Title :
Echo cancellation for voice over ATM
Author :
El Malki, K. ; Cvetkovic, Srba ; Smythe, Colin
Author_Institution :
Dept. of Comput. Sci., Sheffield Univ., UK
Abstract :
This paper analyses the effect of voice transport over asynchronous transfer mode (ATM) adaptation layer 1 (AAL1) technology when ATM-based echo cancellation is used. The effects of cell delay variation (CDV) and cell loss are analysed and simulated on an NLMS-based (Normalised least mean squared) echo canceller. These results demonstrate that it is important for an ATM-based echo canceller to process not only ATM-layer functionality, as proposed previously in the literature, but also a limited number of ATM adaptation layer 1 (AAL1) functions
Keywords :
asynchronous transfer mode; broadband networks; echo suppression; voice communication; ATM adaptation layer 1; ATM-based echo cancellation; ATM-layer functionality; NLMS-based echo canceller; asynchronous transfer mode; cell delay variation; cell loss; normalised least mean squared based canceller; voice transport; Added delay; Asynchronous transfer mode; B-ISDN; Circuits; Digital signal processing; Echo cancellers; Echo interference; Finite impulse response filter; Signal processing; Telephony;
Conference_Titel :
Microwave Conference, 1999 Asia Pacific
Print_ISBN :
0-7803-5761-2
DOI :
10.1109/APMC.1999.833705
