FR2549320B1 - Systeme d'annulation d'echos comprenant des dispositifs annulateurs d'echo connectes en cascade, pouvant fonctionner independamment les uns des autres - Google Patents

Systeme d'annulation d'echos comprenant des dispositifs annulateurs d'echo connectes en cascade, pouvant fonctionner independamment les uns des autres

Info

Publication number
FR2549320B1
FR2549320B1 FR8409895A FR8409895A FR2549320B1 FR 2549320 B1 FR2549320 B1 FR 2549320B1 FR 8409895 A FR8409895 A FR 8409895A FR 8409895 A FR8409895 A FR 8409895A FR 2549320 B1 FR2549320 B1 FR 2549320B1
Authority
FR
France
Prior art keywords
echo
cascade
devices connected
operate independently
cancellation system
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
FR8409895A
Other languages
English (en)
French (fr)
Other versions
FR2549320A1 (fr
Inventor
Yuisuke Maruyama
Yasuo Itoh
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Publication of FR2549320A1 publication Critical patent/FR2549320A1/fr
Application granted granted Critical
Publication of FR2549320B1 publication Critical patent/FR2549320B1/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/237—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using two adaptive filters, e.g. for near end and for end echo cancelling
    • 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
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • H04B3/238—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers using initial training sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
FR8409895A 1983-06-24 1984-06-22 Systeme d'annulation d'echos comprenant des dispositifs annulateurs d'echo connectes en cascade, pouvant fonctionner independamment les uns des autres Expired FR2549320B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11381183A JPS605634A (ja) 1983-06-24 1983-06-24 エコ−キヤンセラ

Publications (2)

Publication Number Publication Date
FR2549320A1 FR2549320A1 (fr) 1985-01-18
FR2549320B1 true FR2549320B1 (fr) 1986-07-11

Family

ID=14621643

Family Applications (1)

Application Number Title Priority Date Filing Date
FR8409895A Expired FR2549320B1 (fr) 1983-06-24 1984-06-22 Systeme d'annulation d'echos comprenant des dispositifs annulateurs d'echo connectes en cascade, pouvant fonctionner independamment les uns des autres

Country Status (3)

Country Link
JP (1) JPS605634A (ja)
CA (1) CA1219649A (ja)
FR (1) FR2549320B1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471527A (en) 1993-12-02 1995-11-28 Dsc Communications Corporation Voice enhancement system and method

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8603247A (nl) * 1986-12-22 1988-07-18 At & T & Philips Telecomm Adaptief tijd-discreet filter voor het vormen van een compensatiesignaal uit synchrone datasymbolen.
JPH05227110A (ja) * 1992-02-14 1993-09-03 Nippon Television Network Corp Ｓｎｇ用サイドトーン抑圧装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1180141A (en) * 1980-11-15 1984-12-27 Kenzo Takahashi Echo canceller system
JPS5864830A (ja) * 1981-10-15 1983-04-18 Nippon Telegr & Teleph Corp <Ntt> 反響消去装置単位回路およびそれを用いた反響消去装置
JPS5784633A (en) * 1980-11-15 1982-05-27 Nippon Telegr & Teleph Corp <Ntt> Echo eraser

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5471527A (en) 1993-12-02 1995-11-28 Dsc Communications Corporation Voice enhancement system and method

Also Published As

Publication number Publication date
JPS6343015B2 (ja) 1988-08-26
FR2549320A1 (fr) 1985-01-18
JPS605634A (ja) 1985-01-12
CA1219649A (en) 1987-03-24

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Legal Events

Date Code Title Description
ST Notification of lapse