Title :
A memory-efficient algorithm for network echo cancellation in VoIP systems
Author_Institution :
Intel Corp., San Jose, CA, USA
Abstract :
In recent years, considerable interest has been focused on voice-over-IP (VoIP) systems. VoIP media gateways implement voice and packet processing for hundreds of channels. One of the limiting factors in such high channel-density voice processing applications is the memory requirement. A substantial amount of memory is used to store the coefficients of the network echo canceller. This paper describes a new algorithm that reduces the memory requirements for echo cancellation by a factor of 2 to 4. When the new memory reduction algorithm is combined with standard NLMS, it also provides faster convergence rate, and better echo path tracking than the standard NLMS algorithm.
Keywords :
Internet telephony; acoustic signal processing; convergence of numerical methods; echo suppression; least mean squares methods; storage management; NLMS; VoIP systems; convergence rate; echo path tracking; media gateways; memory-efficient algorithm; network echo cancellation; network echo canceller; packet processing; voice processing; voice-over-IP; Communication networks; Convergence; Echo cancellers; IP networks; Intelligent networks; Internet telephony; Limiting; Signal processing; Signal processing algorithms; Time division multiplexing;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2004. Proceedings. (ICASSP '04). IEEE International Conference on
Print_ISBN :
0-7803-8484-9
DOI :
10.1109/ICASSP.2004.1326789
