Method and apparatus for preventing cross-talk during reproduction of
data recorded on a high density recording medium
    1.
    发明授权
    Method and apparatus for preventing cross-talk during reproduction of data recorded on a high density recording medium 失效
    用于在再现记录在高密度记录介质上的数据时防止串扰的方法和装置

    公开(公告)号:US5493553A

    公开(公告)日:1996-02-20

    申请号:US284653

    申请日:1994-08-17

    摘要: A method and system for preventing cross-talk during reproduction of data recorded on a high density recording medium. The method includes the steps of receiving signals from at least three consecutively parallel information tracks on a recording medium, determining first and second cross-talk coefficients representing a degree of cross-talk between the three parallel information tracks, filtering the first and second cross-talk coefficients, correcting the cross-talk between the first, second, and third information tracks in accordance with the first and second cross-talk coefficients, forming a difference between the first and second cross-talk coefficients and integrating this difference to generate a track following correction signal, and repeating the above steps for each of the information tracks on the recording medium.

    摘要翻译: PCT No.PCT / FR93 / 01279 Sec。 371日期:1994年8月17日 102(e)日期1994年8月17日PCT提交1993年12月21日PCT公布。 出版物WO94 / 15335 日期:1994年7月7日。一种用于在再现记录在高密度记录介质上的数据时防止串扰的方法和系统。 该方法包括以下步骤:从记录介质上的至少三个连续并行的信息轨道接收信号,确定表示三个并行信息轨迹之间的串扰程度的第一和第二串扰系数, 通话系数,根据第一和第二串扰系数校正第一,第二和第三信息轨道之间的串扰,形成第一和第二串扰系数之间的差异并积分该差异以产生轨迹 跟随校正信号,并且对记录介质上的每个信息轨道重复上述步骤。

    Process for reading information
    4.
    发明授权
    Process for reading information 失效
    读取信息的过程

    公开(公告)号:US5963525A

    公开(公告)日:1999-10-05

    申请号:US750798

    申请日:1996-12-20

    摘要: A process for reading binary information written on a carrier. The carrier has at least one track and the binary information is written onto the carrier at a frequency Fbit. The process includes the step of reading binary information at the sampling frequency F.sub.e to form a succession of successive read samples SAM(k) of the same track. SAM(k) is the read sample of order k, each read sample having a phase .phi.(k) lying between 0 and 2.pi.. The method further includes a step of interpolating to make it possible to calculate an interpolated sample I(k) with phase equal to .pi. which corresponds to read sample SAM(k) on the basis of the read sample and on the i+j read samples which bracket the original read sample SAM(k) such that:I(k)=a.sub.k-i SAM(k-i)+ . . . +a.sub.k SAM(k)+ . . . +a.sub.k+j SAM(k+j)The coefficients have values which depend on the chosen law of interpolation and a step of validation makes it possible to generate an information item intended to validate or invalidate the interpolated sample. The process is especially useful for the reading of binary information written on a large number of tracks.

    摘要翻译: PCT No.PCT / FR96 / 00601 Sec。 371日期1996年12月20日第 102(e)日期1996年12月20日PCT PCT 1996年4月19日PCT公布。 WO96 / 33490 PCT公开 日期1996年10月24日读取在载体上写入二进制信息的过程。 载波具有至少一个轨道,二进制信息以频率Fbit写入载波。 该处理包括以采样频率Fe读取二进制信息以形成相同轨道的连续读取样本SAM(k)的一系列的步骤。 SAM(k)是阶数k的读取样本,每个读取样本具有位于0和2π之间的相位phi(k)。 该方法还包括一个内插步骤,使得有可能根据读取的样本和i + j个读取样本,计算相位等于对应于读取样本SAM(k)的pi的内插样本I(k) 其包含原始读取样本SAM(k),使得:I(k)= ak-i SAM(ki)+。 。 。 + ak SAM(k)+。 。 。 + ak + j SAM(k + j)系数具有取决于所选择的内插定律的值,并且验证步骤使得可以生成旨在验证或使内插样本无效的信息项。 该过程对于读取写在大量轨道上的二进制信息特别有用。

    Tracking system for recording/reading a data medium and recording medium
    5.
    发明授权
    Tracking system for recording/reading a data medium and recording medium 失效
    用于记录/读取数据介质和记录介质的跟踪系统

    公开(公告)号:US06977875B1

    公开(公告)日:2005-12-20

    申请号:US10019277

    申请日:1999-07-09

    摘要: The invention relates to a system for reading a magnetic medium having several tracks of data which can be read in parallel with a detection device having at least as many detectors as there are tracks, making it possible to read simultaneously and at regular intervals a sample of data on each track. This system furthermore includes a processing circuit configured to receive each sample of data to be processed from each track together with sample of a first adjacent track and sample of a second adjacent track and to calculate the cross-talk affecting the sample of data to be processed due to the adjacent tracks. An integration circuit configured to receive the cross-talk value calculated by the processing circuit, integrates these values at each read time, and at subsequent read times. The systems also include a relative track-following control circuit configured to receive the result of integration of the integrator circuit and to supply a track-following control signal for the detection device.

    摘要翻译: 本发明涉及一种用于读取具有多个数据轨迹的磁介质的系统,该系统可以与具有至少与磁道一样多的检测器的检测装置并行读取,使得可以同时且以规则的间隔读取样品 每条轨道上的数据。 该系统还包括处理电路,其被配置为从每个轨道接收要处理的数据的每个采样以及第二相邻轨道的第一相邻轨道和采样的样本,并且计算影响待处理数据样本的串扰 由于相邻轨道。 被配置为接收由处理电路计算出的串扰值的积分电路,在每个读取时间和随后的读取时间对这些值进行积分。 所述系统还包括相对跟踪跟踪控制电路,其被配置为接收积分器电路的积分结果并为检测装置提供跟踪跟踪控制信号。

    Clock circuit for the reading of sequentially recorded information
elements in a multitrack recording system
    6.
    发明授权
    Clock circuit for the reading of sequentially recorded information elements in a multitrack recording system 失效
    用于在多轨记录系统中读取顺序记录的信息元素的时钟电路

    公开(公告)号:US5986834A

    公开(公告)日:1999-11-16

    申请号:US478809

    申请日:1995-06-07

    摘要: A clock circuit for the reading of sequential information elements includes a phase-locked loop for the control of the controlled oscillator. In the case of a reading system with n tracks, the phase computation circuit, the digital filter and the controlled oscillator each include as many memories (delay circuits R 1.1, . . . R 2.1, . . . R 3.1, . . . ) as there are samples of information elements (or information tracks) to be processed almost simultaneously. The invention finds particular application in the reading of high-density recording media.

    摘要翻译: 用于读取顺序信息元件的时钟电路包括用于控制受控振荡器的锁相环。 在具有n个磁道的读取系统的情况下,相位计算电路,数字滤波器和受控振荡器各自包含尽可能多的存储器(延迟电路R 1.1,...,R 2.1,...,R 3.1,...) 因为几乎同时处理信息元素(或信息轨迹)的样本。 本发明特别适用于高密度记录介质的读取。

    Reading device with cross-talk correction of two signal trains
    7.
    发明授权
    Reading device with cross-talk correction of two signal trains 失效
    阅读器具有两路信号串的串扰校正功能

    公开(公告)号:US5703845A

    公开(公告)日:1997-12-30

    申请号:US559319

    申请日:1995-11-15

    CPC分类号: G11B5/4992 G11B15/12

    摘要: A reading head has odd and even elemental areas for reading corresponding odd and even information segments that alternate to make up a frame of information on a record medium. The odd elemental areas provide a train of sequential odd information segments, each odd segment having cross-talk associated with the neighboring even segments which are on either side thereof when it is read from the record medium. Similarly, the even elemental areas provide a train of even information segments, each even segment having cross-talk associated with the odd segments which neighbored it on either side when it is read from the record medium. To correct for such cross-talk in both signal trains, both are fed to each of two cross-talk correcting circuits. These circuits derive needed adjacent segment information as to the cross-talk producing adjacent segments from one of the trains being fed thereto so as to process the segments of the other train being fed thereto for cross-talk correction.

    摘要翻译: 读头具有用于读取对应的奇数和偶数信息段的奇数和偶数元素区域,以替代以构成记录介质上的信息帧。 奇元素区域提供一系列连续的奇数信息段,当从记录介质读取时,每个奇数段具有与相邻偶数段相关联的串扰,这些相邻偶数段在其任一侧。 类似地,偶数元素区域提供一系列均匀的信息段,每个偶数段具有与从记录介质读取时在任一侧相邻的奇数段相关联的串扰。 为了纠正这两个信号串中的这种串扰,两个馈送到两个串扰校正电路中的每一个。 这些电路得到所需的相邻段信息,以便从馈送到其中的列车之一产生相邻段的串扰,以便处理馈送到其中的其它列的段以用于串扰校正。

    Laser Device Comprising Means for Controlling the Phase of a Large Number of Coherent Sources
    8.
    发明申请
    Laser Device Comprising Means for Controlling the Phase of a Large Number of Coherent Sources 有权
    激光装置包括用于控制大量相干源的相位的装置

    公开(公告)号:US20090316734A1

    公开(公告)日:2009-12-24

    申请号:US12487504

    申请日:2009-06-18

    IPC分类号: H01S3/30

    摘要: The invention relates to a laser device comprising a number of fibre amplifiers (3) delivering a number of optical waves, which is supplied by an oscillator (1) that delivers a signal wave, characterized in that said device comprises: a coherent source (4) emitting a coherent wave at a wavelength approximately equal to that of the signal wave and the propagation direction of which is inclined to the propagation direction of the optical waves output by the fibre amplifiers; means for making the coherent wave interfere with the optical waves output by the fibre amplifiers, and generating an interferogram consisting of an array of fringes; interferogram detection means (7), the relative positions of the fringes transcribing an inter-fibre phase law; a spatial phase modulator (2); and processing/display means (6) for processing the detected phase law and for displaying it on the spatial modulator, said spatial modulator being positioned so as to be able to be read by the signal wave and thus generate a phase-modulated signal wave selectively at each of the fibre amplifiers, compensating for the phase shifts induced by said fibre amplifiers.

    摘要翻译: 本发明涉及一种包括多个光纤放大器(3)的激光装置,该多个光纤放大器(3)由传送信号波的振荡器(1)提供,其特征在于所述装置包括:相干光源(4) )发射波长近似等于信号波的相干波,其传播方向与由光纤放大器输出的光波的传播方向倾斜; 用于使相干波干扰由光纤放大器输出的光波的装置,以及产生由条纹阵列组成的干涉图; 干涉图检测装置(7),条纹转录纤维间相位定律的相对位置; 空间相位调制器(2); 以及处理/显示装置(6),用于处理所检测的相位定律并将其显示在空间调制器上,所述空间调制器被定位成能够被信号波读取,从而选择性地产生相位调制的信号波 在每个光纤放大器中,补偿由所述光纤放大器引起的相移。

    Method of reading recording data and a read system
    9.
    发明授权
    Method of reading recording data and a read system 失效
    读取记录数据和读取系统的方法

    公开(公告)号:US5459619A

    公开(公告)日:1995-10-17

    申请号:US311715

    申请日:1994-09-23

    摘要: The invention relates to a method and system reading data recorded in the form of tracks on a magnetic recording medium. The recorded data is read by a row of read heads greater in number than a number of data tracks. The system of the invention does not require the read heads to follow the data tracks when reading recorded data, and allows a magnetic tape to be read even if the positions of the data tracks relative to the read head positions are unknown. The reading system of the present invention finds particular application in the area of reading high density recorded magnetic tapes.

    摘要翻译: 本发明涉及一种以磁迹形式记录在磁记录介质上的数据的方法和系统。 所记录的数据由比数据轨道数更多的一行读头读取。 当读取记录的数据时,本发明的系统不需要读取磁头跟随数据磁道,并且即使数据磁道相对于读取磁头位置的位置是未知的,也可以读取磁带。 本发明的读取系统在读取高密度记录磁带的领域中具有特别的应用。

    High resolution magneto-optic read head
    10.
    发明授权
    High resolution magneto-optic read head 失效
    高分辨率磁光读头

    公开(公告)号:US5227938A

    公开(公告)日:1993-07-13

    申请号:US675912

    申请日:1991-05-02

    IPC分类号: G11B11/10 G11B5/49 G11B11/105

    CPC分类号: G11B5/4946 G11B11/10547

    摘要: The magnetic head of the invention is composed of several micro-heads each of which comprises, on a substrate (2'), a garnet (3') and two pole pieces (7, 8) separated by a narrow air-gap (9).

    摘要翻译: PCT No.PCT / FR90 / 00703 Sec。 371日期1991年5月2日 102(e)日期1991年5月2日PCT提交1990年10月3日PCT公布。 公开号WO91 / 05345 日本1991年04月18日。本发明的磁头由几个微头组成,每个微头在衬底(2')上包括石榴石(3')和两个极片(7,8),两个极片(7,8)由 狭窄的气隙(9)。