GB2007468A - Binary data transmission method and corresponding encoding and decoding devices - Google Patents

Binary data transmission method and corresponding encoding and decoding devices

Info

Publication number
GB2007468A
GB2007468A GB7838859A GB7838859A GB2007468A GB 2007468 A GB2007468 A GB 2007468A GB 7838859 A GB7838859 A GB 7838859A GB 7838859 A GB7838859 A GB 7838859A GB 2007468 A GB2007468 A GB 2007468A
Authority
GB
United Kingdom
Prior art keywords
digits
digit
represented
binary
binary data
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
GB7838859A
Other versions
GB2007468B (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.)
Alcatel CIT SA
Original Assignee
Alcatel CIT SA
Compagnie Industrielle de Telecommunication CIT Alcatel SA
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 Alcatel CIT SA, Compagnie Industrielle de Telecommunication CIT Alcatel SA filed Critical Alcatel CIT SA
Publication of GB2007468A publication Critical patent/GB2007468A/en
Application granted granted Critical
Publication of GB2007468B publication Critical patent/GB2007468B/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04L25/4906—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 binary codes

Abstract

The invention relates to a method of coding binary data with a recurrence frequency F, the method being particularly suitable when data is to be transmitted via optical fibres. As described, a binary 1 digit is represented by a pulse in one half of the corresponding binary unit, a binary 0 digit being represented by the absence of any pulse in the corresponding binary unit, except that k 0 digits with defined ranks i.e. positions, in a sequence of m successive 0 digits are each represented by a pulse in the other half of the corresponding binary unit, k being less than m. As shown in Figure 1, k = 1 and m = 4 so that in a sequence of four 0 digits, one 0 digit (the k digit) having a defined rank (in this case the last of the four 0 digits) is represented as above. Suitable arrangements for effecting the required encoding and decoding are also described. <IMAGE>
GB7838859A 1977-10-27 1978-10-02 Binary data transmission method and corresponding encoding encoding and decoding devices Expired GB2007468B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7732436A FR2407620A1 (en) 1977-10-27 1977-10-27 BINARY INFORMATION TRANSMISSION PROCESS AND CORRESPONDING CODING AND DECODING DEVICES

Publications (2)

Publication Number Publication Date
GB2007468A true GB2007468A (en) 1979-05-16
GB2007468B GB2007468B (en) 1982-03-31

Family

ID=9197015

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838859A Expired GB2007468B (en) 1977-10-27 1978-10-02 Binary data transmission method and corresponding encoding encoding and decoding devices

Country Status (9)

Country Link
BE (1) BE870614A (en)
CA (1) CA1119302A (en)
DE (1) DE2845828A1 (en)
FR (1) FR2407620A1 (en)
GB (1) GB2007468B (en)
IE (1) IE47297B1 (en)
IT (1) IT1160890B (en)
LU (1) LU80427A1 (en)
NL (1) NL7810565A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018142A1 (en) * 1979-04-17 1980-10-29 Gec-Marconi Limited Data transmission systems

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2944459C2 (en) * 1979-11-03 1984-04-26 ANT Nachrichtentechnik GmbH, 7150 Backnang Method for transmitting bipolar signals by means of an optical transmitter
AU542859B2 (en) * 1979-12-28 1985-03-21 Sony Corporation Method for digital encoding/decoding

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0018142A1 (en) * 1979-04-17 1980-10-29 Gec-Marconi Limited Data transmission systems

Also Published As

Publication number Publication date
BE870614A (en) 1979-03-20
FR2407620B1 (en) 1980-04-25
IT1160890B (en) 1987-03-11
LU80427A1 (en) 1979-06-15
CA1119302A (en) 1982-03-02
IT7869466A0 (en) 1978-10-26
NL7810565A (en) 1979-05-02
IE47297B1 (en) 1984-02-08
FR2407620A1 (en) 1979-05-25
IE782120L (en) 1979-04-27
DE2845828A1 (en) 1979-05-03
GB2007468B (en) 1982-03-31

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Legal Events

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PCNP Patent ceased through non-payment of renewal fee