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Echo cancellation and applications

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3 Author(s)
Murano, K. ; Fujitsu Lab., Kanagawa, Japan ; Unagami, S. ; Amano, F.

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.<>

Published in:

Communications Magazine, IEEE  (Volume:28 ,  Issue: 1 )