公开(公告)号：EP1679597A2

公开(公告)日：2006-07-12

申请号：EP05105272.8

申请日：2005-06-15

申请人： Hitachi Global Storage Technologies B. V.

发明人： Cideciyan, Roy D. ,  Eleftheriou, Evangelos S. ,  Galbraith, Richard Leo ,  Mittelholzer, Thomas ,  Oenning, Travis

IPC分类号： G06F11/08

CPC分类号： H03M7/04 ,  G06F11/08 ,  G11B20/1426 ,  G11B2020/1473 ,  H03M5/145 ,  H03M7/06 ,  H03M13/31

摘要： Techniques are provided for applying modulation constraints to data by using periodically changing symbol mappings to replace certain prohibited error prone data patterns. Initially, user data in a first base is mapped to integers of a second base using a base conversion technique. The integers in the second base correspond to symbols. Subsequently, periodically changing symbol mappings are performed during which prohibited symbols generated during base conversion are mapped to permitted symbols. The periodically changing symbol mappings occur in multiple phases, and the prohibited symbols are different in each phase. The resulting data is processed by a precoder in some embodiments.

摘要翻译： 提供了通过使用周期性变化的符号映射来替代某些禁止的易错数据模式来向数据应用调制约束的技术。 最初，使用基本转换技术将第一基站中的用户数据映射到第二基站的整数。 第二个碱基中的整数对应于符号。 随后，执行周期性地改变的符号映射，其中在基本转换期间产生的禁止符号被映射到允许的符号。 周期性变化的符号映射发生在多个阶段，禁止符号在每个阶段都不同。 在一些实施例中，所生成的数据由预编码器处理。

公开(公告)号：EP1679597A3

公开(公告)日：2009-01-28

申请号：EP05105272.8

申请日：2005-06-15

申请人： Hitachi Global Storage Technologies B. V.

发明人： Cideciyan, Roy D. ,  Eleftheriou, Evangelos S. ,  Galbraith, Richard Leo ,  Mittelholzer, Thomas ,  Oenning, Travis

IPC分类号： G06F11/08

CPC分类号： H03M7/04 ,  G06F11/08 ,  G11B20/1426 ,  G11B2020/1473 ,  H03M5/145 ,  H03M7/06 ,  H03M13/31

摘要： Techniques are provided for applying modulation constraints to data by using periodically changing symbol mappings to replace certain prohibited error prone data patterns. Initially, user data in a first base is mapped to integers of a second base using a base conversion technique. The integers in the second base correspond to symbols. Subsequently, periodically changing symbol mappings are performed during which prohibited symbols generated during base conversion are mapped to permitted symbols. The periodically changing symbol mappings occur in multiple phases, and the prohibited symbols are different in each phase. The resulting data is processed by a precoder in some embodiments.