JPS5660132A - Echo detector - Google Patents

Echo detector

Info

Publication number
JPS5660132A
JPS5660132A JP3047580A JP3047580A JPS5660132A JP S5660132 A JPS5660132 A JP S5660132A JP 3047580 A JP3047580 A JP 3047580A JP 3047580 A JP3047580 A JP 3047580A JP S5660132 A JPS5660132 A JP S5660132A
Authority
JP
Japan
Prior art keywords
echo detector
echo
detector
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.)
Pending
Application number
JP3047580A
Other languages
English (en)
Japanese (ja)
Inventor
Somaaniyu Jiyoeru
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
Publication of JPS5660132A publication Critical patent/JPS5660132A/ja
Pending 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)
JP3047580A 1979-03-12 1980-03-12 Echo detector Pending JPS5660132A (en)

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 (1)

Publication Number Publication Date
JPS5660132A true JPS5660132A (en) 1981-05-23

Family

ID=9223171

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3047580A Pending JPS5660132A (en) 1979-03-12 1980-03-12 Echo detector

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
FR2451676B1 (OSRAM) 1982-06-18
GB2050123B (en) 1983-11-02
CA1144651A (en) 1983-04-12
FR2451676A1 (fr) 1980-10-10

Similar Documents

Publication Publication Date Title
JPS55143694A (en) Invador detector
GB2063002B (en) Echo measurement system
JPS5694203A (en) Location detector
JPS5616821A (en) Mass detector
JPS56100372A (en) Movinggtarget detector
JPS5596130A (en) Ultrasoniccwave probe
JPS5696221A (en) Probe
JPS5599042A (en) Detector for knockkvibration
JPS566266A (en) Measuring correcteddvalue
JPS55145408A (en) Preamplifier
AU539641B2 (en) Radioactivity measurement
GB2040454B (en) Doppler log
GB2064254B (en) Photo-feedback preamplifier
JPS5612698A (en) Echo attaching apparatus
JPS566509A (en) Preamplifier
JPS55157097A (en) Detector
JPS5640884A (en) Diaply unit
JPS55129048A (en) Ultrasoniccwave probe
JPS5666776A (en) Tomograph
JPS5660132A (en) Echo detector
JPS5611495A (en) Echo attaching apparatus
JPS55110392A (en) Invador detector device
JPS55108094A (en) Invador detector device
JPS5611246A (en) Resinnmetal complex
JPS55150092A (en) Invador detector