Combi-codes for DC-free runlength-limited coding

Author

Coene, Wim

Author_Institution

Philips Res. Lab., Eindhoven, Netherlands

Volume

46

Issue

4

fYear

2000

fDate

11/1/2000 12:00:00 AM

Firstpage

1082

Lastpage

1087

Abstract

We present a new coding scheme for DC-free runlength-limited (RLL) codes. This scheme is based on the combination of two codes, a main code and a substitution code, both operating on symbols of a fixed length n. The substitution code has a special structure, i.e., for each n-bit symbol, there are two possible channel words, which have opposite parity and the same next-state in the underlying finite-state machine (FSM). The advantages of this systematic structure of the code are: guaranteed DC-control, ECC-symbol oriented coding, and low-complexity look-ahead DC-control encoding. A design for an efficient combi-code for both for EFM-like RLL constraints (d=2, k=10) and for (d=1, k=7) RLL constraints, is outlined

Keywords

channel coding; runlength codes; DC-free RLL codes; DC-free runlength-limited coding; ECC-symbol oriented coding; EFM-like RLL constraints; FSM; RLL constraints; channel codes; channel words; combi-codes; finite-state machine; fixed length symbols; look-ahead DC-control encoding; low-complexity DC-control encoding; substitution code; Control systems; Frequency; Interference; Laboratories; Low-frequency noise; Merging; Noise level; Optical noise; Optical recording; Servomechanisms;

fLanguage

English

Journal_Title

Consumer Electronics, IEEE Transactions on

Publisher

ieee

ISSN

0098-3063

Type

jour

DOI

10.1109/30.920465

Filename

920465