SG10201406377VA - Normalization factor adaptation for ldpc decoding for hard disk drive systems - Google Patents

Normalization factor adaptation for ldpc decoding for hard disk drive systems

Info

Publication number
SG10201406377VA
SG10201406377VA SG10201406377VA SG10201406377VA SG10201406377VA SG 10201406377V A SG10201406377V A SG 10201406377VA SG 10201406377V A SG10201406377V A SG 10201406377VA SG 10201406377V A SG10201406377V A SG 10201406377VA SG 10201406377V A SG10201406377V A SG 10201406377VA
Authority
SG
Singapore
Prior art keywords
hard disk
disk drive
drive systems
normalization factor
ldpc decoding
Prior art date
Application number
SG10201406377VA
Inventor
Kui Cai
Yibin Ng
Original Assignee
Agency Science Tech & Res
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 Agency Science Tech & Res filed Critical Agency Science Tech & Res
Priority to SG10201406377VA priority Critical patent/SG10201406377VA/en
Publication of SG10201406377VA publication Critical patent/SG10201406377VA/en

Links

Classifications

    • 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
    • H03M13/35—Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
    • H03M13/353—Adaptation to the channel
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/08—Error detection or correction by redundancy in data representation, e.g. by using checking codes
    • G06F11/10—Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
    • G06F11/1076—Parity data used in redundant arrays of independent storages, e.g. in RAID systems
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
    • 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
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • 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
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • H03M13/1105—Decoding
    • H03M13/1111—Soft-decision decoding, e.g. by means of message passing or belief propagation algorithms
    • 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
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/11—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits using multiple parity bits
    • H03M13/1102—Codes on graphs and decoding on graphs, e.g. low-density parity check [LDPC] codes
    • H03M13/1105—Decoding
    • H03M13/1111—Soft-decision decoding, e.g. by means of message passing or belief propagation algorithms
    • H03M13/1117—Soft-decision decoding, e.g. by means of message passing or belief propagation algorithms using approximations for check node processing, e.g. an outgoing message is depending on the signs and the minimum over the magnitudes of all incoming messages according to the min-sum rule
    • 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
    • H03M13/63—Joint error correction and other techniques
    • H03M13/6343—Error control coding in combination with techniques for partial response channels, e.g. recording
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
    • G11B2020/185—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information using an low density parity check [LDPC] code

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Quality & Reliability (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Error Detection And Correction (AREA)
SG10201406377VA 2013-10-07 2014-10-07 Normalization factor adaptation for ldpc decoding for hard disk drive systems SG10201406377VA (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SG10201406377VA SG10201406377VA (en) 2013-10-07 2014-10-07 Normalization factor adaptation for ldpc decoding for hard disk drive systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SG2013075007 2013-10-07
SG10201406377VA SG10201406377VA (en) 2013-10-07 2014-10-07 Normalization factor adaptation for ldpc decoding for hard disk drive systems

Publications (1)

Publication Number Publication Date
SG10201406377VA true SG10201406377VA (en) 2015-05-28

Family

ID=52777969

Family Applications (1)

Application Number Title Priority Date Filing Date
SG10201406377VA SG10201406377VA (en) 2013-10-07 2014-10-07 Normalization factor adaptation for ldpc decoding for hard disk drive systems

Country Status (2)

Country Link
US (1) US9548762B2 (en)
SG (1) SG10201406377VA (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU168191U1 (en) * 2016-10-13 2017-01-23 Общество с ограниченной ответственностью "Силовая электроника" LDPC decoding device

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080096745A (en) * 2006-01-23 2008-11-03 로무 가부시키가이샤 Encoding device, decoding device, amplitude adjusting device, recorded information reading device, signal processing device, and storage system
US8281212B1 (en) * 2007-03-30 2012-10-02 Link—A—Media Devices Corporation Iterative ECC decoder with out of order completion
US8136016B1 (en) * 2007-11-08 2012-03-13 Marvell International Ltd. Split sector recovery method
US8615700B2 (en) * 2009-08-18 2013-12-24 Viasat, Inc. Forward error correction with parallel error detection for flash memories
US8533550B2 (en) * 2010-06-29 2013-09-10 Intel Corporation Method and system to improve the performance and/or reliability of a solid-state drive
US8464137B2 (en) * 2010-12-03 2013-06-11 International Business Machines Corporation Probabilistic multi-tier error correction in not-and (NAND) flash memory
JP5902025B2 (en) * 2012-04-23 2016-04-13 株式会社日立製作所 SERVO PATTERN BY MICROWAVE-ASSISTED MAGNETIC RECORDING, VERTICAL MAGNETIC RECORDING MEDIUM, MAGNETIC STORAGE DEVICE, AND METHOD FOR MANUFACTURING THE SAME
US8938659B2 (en) * 2012-05-04 2015-01-20 Lsi Corporation Low-density parity-check decoder disparity preprocessing
JP5894868B2 (en) * 2012-06-18 2016-03-30 株式会社日立製作所 Microwave assisted magnetic recording system and magnetic storage device
JP5902071B2 (en) * 2012-08-29 2016-04-13 株式会社日立製作所 Magnetic head and magnetic storage device
US8705192B1 (en) * 2012-10-12 2014-04-22 Lsi Corporation Enhanced quality-sorting scheduler
US9214963B1 (en) * 2012-12-21 2015-12-15 Western Digital Technologies, Inc. Method and system for monitoring data channel to enable use of dynamically adjustable LDPC coding parameters in a data storage system
US9059737B2 (en) * 2013-01-11 2015-06-16 HGST Netherlands B.V. Disk drive with distributed codeword blocks
US8908307B1 (en) * 2013-08-23 2014-12-09 Lsi Corporation Systems and methods for hard disk drive region based data encoding
US9312886B2 (en) * 2013-09-20 2016-04-12 Seagate Technology Llc Storage device with multiple coding redundancies
US9317361B2 (en) * 2013-11-27 2016-04-19 Seagate Technology Llc Bit-line defect detection using unsatisfied parity code checks

Also Published As

Publication number Publication date
US9548762B2 (en) 2017-01-17
US20150100855A1 (en) 2015-04-09

Similar Documents

Publication Publication Date Title
EP3049933A4 (en) Improving backup system performance
EP2997475A4 (en) Deduplicated data storage system having distributed manifest
GB2519664B (en) Hard disk drive with feedthrough connector
EP2695065A4 (en) Data deduplication
EP3084646A4 (en) Media service
EP3090304A4 (en) Conditional retrieval
HK1200928A1 (en) Shockproof centre wheel
IL235650A0 (en) Dual run cassette
EP3042681A4 (en) Inhaler
EP3080915A4 (en) Redundant encoding
SG11201509443SA (en) Image archive disc
EP3069475A4 (en) Streaming event data collection
EP3013400B8 (en) Ventilator system
EP3052024A4 (en) Over-the-wire ultrasound system
GB201317261D0 (en) tape storage medium
EP3065841A4 (en) Disc filters
GB2522299B (en) Contextual audio recording
EP3085647A4 (en) Sucking disc
EP2960063A4 (en) Tape cartridge
EP3632372B8 (en) Inhaler
SG2014008007A (en) Multipiece deck for hard disk drive
EP2843662B8 (en) Systems and methods for multi-level encoding and decoding
EP3088742A4 (en) Multi-blade fan
GB201316895D0 (en) Cassette
HK1217797A1 (en) Methods and systems for optimized staggered disk drive spinup