GB535384A - Improvements in or relating to electric signalling and communication systems - Google Patents
Improvements in or relating to electric signalling and communication systemsInfo
- Publication number
- GB535384A GB535384A GB27369/39A GB2736939A GB535384A GB 535384 A GB535384 A GB 535384A GB 27369/39 A GB27369/39 A GB 27369/39A GB 2736939 A GB2736939 A GB 2736939A GB 535384 A GB535384 A GB 535384A
- Authority
- GB
- United Kingdom
- Prior art keywords
- wave
- television
- decreases
- time periods
- relating
- 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
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1676—Time-division multiplex with pulse-position, pulse-interval, or pulse-width modulation
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/18—Electrical details
- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
535,384. Television. STANDARD TELEPHONES & CABLES, Ltd., BEATTY, W. A., and SCULLY, C. T. Oct. 6,1939, No. 27369. Drawings to Specification. [Class 40 (iii)] [Also in Group XXXIX] In the systems described in Specifications 523,575 and 524,671 for converting sound, television or other waves into a train of pulses defining time periods representative of signal amplitudes, the time periods instead of consisting of increases or decreases of a fixed period according to whether the amplitude is positive or negative, comprise increases (or decreases) of fixed minimum (or maximum) periods. The invention is applicable to any of the types of pulse trains described in the above mentioned Specifications and is effected by combining with the wave, before conversion into pulse form, a direct current component which varies with the amplitude level of the wave. The vision wave in television systems is used without modification if the D.C. component is present.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE442105D BE442105A (en) | 1939-10-06 | ||
GB27369/39A GB535384A (en) | 1939-10-06 | 1939-10-06 | Improvements in or relating to electric signalling and communication systems |
FR870474D FR870474A (en) | 1939-10-06 | 1941-02-28 | Electrical communication and signaling system |
ES0175931A ES175931A1 (en) | 1939-10-06 | 1946-11-29 | IMPROVEMENTS IN OR RELATED TO SIGNALING AND COMMUNICATION SYSTEMS |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB27369/39A GB535384A (en) | 1939-10-06 | 1939-10-06 | Improvements in or relating to electric signalling and communication systems |
GB870474X | 1939-10-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB535384A true GB535384A (en) | 1941-04-08 |
Family
ID=34839927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB27369/39A Expired GB535384A (en) | 1939-10-06 | 1939-10-06 | Improvements in or relating to electric signalling and communication systems |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR870474A (en) |
GB (1) | GB535384A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE948986C (en) * | 1942-06-10 | 1956-09-13 | Telefunken Gmbh | Circuit arrangement for receiving phase-modulated pulses |
-
1939
- 1939-10-06 GB GB27369/39A patent/GB535384A/en not_active Expired
-
1941
- 1941-02-28 FR FR870474D patent/FR870474A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE948986C (en) * | 1942-06-10 | 1956-09-13 | Telefunken Gmbh | Circuit arrangement for receiving phase-modulated pulses |
Also Published As
Publication number | Publication date |
---|---|
FR870474A (en) | 1942-03-12 |
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