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GB2011762A - Transmission of speech - Google Patents

Transmission of speech

Info

Publication number
GB2011762A
GB2011762A GB7841444A GB7841444A GB2011762A GB 2011762 A GB2011762 A GB 2011762A GB 7841444 A GB7841444 A GB 7841444A GB 7841444 A GB7841444 A GB 7841444A GB 2011762 A GB2011762 A GB 2011762A
Authority
GB
United Kingdom
Prior art keywords
speech
pilot signal
receiver
superimposition
loudspeaker
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.)
Granted
Application number
GB7841444A
Other versions
GB2011762B (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.)
NEUMANN ELEKTRONIK GmbH
Original Assignee
NEUMANN ELEKTRONIK GmbH
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 NEUMANN ELEKTRONIK GmbH filed Critical NEUMANN ELEKTRONIK GmbH
Publication of GB2011762A publication Critical patent/GB2011762A/en
Application granted granted Critical
Publication of GB2011762B publication Critical patent/GB2011762B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/005—Control by a pilot signal

Landscapes

  • Noise Elimination (AREA)
  • Transceivers (AREA)
  • Telephonic Communication Services (AREA)

Abstract

In speech communication systems e.g. utilizing wireless waves or transmission lines, comprising a transmitter and a receiver, the effects of audio- frequency interference (24), e.g. rustling or crackling in the loudspeaker of the receiver, are suppressed by the superimposition on the carrier of a speech- controlled low-frequency pilot signal coincidental with the superimposition of the speech signal (25), a switch (19) being provided in the audio frequency path for enabling the loudspeaker only in the presence of the pilot signal. The switch (19) is controlled by a receiver element (16) tuned to the demodulated pilot signal. <IMAGE>
GB7841444A 1977-12-29 1978-10-20 Method and apparatus for transmission of speeck Expired GB2011762B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2758714A DE2758714C2 (en) 1977-12-29 1977-12-29 Telecommunication system

Publications (2)

Publication Number Publication Date
GB2011762A true GB2011762A (en) 1979-07-11
GB2011762B GB2011762B (en) 1982-04-21

Family

ID=6027640

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7841444A Expired GB2011762B (en) 1977-12-29 1978-10-20 Method and apparatus for transmission of speeck

Country Status (5)

Country Link
AT (1) AT377137B (en)
CH (1) CH639513A5 (en)
DE (1) DE2758714C2 (en)
GB (1) GB2011762B (en)
SE (1) SE437318B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116055964A (en) * 2023-01-28 2023-05-02 荣耀终端有限公司 Speaker circuit and terminal device

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006025B (en) * 1955-02-09 1957-04-11 Philips Patentverwaltung Method for the transmission of messages between a main station that can be connected to a telephone network and an in particular mobile substation
US3027455A (en) * 1959-07-27 1962-03-27 Motorola Inc Electronic circuit
NL298885A (en) * 1962-10-16
DE1566989A1 (en) * 1967-04-21 1970-02-12 Bbc Brown Boveri & Cie Arrangement for tone-controlled transmission / reception switching
DE1931263B2 (en) * 1969-06-20 1971-09-30 Stubbe-electronic, Paul K. Stubbe, 6000 Frankfurt SELECTIVE CALL PROCEDURE FOR ELECTRIC COMMUNICATION EQUIPMENT AND DEVICE FOR ITS IMPLEMENTATION
NL7214392A (en) * 1972-10-25 1974-04-29
GB1573602A (en) * 1975-10-06 1980-08-28 Bang & Olufsen As Methods and means for producing and reproducing sound signals

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116055964A (en) * 2023-01-28 2023-05-02 荣耀终端有限公司 Speaker circuit and terminal device
CN116055964B (en) * 2023-01-28 2023-08-22 荣耀终端有限公司 Speaker circuit and terminal device

Also Published As

Publication number Publication date
DE2758714C2 (en) 1985-10-10
DE2758714A1 (en) 1979-07-05
ATA651678A (en) 1984-06-15
SE7812929L (en) 1979-06-30
SE437318B (en) 1985-02-18
CH639513A5 (en) 1983-11-15
GB2011762B (en) 1982-04-21
AT377137B (en) 1985-02-11

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Legal Events

Date Code Title Description
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19941020