IE782120L - Binary data transmission method - Google Patents
Binary data transmission methodInfo
- Publication number
- IE782120L IE782120L IE782120A IE212078A IE782120L IE 782120 L IE782120 L IE 782120L IE 782120 A IE782120 A IE 782120A IE 212078 A IE212078 A IE 212078A IE 782120 L IE782120 L IE 782120L
- Authority
- IE
- Ireland
- Prior art keywords
- digits
- digit
- represented
- binary
- pulse
- Prior art date
Links
- 230000005540 biological transmission Effects 0.000 title 1
- 230000003287 optical effect Effects 0.000 abstract 1
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
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Dc Digital Transmission (AREA)
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>
[GB2007468A]
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 |
|---|---|
| IE782120L true IE782120L (en) | 1979-04-27 |
| IE47297B1 IE47297B1 (en) | 1984-02-08 |
Family
ID=9197015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE2120/78A IE47297B1 (en) | 1977-10-27 | 1978-10-26 | Binary data transmission method and corresponding 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0018142B1 (en) * | 1979-04-17 | 1982-12-29 | Gec-Marconi Limited | Data transmission systems |
| 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 |
-
1977
- 1977-10-27 FR FR7732436A patent/FR2407620A1/en active Granted
-
1978
- 1978-09-20 BE BE1009065A patent/BE870614A/en not_active IP Right Cessation
- 1978-10-02 GB GB7838859A patent/GB2007468B/en not_active Expired
- 1978-10-20 DE DE19782845828 patent/DE2845828A1/en not_active Withdrawn
- 1978-10-23 NL NL7810565A patent/NL7810565A/en not_active Application Discontinuation
- 1978-10-26 CA CA000314351A patent/CA1119302A/en not_active Expired
- 1978-10-26 IE IE2120/78A patent/IE47297B1/en unknown
- 1978-10-26 IT IT69466/78A patent/IT1160890B/en active
- 1978-10-26 LU LU80427A patent/LU80427A1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2407620B1 (en) | 1980-04-25 |
| CA1119302A (en) | 1982-03-02 |
| DE2845828A1 (en) | 1979-05-03 |
| FR2407620A1 (en) | 1979-05-25 |
| IT1160890B (en) | 1987-03-11 |
| BE870614A (en) | 1979-03-20 |
| IT7869466A0 (en) | 1978-10-26 |
| IE47297B1 (en) | 1984-02-08 |
| GB2007468A (en) | 1979-05-16 |
| GB2007468B (en) | 1982-03-31 |
| NL7810565A (en) | 1979-05-02 |
| LU80427A1 (en) | 1979-06-15 |
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