公开(公告)号：US07889447B2

公开(公告)日：2011-02-15

申请号：US12353564

申请日：2009-01-14

申请人： Juil Lee ,  Michael Ting ,  Mark David Bedillion

发明人： Juil Lee ,  Michael Ting ,  Mark David Bedillion

IPC分类号： G11B20/06

CPC分类号： G11B5/6005

摘要： A method includes: producing a readback signal using a recording head positioned adjacent to a recording medium, amplitude demodulating the readback signal to produce an amplitude demodulated signal, frequency demodulating the readback signal to produce a frequency demodulated signal, and using the amplitude demodulated signal and the frequency demodulated signal to determine contact of the recording head with the recording medium. An apparatus that can be used to implement the method is also provided.

摘要翻译： 一种方法包括：使用与记录介质相邻的记录头产生回读信号，对回读信号进行幅度解调以产生幅度解调信号，对回读信号进行频率解调以产生频率解调信号，并使用幅度解调信号和 频率解调信号以确定记录头与记录介质的接触。 还提供了可用于实现该方法的装置。

公开(公告)号：US07760459B1

公开(公告)日：2010-07-20

申请号：US11953794

申请日：2007-12-10

申请人： Ke Han ,  Pantas Sutardja ,  Rui Cao

发明人： Ke Han ,  Pantas Sutardja ,  Rui Cao

IPC分类号： G11B21/02 ,  G11B5/596 ,  G11B20/06

CPC分类号： G11B5/59644 ,  G11B20/14

摘要： Systems and techniques to select a framing and determine a waveform polarity of an encoded repeating pattern include, in at least one aspect, operations including: decoding an encoded repeating pattern using multiple framings of signal samples of a signal from a machine-readable medium; correlating the signal samples that indicate pattern transitions, for the multiple framings, with valid pattern transitions as defined by the encoding; accumulating the transition pattern correlations for the multiple framings; selecting one of the multiple framings as a correct framing for decoding based on the accumulated correlations; and determining a waveform polarity for the signal based on the repeating pattern and the selected correct framing.

摘要翻译： 选择成帧并确定编码的重复图案的波形极性的系统和技术在至少一个方面包括以下操作：包括：使用来自机器可读介质的信号的信号样本的多个成帧来对编码的重复图案进行解码; 对于多个帧，指示模式转换的信号样本与由编码定义的有效模式转换相关; 累积多个帧的过渡模式相关性; 基于累积的相关性，将多个帧中的一个选择为正确的解码帧; 以及基于所述重复图案和所选择的正确框架确定所述信号的波形极性。

公开(公告)号：US07580216B1

公开(公告)日：2009-08-25

申请号：US11953811

申请日：2007-12-10

申请人： Ke Han ,  Pantas Sutardja ,  Rui Cao

发明人： Ke Han ,  Pantas Sutardja ,  Rui Cao

IPC分类号： G11B21/02 ,  G11B5/596 ,  G11B20/06

CPC分类号： G11B5/59644 ,  G11B20/14

摘要： Systems and techniques to write servo patterns on machine-readable media. In general, in one implementation, the technique includes: obtaining timing information from a spiral servo reference track on a machine-readable medium to determine head position, and generating a servo track with servo information based on the determined head position. Obtaining the timing information can involve determining a peak position of a diamond-shaped waveform and identifying occurrences of a timing-reference symbol in the spiral servo reference track. Moreover, identifying occurrences of the timing-reference symbol can involve decoding an encoded repeating pattern using multiple framings, correlating signal samples that indicate pattern transitions with valid pattern transitions as defined by the encoding, accumulating the transition pattern correlations for the multiple framings, selecting one of the multiple framings as a correct framing, and determining a waveform polarity for the signal.

摘要翻译： 在机器可读介质上写入伺服模式的系统和技术。 通常，在一个实现中，该技术包括：从机器可读介质上的螺旋伺服参考轨道获取定时信息以确定磁头位置，以及基于确定的磁头位置产生具有伺服信息的伺服磁道。 获取定时信息可以包括确定菱形波形的峰值位置并且识别螺旋伺服参考轨道中的定时参考符号的出现。 此外，识别定时参考符号的出现可以包括使用多个成帧对编码的重复模式进行解码，将指示模式转换的信号样本与由编码定义的有效模式转换相关联，累积多个帧的转换模式相关性，选择一个 的多个帧作为正确的帧，并且确定该信号的波形极性。

公开(公告)号：US20050248867A1

公开(公告)日：2005-11-10

申请号：US11123094

申请日：2005-05-06

申请人： Ho-joong Choi

发明人： Ho-joong Choi

IPC分类号： G11B20/06 ,  G11B20/10

CPC分类号： G11B20/10009

摘要： A method of determining frequency bands of a data storage system and an apparatus using the same are provided. More particularly, a method of determining frequencies used for reading and writing data from and to a disk drive while avoiding frequencies that have adverse effects on a system and a disk drive using the same are provided. A method of determining read and write frequencies of the data storage system may include determining frequencies that have adverse effects on functions of the data storage system; selecting frequencies to be used when reading and writing data to and from a disk drive while avoiding the frequencies determined to have adverse effects on the functions of the data storage system.

摘要翻译： 提供一种确定数据存储系统的频带的方法和使用该频带的装置。 更具体地，提供了一种确定用于从磁盘驱动器读取和写入数据到磁盘驱动器的频率的方法，同时避免对系统和使用其的磁盘驱动器具有不利影响的频率。 确定数据存储系统的读和写频率的方法可以包括确定对数据存储系统的功能具有不利影响的频率; 选择在将数据读取和写入磁盘驱动器时使用的频率，同时避免被确定为对数据存储系统的功能产生不利影响的频率。

公开(公告)号：US06943970B2

公开(公告)日：2005-09-13

申请号：US10044403

申请日：2002-01-11

申请人： Kazuhiko Takaishi ,  Takeyori Hara ,  Eiji Okamura

发明人： Kazuhiko Takaishi ,  Takeyori Hara ,  Eiji Okamura

IPC分类号： G11B5/55 ,  G11B5/596 ,  G11B21/10 ,  G11B20/06 ,  G11B20/08

CPC分类号： G11B5/5526 ,  G11B5/59622 ,  G11B21/106

摘要： Position information PosN and PosQ are compared and position information Pos1 and Pos2 in which influences of an error of a position sensitivity gain appear oppositely are calculated. Subsequently, a weight gain G1=M and a weight gain G2=(1−M) are obtained from the position information Pos1. A multiplication value obtained by multiplying the third position information Pos1 by the weight gain G1 and a multiplication value obtained by multiplying the fourth position information Pos2 by the weight gain G2 are added and synthesized, thereby calculating a decoded position.

摘要翻译： 比较位置信息PosN和PosQ，并计算其中位置灵敏度增益的误差的影响相反地出现的位置信息Pos 1和Pos 2。 随后，从位置信息Pos 1获得体重增益G 1 = M和体重增益G 2 =（1-M）。 通过将第三位置信息Pos 1乘以权重增益G 1和通过将第四位置信息Pos 2乘以权重增益G 2而获得的乘法值相乘而获得的乘积值被加法并合成，从而计算解码位置。

公开(公告)号：US06081537A

公开(公告)日：2000-06-27

申请号：US859401

申请日：1997-05-20

申请人： Masayasu Kaneko ,  Tsutomu Mikami

发明人： Masayasu Kaneko ,  Tsutomu Mikami

IPC分类号： H04N9/83 ,  G11B20/00 ,  G11B20/06 ,  H03D3/02 ,  H04N5/60 ,  H04N9/802 ,  H04J1/00 ,  H04B1/10 ,  H04N5/44

CPC分类号： H04N9/802 ,  H03D3/02 ,  H04N5/60 ,  H04N9/83

摘要： A signal trap device and method for trapping a desired FM signal out of a frequency multiplexed signal where a plurality of FM signals are included in a frequency multiplexed form. A replay signal reproduced from a video cassette tape is supplied directly to a subtracter while being fed to a fixed delay circuit and a variable delay circuit to be delayed therein by a predetermined delay time. The delayed signal is supplied also to the subtracter, which then subtracts the delayed signal from the reproduced replay signal and outputs the result of such subtraction therefrom. The delay time of the fixed delay circuit is set to correspond to the center frequency of the carrier of the desired FM signal to be trapped. Meanwhile the delay time of the variable delay circuit is so set as to correspond to the signal obtained by demodulating the desired FM signal. Thus, the desired FM signal can be trapped properly without any harmful influence on the other FM signal.

摘要翻译： 一种用于从多路复用信号中捕获所需FM信号的信号陷波装置和方法，其中以频率复用形式包括多个FM信号。 从盒式录像带再现的再现信号被直接提供给减法器，同时馈送到固定延迟电路和可变延迟电路，以在其中延迟预定的延迟时间。 延迟信号也被提供给减法器，减法器然后从再现的重放信号中减去延迟的信号，并从其中输出这种减法的结果。 固定延迟电路的延迟时间被设置为对应于要被捕获的期望的FM信号的载波的中心频率。 同时，可变延迟电路的延迟时间被设置为对应于通过解调期望的FM信号而获得的信号。 因此，所需的FM信号可以适当地被捕获，而对其他FM信号没有任何有害的影响。

公开(公告)号：US6081493A

公开(公告)日：2000-06-27

申请号：US262501

申请日：1999-03-04

申请人： Yoshiro Joichi

发明人： Yoshiro Joichi

IPC分类号： G11B7/0037 ,  G11B7/007 ,  G11B11/10 ,  G11B11/105 ,  G11B20/02 ,  G11B20/06 ,  G11B20/14 ,  G11B20/18 ,  G11B20/00

CPC分类号： G11B20/1419 ,  G11B20/025 ,  G11B20/06 ,  G11B11/10502 ,  G11B20/1833 ,  G11B7/0037 ,  G11B7/007

摘要： In a demodulator for a digital FM signal, the received digital FM signal is verified at the data bit boundaries for inversion to detect errors. If an uninverted data bit boundary is detected, those sections of the digital FM signal just preceding and just following the uninverted data bit boundary are modified thereby generating two modified signals. Using the error detecting code included in the digital FM signal, the two modified signals are evaluated to determine which modification corrects the errors and the modified signal with the correct modification is selected.

摘要翻译： 在用于数字FM信号的解调器中，接收的数字FM信号在数据位边界处被验证用于反转以检测错误。 如果检测到未反转的数据位边界，那么刚好在未反转的数据位边界之后的数字FM信号的那些部分被修改，从而生成两个修改的信号。 使用包含在数字FM信号中的错误检测码，评估两个修改的信号以确定哪个修改校正错误，并且选择具有正确修改的修改信号。

公开(公告)号：US5907528A

公开(公告)日：1999-05-25

申请号：US665884

申请日：1996-06-19

申请人： Yoshiro Joichi

发明人： Yoshiro Joichi

IPC分类号： G11B7/0037 ,  G11B7/007 ,  G11B11/10 ,  G11B11/105 ,  G11B20/02 ,  G11B20/06 ,  G11B20/14 ,  G11B20/18 ,  H04M5/76

CPC分类号： G11B20/1419 ,  G11B20/025 ,  G11B20/06 ,  G11B11/10502 ,  G11B20/1833 ,  G11B7/0037 ,  G11B7/007

摘要： In a demodulator for a digital FM signal, the received digital FM signal is verified at the data bit boundaries for inversion to detect errors. If an uninverted data bit boundary is detected, those sections of the digital FM signal just preceding and just following the uninverted data bit boundary are modified thereby generating two modified signals. Using the error detecting code included in the digital FM signal, the two modified signals are evaluated to determine which modification corrects the errors and the modified signal with the correct modification is selected.

摘要翻译： 在用于数字FM信号的解调器中，接收的数字FM信号在数据位边界处被验证用于反转以检测错误。 如果检测到未反转的数据位边界，那么刚好在未反转的数据位边界之后的数字FM信号的那些部分被修改，从而生成两个修改的信号。 使用包含在数字FM信号中的错误检测码，评估两个修改的信号以确定哪个修改校正错误，并且选择具有正确修改的修改信号。

公开(公告)号：US5715353A

公开(公告)日：1998-02-03

申请号：US656443

申请日：1996-05-31

申请人： Chun-Sub Kim ,  Yong-Serk Kim

发明人： Chun-Sub Kim ,  Yong-Serk Kim

IPC分类号： H03B1/04 ,  H03C3/00 ,  H03D3/24 ,  H03K7/06 ,  H04N5/92 ,  H04N5/76 ,  G11B5/02 ,  G11B20/06

CPC分类号： H03C3/00 ,  H03K7/06 ,  H04N5/92 ,  H03B1/04 ,  H03D3/241

摘要： A playback/recording modulating-demodulating device, having a voltage-controlled oscillator (VCO), a voltage-current inverter (VCI), a band-pass filter, an amplitude limiter, and a phase-locked loop. In playback mode, the playback input signal is applied to the band-pass filter, the phase-locked loop is activated, and the VCI is set to produce a reference signal which controls the band-pass filter to tune the playback input signal. The tuned playback signal is applied to the amplitude limiter which produces an amplitude-limited signal which is applied to the phase-locked loop to produce a demodulated playback output signal. In record mode, the phase-locked loop is deactivated, the VCO produces a signal having a frequency which varies according to the voltage of a record input signal, and the VCI outputs a current control signal, having an output current related to the voltage of the record input signal, which is applied to the band-pass filter to control its bandwidth. A signal having a frequency value determined by the voltage of the record input signal is output by the VCO and applied to the band-pass filter, which outputs a record output signal. Thus, in the record mode, the bandwidth of the band-pass filter is related to the frequency of the signal which it filters.

摘要翻译： 具有压控振荡器（VCO），电压 - 电流逆变器（VCI），带通滤波器，限幅器和锁相环的重放/记录调制解调装置。 在回放模式中，重放输入信号被施加到带通滤波器，锁相环被激活，并且VCI被设置为产生控制带通滤波器的参考信号来调谐播放输入信号。 调谐回放信号被施加到幅度限制器，其产生施加到锁相环的振幅限制信号以产生解调的重放输出信号。 在记录模式下，锁相环被去激活，VCO产生具有根据记录输入信号的电压而变化的频率的信号，并且VCI输出电流控制信号，该电流控制信号具有与 记录输入信号，其被施加到带通滤波器以控制其带宽。 具有由记录输入信号的电压确定的频率值的信号由VCO输出并施加到输出记录输出信号的带通滤波器。 因此，在记录模式中，带通滤波器的带宽与其滤波的信号的频率有关。

公开(公告)号：US5615192A

公开(公告)日：1997-03-25

申请号：US319796

申请日：1994-10-07

申请人： Atsushi Kikukawa ,  Sumio Hosaka ,  Youji Maruyama ,  Toshimichi Shintani ,  Takeshi Shimano

发明人： Atsushi Kikukawa ,  Sumio Hosaka ,  Youji Maruyama ,  Toshimichi Shintani ,  Takeshi Shimano

IPC分类号： G11B5/00 ,  G11B5/02 ,  G11B7/12 ,  G11B7/135 ,  G11B7/14 ,  G11B9/00 ,  G11B11/00 ,  G11B11/105 ,  G11B13/00 ,  G11B20/06 ,  G11B20/10 ,  G11B27/30 ,  G11B7/00

CPC分类号： B82Y10/00 ,  G11B11/002 ,  G11B11/007 ,  G11B11/10536 ,  G11B11/10545 ,  G11B11/10576 ,  G11B13/00 ,  G11B20/06 ,  G11B20/10 ,  G11B27/3027 ,  G11B5/00 ,  G11B5/02 ,  G11B7/12 ,  G11B7/1384 ,  G11B7/14 ,  G11B9/14 ,  G11B20/14 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0021 ,  Y10S977/881 ,  Y10S977/932

摘要： A recording-reproducing apparatus can remarkably relax the reproduction tracking accuracy by use of a head wider than the track width. The carrier signal frequency assigned to a recording track is designated to a synthesized signal generator. In compliance with this designation, the synthesized signal generator generates a signal of the designated frequency. This carrier signal is amplitude-modulated by the baseband signal to be recorded in a mixer. The unrequired frequency components are removed from this modulation signal by a bandpass filter, and the resulting signal is recorded in a recording medium by a head. The recording medium and the head are in relative motion. In read mode, a track is specified by the carrier signal.

摘要翻译： 记录再现装置可以通过使用比轨道宽度更宽的头部显着地放松再现跟踪精度。 分配给记录磁道的载波信号频率被指定给合成信号发生器。 根据该指定，合成信号发生器产生指定频率的信号。 该载波信号由基带信号进行幅度调制，以记录在混频器中。 通过带通滤波器从该调制信号中去除非需要的频率分量，并将所得到的信号通过磁头记录在记录介质中。 记录介质和磁头相对运动。 在读取模式下，通过载波信号指定轨道。