GB929336A - A.c. telegraph system using a limited frequency band - Google Patents
A.c. telegraph system using a limited frequency bandInfo
- Publication number
- GB929336A GB929336A GB1294062A GB1294062A GB929336A GB 929336 A GB929336 A GB 929336A GB 1294062 A GB1294062 A GB 1294062A GB 1294062 A GB1294062 A GB 1294062A GB 929336 A GB929336 A GB 929336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- elements
- unit code
- april
- character signal
- triggers
- 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
Links
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M5/00—Conversion of the form of the representation of individual digits
-
- 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
- H03M13/47—Error detection, forward error correction or error protection, not provided for in groups H03M13/01 - H03M13/37
- H03M13/51—Constant weight codes; n-out-of-m codes; Berger codes
-
- 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
-
- 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
-
- 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
- H04L25/4908—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 using mBnB codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Theoretical Computer Science (AREA)
- Probability & Statistics with Applications (AREA)
- Television Systems (AREA)
- Dc Digital Transmission (AREA)
- Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
Abstract
929,336. Error detecting telegraph systems. DE STAAT DER NEDERLANDEN, TEN DEZE VERTEGENWOORDIGD DOOR DE DIRECTEUR-GENERAAL DER POSTERIJEN, TELEGRAFIE EN TELEFONIE. April 4, 1962 [April 4, 1961], No. 12940/62. Drawings to Specification. Class 40 (3). The invention provides a means for translating a 5-unit code to an 8-unit code, the 8-unit code being such that no character signal contains more than three consecutive elements having the same polarity and so that there can be no more than three consecutive elements of similar polarity in any sequence of elements. In the embodiment described, a tape transmitter feeds 5-unit signals to set five trigger circuits. Three further triggers are provided, these being set in accordance with the above requirements by means of a number of diode gates which are fed by the first five triggers. There is an additional feature that each character signal has four mark and four space elements, additional gates are necessary to ensure this. Specification 774,509 is referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL263171A NL121716C (en) | 1961-04-04 | 1961-04-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB929336A true GB929336A (en) | 1963-06-19 |
Family
ID=19752961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1294062A Expired GB929336A (en) | 1961-04-04 | 1962-04-04 | A.c. telegraph system using a limited frequency band |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE615464A (en) |
CH (1) | CH394282A (en) |
DE (1) | DE1206947B (en) |
FR (1) | FR1319527A (en) |
GB (1) | GB929336A (en) |
NL (1) | NL121716C (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2469839A1 (en) * | 1979-11-14 | 1981-05-22 | Brossard Pierre | ENCODER-DECODER FOR DIGITAL TRANSMISSION CHANNELS |
US5327127A (en) * | 1989-06-30 | 1994-07-05 | Inmos Limited | Message encoding which utilizes control codes and data codes |
US5422881A (en) * | 1989-06-30 | 1995-06-06 | Inmos Limited | Message encoding |
US5644569A (en) * | 1993-06-11 | 1997-07-01 | Sgs-Thomson Microelectronics Limited | Transmission of messages |
US5692021A (en) * | 1993-06-11 | 1997-11-25 | Sgs-Thomson Microelectronics Limited | Encoding digital data |
US5805087A (en) * | 1993-06-11 | 1998-09-08 | Stmicroelectronics, Ltd. | Encoding scheme |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3713123A (en) * | 1969-12-18 | 1973-01-23 | Gen Electric | High density data recording and error tolerant data reproducing system |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL250403A (en) * | 1959-04-15 |
-
1961
- 1961-04-04 NL NL263171A patent/NL121716C/xx active
-
1962
- 1962-03-15 CH CH310962A patent/CH394282A/en unknown
- 1962-03-17 DE DE1962ST018979 patent/DE1206947B/en active Pending
- 1962-03-23 BE BE615464A patent/BE615464A/en unknown
- 1962-03-23 FR FR892064A patent/FR1319527A/en not_active Expired
- 1962-04-04 GB GB1294062A patent/GB929336A/en not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2469839A1 (en) * | 1979-11-14 | 1981-05-22 | Brossard Pierre | ENCODER-DECODER FOR DIGITAL TRANSMISSION CHANNELS |
US5327127A (en) * | 1989-06-30 | 1994-07-05 | Inmos Limited | Message encoding which utilizes control codes and data codes |
US5422881A (en) * | 1989-06-30 | 1995-06-06 | Inmos Limited | Message encoding |
US5422879A (en) * | 1989-06-30 | 1995-06-06 | Inmos Limited | Data flow control mechanism utilizing low level flow control codes |
US5644569A (en) * | 1993-06-11 | 1997-07-01 | Sgs-Thomson Microelectronics Limited | Transmission of messages |
US5692021A (en) * | 1993-06-11 | 1997-11-25 | Sgs-Thomson Microelectronics Limited | Encoding digital data |
US5805087A (en) * | 1993-06-11 | 1998-09-08 | Stmicroelectronics, Ltd. | Encoding scheme |
Also Published As
Publication number | Publication date |
---|---|
CH394282A (en) | 1965-06-30 |
BE615464A (en) | 1962-07-16 |
DE1206947B (en) | 1965-12-16 |
NL263171A (en) | 1964-05-25 |
FR1319527A (en) | 1963-03-01 |
NL121716C (en) | 1967-02-08 |
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