel further includes a detection circuit, which indicates data bits detected within the input signal in response to the threshold output signal, and at least one phase-locked loop coupled to the detection circuit, which places each detected data bit within one of a plurality of bit cells within an output data stream. The phase-locked loop also generates a phase error signal that can be selectively coupled to the tracking threshold circuit.
摘要翻译：在第一实施例中，读取检测通道包括用于产生可变阈值信号的跟踪阈值电路和检测电路，其可配置为多个不同配置，每个配置各自对应于多种不同数据格式之一。此外，读取检测通道的第一实施例包括配置电路，其响应于检测到输入数据流的格式而自动选择数据检测电路的配置之一。读取检测通道的第一实施例允许使用单个可配置读取检测通道对以多种不同数据格式编码的数据位进行解码。在第二实施例中，可配置读检测通道包括跟踪阈值电路，其可被配置为响应于输入信号或响应于输入信号和相位误差信号而产生阈值输出信号。读取检测通道的第二实施例还包括检测电路，其响应于阈值输出信号指示在输入信号内检测到的数据位，以及耦合到检测电路的至少一个锁相环，其将每个检测到的数据位在输出数据流内的多个位单元之一内。锁相环还产生可以选择性地耦合到跟踪阈值电路的相位误差信号。

4. 发明申请

US20080137722A1 Oversampled Channel Response Identification 失效
标题翻译：过采样通道响应识别
公开(公告)号：US20080137722A1
公开(公告)日：2008-06-12
申请号：US11558949
申请日：2006-11-13
申请人： Giovanni Cherubini , Evangelos S. Eleftheriou , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
发明人： Giovanni Cherubini , Evangelos S. Eleftheriou , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
IPC分类号： H04L27/01 , H04L27/00
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10212 , H04B1/7085 , H04J2013/0037 , H04L25/0212 , H04L25/03038
摘要： Methods, apparatus and computer programs are provided for multiplication-free identification of the impulse response of an oversampled data channel. An input comprising a pseudo-random binary sequence of L symbols is supplied to the channel at a symbol rate of 1/T. A channel output is produced by sampling a channel output signal corresponding to the input with a sampling interval TS=(q/p)T, where q and p are relative prime integers with q
摘要翻译：提供了方法，装置和计算机程序，用于对过采样数据信道的脉冲响应进行无乘法识别。将包含L个符号的伪随机二进制序列的输入以符号率1 / T提供给信道。通过以采样间隔T S（q / p）T对与输入相对应的信道输出信号进行采样来产生信道输出，其中q和p是具有q 个符号来产生抽取的二进制序列。每个多相序列与抽取的二进制序列相关，两个可能的二进制值相等，相关的符号相反。累积相关结果以产生该多相序列的相关输出序列。然后相关输出序列的采样以相应多相序列的相位顺序交织，以产生信道的脉冲响应。

5. 发明授权

US07271971B2 Dynamically adapting a magnetic tape read channel equalizer 失效
标题翻译：动态调整磁带读通道均衡器
公开(公告)号：US07271971B2
公开(公告)日：2007-09-18
申请号：US11003283
申请日：2004-12-03
申请人： Robert Allen Hutchins , Glen Alan Jaquette , Evangelos S. Eleftheriou , Sedat Oelcer
发明人： Robert Allen Hutchins , Glen Alan Jaquette , Evangelos S. Eleftheriou , Sedat Oelcer
IPC分类号： G11B5/035
CPC分类号： G11B20/10 , G11B5/02
摘要： A read channel equalizer of a magnetic tape drive which equalizes digitally sampled magnetic signals detected by a read head is dynamically adapted. A detector of equalizer dynamic adaptation logic compares equalizer output signals to desired values that are based on the decoding scheme (such as +2, 0 and −2 for PR4) to sense equalizer output signals that are offset from at least one desired value, and signals the fact of each offset and its polarity as amplitude independent error signals. The signaled sensed amplitude independent error signals are fed back to adjustable taps of the equalizer. The simplified error signals thus avoid complex calculations of waveform errors, such as least mean square calculations. The error signals may be weighted and may be adjusted to align synchronously provided error signals with asynchronous taps of the equalizer.
摘要翻译：磁头驱动器的读取通道均衡器，其均衡由读取头检测到的数字采样磁信号。均衡器动态适配逻辑的检测器将均衡器输出信号与基于解码方案（例如PR4的+2,0和-2）的期望值进行比较，以感测与至少一个期望值偏移的均衡器输出信号，以及将每个偏移及其极性的事实表示为与振幅无关的误差信号。信号感知的与振幅无关的误差信号反馈到均衡器的可调节抽头。因此，简化的误差信号避免了波形误差的复杂计算，例如最小均方根计算。误差信号可以被加权并且可以被调整以使同步提供的误差信号与均衡器的异步抽头对齐。

6. 发明授权

US07106533B2 Apparatus, system, and method for mitigating signal asymmetry 失效
标题翻译：用于减轻信号不对称的装置，系统和方法
公开(公告)号：US07106533B2
公开(公告)日：2006-09-12
申请号：US10966531
申请日：2004-10-15
申请人： Evangelos S. Eleftheriou , Ernest Stewart Gale , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Ernest Stewart Gale , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
IPC分类号： G11B20/10
CPC分类号： H03M1/1042 , G11B20/10 , G11B2220/90
摘要： An apparatus, system, and method are disclosed for mitigating signal asymmetry. An analog to digital converter samples an analog signal from a read head and converts the sample to a digital input signal. The digital input signal addresses a look-up module, and the look-up module outputs a modified digital signal. The modified digital signal value is a specified function of the digital input signal value, wherein the specified function is configured to mitigate the asymmetry of the digital input signal. The modified digital signal value may be periodically recalculated to adjust for read head wear.
摘要翻译：公开了一种减轻信号不对称性的装置，系统和方法。模数转换器从读取头采样模拟信号，并将样本转换为数字输入信号。数字输入信号寻址查找模块，查找模块输出修改后的数字信号。修改的数字信号值是数字输入信号值的指定函数，其中指定的功能被配置为减轻数字输入信号的不对称性。可以周期性地重新计算修改的数字信号值以调整读头磨损。

7. 发明授权

US5930065A Timing based servo longitudinal addressing 失效
标题翻译：基于定时的伺服纵向寻址
公开(公告)号：US5930065A
公开(公告)日：1999-07-27
申请号：US859830
申请日：1997-05-16
申请人： Thomas Robert Albrecht , Robert Carl Barrett , James Howard Eaton , Robert Allen Hutchins , Glen Alan Jaquette
发明人： Thomas Robert Albrecht , Robert Carl Barrett , James Howard Eaton , Robert Allen Hutchins , Glen Alan Jaquette
IPC分类号： G11B5/584 , G11B20/10 , G11B21/10 , G11B27/10 , G11B27/30 , G11B27/19
CPC分类号： G11B21/10 , G11B27/107 , G11B27/3027 , G11B5/584 , G11B20/10009 , G11B2220/90
摘要： Disclosed is a magnetic tape media having addressing data information superimposed on prerecorded track following servo information. The servo information is recorded in magnetic flux transition patterns defining at least one longitudinal servo track. A servo burst pattern of at least two repeated pairs of non-parallel magnetic flux transitions is provided, at least one of which transitions is slanted or otherwise continuously longitudinally variable across the width of the servo track. At least two transitions of the repeated pairs are shifted longitudinally with respect to other of the transitions, the shifted transitions comprising the superimposed addressing data information. Also disclosed is a magnetic tape media having prerecorded combined servo and data information recorded in repeated pairs of magnetic flux dual transitions, at least one of the repeated pairs of dual transitions having a different width with respect to other of the transitions, the different width transitions comprising data information.
摘要翻译：公开了一种磁带介质，其具有叠加在伺服信息之后的预先记录的轨道上的寻址数据信息。伺服信息被记录在限定至少一个纵向伺服轨道的磁通转变图案中。提供了至少两个重复的非平行磁通转换对的伺服突发图案，其中至少一个转变在伺服轨迹的宽度上倾斜或以其它方式连续纵向变化。重复对的至少两个转换相对于其他转换被纵向移动，移位的转换包括叠加的寻址数据信息。还公开了一种磁带介质，其具有以重复的磁通双重转换对记录的预先记录的组合伺服和数据信息，重复的双重转换对中的至少一个相对于其他转换具有不同的宽度，不同的宽度转变包括数据信息。

8. 发明授权

US07639444B2 Real-time channel adaptation 失效
标题翻译：实时通道调整
公开(公告)号：US07639444B2
公开(公告)日：2009-12-29
申请号：US10737563
申请日：2003-12-15
申请人： Robert Allen Hutchins , Glen Alan Jaquette , David Berman , Constantin Michael Melas
发明人： Robert Allen Hutchins , Glen Alan Jaquette , David Berman , Constantin Michael Melas
IPC分类号： G11B5/09 , G11B5/035 , H04L27/10 , H04L27/18 , G11C29/00
CPC分类号： G11B20/10009
摘要： Disclosed is a technique for updating a read-detect channel. A signal is processed in a read-detect channel that has one or more programmable registers. While signals continue to be processed by the read-detect channel, it is determined with a channel auxiliary processor whether to dynamically replace values of the one or more programmable registers. When it is determined that values of the one or more programmable registers are to be replaced, a channel auxiliary processor determines values for the one or more programmable registers and replaces existing values for the one or more programmable registers with the determined values.
摘要翻译：公开了一种更新读取检测通道的技术。在具有一个或多个可编程寄存器的读取检测通道中处理信号。当信号继续由读取检测通道处理时，用信道辅助处理器确定是否动态地替换一个或多个可编程寄存器的值。当确定要替换一个或多个可编程寄存器的值时，信道辅助处理器确定一个或多个可编程寄存器的值，并用所确定的值替换一个或多个可编程寄存器的现有值。

9. 发明申请

US20080253012A1 MAGNETIC TAPE READ CHANNEL SIGNAL VALUES DEVELOPED EMPLOYING INTERMEDIATE BITS OF THE PATH MEMORY OF A PRML VITERBI DETECTOR 失效
标题翻译：磁带读取通道信号值开发使用PRML VITERBI检测器的路径存储器的中间位
公开(公告)号：US20080253012A1
公开(公告)日：2008-10-16
申请号：US12143385
申请日：2008-06-20
申请人： EVANGELOS S. ELEFTHERIOU , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
发明人： EVANGELOS S. ELEFTHERIOU , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10074 , G11B20/10296 , G11B2220/90
摘要： Magnetic tape read channel signal values are developed employing intermediate bits of the path memory of a PRML Viterbi detector. Identification logic identifies a most likely path memory state of the PRML Viterbi detector from the path metrics of the PRML Viterbi detector. An intermediate bit sequence of the identified most likely path memory state is obtained, the intermediate bit sequence extending from an initiation point of the path memory which is intermediate the output and the input of the PRML Viterbi detector. A sample value is determined which corresponds to the obtained intermediate bit sequence.
摘要翻译：使用PRML维特比检测器的路径存储器的中间位来开发磁带读取通道信号值。识别逻辑根据PRML维特比检测器的路径度量来识别PRML维特比检测器的最可能的路径存储状态。获得所识别的最可能的路径存储器状态的中间比特序列，从位于PRML维特比检测器的输出和输入之间的路径存储器的起始点延伸的中间比特序列。确定对应于获得的中间位序列的采样值。

10. 发明授权

US07359135B2 Dynamically adapting a magnetic tape read channel equalizer 失效
标题翻译：动态调整磁带读通道均衡器
公开(公告)号：US07359135B2
公开(公告)日：2008-04-15
申请号：US11733934
申请日：2007-04-11
申请人： Robert Allen Hutchins , Glen Alan Jaquette , Evangelos S. Eleftheriou , Sedat Oelcer
发明人： Robert Allen Hutchins , Glen Alan Jaquette , Evangelos S. Eleftheriou , Sedat Oelcer
IPC分类号： G11B5/35
CPC分类号： G11B20/10 , G11B5/02
摘要： A read channel equalizer of a magnetic tape drive which equalizes digitally sampled magnetic signals detected by a read head is dynamically adapted. A detector of equalizer dynamic adaptation logic compares equalizer output signals to desired values that are based on the decoding scheme (such as +2, 0 and −2 for PR4) to sense equalizer output signals that are offset from at least one desired value, and signals the fact of each offset and it polarity as amplitude independent error signals. The signaled sensed amplitude independent error signals are fed back to adjustable taps of the equalizer. The simplified error signals thus avoid complex calculations of waveform errors, such as least mean square calculations. The error signals may be weighted and may be adjusted to align synchronously provided error signals with asynchronous taps of the equalizer.
摘要翻译：磁头驱动器的读取通道均衡器，其均衡由读取头检测到的数字采样磁信号。均衡器动态适配逻辑的检测器将均衡器输出信号与基于解码方案（例如PR4的+2,0和-2）的期望值进行比较，以感测与至少一个期望值偏移的均衡器输出信号，以及将每个偏移的事实表示为与振幅无关的误差信号。信号感知的与振幅无关的误差信号反馈到均衡器的可调节抽头。因此，简化的误差信号避免了波形误差的复杂计算，例如最小均方根计算。误差信号可以被加权并且可以被调整以使同步提供的误差信号与均衡器的异步抽头对齐。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式