Implementation and evaluation of a real-time line echo bulk-delay estimator

Author

Ramkumar, Pradhyumnan ; Tanrikulu, Oguz

Author_Institution

Tellabs, Bedford, MA, USA

Volume

6

fYear

2000

fDate

2000

Firstpage

3650

Abstract

In applications of telephony in voice-over-IP, the delays associated with the line echoes vary significantly from call to call. Conventional line echo cancellers configured with a fixed bulk-delay yield poor performance under such conditions. This paper gives a detailed account of the implementation and evaluation of the automatic echo ranging (AER) algorithm used for bulk-delay estimation as well as its robustness and systems related issues

Keywords

Internet telephony; adaptive filters; adaptive signal processing; delay estimation; echo suppression; filtering theory; subscriber loops; telephone lines; transport protocols; automatic echo ranging algorithm; echo cancelling adaptive filter; fixed bulk-delay; line echo cancellers; line echoes; performance; real-time line echo bulk-delay estimator; telephone circuit; Adaptive filters; Circuits; Delay effects; Delay estimation; Dispersion; Echo cancellers; Finite impulse response filter; Internet telephony; Peak to average power ratio; Robustness;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on

Conference_Location

Istanbul

ISSN

1520-6149

Print_ISBN

0-7803-6293-4

Type

conf

DOI

10.1109/ICASSP.2000.860193

Filename

860193