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1.发明授权Recording an information signal on a record carrier provided with tracking signals 失效在提供跟踪信号的记录载体上记录信息信号
公开(公告)号：US5933290A
公开(公告)日：1999-08-03
申请号：US744798
申请日：1996-11-06
IPC分类号： G11B20/10 , G11B5/55 , G11B5/584 , G11B20/12 , G11B21/08 , G11B21/10 , G11B27/032 , G11B27/034 , G11B27/036 , G11B5/596
CPC分类号： G11B21/081 , G11B21/10 , G11B27/036 , G11B2220/20 , G11B2220/90 , G11B27/032 , G11B27/034 , G11B5/5508
摘要： An apparatus for recording an information signal on a record carrier where the record carrier has a first and a second tracking signal of specific frequencies and wavelengths. The tracking signals are recorded in respective first and second tracks which run parallel to each other in their longitudinal direction on the record carrier. The apparatus is provided With a receiver for receiving the information signal, and a converter for converting the information signal into a channel signal. The channel signal includes signal blocks of information with each signal block including a portion of the information signal. A writing head writes the channel signal in a third track on the record carrier. A reading head is adapted to read at least one of the first and second tracking signals from the first and second tracks. A generator generates a control signal from the at least first and second tracking signals read from the record carrier. The apparatus is adapted to record the information signal on the record carrier so that the length of a signal block of the channel signal is equal to an integer multiple of the wavelength of one of the first and second tracking signals.
摘要翻译： 一种用于在记录载体上记录信息信号的装置，其中记录载体具有特定频率和波长的第一和第二跟踪信号。 跟踪信号被记录在相应的第一和第二轨道上，该第一和第二轨迹在记录载体上沿纵向彼此平行延伸。 该装置具有用于接收信息信号的接收器和用于将信息信号转换成信道信号的转换器。 信道信号包括信息块，每个信号块包括信息信号的一部分。 写入头将信道信号写入记录载体上的第三个轨道。 读头适于从第一和第二轨道读取第一和第二跟踪信号中的至少一个。 发生器根据从记录载体读取的至少第一和第二跟踪信号产生控制信号。 该装置适于将信息信号记录在记录载体上，使得信道信号的信号块的长度等于第一和第二跟踪信号之一的波长的整数倍。
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2.发明授权
公开(公告)号：US5949607A
公开(公告)日：1999-09-07
申请号：US744800
申请日：1996-11-06
CPC分类号： G11B5/584 , G11B5/00817 , G11B5/4893 , G11B5/58 , G11B5/596 , G11B2005/0016
摘要： A system and method for recording and reproducing information includes a magnetic tape, a magnetic-head unit and an actuator. The magnetic tape has servo tracks containing servo signals. The servo signals have been written with a magnetic head, not shown, having a comparatively large gap length. As a result, the servo signals are recorded deep into the magnetic tape. The magnetic-head unit comprises a read head and a write head to inscribe the track, the read head following a bounding line between adjacent servo tracks and in response to the servo signals read from said servo tracks and by the read head. The system in accordance with the invention is characterized in that it comprises control means which determine the sequence in which the information tracks are written, the read head either following a track or between two respective non-overwritten parts of the magnetic tape, or following a track or between two respective overwritten parts of the magnetic tape.
摘要翻译： 用于记录和再现信息的系统和方法包括磁带，磁头单元和致动器。 磁带具有包含伺服信号的伺服轨迹。 伺服信号已经被写入具有较大间隙长度的磁头（未示出）。 结果，伺服信号被深度地记录到磁带中。 磁头单元包括读头和写入头，用于记录轨道，读头与相邻伺服轨道之间的边界线并且响应于从所述伺服轨道读取的伺服信号和读头。 根据本发明的系统的特征在于，其包括控制装置，其确定信息轨迹被写入的顺序，读取头在磁道之后或磁带的两个相应非重写部分之间，或者跟随 轨道或磁带的两个相应的覆盖部分之间。
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3.发明授权System for recording and/or reproducing information medium for use in the system, and magnetic write head and arrangement for formatting the medium 失效用于记录和/或再现用于系统中的信息介质的系统，以及用于格式化介质的磁写头和排列
公开(公告)号：US6061196A
公开(公告)日：2000-05-09
申请号：US972976
申请日：1997-11-19
IPC分类号： G11B5/008 , G11B5/48 , G11B5/55 , G11B5/58 , G11B5/584 , G11B5/596 , G11B5/78 , G11B5/82 , G11B15/087 , G11B15/52 , G11B25/06 , G11B33/14 , G11B5/09
CPC分类号： G11B5/4886 , G11B15/087 , G11B5/4893 , G11B5/5526 , G11B5/5565 , G11B5/5582 , G11B5/58 , G11B5/584 , G11B5/59605 , G11B5/59627 , G11B5/5965 , G11B5/59688 , G11B5/78 , G11B15/52 , G11B25/063 , G11B33/14 , G11B5/00817 , G11B5/82
摘要： The invention relates to a comprising a magnetic tape formatted by a write head, and an apparatus comprising a magnetic head unit which is movable on a transverse direction by an actuator. The write head records the magnetic tape with a pattern of servotracks ST101-ST127 which extend in a longitudinal direction. The odd-numbered servotracks contain a first servosignal and the even-numbered servotracks contain a second servosignal Sb which is phase opposition to the first servosignal. The servotracks ST103-ST113 and ST116-ST126 have a typical width W1 and form a group of two bands of N1 servotracks which are separated by a band of N2 servotracks ST114, ST115 having a typical width W2. The magnetic tape is adapted to cooperate with an apparatus comprising eight magnetic write heads. The actuator is controlled in response to the servosignals read by the heads. The center-to-center distance between the magnetic write heads is equal to four times the typical width W1 and, moreover, it holds that:N2=2, 4, 6 etc. and W2=(k+1/2)W1or N2=1, 3, 5 etc. and W2=2k.W1,where k=1, 2 etc.
摘要翻译： 本发明涉及一种包括由写头格式化的磁带，以及包括磁头单元的装置，该磁头单元可通过致动器在横向方向上移动。 写磁头记录具有在纵向上延伸的伺服机架ST101-ST127的图形的磁带。 奇数伺服机构包含第一伺服信号，偶数伺服机构包含与第一伺服信号相反的第二伺服信号Sb。 伺服电机ST103-ST113和ST116-ST126具有典型的宽度W1，并形成由具有典型宽度W2的N2伺服磁带ST114，ST115的频带分离的N1个伺服磁带的一组两个频带。 该磁带适于与包括八个磁写头的装置配合。 响应于头读取的伺服信号来控制致动器。 磁写头之间的中心到中心的距离等于典型宽度W1的四倍，此外，它保持：N2 = 2,4,6等，W2 =（k ++ E，fra 1 / 2 + EE）W1或N2 = 1,3,5等，W2 = 2k.W1，其中k = 1,2等。
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4.发明授权Arrangement for correcting pulse distortion in homochronous data transmission 失效用于校正同步数据传输中的脉冲失真的布置
公开(公告)号：US4464746A
公开(公告)日：1984-08-07
申请号：US342984
申请日：1982-01-26
CPC分类号： H04L25/03038 , H04B3/231 , H04L25/03057
摘要： In the duplex transmission of data signals over two-wire transmission paths the phenomenon of echo-signals is encountered, while simultaneously intersymbol interference occurs between the data symbols themselves. In order to reduce the influence of both the echo signals, and the intersymbol interference, the arrangement comprises a random access memory (16) which produces a correction value (c(i)) at each sampling instant to correct the received data signal. The memory is addressed from registers (13, 14) and a counter (15), the contents of the registers being determined by the data ssymbols transmitted last and the data symbols received last, respectively. A D-A converter (19) converts the correction value into a correction signal (c(t)), which in a difference producer (20) is subtracted from the received data signal. A sampling arrangement (21) samples the corrected received data signal. After D-A conversion (22) and multiplication (17) by a predetermined factor .alpha. each sample furnishes a number by which the correction value is changed to match it to the value of the pulse distortion at the sampling instant.
摘要翻译： 在通过双线传输路径的数据信号的双工传输中，遇到回波信号的现象，同时在数据符号本身之间同时发生符号间干扰。 为了减少回波信号和符号间干扰的影响，该装置包括在每个采样时刻产生校正值（c（i））的随机存取存储器，以校正接收到的数据信号。 存储器从寄存器（13,14）和计数器（15）寻址，寄存器的内容分别由最后发送的数据符号和最后接收的数据符号确定。 D-A转换器（19）将校正值转换成从接收到的数据信号中减去差分产生器（20）的校正信号（c（t））。 采样装置（21）对经校正的接收数据信号进行采样。 在D-A转换（22）和乘法（17）乘以预定因子α之后，每个样本提供校正值改变的数量，使其与采样时刻的脉冲失真值相匹配。
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公开(公告)号：US5805372A
公开(公告)日：1998-09-08
申请号：US759668
申请日：1996-12-06
CPC分类号： G11B5/584 , G11B5/5508
摘要： An apparatus is disclosed for positioning a head relative to a plurality of tracks running parallel to each other in their longitudinal direction on a record carrier. The apparatus comprises a position detection unit for detecting the position of the head in a transverse direction, which has an output for supplying a first and a second position signal when the head is positioned onto each of two tracks. A memory is present for storing the first and second position signals. In a calibration mode of operation, a control signal generator generates a control signal to position the head onto one of the tracks and the memory stores the position signal generated by the position detection means. The control signal generator subsequently generates a second control signal so as to position the head onto the other track. The memory stores the second position signal generated by the position detection means. These position signals are recalled from memory when the apparatus switches from one track to the other, to effect an immediate positioning of the head to the desired track.
摘要翻译： 公开了一种用于将头相对于在其纵向上彼此平行延伸的多个轨道定位在记录载体上的装置。 该装置包括位置检测单元，用于检测头部在横向上的位置，该位置检测单元具有当头部位于两个轨迹中的每一个上时提供第一和第二位置信号的输出。 存在用于存储第一和第二位置信号的存储器。 在校准操作模式中，控制信号发生器产生控制信号以将磁头定位在一个轨道上，存储器存储由位置检测装置产生的位置信号。 控制信号发生器随后产生第二控制信号，以将头部定位在另一个轨道上。 存储器存储由位置检测装置产生的第二位置信号。 当设备从一个轨道切换到另一个轨道时，这些位置信号从存储器调用，以实现头部到期望的轨道的立即定位。
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公开(公告)号：US4481385A
公开(公告)日：1984-11-06
申请号：US374122
申请日：1982-05-03
申请人： Johannes J. W. Kalfs
发明人： Johannes J. W. Kalfs
CPC分类号： H04B3/23
摘要： Arrangement for cancelling echo signals in data transmission over a two-wire transmission path. The data signals occurring in the send path are applied to an adjustable signal processing arrangement. From said data signals a synthetic echo signal (e(t)) is derived which is subtracted in a difference producer from the data signal occurring in the receive path. The residual signal (r(t)) is converted into a digital residual signal (r(j)) in an analog-to-digital converter arrangement. An interpolator which increases the sampling rate by a factor L results in the production of a digital control signal (r(i)) from the digital residual signal, for the setting arrangement. The sampling rate of the digital residual signal is M/LT Hz, wherein T is the duration of a data symbol in sec. and M and L represent integers which are relatively prime, L being greater than one.
摘要翻译： 通过双线传输路径数据传输中消除回波信号的布置。 发送在发送路径中的数据信号被应用于可调信号处理装置。 从所述数据信号中导出合成回波信号（e（t）），其在差产生器中从在接收路径中出现的数据信号中减去。 残留信号（r（t））在模数转换器装置中转换成数字残差信号（r（j））。 对于设置布置，将采样率增加了因子L的内插器导致从数字残差信号产生数字控制信号（r（i））。 数字残差信号的采样率为M / LTHz，其中T为数据符号的持续时间，单位为秒。 M和L表示相对素数的整数，L大于1。
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7.发明授权Magnetic recording method and apparatus which provide at least two write pulses for each binary signal bit to be recorded 失效对要记录的每个二进制信号位提供至少两个写入脉冲的磁记录方法和装置
公开(公告)号：US5912637A
公开(公告)日：1999-06-15
申请号：US744801
申请日：1996-11-06
CPC分类号： G11B20/10009 , G11B5/09
摘要： A method and an apparatus are disclosed for recording a binary signal onto a magnetic record carrier. The binary signal is supplied to an input terminal. The apparatus comprise generators for generating at least two write pulses (P.sub.1,P.sub.2) for each bit of the binary signal to be written. More specifically, the generators are adapted to(i) generate at least two write pulses of a third polarity for the first bit of the first polarity in the first sequence,(ii) generating a write pulse of the third polarity and a write pulse of a fourth polarity for the at least second bit of the first polarity occurring in the first sequence, the third polarity being opposite to the fourth polarity,(iii) generating at least two write pulses of the fourth polarity for the first bit of the second polarity in the second sequence,(iv) generating a write pulse of the third polarity and a write pulse of the fourth polarity for the at least second bit of the second polarity occurring in the second sequence.
摘要翻译： 公开了用于将二进制信号记录到磁记录载体上的方法和装置。 二进制信号被提供给输入端。 该装置包括用于为待写入的二进制信号的每一位产生至少两个写脉冲（P1，P2）的发生器。 更具体地，发生器适于（i）在第一序列中为第一极性的第一位产生第三极性的至少两个写入脉冲，（ii）产生第三极性的写入脉冲和写入脉冲 第一极性的第一极性的至少第二位的第四极性，第三极性与第四极性相反，（iii）产生第二极性的第四极性的至少两个写脉冲， 在第二序列中，（iv）产生第二极性的写入脉冲和第二极性的写入脉冲，用于在第二个序列中出现的第二极性的至少第二位。
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8.发明授权System for recording and/or reproducing information medium for use in the system, and magnetic write head and arrangement for formatting the medium 失效用于记录和/或再现用于系统中的信息介质的系统，以及用于格式化介质的磁写头和排列公开(公告)号：US06477003B1
公开(公告)日：2002-11-05
申请号：US09525852
申请日：2000-03-15
IPC分类号： G11B5265
CPC分类号： G11B5/4886 , G11B5/00817 , G11B5/4893 , G11B5/5526 , G11B5/5565 , G11B5/5582 , G11B5/58 , G11B5/584 , G11B5/59605 , G11B5/59627 , G11B5/5965 , G11B5/59688 , G11B5/78 , G11B5/82 , G11B15/087 , G11B15/52 , G11B25/063 , G11B33/14
摘要： System for recording and/or reproducing information, medium for use in the system, and magnetic write head for formatting the medium. The invention relates to a system including a magnetic tape (310) formatted by way of a write head (360), and an apparatus incluiding a magnetic head unit (320) which is movable on a transverse direction (y) by way of an actuator. By way of the write head (360) the magnetic tape (310) has been provided with a pattern of servotracks ST101-ST127 which extend in a longitudinal direction (x). The odd-numbered servotracks contain a first servosignal and the even-numbered servotracks contain a second servosignal Sb which is phase opposition to the first servosignal. The servotracks ST103-ST113 and ST116-ST126 have a typical width W1 and form a group of two bands of N1 servotracks which are separated by a band of N2 servotracks ST114, ST115 having a typical width W2. The magnetic tape (310) is provided to cooperate with an apparatus including eight magnetic write heads (H31-H38). The actuator is controlled in response to the servosignals read by the heads. The center-to-center distance (p) between the magnetic write heads (H31-H38) is equal to four times the typical width W1 and, moreover, it holds that: N2=2, 4, 6 etc. and W2=(k+½)W1 or N2=1, 3, 5 etc. and W2=2k.W1, where k=1, 2 etc.
摘要翻译： 用于记录和/或再现信息的系统，用于系统的介质和用于格式化介质的磁写头。 本发明涉及一种包括通过写入头（360）格式化的磁带（310）的系统，以及一种包括磁头单元（320）的装置，该磁头单元可通过致动器在横向（y）上移动 。 通过写入头（360），磁带（310）已经设置有沿纵向方向（x）延伸的伺服轨道ST101-ST127的图案。 奇数伺服机构包含第一伺服信号，偶数伺服机构包含与第一伺服信号相反的第二伺服信号Sb。 伺服电机ST103-ST113和ST116-ST126具有典型的宽度W1，并形成由具有典型宽度W2的N2伺服磁带ST114，ST115的频带分离的N1个伺服磁带的一组两个频带。 提供磁带（310）以配合包括八个磁写头（H31-H38）的设备。 响应于头读取的伺服信号来控制致动器。 磁写头（H31-H38）之间的中心到中心距离（p）等于典型宽度W1的四倍，此外，它保持：N2 = 2,4,6等，W2 =（ k +½）W1或N2 = 1,3,5等，W2 = 2k.W1，其中k = 1,2等。
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9.发明授权Apparatus for reproducing n digital signals from n adjacent tracks on a record carrier 失效用于从记录载体上的n个相邻轨道再现n个数字信号的装置
公开(公告)号：US5488516A
公开(公告)日：1996-01-30
申请号：US214913
申请日：1994-03-17
CPC分类号： G11B15/52 , G11B20/20 , G11B20/225
摘要： For the clock extraction from n digital signals read from each of n tracks there are provided n phase-locked loops. In order to compensate for speed variations in the speed of transport of the record carrier there is provided an additional frequency control system. This system derives a control signal which is a measure of the speed variations, which control signal is applied to the voltage-controlled oscillators of all the phase-locked loops as a common control signal.
摘要翻译： 对于从n个磁道中的每一个读取的n个数字信号的时钟提取，提供了n个锁相环。 为了补偿记录载体的传输速度的速度变化，提供了附加的频率控制系统。 该系统导出控制信号，该控制信号是速度变化的量度，其控制信号被施加到所有锁相环的电压控制振荡器作为公共控制信号。
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10.发明授权Data processing system in which unreliable words in the memory are replaced by an unreliability indicator 失效数据处理系统，其中存储器中的不可靠字被替换为不可靠性指示符
公开(公告)号：US4641310A
公开(公告)日：1987-02-03
申请号：US666710
申请日：1984-10-31
CPC分类号： G11B20/18 , G06F11/10 , G11B20/1813
摘要： A data processing system comprising a memory receives data in the form of data blocks. Such a data block contains at least one data word and check bits. On the basis of the check bits it is vertified whether the data block contains reliable or unreliable data words. The unreliable data words are not written into the memory but are replaced by an unreliability indicator which is written into the memory at the address reserved for the unreliable dataword in question.
摘要翻译： 包括存储器的数据处理系统以数据块的形式接收数据。 这样的数据块包含至少一个数据字和校验位。 在校验位的基础上，数据块是否包含可靠或不可靠的数据字是无偏的。 不可靠的数据字不被写入存储器中，而是被不可靠性指示符代替，该不可靠性指示符被写入存储器中，用于为所讨论的不可靠数据字保留。
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