FR2451676B1 - - Google Patents

Info

Publication number
FR2451676B1
FR2451676B1 FR7906671A FR7906671A FR2451676B1 FR 2451676 B1 FR2451676 B1 FR 2451676B1 FR 7906671 A FR7906671 A FR 7906671A FR 7906671 A FR7906671 A FR 7906671A FR 2451676 B1 FR2451676 B1 FR 2451676B1
Authority
FR
France
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
FR7906671A
Other languages
French (fr)
Other versions
FR2451676A1 (fr
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR7906671A priority Critical patent/FR2451676A1/fr
Priority to CA000347330A priority patent/CA1144651A/en
Priority to US06/128,384 priority patent/US4360713A/en
Priority to DE19803009678 priority patent/DE3009678A1/de
Priority to GB8008188A priority patent/GB2050123B/en
Priority to JP3047580A priority patent/JPS5660132A/ja
Publication of FR2451676A1 publication Critical patent/FR2451676A1/fr
Application granted granted Critical
Publication of FR2451676B1 publication Critical patent/FR2451676B1/fr
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/06—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation
    • H04B14/066—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM]
    • H04B14/068—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using differential modulation, e.g. delta modulation using differential modulation with several bits [NDPCM] with adaptive feedback
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Analogue/Digital Conversion (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Time-Division Multiplex Systems (AREA)
FR7906671A 1979-03-12 1979-03-12 Detecteur d'echo notamment pour systeme de communication a interpolation de parole Granted FR2451676A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7906671A FR2451676A1 (fr) 1979-03-12 1979-03-12 Detecteur d'echo notamment pour systeme de communication a interpolation de parole
CA000347330A CA1144651A (en) 1979-03-12 1980-03-10 Echo detector particularly for speech interpolation communication systems
US06/128,384 US4360713A (en) 1979-03-12 1980-03-10 Echo detector particularly for speech interpolation communication systems
DE19803009678 DE3009678A1 (de) 1979-03-12 1980-03-11 Echodetektor, insbesondere fuer uebertragungen mit interpolation der sprache
GB8008188A GB2050123B (en) 1979-03-12 1980-03-11 Echo detector particularly for speech interpolation communication systems
JP3047580A JPS5660132A (en) 1979-03-12 1980-03-12 Echo detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7906671A FR2451676A1 (fr) 1979-03-12 1979-03-12 Detecteur d'echo notamment pour systeme de communication a interpolation de parole

Publications (2)

Publication Number Publication Date
FR2451676A1 FR2451676A1 (fr) 1980-10-10
FR2451676B1 true FR2451676B1 (OSRAM) 1982-06-18

Family

ID=9223171

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7906671A Granted FR2451676A1 (fr) 1979-03-12 1979-03-12 Detecteur d'echo notamment pour systeme de communication a interpolation de parole

Country Status (6)

Country Link
US (1) US4360713A (OSRAM)
JP (1) JPS5660132A (OSRAM)
CA (1) CA1144651A (OSRAM)
DE (1) DE3009678A1 (OSRAM)
FR (1) FR2451676A1 (OSRAM)
GB (1) GB2050123B (OSRAM)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4897832A (en) * 1988-01-18 1990-01-30 Oki Electric Industry Co., Ltd. Digital speech interpolation system and speech detector
US7738408B2 (en) * 2004-01-09 2010-06-15 Realtek Semiconductor Corp. Transceiver for full duplex communication systems

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3896273A (en) * 1971-01-08 1975-07-22 Communications Satellite Corp Digital echo suppressor
US3784747A (en) * 1971-12-03 1974-01-08 Bell Telephone Labor Inc Speech suppression by predictive filtering
NL165014C (nl) * 1973-09-03 1981-02-16 Philips Nv Transmissiestelsel met een zender en een ontvanger voor het met behulp van een pulscode overdragen van informatiesignalen.
US3942116A (en) * 1975-03-13 1976-03-02 California Microwave, Inc. Transceiver having improved voice actuated carrier and echo suppression circuit
US4005276A (en) * 1975-03-20 1977-01-25 International Business Machines Corporation Digital voice signaling with digital echo detection and voice activity compression used to cancel echo
US4064379A (en) * 1976-06-11 1977-12-20 Communications Satellite Corporation Logarithmic echo canceller
US4123626A (en) * 1977-11-23 1978-10-31 Northern Telecom Limited Digital echo attenuation circuit for a telephone system

Also Published As

Publication number Publication date
US4360713A (en) 1982-11-23
DE3009678A1 (de) 1980-09-25
GB2050123A (en) 1980-12-31
JPS5660132A (en) 1981-05-23
GB2050123B (en) 1983-11-02
CA1144651A (en) 1983-04-12
FR2451676A1 (fr) 1980-10-10

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Legal Events

Date Code Title Description
ST Notification of lapse