GB937404A - Improvements in or relating to apparatus for synthesising information signals and tosystems employing such apparatus - Google Patents

Improvements in or relating to apparatus for synthesising information signals and tosystems employing such apparatus

Info

Publication number
GB937404A
GB937404A GB38054/59A GB3805459A GB937404A GB 937404 A GB937404 A GB 937404A GB 38054/59 A GB38054/59 A GB 38054/59A GB 3805459 A GB3805459 A GB 3805459A GB 937404 A GB937404 A GB 937404A
Authority
GB
United Kingdom
Prior art keywords
network
frequency band
band
fed
pass filters
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
GB38054/59A
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.)
AT&T Corp
Original Assignee
Western Electric Co Inc
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 Western Electric Co Inc filed Critical Western Electric Co Inc
Publication of GB937404A publication Critical patent/GB937404A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04B1/667—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 division in frequency subbands

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Amplitude Modulation (AREA)
GB38054/59A 1958-11-17 1959-11-10 Improvements in or relating to apparatus for synthesising information signals and tosystems employing such apparatus Expired GB937404A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US774173A US3030450A (en) 1958-11-17 1958-11-17 Band compression system

Publications (1)

Publication Number Publication Date
GB937404A true GB937404A (en) 1963-09-18

Family

ID=25100462

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38054/59A Expired GB937404A (en) 1958-11-17 1959-11-10 Improvements in or relating to apparatus for synthesising information signals and tosystems employing such apparatus

Country Status (6)

Country Link
US (1) US3030450A (enrdf_load_stackoverflow)
BE (1) BE584353A (enrdf_load_stackoverflow)
DE (1) DE1114851B (enrdf_load_stackoverflow)
FR (1) FR1239222A (enrdf_load_stackoverflow)
GB (1) GB937404A (enrdf_load_stackoverflow)
NL (2) NL127390C (enrdf_load_stackoverflow)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL272110A (nl) * 1960-12-08 1964-08-25 Jean Albert Dreyfus Drukaandrijving
NL272809A (enrdf_load_stackoverflow) * 1960-12-27
US3167710A (en) * 1961-02-01 1965-01-26 Jersey Prod Res Co System for analysis of electrical signals including parallel filter channels
US3165734A (en) * 1961-11-02 1965-01-12 Grodzinsky Samuel Screw noise simulation technique
US3411089A (en) * 1962-06-28 1968-11-12 Raytheon Co Communication system
US3431356A (en) * 1965-06-04 1969-03-04 Integrated Electronic Corp Apparatus and method for reconstructing speech
US3420955A (en) * 1965-11-19 1969-01-07 Bell Telephone Labor Inc Automatic peak selector
US3431362A (en) * 1966-04-22 1969-03-04 Bell Telephone Labor Inc Voice-excited,bandwidth reduction system employing pitch frequency pulses generated by unencoded baseband signal
US3471644A (en) * 1966-05-02 1969-10-07 Massachusetts Inst Technology Voice vocoding and transmitting system
US3448216A (en) * 1966-08-03 1969-06-03 Bell Telephone Labor Inc Vocoder system
DE1537596B1 (de) * 1967-11-14 1970-09-03 Michel Copel Verfahren und Schaltungsanordnung zum Verbessern der Verstaendlichkeit frequenzverzerrter Sprache
US3541266A (en) * 1968-09-30 1970-11-17 Octronix Inc Bandwidth compressor and expander
US3743787A (en) * 1969-09-02 1973-07-03 H Fujisaki Speech signal transmission systems utilizing a non-linear circuit in the base band channel
US3622714A (en) * 1969-09-02 1971-11-23 Bell Telephone Labor Inc Telephonic transmission using complementary comb filters
IT979348B (it) * 1972-02-24 1974-09-30 Int Standard Electric Corp Sistema per trasferire segnali acustici ad ampia banda
US3914554A (en) * 1973-05-18 1975-10-21 Bell Telephone Labor Inc Communication system employing spectrum folding
US3946162A (en) * 1973-06-04 1976-03-23 International Standard Electric Corporation System for transferring wideband sound signals
FR2238412A5 (enrdf_load_stackoverflow) * 1973-07-20 1975-02-14 Trt Telecom Radio Electr
US3988546A (en) * 1974-09-13 1976-10-26 General Signal Corporation System for audibly recognizing an aurally unclassifiable signal
DE2516743C2 (de) * 1975-04-16 1984-01-19 Standard Elektrik Lorenz Ag, 7000 Stuttgart Empfänger für ein System zur elektrischen Nachrichtenübertragung mit herabgesetzter Bandbreite
GB1559897A (en) * 1977-03-15 1980-01-30 Post Office Multiplexing speech
US4181822A (en) * 1978-03-07 1980-01-01 Bell & Howell Company Bandsplitter systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2640880A (en) * 1953-06-02 Speech communication system
DE722607C (de) * 1939-01-14 1942-07-22 Karl Otto Schmidt Dr Verfahren zur besseren Ausnutzung des UEbertragungsweges
US2151091A (en) * 1935-10-30 1939-03-21 Bell Telephone Labor Inc Signal transmission
US2817711A (en) * 1954-05-10 1957-12-24 Bell Telephone Labor Inc Band compression system

Also Published As

Publication number Publication date
NL245178A (enrdf_load_stackoverflow)
BE584353A (fr) 1960-03-01
FR1239222A (fr) 1960-08-19
NL127390C (enrdf_load_stackoverflow)
US3030450A (en) 1962-04-17
DE1114851B (de) 1961-10-12

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