Echo cancellation and applications

Author

Murano, Kazuo ; Unagami, Shigeyuki ; Amano, Fumio

Author_Institution

Fujitsu Lab., Kanagawa, Japan

Volume

28

Issue

1

fYear

1990

Firstpage

49

Lastpage

55

Abstract

Practical echo cancellation techniques, in particular, those used in telecommunications, are reviewed. The various situations in which echoes are generated are examined. Echo path modeling techniques and adaptive algorithms for coefficient control are reviewed. Current international standardization activities are discussed, and echo canceler implementation considerations are set forth. These include echo cancelers for telephone circuits, echo cancelers for full-duplex data transmission over voice channels, acoustic echo cancelers, and echo cancelers for ISDN digital loop transmission.<>

Keywords

ISDN; adaptive filters; data communication systems; echo suppression; standardisation; telephony; ISDN digital loop transmission; acoustic echo cancelers; adaptive algorithms; adaptive filtering; coefficient control; echo cancellation; echo path modelling; full-duplex data transmission; international standardization activities; telecommunications; telephone circuits; voice channels; Acoustic waves; Adaptive filters; Echo cancellers; Finite impulse response filter; Hybrid power systems; Large scale integration; Loudspeakers; Microphones; Telecommunications; Telephony;

fLanguage

English

Journal_Title

Communications Magazine, IEEE

Publisher

ieee

ISSN

0163-6804

Type

jour

DOI

10.1109/35.46671

Filename

46671