FR888195A - Systèmes de transmission de signaux électriques - Google Patents

Systèmes de transmission de signaux électriques

Info

Publication number
FR888195A
FR888195A FR888195DA FR888195A FR 888195 A FR888195 A FR 888195A FR 888195D A FR888195D A FR 888195DA FR 888195 A FR888195 A FR 888195A
Authority
FR
France
Prior art keywords
electrical signal
signal transmission
transmission systems
systems
electrical
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
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.)
Thales SA
Original Assignee
Le Materiel Telephonique Thomson CSF
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 Le Materiel Telephonique Thomson CSF filed Critical Le Materiel Telephonique Thomson CSF
Application granted granted Critical
Publication of FR888195A publication Critical patent/FR888195A/fr
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J3/00—Time-division multiplex systems
    • H04J3/18—Time-division multiplex systems using frequency compression and subsequent expansion of the individual signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/662—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a time/frequency relationship, e.g. time compression or expansion
    • 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
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/12—Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal
    • H04N7/127—Systems in which different parts of the picture signal frequency band are individually processed, e.g. suppressed, transposed

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Television Signal Processing For Recording (AREA)
FR888195D 1941-01-17 1942-01-10 Systèmes de transmission de signaux électriques Expired FR888195A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US374860A US2306435A (en) 1941-01-17 1941-01-17 Frequency compression

Publications (1)

Publication Number Publication Date
FR888195A true FR888195A (fr) 1943-12-06

Family

ID=23478485

Family Applications (1)

Application Number Title Priority Date Filing Date
FR888195D Expired FR888195A (fr) 1941-01-17 1942-01-10 Systèmes de transmission de signaux électriques

Country Status (5)

Country Link
US (1) US2306435A (fr)
BE (1) BE446268A (fr)
CH (1) CH266524A (fr)
FR (1) FR888195A (fr)
NL (1) NL77417C (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2489296A (en) * 1942-02-05 1949-11-29 Int Standard Electric Corp System for measuring frequency deviations
US2617879A (en) * 1948-06-18 1952-11-11 Rca Corp Signal quantizer
US2578083A (en) * 1948-07-07 1951-12-11 Automatic Elect Lab Time-division multiplex system wherein the duration of each received sample is effectively increased
US2656407A (en) * 1949-02-12 1953-10-20 Zenith Radio Corp Subscriber signaling system
US2649498A (en) * 1949-03-03 1953-08-18 Zenith Radio Corp Blanking arrangement for subscription television receivers
US2652449A (en) * 1949-12-30 1953-09-15 Bell Telephone Labor Inc Motional correlation in reduced band width television
US2629011A (en) * 1949-12-30 1953-02-17 Bell Telephone Labor Inc Television system having reduced transmission bandwidth
US2987614A (en) * 1952-02-06 1961-06-06 Claudius H M Roberts Secrecy voice radio communication system
US2879499A (en) * 1954-07-23 1959-03-24 Ackerlind Erik High frequency pen recorder
NL198601A (fr) * 1954-09-30
US2921976A (en) * 1956-03-30 1960-01-19 Minnesota Mining & Mfg Reproducing color television chrominance signals
US2906816A (en) * 1956-07-24 1959-09-29 Bell Telephone Labor Inc Method and apparatus for reducing television bandwidth
GB858346A (en) * 1956-11-20 1961-01-11 Nat Res Dev Improvements in or relating to television, facsimile and like signal transmission systems
US3024311A (en) * 1957-01-29 1962-03-06 Ampex Signal system
US3083338A (en) * 1959-11-10 1963-03-26 Crosby Lab Inc Speech communication system
US3184542A (en) * 1961-03-15 1965-05-18 David S Horsley Video recording and reproduction with reduced redundancy
US3204026A (en) * 1962-04-30 1965-08-31 William J Casey Narrow bandwidth scanning system
US3726995A (en) * 1971-01-07 1973-04-10 H Lehmann Method and apparatus for more slowly telecasting live sports events instantly as they take place

Also Published As

Publication number Publication date
NL77417C (fr)
US2306435A (en) 1942-12-29
BE446268A (fr)
CH266524A (fr) 1950-01-31

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