Title :
Implementation and evaluation of a real-time line echo bulk-delay estimator
Author :
Ramkumar, Pradhyumnan ; Tanrikulu, Oguz
Author_Institution :
Tellabs, Bedford, MA, USA
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Conference_Location :
Istanbul
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.860193
