GB2011229A - Encoding and decoding of digital data - Google Patents

Encoding and decoding of digital data

Info

Publication number
GB2011229A
GB2011229A GB7843161A GB7843161A GB2011229A GB 2011229 A GB2011229 A GB 2011229A GB 7843161 A GB7843161 A GB 7843161A GB 7843161 A GB7843161 A GB 7843161A GB 2011229 A GB2011229 A GB 2011229A
Authority
GB
United Kingdom
Prior art keywords
code
cell
decoding
data
transition
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
GB7843161A
Other versions
GB2011229B (en
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.)
Discovision Associates
Original Assignee
MCA Discovision Inc
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 MCA Discovision Inc filed Critical MCA Discovision Inc
Publication of GB2011229A publication Critical patent/GB2011229A/en
Application granted granted Critical
Publication of GB2011229B publication Critical patent/GB2011229B/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Dc Digital Transmission (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

A binary code (B) or NRZ code (C), is encoded into a code (M) to obtain the highest packing density of information for recording the data on a recording medium. Decoding of code (M) into an NRZ code is also disclosed. The code (M) includes signal level transitions, both at the middle and at the start of data cell intervals. The code (M) avoids any space between successive signal level transitions greater than two data signal intervals such as are possible in the NRZ code. Binary 1 is represented by a midcell transition in either sense, or as a cell boundary transition, spaced by one cell from the last transition. Any transitions separated by two bit cells are known to occur on the cell boundaries, and can be used for synchronisation recovery. <IMAGE>
GB7843161A 1977-11-04 1978-11-03 Encoding and decoding of digital data Expired GB2011229B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US84855077A 1977-11-04 1977-11-04
AU82947/82A AU530226B2 (en) 1977-11-04 1982-04-22 Digital decoder

Publications (2)

Publication Number Publication Date
GB2011229A true GB2011229A (en) 1979-07-04
GB2011229B GB2011229B (en) 1982-08-11

Family

ID=25640103

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7843161A Expired GB2011229B (en) 1977-11-04 1978-11-03 Encoding and decoding of digital data

Country Status (9)

Country Link
JP (1) JPS5474715A (en)
AU (2) AU523034B2 (en)
BE (1) BE871748A (en)
CA (1) CA1136279A (en)
CH (1) CH647366A5 (en)
DE (1) DE2847833C2 (en)
FR (1) FR2408247A1 (en)
GB (1) GB2011229B (en)
NL (1) NL7810901A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209908A (en) * 1987-09-15 1989-05-24 Plessey Co Plc A bi-phase modulator
GB2287622A (en) * 1994-03-17 1995-09-20 Nissan Motor Multiplex serial data communication circuit network for a motor control system
WO2024000811A1 (en) * 2022-06-29 2024-01-04 长鑫存储技术有限公司 Clock control circuit and semiconductor memory

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571910B1 (en) * 1984-10-16 1987-01-09 Bull Sa ENCODING AND DECODING METHOD AND DEVICE FOR SERIAL TRANSMISSION OF BINARY DATA WITH CONTINUOUS COMPONENT REMOVAL

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1323299A (en) * 1970-03-16 1973-07-11 British Aircraft Corp Ltd Data recording methods and apparatus
US3750121A (en) * 1971-06-18 1973-07-31 Honeywell Inc Address marker encoder in three frequency recording
US3815122A (en) * 1973-01-02 1974-06-04 Gte Information Syst Inc Data converting apparatus
FR2234708B1 (en) * 1973-06-22 1976-09-17 Thomson Csf
US3988729A (en) * 1975-01-29 1976-10-26 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Differential pulse code modulation
US4027335A (en) * 1976-03-19 1977-05-31 Ampex Corporation DC free encoding for data transmission system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2209908A (en) * 1987-09-15 1989-05-24 Plessey Co Plc A bi-phase modulator
GB2287622A (en) * 1994-03-17 1995-09-20 Nissan Motor Multiplex serial data communication circuit network for a motor control system
US5600634A (en) * 1994-03-17 1997-02-04 Nissan Motor Co., Ltd. Multiplex serial data communication circuit network with superposed clock and data signals
GB2287622B (en) * 1994-03-17 1998-10-28 Nissan Motor Multiplex serial data communication circuit network and method and motor control system and method using multiplex serial data communication circuit network
WO2024000811A1 (en) * 2022-06-29 2024-01-04 长鑫存储技术有限公司 Clock control circuit and semiconductor memory

Also Published As

Publication number Publication date
AU530226B2 (en) 1983-07-07
CA1136279A (en) 1982-11-23
BE871748A (en) 1979-05-03
AU4114478A (en) 1980-05-01
DE2847833A1 (en) 1979-05-10
FR2408247A1 (en) 1979-06-01
FR2408247B1 (en) 1984-03-09
GB2011229B (en) 1982-08-11
DE2847833C2 (en) 1986-01-09
JPS5474715A (en) 1979-06-15
NL7810901A (en) 1979-05-08
AU523034B2 (en) 1982-07-08
AU8294782A (en) 1982-09-02
CH647366A5 (en) 1985-01-15

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee