公开(公告)号：US4882721A

公开(公告)日：1989-11-21

申请号：US163156

申请日：1988-02-24

申请人： Roger R. Bracht ,  Johannes J. Verboom

发明人： Roger R. Bracht ,  Johannes J. Verboom

IPC分类号： G11B7/0045 ,  G11B7/005 ,  G11B20/14 ,  G11B27/36

CPC分类号： G11B7/005 ,  G11B20/1426 ,  G11B27/36 ,  G11B7/0045

摘要： Provided is a read signal offset during write verify which prevents the false detection of amorphous pips from an optical disk recorder. Amorphous pips are the signals caused by the drop in reflection from an optical disk after the laser has caused the surface material to change from its crystalline state to an amorphous state, but not to a hole. When a hole is not formed in the material, the amorphous material later recrystallizes, the drop in reflection no longer occurs and information is lost.

摘要翻译： 提供了在写入验证期间的读取信号偏移，其防止来自光盘记录器的非法点的错误检测。 非晶点是在激光使表面材料从其结晶状态转变为非晶状态而不是孔之后由光盘的反射下降引起的信号。 当材料中未形成孔时，非晶态材料随后再结晶，反射下降不再发生，信息丢失。

公开(公告)号：US4855742A

公开(公告)日：1989-08-08

申请号：US119463

申请日：1987-11-09

申请人： Johannes J. Verboom

发明人： Johannes J. Verboom

IPC分类号： H04L25/49 ,  H03M5/14 ,  H03M7/30

CPC分类号： H03M5/145

摘要： An information-transmission system including an encoder for converting n-bit information words (D7, . . . , D0) into transmitted m-bit code words (C10, . . . , C0), and a decoder which reconverts the received code words (C'10, . . . , C'0) into information words (D*7, . . . , D*0) corresponding to the original information words. For a first group the encoder converts a first portion (D7, . . . , D3) into a first portion of a code word, such portion comprising q bits (C10, . . . , C5) thereof; and converts a second portion (D2, . . . , D0) of the information word into a second portion of the code word, such portion comprising s bits (C4, . . . , C0) thereof. For a second group the encoder converts a first portion (D7, . . . , D3) into a second portion comprising q bits (C'5, . . . , C'0) of a code word, and converts a second portion (D2, . . . , D0) of the information word into a first portion comprising s-bits of (C'10, . . . , C'6) such code word. The decoder reconverts a received code word by converting the first portion of such code word (C'10, . . . , C'5) into the first portion (D*7, . . . , D*3) of the information word to be reconverted therefrom; and converts the second portion of such code word (C'4, . . . , C'0) into the second portion of such information word (D*2, . . . , D*0). The decoder converts a received code word in the second group of information words by converting the first portion of such code word (C'5, . . . , C'0) into the second portion (D*7, . . . , D*3) of the information word to be reconverted, and converts the second portion of such code word (C'10, . . . , C'6) into the first portion of such information word (D*2, . . . , D*0).

公开(公告)号：US07248557B2

公开(公告)日：2007-07-24

申请号：US10749163

申请日：2003-12-30

申请人： Johannes J. Verboom ,  John C. Rathe

发明人： Johannes J. Verboom ,  John C. Rathe

IPC分类号： G11B7/24

CPC分类号： G11B27/3027 ,  G11B7/00745 ,  G11B27/19 ,  G11B27/24 ,  G11B2220/20

摘要： For the purpose of providing sector-address information on optical disks, a robust header is realized by utilizing a very simple encoding method that allows asynchronous reading. In order to provide robustness and reliability, the header uses a biphase data format to encode addressing information. The embossed header is further configured with redundant address-fields in a checkerboard pattern between adjacent tracks, in order to provide robustness for media-contamination. Each address-field starts with a unique address-mark and ends with parity-check information to provide reliable error-detection. The entire header can be decoded without the need for a slice-level, thus making it very tolerant to amplitude-variations and DC-offset variations. By combining these characteristics, a header is achieved which is reliable and inherently resistant to failures in providing sector-address information on optical disks.

摘要翻译： 为了在光盘上提供扇区地址信息，通过使用允许异步读取的非常简单的编码方法来实现鲁棒报头。 为了提供鲁棒性和可靠性，报头使用双相数据格式来编码寻址信息。 压印头还被配置有相邻轨道之间棋盘图案中的冗余地址字段，以便为媒体污染提供鲁棒性。 每个地址字段以唯一的地址标记开始，并以奇偶校验信息结束，以提供可靠的错误检测。 整个报头可以被解码而不需要一个片级，因此使得它非常容忍幅度变化和直流偏移变化。 通过组合这些特征，实现了一种头部，其可靠并且固有地抵抗在光盘上提供扇区地址信息的故障。

公开(公告)号：US06236627B1

公开(公告)日：2001-05-22

申请号：US09213526

申请日：1998-12-17

申请人： Johannes J. Verboom

发明人： Johannes J. Verboom

IPC分类号： G11B700

CPC分类号： G11B7/00745 ,  G11B7/0938

摘要： An optical recording medium having a number of adjacent tracks for storing digital optical information is provided, such as an optical disc. The tracks extend in a tangential direction, for example, surrounding the center of the disc. Each track is separated by a pitch amount in a radial direction, for example, outward from the center across the tracks. The tracks each have a servo field comprising one tracking mark located on the track in one of four discrete tangential positions A, B, C and D on the track. There is a mark in one of these four positions for every four adjacent tracks on the media. The position of the tracking marks repeat in the same sequence for every four adjacent tracks. For any four such adjacent tracks, the tracks having marks at positions A and B are separated by one track, and tracks having marks at positions C and D are separated by one track.

摘要翻译： 提供了具有用于存储数字光学信息的多个相邻轨道的光学记录介质，诸如光盘。 轨道沿切线方向延伸，例如围绕盘的中心。 每个轨道在径向方向上例如从中心穿过轨道向外分开间距量。 轨道各具有伺服字段，该伺服字段包括轨道上位于轨道上的四个离散切向位置A，B，C和D之一中的一个跟踪标记。 媒体上每四个相邻轨道的这四个位置中有一个标记。 跟踪标记的位置对于每四个相邻的轨道以相同的顺序重复。 对于任何四个这样的相邻轨道，具有在位置A和B处的标记的轨迹被一个轨道分开，并且在位置C和D处具有标记的轨迹被一个轨道分开。

公开(公告)号：US6091687A

公开(公告)日：2000-07-18

申请号：US994874

申请日：1997-12-19

申请人： Johannes J. Verboom ,  Fred N. Wamble

发明人： Johannes J. Verboom ,  Fred N. Wamble

IPC分类号： G11B7/005 ,  G11B20/10 ,  G11B7/00

CPC分类号： G11B20/10527

摘要： A method and apparatus for recovering data from an optical read channel provides for improved recording density by tolerating lower phase and amplitude margins. The method includes digitizing a plurality of samples of a first signal, clipping the digitized samples of the first signal, digitally differentiating the clipped digitized samples, determining the relative locations of signal polarity changes, and generating logical values for channel bits based, at least in part, on the relative locations of signal polarity changes. The apparatus for recovering data from an optical read channel includes a signal-level limiter, a digital differentiator coupled to the signal-level limiter, a min/max detector coupled to the digital differentiator, a zero-crossing detector coupled to the digital differentiator, an update signal generator coupled to the zero-crossing detector and the min/max detector, and a channel bit transition generator.

摘要翻译： 用于从光学读取通道恢复数据的方法和装置通过容忍较低的相位和幅度余量来提供改进的记录密度。 该方法包括数字化第一信号的多个样本，限幅第一信号的数字化样本，数字地区分限幅数字化采样，确定信号极性变化的相对位置，以及生成信道位的逻辑值，至少基于 部分，对相对位置的信号极性变化。 用于从光学读取通道恢复数据的装置包括信号电平限制器，耦合到信号电平限制器的数字微分器，耦合到数字微分器的最小/最大检测器，耦合到数字微分器的过零检测器， 耦合到过零检测器和最小/最大检测器的更新信号发生器，以及通道位转换发生器。

公开(公告)号：US4914645A

公开(公告)日：1990-04-03

申请号：US147690

申请日：1988-01-25

申请人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis ,  Gregory V. Hofer ,  Kathleen M. Connelly ,  James C. McDonald ,  Pierre R. Sonneville ,  Cees van Nimwegen

发明人： Kurt W. Getreuer ,  Johannes J. Verboom ,  David L. Schell ,  David E. Lewis ,  Gregory V. Hofer ,  Kathleen M. Connelly ,  James C. McDonald ,  Pierre R. Sonneville ,  Cees van Nimwegen

IPC分类号： G11B7/24 ,  G11B7/00 ,  G11B7/004 ,  G11B7/0065 ,  G11B7/007 ,  G11B7/013 ,  G11B7/085 ,  G11B7/09

CPC分类号： G11B7/0938 ,  G11B7/085 ,  G11B7/0901 ,  G11B7/24085

摘要： An optical disk recording system including a record medium is disclosed for providing an accurate track crossing count and an accurate track following signal. A first embodiment utilizes off-centered wobbled areas located in the headers of the record medium. The high frequency content of a first signal is combined with the low frequency content of a second signal, which is generated using the wobbled areas. In another embodiment, light-reflective discontinuities are provided in the header areas of the record medium. A qualifier and an AGC are utilized in providing a corrected track following signal. In still another embodiment, reflective discontinuities are located in the servo areas of the record medium. In such an embodiment, it is preferred that there is a fixed gain adjustment to a radial push-pull signal. With regard to each of the three aforesaid embodiments, a track following signal is corrected to compensate for aberrations that are caused by a shift of the light beam returned from the record medium surface. In yet another embodiment, the track following signal is generated using only the central aperture or wobble signal. In this embodiment, it is preferred that three pits be utilized in connection with the track following operation. The three pits are provided in two servo bytes of information located in the servo areas. Two of the three pits are wobble pits and the third pit is used in clocking.

摘要翻译： 公开了一种包括记录介质的光盘记录系统，用于提供准确的轨道交叉计数和准确跟踪信号。 第一实施例使用位于记录介质的头部中的偏心摆动区域。 第一信号的高频内容与使用摆动区域产生的第二信号的低频内容组合。 在另一个实施例中，在记录介质的标题区域中提供光反射不连续性。 使用限定符和AGC来提供校正后的跟踪信号。 在另一个实施例中，反射不连续性位于记录介质的伺服区域中。 在这样的实施例中，优选的是对径向推挽信号进行固定增益调整。 对于上述三个实施例中的每一个，对跟踪跟踪信号进行校正，以补偿由从记录介质表面返回的光束的偏移引起的像差。 在另一个实施例中，仅使用中心孔径或摆动信号产生跟踪信号。 在该实施例中，优选地，跟踪跟踪操作结合使用三个凹坑。 三个凹坑位于伺服区域的两个伺服字节的信息中。 三个凹坑中的两个是摆动凹坑，第三个凹坑用于计时。

公开(公告)号：US4740944A

公开(公告)日：1988-04-26

申请号：US52773

申请日：1987-05-21

申请人： Johannes J. Verboom

发明人： Johannes J. Verboom

IPC分类号： G11B20/14 ,  G11B7/00

CPC分类号： G11B20/1403

摘要： The read signal input to the phase lock loop, which tracks the prerecorded clock of an optical disk digital recording and playback system, is first filtered using a comb filter to reduce effects caused by the loss of the prerecorded clock signal due to data holes which erase the prerecorded clock and cause relatively large and long lasting, unipotential read signals.

摘要翻译： 首先使用梳状滤波器来对跟踪光盘数字记录和重放系统的预先记录的时钟的锁相环输入的锁存信号的读取信号进行滤波，以减少因预先记录的时钟信号的损失而引起的影响， 预录时钟并引起相对较大且持久的单相读信号。

公开(公告)号：US4718054A

公开(公告)日：1988-01-05

申请号：US869012

申请日：1986-05-28

申请人： David L. Schell ,  Henk A. Van der Put ,  Johannes J. Verboom

发明人： David L. Schell ,  Henk A. Van der Put ,  Johannes J. Verboom

IPC分类号： G11B7/09 ,  G11B19/04 ,  G11B3/82 ,  G11B21/10

CPC分类号： G11B19/04 ,  G11B7/09

摘要： A blanking circuit used with an optical recording disk system for eliminating the effect of far field shift during high laser power writing on a disk. The circuit provides a differential output one-shot that is fired for a time long enough for write pulse transients to be gone from photo diodes in a light detector before the circuit switches are returned to a read mode.

摘要翻译： 与光记录盘系统一起使用的消隐电路，用于消除在高激光功率写入期间在磁盘上的远场偏移的影响。 该电路提供了一个差分输出单稳态触发的时间足以使电路开关返回到读模式之前的写入脉冲瞬变从光检测器中的光电二极管消失。

公开(公告)号：US4606016A

公开(公告)日：1986-08-12

申请号：US578152

申请日：1984-02-08

申请人： Johannes J. Verboom ,  Roger R. Bracht

发明人： Johannes J. Verboom ,  Roger R. Bracht

IPC分类号： G11B7/00 ,  G11B7/005 ,  G11B20/14 ,  G11B27/36 ,  G11B3/90

CPC分类号： G11B20/1426 ,  G11B27/36 ,  G11B7/00 ,  G11B7/005

摘要： Disclosed is an apparatus for detection of write protect data written on an optical disk by simultaneously reading the data during writing using differential detection and disabling further writing if write protect data is present. The write protect data is the same format as other data written on the optical disk and is written as the first byte of data on all data fields. The data is written in a fixed-block format defining a symbol having a predetermined number of symbol positions and a predetermined number of holes which may be written at the symbol positions, an equal number of holes at odd and at even positions. The write protect symbol has holes written at symbol position numbers two and five. During the writing of a write protect symbol, the laser is operated at read power before it is operated at write power and a signal associated with the hole associated power of the reflected beam is sampled at position number eight of the previous symbol and at position number one of the write protect symbol. The hole associated power at position number one will be significant if a hole was previously written at position number two. The read signals at positions one and eight are compared to each other. If the position number one signal exceeds that at number eight by a predetermined differential, a hole was previously recorded at position number two, indicating the presence of a previously written write protect byte of data.The same apparatus is also used to detect the presence of or absence of data in a data sector during read mode.

摘要翻译： 公开了一种用于通过使用差分检测在写入期间同时读取数据来检测写入光盘的写保护数据的装置，并且如果存在写保护数据则禁止进一步写入。 写保护数据与写在光盘上的其他数据格式相同，并作为所有数据字段上的数据的第一个字节写入。 数据以固定块格式写入，定义具有预定数量的符号位置的符号和可以写在符号位置的预定数量的孔，在奇数和偶数位置处具有相等数量的孔。 写保护符号有两个和五个符号位置编号的孔。 在写入写保护符号期间，激光器在以写功率操作之前以读功率操作，并且与反射光束的孔相关功率相关联的信号在先前符号的位置号码八处和位置号 写保护符号之一。 如果先前在位置2处写入孔，则位置1处的孔相关功率将是重要的。 将位置1和8处的读取信号彼此进行比较。 如果位置号码一号信号超过了八号预定的差分，则在位置号码2处先前记录一个孔，表示存在一个先前写入的数据写保护字节。 同样的装置也用于在读取模式期间检测数据扇区中是否存在数据。

公开(公告)号：US4599717A

公开(公告)日：1986-07-08

申请号：US578148

申请日：1984-02-08

申请人： Rodger R. Bracht ,  Johannes J. Verboom

发明人： Rodger R. Bracht ,  Johannes J. Verboom

IPC分类号： G11B20/10 ,  G11B7/00 ,  G11B7/005 ,  G11B19/04 ,  G11B20/18 ,  G11B27/36

CPC分类号： G11B7/005 ,  G11B19/04 ,  G11B20/1879 ,  G11B27/36 ,  G11B7/00

摘要： Disclosed is an apparatus for verifying data written on an optical disk by simultaneously reading the data during writing and using differential detection to verify that the data has been written correctly. The data is written in a fixed-block format defining a symbol having a predetermined number of symbol positions and a predetermined number of holes which may be written in the symbol positions, an equal number of holes in the odd positions and in the even positions. In this regard, the holes written in the odd positions are independently verified from the holes written in the even positions. Immediately after the laser has been operated at write power, it is returned to read power and a signal associated with the hole associated power of the reflected beam is sampled. This signal is compared to the signal power generated at the previous even or odd position. The highest signal is retained and compared to the next even or odd position's signal. At the end of the symbol, the location of the even and odd symbol positions having the highest signal power is determined and compared to the location of the write pulse to determine whether the location of the hole corresponds with the location of the write pulse.

摘要翻译： 公开了一种用于通过在写入期间同时读取数据并使用差分检测来验证数据被写入正确来验证写在光盘上的数据的装置。 数据以固定块格式写入，定义具有预定数量的符号位置的符号和可以写入符号位置的预定数量的孔，在奇数位置和偶数位置中具有相等数量的孔。 在这方面，写入奇数位置的孔是从写在偶数位置的孔独立地进行验证的。 在激光器以写入功率操作之后，立即返回读取功率，并且与反射光束的孔相关联的功率相关联的信号被采样。 该信号与在先前偶数或奇数位置处产生的信号功率进行比较。 保持最高信号并与下一个偶数或奇数位置信号进行比较。 在符号结尾，确定具有最高信号功率的偶和奇符号位置的位置，并与写入脉冲的位置进行比较，以确定孔的位置是否对应于写入脉冲的位置。