Techniques for implementing non-uniform constraints in modulation encoded data

Non-uniform modulation encoding techniques are provided to prevent data from containing bit patterns that are prone to errors during read back. Modulation encoding is performed on a data stream to remove error prone bit patterns. Unconstrained data, such as error check parity, that is inserted into...

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Bibliographic Details
Main Author BLAUM MARIO,CIDECIYAN ROY D.,ELEFTHERIOU EVANGELOS S.,GALBRAITH RICHARD LEO,LAKOVIC KSENIJA,MITTELHOLZER THOMAS,OENNING TRAVIS,WILSON BRUCE A
Format Patent
LanguageEnglish
Published 06.09.2006
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
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Summary:Non-uniform modulation encoding techniques are provided to prevent data from containing bit patterns that are prone to errors during read back. Modulation encoding is performed on a data stream to remove error prone bit patterns. Unconstrained data, such as error check parity, that is inserted into the modulated data stream may contain error prone bit patterns. Stricter modulation constraints are enforced on bits that are next to the unconstrained data, than on the remaining bits. By enforcing stricter modulation constraints on these bits, an entire data bit stream can have a desired modulation constraint.
Bibliography:Application Number: CN200610003602