GB2338628A - Maximum transition run length code - Google Patents

Maximum transition run length code

Info

Publication number
GB2338628A
GB2338628A GB9923042A GB9923042A GB2338628A GB 2338628 A GB2338628 A GB 2338628A GB 9923042 A GB9923042 A GB 9923042A GB 9923042 A GB9923042 A GB 9923042A GB 2338628 A GB2338628 A GB 2338628A
Authority
GB
United Kingdom
Prior art keywords
maximum transition
transition run
bit locations
run length
length code
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
GB9923042A
Other versions
GB9923042D0 (en
GB2338628B (en
Inventor
Kinhing Paul Tsang
Bernardo Rub
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Seagate Technology LLC
Original Assignee
Seagate Technology LLC
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 LLC filed Critical Seagate Technology LLC
Publication of GB9923042D0 publication Critical patent/GB9923042D0/en
Publication of GB2338628A publication Critical patent/GB2338628A/en
Application granted granted Critical
Publication of GB2338628B publication Critical patent/GB2338628B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • 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
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • 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
    • 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
    • H03M5/145—Conversion to or from block codes or representations thereof

Landscapes

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

Abstract

An encoder (150) and a method of encoding successive data words (152) into successive code words (153, 180, 181, 182) having alternating code word lengths (260, 262). Each code word (153, 180, 181, 182) has a plurality of bit locations. A first maximum transition run constraint (M) is imposed on a first set of the bit locations, wherein each bit location in the first set is spaced S (266) bit locations apart from one another, and S (266) is an integer greater than one. A second maximum transition run constraint (N), which is different than the first maximum transition run constraint, is imposed on a second set of the bit locations, wherein the second set comprises each of the bit locations that are not in the first set. The alternating code word lengths (260, 262) and the value of S (266) are defined such that corresponding bit locations in successive code words (153, 180, 181, 182) have the same maximum transition run constraint.
GB9923042A 1997-04-01 1998-03-31 Maximum transition run length code Expired - Fee Related GB2338628B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US4251897P 1997-04-01 1997-04-01
US7572398P 1998-02-24 1998-02-24
PCT/US1998/006321 WO1998044636A1 (en) 1997-04-01 1998-03-31 Maximum transition run length code

Publications (3)

Publication Number Publication Date
GB9923042D0 GB9923042D0 (en) 1999-12-01
GB2338628A true GB2338628A (en) 1999-12-22
GB2338628B GB2338628B (en) 2002-02-20

Family

ID=26719328

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9923042A Expired - Fee Related GB2338628B (en) 1997-04-01 1998-03-31 Maximum transition run length code

Country Status (5)

Country Link
JP (1) JP2001518254A (en)
KR (1) KR100552944B1 (en)
DE (1) DE19882279T1 (en)
GB (1) GB2338628B (en)
WO (1) WO1998044636A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100472524B1 (en) * 1999-06-30 2005-03-09 시게이트 테크놀로지 엘엘씨 Partial response channel having combined mtr and parity constraints

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
KR20010005906A (en) 2001-01-15
JP2001518254A (en) 2001-10-09
DE19882279T1 (en) 2000-02-24
KR100552944B1 (en) 2006-02-22
GB9923042D0 (en) 1999-12-01
WO1998044636A1 (en) 1998-10-08
GB2338628B (en) 2002-02-20

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20070331