GB1442444A - Signal decoder - Google Patents

Signal decoder

Info

Publication number
GB1442444A
GB1442444A GB4077673A GB4077673A GB1442444A GB 1442444 A GB1442444 A GB 1442444A GB 4077673 A GB4077673 A GB 4077673A GB 4077673 A GB4077673 A GB 4077673A GB 1442444 A GB1442444 A GB 1442444A
Authority
GB
United Kingdom
Prior art keywords
pulse
clock
transition
interval
signal
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.)
Expired
Application number
GB4077673A
Other languages
English (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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Publication of GB1442444A publication Critical patent/GB1442444A/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
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K9/00—Demodulating pulses which have been modulated with a continuously-variable signal
    • H03K9/06—Demodulating pulses which have been modulated with a continuously-variable signal of frequency- or rate-modulated pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4902—Pulse width modulation; Pulse position modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
    • H04L25/40—Transmitting circuits; Receiving circuits
    • H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
    • H04L25/4904—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using self-synchronising codes, e.g. split-phase codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Manipulation Of Pulses (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Dc Digital Transmission (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Analogue/Digital Conversion (AREA)
GB4077673A 1972-09-07 1973-08-30 Signal decoder Expired GB1442444A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28713272A 1972-09-07 1972-09-07

Publications (1)

Publication Number Publication Date
GB1442444A true GB1442444A (en) 1976-07-14

Family

ID=23101591

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4077673A Expired GB1442444A (en) 1972-09-07 1973-08-30 Signal decoder

Country Status (9)

Country Link
JP (1) JPS4966116A (fr)
BE (1) BE804062A (fr)
CA (1) CA1037570A (fr)
CH (1) CH573691A5 (fr)
FR (1) FR2199231B1 (fr)
GB (1) GB1442444A (fr)
IT (1) IT992697B (fr)
NL (1) NL7311473A (fr)
SE (1) SE392551B (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5789769A (en) * 1980-11-26 1982-06-04 Nippon Denso Co Ltd Controller for copying machine group
CN114090482B (zh) * 2021-09-28 2024-06-07 荣湃半导体（上海）有限公司 一种传输数据的延迟抵消方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3631422A (en) * 1969-02-03 1971-12-28 Ibm System for detection of data time interval measurement
US3708748A (en) * 1970-04-27 1973-01-02 Ibm Retrospective pulse modulation and apparatus therefor
US3711843A (en) * 1970-04-27 1973-01-16 Olivetti & Co Spa Self-adapting synchronization system for reading information from a moving support
US3720927A (en) * 1971-01-25 1973-03-13 Redactron Corp Speed insensitive reading and writing apparatus for digital information
FR2136906B1 (fr) * 1971-05-07 1975-07-04 Automatisme Cie Gle
JPS4861122A (fr) * 1971-12-02 1973-08-27

Also Published As

Publication number Publication date
DE2343472A1 (de) 1974-03-28
CA1037570A (fr) 1978-08-29
FR2199231A1 (fr) 1974-04-05
JPS4966116A (fr) 1974-06-26
BE804062A (fr) 1973-12-17
CH573691A5 (fr) 1976-03-15
IT992697B (it) 1975-09-30
NL7311473A (fr) 1974-03-11
SE392551B (sv) 1977-03-28
DE2343472B2 (de) 1975-08-21
FR2199231B1 (fr) 1976-05-07

Similar Documents

Publication Publication Date Title
US3281806A (en) Pulse width modulation representation of paired binary digits
GB1279773A (en) Data transmission terminal
GB1324223A (en) Signal encoding and decoding
GB986645A (en) Improvements in or relating to digital recording systems
GB1493555A (en) Decoding circuit for binary data
GB1470636A (en) Apparatus and method for encoding binary data
GB1324386A (en) Recording and reproducing information in a self-clocking non- return-to-zero format
GB1257157A (fr)
GB1354744A (en) Encoding of binary data
US3564557A (en) Self-clocking recording
GB1427811A (en) Method of and apparattus for interpreting a coded record
GB1415584A (en) Method and apparatus for coded binary data retrieval
US3278900A (en) Character recognition system employing pulse time interval measurement
GB1147575A (en) Data storage method and apparatus
US3736581A (en) High density digital recording
EP0346774A1 (fr) Circuit décodeur pour code à trois parties
US3418585A (en) Circuit for detecting the presence of a special character in phase-encoded binary data
GB1210650A (en) Apparatus for encoding binary data
GB1442444A (en) Signal decoder
US5025328A (en) Circuit for decoding binary information
US3725672A (en) Method and circuit arrangement for displaying or recording a sequence of binary bits
GB1294397A (en) Improvements in high density storage and retrieval system
GB1339840A (en) Apparatus for decoding digital information
GB954942A (en) Improvements in or relating to high density recording systems
GB1369613A (en) Data systems apparatus and methods

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee