公开(公告)号：US5526329A

公开(公告)日：1996-06-11

申请号：US381617

申请日：1995-01-30

申请人： John E. Bish ,  David E. Call ,  Glen A. Jaquette ,  Judson A. McDowell ,  Arturo A. Mojica ,  Lawrence D. Tipton

发明人： John E. Bish ,  David E. Call ,  Glen A. Jaquette ,  Judson A. McDowell ,  Arturo A. Mojica ,  Lawrence D. Tipton

IPC分类号： G11B7/004 ,  G11B7/00

CPC分类号： G11B7/004

摘要： The present invention provides a method and an apparatus to accurately and consistently distinguish blank sectors from written sectors on optical media despite drive and media variations. A readback envelope threshold is established each time optical media is mounted into an optical drive. In one embodiment, the gain of readback amplifiers are set to a first level, the optical head seeks to and reads a sector or set of sectors on the optical disk known to have information recorded thereon and a first readback envelope generated. The gain of the readback preamplifier is then set to a second level, the optical head seeks to and reads another sector or set of sectors known to have information recorded thereon and a second readback envelope generated. The readback threshold is calculated from the amplitudes of the first and second envelopes. Once the threshold has been calculated for a disk, the drive can scan for a blank sector by comparing the amplitude of the sector's readback envelope with the threshold: if the amplitude is less than the threshold, and no other written format feature is readily indicated the sector can be classified as being blank and it is safe to write to the sector.

摘要翻译： 本发明提供了一种方法和装置，即使驱动器和介质变化，也可准确且一致地区分光学介质上的空白扇区与写入扇区。 每当将光学介质安装到光学驱动器中时，建立回读包络阈值。 在一个实施例中，回读放大器的增益被设置为第一电平，光头寻找并读取光盘上已知具有其上记录的信息的扇区或一组扇区，并产生第一回读包络。 然后将回读前置放大器的增益设置为第二电平，光头寻找并读取已知具有记录信息的另一个扇区或一组扇区，并产生第二个回读包络。 从第一和第二信封的振幅计算回读阈值。 一旦已经为磁盘计算了阈值，驱动器可以通过将扇区的回读包络的幅度与阈值进行比较来扫描空白扇区：如果幅度小于阈值，并且不容易指出其他写入格式特征 部门可以被分类为空白，并且可以安全地写入该部门。

公开(公告)号：US5430702A

公开(公告)日：1995-07-04

申请号：US197525

申请日：1994-02-16

申请人： John E. Bish ,  David E. Call ,  Glen A. Jaquette ,  Judson A. McDowell ,  Arturo A. Mojica ,  Lawrence D. Tipton

发明人： John E. Bish ,  David E. Call ,  Glen A. Jaquette ,  Judson A. McDowell ,  Arturo A. Mojica ,  Lawrence D. Tipton

IPC分类号： G11B7/004 ,  G11B7/00

CPC分类号： G11B7/004

摘要： The present invention provides a method and an apparatus to accurately and consistently distinguish blank sectors from written sectors on optical media despite drive and media variations. A readback envelope threshold is established each time optical media is mounted into an optical drive. In one embodiment, the gain of readback amplifiers are set to a first level, the optical head seeks to and reads a sector or set of sectors on the optical disk known to have information recorded thereon and a first readback envelope generated. The gain off the readback preamplifier is then set to a second level, the optical head seeks to and reads another sector or set of sectors known to have information recorded thereon and a second readback envelope generated. The readback threshold is calculated from the amplitudes of the first and second envelopes. Once the threshold has been calculated for a disk, the drive can scan for a blank sector by comparing the amplitude of the sector's readback envelope with the threshold: if the amplitude is less than the threshold and no other written format feature is readily indicated, the sector can be classified as being blank and it is safe to write to the sector.

摘要翻译： 本发明提供了一种方法和装置，即使驱动器和介质变化，也可准确且一致地区分光学介质上的空白扇区与写入扇区。 每当将光学介质安装到光学驱动器中时，建立回读包络阈值。 在一个实施例中，回读放大器的增益被设置为第一电平，光头寻找并读取光盘上已知具有其上记录的信息的扇区或一组扇区，并产生第一回读包络。 然后将回读前置放大器的增益设置为第二级，光头寻求并读取已知具有记录在其上的信息的另一扇区或一组扇区，并产生第二回读包络。 从第一和第二信封的振幅计算回读阈值。 一旦为磁盘计算了阈值，驱动器可以通过将扇区的回读包络的幅度与阈值进行比较来扫描空白扇区：如果幅度小于阈值，并且不容易指出其他写入格式特征， 部门可以被分类为空白，并且可以安全地写入该部门。

公开(公告)号：US5247498A

公开(公告)日：1993-09-21

申请号：US714946

申请日：1991-06-13

申请人： Makoto Takekoshi ,  Lawrence D. Tipton

发明人： Makoto Takekoshi ,  Lawrence D. Tipton

IPC分类号： G11B21/08 ,  G11B7/085

CPC分类号： G11B7/0857 ,  G11B7/08505 ,  G11B7/08529

摘要： The invention calculates the number of track crossing signals to be counted until a target position is reached without an actual seek operation, thus making it possible to complete a seek operation in a short time and without the need of the additional seek operation disclosed in the related art. A memory means is provided for storing the relation between the number of tracks (Delta t) from a current position to a target position and an indicator of the movement of said optical head toward said target position. A control means is provided for calculating the number of track crossing signals to be counted during a seek operation based on said stored relation when the target position is given, and for generating a control signal causing said optical head to seek based on the number of the calculated track crossing signals.

公开(公告)号：US5268893A

公开(公告)日：1993-12-07

申请号：US779440

申请日：1991-10-18

申请人： David E. Call ,  Lawrence D. Tipton

发明人： David E. Call ,  Lawrence D. Tipton

IPC分类号： G11B7/00 ,  G11B7/0045 ,  G11B7/0055 ,  G11B7/125 ,  G11B11/10 ,  G11B11/105

CPC分类号： G11B7/126

摘要： Calibration of the write signal power level applied to a transducer for marking a moving media to optimize a later recovered read-back signal is provided. An optimized read-back signal is one where the peak-to-peak amplitude of the read-back signal is maximized. The method provides marking test patterns on the recording media at a plurality of discrete, selected write signal power levels of the marking source, developing a read-back signal from the test pattern marks, correlating portions of the read-back signal with the write signal power levels and solving a relationship of the formW.sub.c =W.sub.o -KB.sub.2 /2B.sub.3where W.sub.c is the calibrated write signal power level W.sub.o is an offset write signal power level. K is a minimum differential between write signal power levels B.sub.2 and B.sub.3 are parameters derived from a least squares fit of a second order polynomial equation to data provided by correlating read-back signals with write signal power levels.

摘要翻译： 提供了应用于用于标记移动介质以优化稍后恢复的读回信号的传感器的写入信号功率电平的校准。 优化的回读信号是回读信号的峰 - 峰幅度最大化的信号。 该方法在标记源的多个离散的，选择的写入信号功率电平下在记录介质上提供标记测试图案，从测试图案标记开发回读信号，将回读信号的部分与写入信号相关联 功率级别并解决Wc = Wo-KB2 / 2B3形式的关系，其中Wc是校准写入信号功率电平Wo是偏移写入信号功率电平。 K是写入信号功率电平B2和B3之间的最小差值是从二阶多项式方程的最小二乘拟合导出的数据与通过将读回信号与写入信号功率电平相关联而提供的数据的参数。

公开(公告)号：US5134602A

公开(公告)日：1992-07-28

申请号：US589135

申请日：1990-09-27

申请人： Francisco A. Baca ,  Alan A. Fennema ,  Reed A. Hancock ,  Glen A. Jaquette ,  Lawrence D. Tipton ,  Daniel J. Winarski

发明人： Francisco A. Baca ,  Alan A. Fennema ,  Reed A. Hancock ,  Glen A. Jaquette ,  Lawrence D. Tipton ,  Daniel J. Winarski

IPC分类号： G11B7/00 ,  G11B7/0037 ,  G11B7/004 ,  G11B7/09 ,  G11B7/125 ,  G11B11/105 ,  G11B19/04 ,  G11B19/28 ,  G11B27/36 ,  G11B33/10

CPC分类号： G11B7/126 ,  G11B11/10595 ,  G11B19/04 ,  G11B19/28 ,  G11B27/36 ,  G11B33/10 ,  G11B7/0037 ,  G11B7/0945

摘要： This disclosure deals with an optical disk recorder/player (drive) of the type that receives a removable disk for signal exchanging operations. Once a disk is inserted into the drive, the rotation of the disk begins a period of accelerating rotational speed called spin up. During spin up, the focus and tracking systems of the drive are calibrated. Once the disks reach a desired operating rotational speed, a menu is provided for determining when to calibrate a laser in the drive for recording operations. Such writing or recording calibration of the laser occurs at different times in accordance with the types of signal processing functions to be performed with respect to the particular disk. Description includes a media library in which a plurality of optical disk drives are controlled in a manner for minimizing access times to any optical disk within the media library.

公开(公告)号：US06577562B2

公开(公告)日：2003-06-10

申请号：US09824158

申请日：2001-04-02

申请人： Frank David Gallo ,  Lawrence D. Tipton

发明人： Frank David Gallo ,  Lawrence D. Tipton

IPC分类号： G11B2108

CPC分类号： G11B15/689 ,  G11B17/228

摘要： A method to return an automated data storage and retrieval system from a reset state to the ready state. An automated data storage and retrieval system which includes a computer useable medium having computer readable program code disposed therein to implement Applicants' method to return the automated data storage and retrieval system to the ready state from a reset state. A method to allocate storage elements disposed within an automated data storage and retrieval system while that automated data storage and retrieval system is in a reset state. An automated data storage and retrieval system which includes computer readable program code disposed therein to implement Applicants' method to allocate storage elements disposed within an automated data storage and retrieval system while that automated data storage and retrieval system is in a reset state. A method to adjust the system recovery period of an automated data storage and retrieval system after that system is placed in a reset state. An automated data storage and retrieval system which includes a computer useable medium having computer readable program code disposed therein to implement Applicants' method to adjust the system recovery period of an automated data storage and retrieval system after that system is placed in a reset state.