公开(公告)号：US06768603B2

公开(公告)日：2004-07-27

申请号：US09799492

申请日：2001-03-07

申请人： Roy Daron Cideciyan ,  Evangelos Stavros Eleftheriou ,  Brian Harry Marcus ,  Dharmendra Shantilal Modha ,  Radley Wahl Olson

发明人： Roy Daron Cideciyan ,  Evangelos Stavros Eleftheriou ,  Brian Harry Marcus ,  Dharmendra Shantilal Modha ,  Radley Wahl Olson

IPC分类号： G11B509

CPC分类号： G11B20/10194 ,  G11B5/09 ,  G11B20/1426 ,  H03M5/145 ,  H03M7/46

摘要： A method for write-precompensating a waveform for magnetically recording a waveform on a magnetic medium is disclosed. A user data stream is encoded into an encoded data stream so that the encoded data stream has no tribits and no consecutive dibits. No delay is applied to a first transition of a dibit of the encoded data stream. An isolated transition of the encoded data stream is delayed by a first predetermined amount of time. The second transition of a dibit of the encoded data stream is delayed by a second predetermined amount of time, such that the second predetermined amount of time is substantially twice the first predetermined amount of time. Preferably, the encoded data stream satisfies a predetermined run length limited (RLL) k− constraint of k=13 and a predetermined twins t-constraint of t=15. In one embodiment, the encoded data stream is encoded by a block code at rate 8:10. In another embodiment, the encoded data stream is encoded by a block code at rate 16:19.

摘要翻译： 公开了一种在磁介质上磁记录波形的波形的预补偿方法。 用户数据流被编码成编码的数据流，使得编码的数据流不具有三位并且没有连续的二进制数。 对于编码数据流的二进制的第一转换，不施加延迟。 编码数据流的隔离转换被延迟第一预定时间量。 编码数据流的二进制的第二次转变被延迟第二预定时间量，使得第二预定时间量基本上是第一预定时间量的两倍。 优选地，编码数据流满足k = 13的预定游程长度限制（RLL）k约束和t = 15的预定双胞胎t约束。 在一个实施例中，编码数据流由速率8:10的块代码编码。 在另一个实施例中，编码数据流由速率16:19的块代码编码。

公开(公告)号：US06288858B1

公开(公告)日：2001-09-11

申请号：US09328291

申请日：1999-06-09

申请人： Patrick Clinton Arnett ,  David Cheekit Cheng ,  Radley Wahl Olson

发明人： Patrick Clinton Arnett ,  David Cheekit Cheng ,  Radley Wahl Olson

IPC分类号： G11B509

CPC分类号： G11B5/09 ,  G11B5/012 ,  G11B20/10009

摘要： A method and a device for write precompensating a data pattern for recording the pattern on a magnetic storage medium at high data rates. A first predetermined write-precompensation delay is applied to the second transition of a burst of transitions of the data pattern. A second predetermined write-precompensation delay is applied to the last transition of a burst. A third predetermined write-precompensation delay is applied to the middle transitions, if any, of a burst. When the burst is a dibit, the application of the second and third predetermined write-precompensation delays is omitted and the first predetermined write-precompensation delay is based on the burst being a dibit. When the burst is a tribit, the application of the second predetermined write-precompensation delay is omitted and the first and third predetermined write-precompensation delays are based on the burst being a tribit. A fourth predetermined write-precompensation delay is applied to the transitions in the data pattern that are not part of a burst of transitions.

摘要翻译： 一种用于以高数据速率对磁性存储介质上的图案进行记录的数据模式进行预补给的方法和装置。 第一预定的写预补偿延迟被施加到数据模式的转变脉冲串的第二转变。 第二预定的写预补偿延迟被施加到突发的最后一个转换。 第三预定的写预补偿延迟被应用于突发的中间转换（如果有的话）。 当突发是双位时，省略了第二和第三预定写预补偿延迟的应用，并且第一预定写预补偿延迟基于突发是双位。 当突发是三部分时，省略了第二预定写预补偿延迟的应用，并且第一和第三预定写预补偿延迟基于作为三位的突发。 第四预定的写预补偿延迟被应用于数据模式中不是转换突发的一部分的转换。