JPS642251B2 - - Google Patents

Info

Publication number
JPS642251B2
JPS642251B2 JP17801383A JP17801383A JPS642251B2 JP S642251 B2 JPS642251 B2 JP S642251B2 JP 17801383 A JP17801383 A JP 17801383A JP 17801383 A JP17801383 A JP 17801383A JP S642251 B2 JPS642251 B2 JP S642251B2
Authority
JP
Japan
Prior art keywords
circuit
loss
wire
output
line
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
JP17801383A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6070830A (ja
Inventor
Eiichi Amada
Kozo Kamata
Hirotoshi Shirasu
Juichi Morikawa
Hirohiko Sato
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi 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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP17801383A priority Critical patent/JPS6070830A/ja
Publication of JPS6070830A publication Critical patent/JPS6070830A/ja
Publication of JPS642251B2 publication Critical patent/JPS642251B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interface Circuits In Exchanges (AREA)
JP17801383A 1983-09-28 1983-09-28 鳴音制御方式 Granted JPS6070830A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17801383A JPS6070830A (ja) 1983-09-28 1983-09-28 鳴音制御方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17801383A JPS6070830A (ja) 1983-09-28 1983-09-28 鳴音制御方式

Publications (2)

Publication Number Publication Date
JPS6070830A JPS6070830A (ja) 1985-04-22
JPS642251B2 true JPS642251B2 (enrdf_load_html_response) 1989-01-17

Family

ID=16041032

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17801383A Granted JPS6070830A (ja) 1983-09-28 1983-09-28 鳴音制御方式

Country Status (1)

Country Link
JP (1) JPS6070830A (enrdf_load_html_response)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5742242A (en) * 1980-08-27 1982-03-09 Nec Corp Two-wire type bidirectional amplifier system

Also Published As

Publication number Publication date
JPS6070830A (ja) 1985-04-22

Similar Documents

Publication Publication Date Title
US4629829A (en) Full duplex speakerphone for radio and landline telephones
US8374851B2 (en) Voice activity detector and method
US7450714B2 (en) Echo canceller having improved non-linear processor
US5887059A (en) System and method for performing echo cancellation in a communications network employing a mixed mode LMS adaptive balance filter
US6192126B1 (en) Double talk detector, method for double talk detection and device incorporating such a detector
US20030007633A1 (en) Double-talk detector suitable for a telephone-enabled PC
US6064873A (en) Method and apparatus for controlling echo on both sides of a connection
JPS59225626A (ja) デ−タ伝送装置用エコ−キヤンセラ装置
US5909489A (en) Method of and circuit arrangement for improving the transmission properties of an echo affected transmission link in a telecommunications network
US7570608B2 (en) Echo canceller disabler for modulated data signals
JPH10164687A (ja) 適応反響補償の方法およびその配置
US7539300B1 (en) Echo canceller with enhanced infinite and finite ERL detection
JPS642251B2 (enrdf_load_html_response)
JP3303524B2 (ja) エコーキャンセラ学習方法
US7734036B1 (en) Dynamic attenuation method and apparatus for optimizing voice quality using echo cancellers
JPS6016773B2 (ja) 双方向通話検出器
JP3709739B2 (ja) 音声切換装置
JPH07303072A (ja) ダブルトーク検出方法および装置
JPH0648832B2 (ja) 双方向通話装置
KR100298454B1 (ko) 모뎀간의데이터송수신방법
JPH07303069A (ja) エコーキャンセラ学習方法
JPS59229964A (ja) 音声スイツチ回路
JPH10224273A (ja) 劣化判断・信号検出回路
JPH05110694A (ja) 音声加算装置
JPS6155293B2 (enrdf_load_html_response)