Title :
A new sampling of echo paths in North American networks
Author :
Ho, K.C. ; Liu, Q.G. ; Rabipour, R. ; Yatrou, P.
Author_Institution :
Dept. of Electr. Eng., Missouri Univ., Columbia, MO, USA
Abstract :
Echo return loss and impulse response are important characteristics of an echo path for the design of echo cancellers. This paper presents methodology used to measure the impulse response and the echo return loss of an echo path. The design of the signal is described. We then present the measurement results from over 100 samplings of long distance calls which were made within North America. The measurement results are compared with the study reported by AT&T in 1972
Keywords :
echo suppression; quality of service; telephone networks; transient response; North American networks; echo paths; echo return loss; impulse response; sampling; Circuits; Delay; Echo cancellers; Intelligent networks; North America; Pulse measurements; Sampling methods; Standards development; Telephony; Testing;
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.2000.859083
