Process for reading information
    1.
    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
    2.
    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
    3.
    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
    4.
    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。

    System for serial reception or reading of information
    5.
    发明授权
    System for serial reception or reading of information 失效
    用于串行接收或读取信息的系统

    公开(公告)号:US5838743A

    公开(公告)日:1998-11-17

    申请号:US495583

    申请日:1995-08-09

    IPC分类号: G11B20/14 H04L7/033 H04L7/02

    摘要: This system for receiving or reading digital serial information provides for the information to be sampled at regular intervals under the control of a local clock. It includes a table containing for each pair of values of consecutive information samples a measured phase value.

    摘要翻译: PCT No.PCT / FR94 / 01433 Sec。 371日期:1995年8月9日 102(e)日期1995年8月9日PCT 1994年12月8日PCT PCT。 公开号WO95 / 16317 1995年6月15日该系统用于接收或读取数字串行信息,提供在本地时钟控制下定期采样的信息。 它包括一个表,其中包含连续信息样本的每对值的测量相位值。

    Optical track follower device with sampling
    6.
    发明授权
    Optical track follower device with sampling 失效
    带跟踪器的光轨随动装置

    公开(公告)号:US4535431A

    公开(公告)日:1985-08-13

    申请号:US406917

    申请日:1982-08-10

    CPC分类号: G11B7/0901 G11B7/0938

    摘要: The invention relates to devices for optically transcribing in a track carried by a support medium data to be written in or read out. The invention provides a pre-engraved track follower device for a transcription device in which a loop for radial control of the reading spot scanning the track is provided with sampling means taking samples during scanning of nonpost-engraved parts of a pre-engraved track, said scanning corresponding to a data write or read phase. The invention applies more particularly for digital data transcription devices using a single spot for locating a pre-engraved track and since optically writing data therein.

    摘要翻译: 本发明涉及用于在由支持介质携带的轨道中光学转录以写入或读出的数据的装置。 本发明提供了一种用于转录装置的预雕刻跟踪跟随装置,其中用于径向控制扫描轨道的读数点的回路具有采样装置,其在扫描预雕刻轨迹的非标刻部分期间取样,所述采样装置 扫描对应于数据写入或读取阶段。 本发明更具体地适用于使用用于定位预刻的轨道的单个点的数字数据转录装置,并且由此在其中光学地写入数据。

    Device and system for reading recording media with cross-talk correction
circuitry
    7.
    发明授权
    Device and system for reading recording media with cross-talk correction circuitry 失效
    用串扰校正电路读取记录媒体的装置和系统

    公开(公告)号:US5870361A

    公开(公告)日:1999-02-09

    申请号:US574410

    申请日:1995-12-15

    申请人: Michel Audoin

    发明人: Michel Audoin

    CPC分类号: G11B11/10547 G11B5/4969

    摘要: A device and system for the reading of a recording medium, which enables the reading of high-density information and the removal of disturbance (or cross-talk) from the information. The invention includes chiefly a reading device carrying out the parallel reading of the information from N pixels of an optical detector array and giving at least two sub-trains of samples in series (X, Y, Z), a cross-talk correction circuit for each sub-train of samples, each sub-train giving a train of cross-talk corrected samples (X', Y', Z'), and an input sequencer giving each correction circuit a train of samples to be corrected (Ys) from a first sub-frame of samples (Y) and samples (XN-1, Z0) from at least one second frame of samples (X,Z). This device and system can be applied to the reading of high-density recording media (magnetic or optical).

    摘要翻译: 用于读取记录介质的装置和系统,其能够读取高密度信息和从信息中去除干扰(或串扰)。 本发明主要包括读取装置,其执行从光学检测器阵列的N个像素的信息的并行读取,并给出串联(X,Y,Z)的至少两个子列的样本,串扰校正电路 每个子列的样本,每个子列提供串扰校正样本(X',Y',Z'),以及输入序列器,给每个校正电路提供要校正的样本串(Ys) 来自至少一个第二帧样本(X,Z)的样本(Y)和样本(XN-1,Z0)的第一子帧。 该装置和系统可应用于高密度记录介质(磁或光)的读取。

    Process and system for optical recording and reading on a mobile data
carrier
    9.
    发明授权
    Process and system for optical recording and reading on a mobile data carrier 失效
    在移动数据载体上进行光学记录和读取的过程和系统

    公开(公告)号:US4669077A

    公开(公告)日:1987-05-26

    申请号:US771269

    申请日:1985-08-30

    摘要: A process and device for focussing a light energy beam on a data carrier comprising sites fromed of virgin areas free from any data recording provided along tracks and serving as reference plane for said focussing. In a preferred variation, these areas are preceded by flags associated with a specific code. Control is achieved by measuring the deviation between the plane of focussing of a beam into a spot scanning the tracks and the reference plane formed by the surface of the virgin areas. Between two passages of these areas of the measurements are stored. The focussing error signal is obtained by filtering these measurements.

    摘要翻译: 一种用于将光能束聚焦在数据载体上的过程和装置,该数据载体包括来自原始区域的位置,没有沿着轨道提供的任何数据记录,并且用作用于所述聚焦的参考平面。 在优选的变型中,这些区域之前是与特定代码相关联的标志。 通过测量光束的聚焦平面到扫描轨道的点和由原始区域的表面形成的参考平面之间的偏差来实现控制。 存储这些测量区域的两段通道之间。 通过对这些测量进行滤波获得聚焦误差信号。

    Process and system for optical recording and reading on a mobile data
carrier
    10.
    发明授权
    Process and system for optical recording and reading on a mobile data carrier 失效
    在移动数据载体上进行光学记录和读取的过程和系统

    公开(公告)号:US4561082A

    公开(公告)日:1985-12-24

    申请号:US503655

    申请日:1983-06-13

    摘要: A process and device for focussing a light energy beam on a data carrier comprising sites formed of virgin areas free from any data recording provided along tracks and serving as reference plane for said focussing. In a preferred variation, these areas are preceded by flags associated with a specific code. Control is achieved by measuring the deviation between the plane of focussing of a beam into a spot scanning the tracks and the reference plane formed by the surface of the virgin areas. Between two passages of these areas the measurements are stored. The focussing error signal is obtained by filtering these measurements.

    摘要翻译: 一种用于将光能束聚焦在数据载体上的过程和装置,所述数据载体包括由没有沿着轨道提供的任何数据记录的未处理区域形成的位置,并且用作用于所述聚焦的参考平面。 在优选的变型中,这些区域之前是与特定代码相关联的标志。 通过测量光束的聚焦平面到扫描轨道的点和由原始区域的表面形成的参考平面之间的偏差来实现控制。 在这些区域的两段通道之间存储测量值。 通过对这些测量进行滤波获得聚焦误差信号。