公开(公告)号：EP0071325A3

公开(公告)日：1983-06-15

申请号：EP82301906

申请日：1982-04-13

Applicant: CONTROL DATA CORPORATION

Inventor： Brown, Charles Albert

IPC: H04J15/00 ,  G11B05/09 ,  H04L05/00

CPC classification number: G11B20/10 ,  H04L5/04

Abstract: A method of demultiplexing a composite signal (c) containing a plurality of data streams (a, b), each stream being coded in a polarised code and phase shifted from other data streams by a predetermined phase shift comprises: providing a correlator signal (d, f) for each data stream (a, b), each correlator signal being mutually orthogonal with the or each other correlator signal and phase shifted from the other correlator signals by the predetermined phase shift of its corresponding data stream, and separately multiplying the composite signal by each correlator signal to derive resultant signals (e, g) each representing the data bits in a respective one of the data streams. There is also provided an apparatus for carrying out this method.

公开(公告)号：EP0047955A3

公开(公告)日：1982-10-13

申请号：EP81107028

申请日：1981-09-07

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Todokoro, Shigeru ,  Kojima, Tadashi

IPC: H03K05/08 ,  G11B05/09

Abstract: A wave-shaping circuit which comprises a comparator (12) for comparing the level of a signal reproduced from a magnetic tape on which, for example, PCM signals are recorded with the level of a reference signal, and a D flip-flop circuit (26) for holding an output signal from the comparator for a prescribed period. Where the reproduced signal has a higher level than the original level of the reference signal, then the reference signal is made to have a higher level than the original level by an output signal from the D flip-flop circuit (26), that is, an output signal from the comparator (12). Where the reproduced signal has a lower level than the original level of a reference signal, then the reference signal is made to have a lower level than the original level by the output signal from the comparator (12). As a result, strains occurring at the high density recording are not reproduced.

Abstract translation: 波形整形电路包括比较器（12）和D触发器电路（12），比较器（12）用于将从记录有例如PCM信号的磁带再现的信号的电平与参考信号的电平进行比较， 26），用于在规定的时间内保持来自比较器的输出信号。 在再现信号具有比参考信号的原始电平高的电平的情况下，通过来自D触发器电路（26）的输出信号使参考信号具有比原始电平更高的电平，即， 来自比较器（12）的输出信号。 在再现信号具有比参考信号的原始电平低的电平的情况下，通过来自比较器（12）的输出信号使参考信号具有比原始电平更低的电平。 结果，在高密度记录下出现的应变不被再现。

公开(公告)号：EP0052520A3

公开(公告)日：1982-06-30

申请号：EP81305444

申请日：1981-11-18

Applicant: SONY CORPORATION ,  KABUSHIKI KAISHA TOSHIBA

Inventor： Hoshimi, Susumo ,  Kojima, Tadashi

IPC: G11B27/02 ,  G11B05/09

CPC classification number: G11B5/09 ,  G11B27/032 ,  G11B27/323 ,  G11B2220/90

Abstract: A PCM signal processor having a signal input terminal which receives a PCM data signal from a PCM data signal reproducing apparatus such as a VTR (18R), a memory (14) for storing the PCM data signal, a standardized signal input terminal for providing a standardized signal corresponding to a synchronizing signal for synchronizing the VTR (18P), an address counter (38) for designating the address of the memory (14) which is to be read, and means for providing the address counter (38) with preset data in response to the standardized signal.

公开(公告)号：EP0052519A3

公开(公告)日：1982-06-23

申请号：EP81305443

申请日：1981-11-18

Applicant: SONY CORPORATION ,  KABUSHIKI KAISHA TOSHIBA

Inventor： Hoshimi, Susumu ,  Kojima, Tadashi

IPC: G11B05/09 ,  G06F11/10

CPC classification number: G11B5/86 ,  G11B27/032 ,  G11B2220/90 ,  G11B2220/913

Abstract: A pulse code modulation (PCM) signal recording system includes a first signal processor (1 to 7) for processing a recording signal into a predetermined PCM signal, a second signal processor (18 to 24) for processing a reproduced PCM signal into a recording signal, a first clock signal generator (9) generating a master clock signal, a second clock signal generator (12 to 14) generating at least one recording clock signal from the master clock signal, the recording clock signal being supplied to the first signal processor (1 to 7), a third clock signal generator (27) generating at least one reproducing clock signal from the master clock signal, the reproducing clock signal being supplied to the second signal processor (18 to 24), a comparator (32) digitally comparing the phases of the second and third clock signals and producing a control signal, and a controller (29) receiving the control signal and controlling the second or third clock signal so that they are synchronized.

公开(公告)号：EP0031499A3

公开(公告)日：1982-03-03

申请号：EP80107633

申请日：1980-12-04

Applicant: International Business Machines Corporation

Inventor： Brewer, James Arthur ,  Lowy, John Alfred

IPC: G06F11/10 ,  G06F11/16 ,  G11B05/09

CPC classification number: G06F11/1008 ,  G06F3/0601 ,  G06F11/1076 ,  G06F11/14 ,  G06F2003/0691

Abstract: To provide for a more economic buffer capacity through facilitating high speed readback check of data transferred to a cyclic memory (16) from a free input buffer before the source data is lost, the cyclic memory is organized into a number of data blocks, each interleaved with or simultaneously accessible with the other data blocks. Thus, a long data record comprises several data blocks and therefore several cycles of the memory. A readback check of data transferred is accomplished by writing data into one check number generator (51) and one data block in a first cycle, writing data into another block on the second cycle while reading back the first data block to a second check number generator (52), continuing in this manner until the entire record is transferred, and reading the last block of written data into the check number generator (52). The two generated check numbers are then compared to detect any error and effect a retransfer if required before the source of the record is lost by overwriting.

Abstract translation: 为了提供更经济的缓冲器容量，通过在源数据丢失之前便利于从空闲输入缓冲器传送到循环存储器（16）的数据的高速回读检查，循环存储器被组织成多个数据块，每个交错 与其他数据块同时访问。 因此，长数据记录包括几个数据块，因此包括存储器的几个周期。 通过将数据写入一个检查号码发生器（51）和一个数据块（在第一个周期内），将数据写入第二个周期的另一个数据块，同时将第一个数据块读回第二个检查号码生成器 （52），以这种方式继续，直到整个记录被传送，并且将最后的写入数据块读入检查号码发生器（52）。 然后将两个生成的检查号进行比较以检测任何错误，并且如果需要，则在重写之前通过重写丢失记录源。

公开(公告)号：EP0032232A3

公开(公告)日：1981-12-02

申请号：EP80108136

申请日：1980-12-22

Applicant: POLYGRAM GmbH

Inventor： Griffiths, Frank Anthony ,  Hankinson, Joseph Roy

IPC: G11B05/09

CPC classification number: G11B20/12 ,  G11B20/1809 ,  G11B27/3027 ,  G11B2220/90

Abstract: A synchronizing system for the control of the transmission of digital information which is composed of blocks separated by gaps and for which synchronization requires the production of a reference pulse. Each field of information includes a series of spaced coded synchronizing control words each of which is a coded representation of the separation between the word and the position required for the synchronizing signal. The synchronizer (FIG. 3) includes a decoder composed of read-only memories (IC2, IC3) which can set a counter (IC4, IC5 and IC6) in accordance with the separation. The decoded synchronizing control signal is compared by comparator IC8 and a read-only memory IC7 with the instantaneous contents of the counter and the counter is adjusted only if parity is not detected. If parity is detected and continues to be detected for each synchronizing control word, the counter counts towards a datum whereupon the synchronizing signal is produced. The occasions of parity are counted by another counter which causes the production of an inhibiting signal for the output synchronizing signal unless a predetermined number of occasions of parity are counted.

公开(公告)号：WO1998027544A1

公开(公告)日：1998-06-25

申请号：PCT/US1997023245

申请日：1997-12-16

Applicant: CINRAM, INC.

Inventor： CINRAM, INC. ,  SUMMERS, G., Clayton

IPC: G11B05/09

CPC classification number: G11B19/24

Abstract: An improved method and apparatus for maintaining a recording head (26) in an optical recording system at a constant linear velocity relative to a rotatable disk support (10), a rotation controller (40) uses a cumulative measure of rotation to determine an angular velocity of the rotating disk support (10) necessary to maintain a constant linear velocity.

Abstract translation: 一种改进的方法和装置，用于相对于可旋转盘支撑件（10）以恒定的线速度将光记录系统中的记录头（26）保持在其中，旋转控制器（40）使用累积的旋转度量来确定角速度 的旋转盘支撑件（10），以保持恒定的线速度。

公开(公告)号：WO1998007144A1

公开(公告)日：1998-02-19

申请号：PCT/US1997013853

申请日：1997-08-06

Applicant: IOMEGA CORPORATION

Inventor： IOMEGA CORPORATION ,  JOHNSON, Paul, Ronald ,  PAN, Weiman ,  SHORT, Robert, L. ,  THORNLEY, Mark, Dale ,  WALLENTINE, Don, Wilford

IPC: G11B05/09

CPC classification number: G11B20/1217

Abstract: Inserting operational data onto a magnetic disk allows information to be transferred from a servowriter station (50) to a verifier station (60). This operational data allows disk specific operational data to follow the disk without separate means for attaching data to each disk. The servowriters, which cannot write information to disks at the data sector frequency, insert the operational data into selected greycodes in the servo sectors. When the disks are verified, the operational data may be moved from the servo sectors to the data sector in the Z-tracks for more permanent storage.

Abstract translation: 将操作数据插入磁盘允许将信息从伺服驱动器站（50）传送到验证站（60）。 此操作数据允许磁盘特定的操作数据跟随磁盘，而无需单独的方式将数据附加到每个磁盘。 无法以数据扇区频率将信息写入磁盘的伺服驱动器将操作数据插入到伺服扇区中的选定的磁带中。 当磁盘被验证时，操作数据可以从伺服扇区移动到Z轨道中的数据扇区以用于更永久的存储。

公开(公告)号：WO1998000839A1

公开(公告)日：1998-01-08

申请号：PCT/US1997010543

申请日：1997-06-18

Applicant: IOMEGA CORPORATION

Inventor： IOMEGA CORPORATION ,  THOMPSON, David, A. ,  THOMAS, Trent, M. ,  SANDMAN, Jim ,  HENINGER, Thane, S.

IPC: G11B05/09

CPC classification number: G06F3/0676 ,  G06F3/0626 ,  G06F3/0644 ,  G06F9/441

Abstract: A disk can store data from two different operating systems, particularly DOS and MAC OS formats. The initial sector on the disk, sector zero (12), is divided between the operating systems (102, 104, 106), allowing two sector signatures. As a result, DOS recognizes the disk as valid and the MAC OS can support a driver on the disk. According to another aspect of the invention, the DOS portion of the dual-format disk (20) is reclaimed by having a software program start its execution on the dual-format disk then switch its execution to another storage device. As a result, the program can dismount the dual-format disk and safely reclaim it for use on the MAC OS.

Abstract translation: 磁盘可以存储来自两个不同操作系统的数据，特别是DOS和MAC OS格式。 磁盘上的初始扇区扇区零（12）在操作系统（102,104,106）之间划分，允许两个扇区签名。 因此，DOS会将磁盘识别为有效，并且MAC OS可以支持磁盘上的驱动程序。 根据本发明的另一方面，双格式盘（20）的DOS部分通过使软件程序在双格式盘上开始执行然后将其执行切换到另一个存储设备而被回收。 因此，程序可以卸载双格式磁盘，并安全地回收它以供在MAC OS上使用。

公开(公告)号：WO1997020308A1

公开(公告)日：1997-06-05

申请号：PCT/IB1996001247

申请日：1996-11-18

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  STUPP, Steven, Elliot ,  STEK, Aalbert ,  CUMPSON, Stephen, Rodney

IPC: G11B05/09

CPC classification number: G11B5/65 ,  G11B5/00 ,  G11B5/09 ,  G11B5/23 ,  G11B5/74 ,  G11B5/78

Abstract: A combination is disclosed of a magnetic record carrier (1) and an apparatus for recording a digital information signal in a track on said record carrier. The apparatus comprises an input terminal (40) for receiving the digital information signal, an encoding unit (42) for encoding the digital information signal so as to obtain a digital channel signal suitable for recording, and a writing unit (44) for writing the digital channel signal in the track on the record carrier. The writing unit (44) comprises at least one write head (2) having a specific gap width (g). The apparatus is adapted to write the digital channel signal in the record carrier, with a bit-length which is smaller than 0.25 mu m and the record carrier (1) has an oblique easy-axis angle between 26 DEG and 35 DEG with regard to the longitudinal direction of the track and in a plane perpendicular to the record carrier.

Abstract translation: 公开了磁记录载体（1）和用于在所述记录载体上的轨道中记录数字信息信号的装置的组合。 该装置包括用于接收数字信息信号的输入端（40），用于对数字信息信号进行编码以获得适于记录的数字信道信号的编码单元（42），以及用于写入 数字通道信号在轨道上的记录载体上。 写入单元（44）包括具有特定间隙宽度（g）的至少一个写入头（2）。 该装置适于将数字通道信号写入记录载体中，位长小于0.25μm，记录载体（1）具有26°至35°之间的倾斜易轴角度，关于 轨道的纵向方向和垂直于记录载体的平面。