WO1998044633A3 - Maximum transition run length code - Google Patents

Maximum transition run length code Download PDF

Info

Publication number
WO1998044633A3
WO1998044633A3 PCT/US1998/006289 US9806289W WO9844633A3 WO 1998044633 A3 WO1998044633 A3 WO 1998044633A3 US 9806289 W US9806289 W US 9806289W WO 9844633 A3 WO9844633 A3 WO 9844633A3
Authority
WO
WIPO (PCT)
Prior art keywords
code
bit locations
run length
length code
maximum transition
Prior art date
Application number
PCT/US1998/006289
Other languages
French (fr)
Other versions
WO1998044633A2 (en
Inventor
Kinhing P Tsang
Bernardo Rub
Original Assignee
Seagate Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Seagate Technology filed Critical Seagate Technology
Priority to KR1019997008982A priority Critical patent/KR20010005905A/en
Priority to GB9923044A priority patent/GB2338629B/en
Priority to JP54191698A priority patent/JP2001518253A/en
Priority to DE19882278T priority patent/DE19882278T1/en
Publication of WO1998044633A2 publication Critical patent/WO1998044633A2/en
Publication of WO1998044633A3 publication Critical patent/WO1998044633A3/en

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction
    • H03M7/46—Conversion to or from run-length codes, i.e. by representing the number of consecutive digits, or groups of digits, of the same kind by a code word and a digit indicative of that kind
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M5/00—Conversion of the form of the representation of individual digits
    • H03M5/02—Conversion to or from representation by pulses
    • H03M5/04—Conversion to or from representation by pulses the pulses having two levels
    • H03M5/14—Code representation, e.g. transition, for a given bit cell depending on the information in one or more adjacent bit cells, e.g. delay modulation code, double density code

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

A method and apparatus for encoding data (152) produces a code stream (153) of code words (190, 192, 194) where each code word includes two subsets of code bits. Each subset of code bits is constrained by a different maximum transition run constraint. In an alternative embodiment, the method and apparatus produces a code stream (153) comprised of alternating even bit locations (188) and odd bit locations (186), where the even bit locations are constrained by a different maximum run length constraint than the odd bit locations.
PCT/US1998/006289 1997-04-01 1998-03-31 Maximum transition run length code WO1998044633A2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
KR1019997008982A KR20010005905A (en) 1997-04-01 1998-03-31 System and scheme for maximum transition run length codes with location dependent constraints
GB9923044A GB2338629B (en) 1997-04-01 1998-03-31 System and scheme for maximum transition run length codes with location dependent constraints
JP54191698A JP2001518253A (en) 1997-04-01 1998-03-31 System and method for maximum transition run-length code with position-dependent constraints
DE19882278T DE19882278T1 (en) 1997-04-01 1998-03-31 System and scheme for maximum transition run length codes with location-dependent restrictions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US4251897P 1997-04-01 1997-04-01
US60/042,518 1997-04-01

Publications (2)

Publication Number Publication Date
WO1998044633A2 WO1998044633A2 (en) 1998-10-08
WO1998044633A3 true WO1998044633A3 (en) 1998-12-23

Family

ID=21922364

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1998/006289 WO1998044633A2 (en) 1997-04-01 1998-03-31 Maximum transition run length code

Country Status (5)

Country Link
JP (1) JP2001518253A (en)
KR (1) KR20010005905A (en)
DE (1) DE19882278T1 (en)
GB (1) GB2338629B (en)
WO (1) WO1998044633A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7620116B2 (en) 2003-02-28 2009-11-17 Rambus Inc. Technique for determining an optimal transition-limiting code for use in a multi-level signaling system
JP4536412B2 (en) * 2004-04-12 2010-09-01 富士通株式会社 Recording / reproducing apparatus and signal processing circuit

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553169A (en) * 1990-01-22 1996-09-03 Matsushita Electric Industrial Co., Ltd. Position detecting device using run position and run length of normalized projection data

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553169A (en) * 1990-01-22 1996-09-03 Matsushita Electric Industrial Co., Ltd. Position detecting device using run position and run length of normalized projection data

Also Published As

Publication number Publication date
WO1998044633A2 (en) 1998-10-08
GB2338629B (en) 2001-10-24
GB2338629A (en) 1999-12-22
GB9923044D0 (en) 1999-12-01
KR20010005905A (en) 2001-01-15
DE19882278T1 (en) 2000-03-30
JP2001518253A (en) 2001-10-09

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