JPS6253974B2 - - Google Patents

Info

Publication number
JPS6253974B2
JPS6253974B2 JP22428983A JP22428983A JPS6253974B2 JP S6253974 B2 JPS6253974 B2 JP S6253974B2 JP 22428983 A JP22428983 A JP 22428983A JP 22428983 A JP22428983 A JP 22428983A JP S6253974 B2 JPS6253974 B2 JP S6253974B2
Authority
JP
Japan
Prior art keywords
signal
echo canceller
echo
sine wave
impulse response
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
JP22428983A
Other languages
English (en)
Japanese (ja)
Other versions
JPS60117928A (ja
Inventor
Shigeyuki Umigami
Masami Koshikawa
Tatsuki Hayashi
Yutaka Moryama
Masaharu Shimada
Kyohisa Wakabayashi
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP22428983A priority Critical patent/JPS60117928A/ja
Publication of JPS60117928A publication Critical patent/JPS60117928A/ja
Publication of JPS6253974B2 publication Critical patent/JPS6253974B2/ja
Granted 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
    • H04B3/238—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)
JP22428983A 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式 Granted JPS60117928A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22428983A JPS60117928A (ja) 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22428983A JPS60117928A (ja) 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式

Publications (2)

Publication Number Publication Date
JPS60117928A JPS60117928A (ja) 1985-06-25
JPS6253974B2 true JPS6253974B2 (enrdf_load_html_response) 1987-11-12

Family

ID=16811437

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22428983A Granted JPS60117928A (ja) 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式

Country Status (1)

Country Link
JP (1) JPS60117928A (enrdf_load_html_response)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0821882B2 (ja) * 1987-11-20 1996-03-04 株式会社日立製作所 ハンズフリー電話機
US4887288A (en) * 1988-12-28 1989-12-12 American Telephone And Telegraph Company Self calibration arrangement for a voice switched speakerphone
US5007046A (en) * 1988-12-28 1991-04-09 At&T Bell Laboratories Computer controlled adaptive speakerphone
US4959857A (en) * 1988-12-28 1990-09-25 At&T Bell Laboratories Acoustic calibration arrangement for a voice switched speakerphone

Also Published As

Publication number Publication date
JPS60117928A (ja) 1985-06-25

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