Title :
A new echo canceller with the estimation of flat delay
Author :
Feng, Li ; Li, Fan
Author_Institution :
Nanjing Univ. of Posts & Telecommun., China
Abstract :
An echo canceller with flat delay estimation is described. It consists of flat delay estimation and a 64-tap echo canceller with time delay. The cross-correlation method is adopted to estimate the flat delay and the complexity of calculation is decreased for real-time processing according to the characteristics of the echo path. Simulation results indicate good performance in convergence rate and tracking capability for the time variant echo path. A block diagram of the hardware and a flowchart of the program are included
Keywords :
convergence; correlation methods; digital filters; echo suppression; telecommunication equipment; 64-tap echo canceller; FIR filters; convergence rate; cross-correlation method; echo canceller; echo path; flat delay estimation; flowchart; hardware; real-time processing; time variant echo path; tracking capability; Circuits; Convergence; Degradation; Delay effects; Delay estimation; Echo cancellers; Finite impulse response filter; Flowcharts; Hardware; Phase estimation;
Conference_Titel :
TENCON '92. ''Technology Enabling Tomorrow : Computers, Communications and Automation towards the 21st Century.' 1992 IEEE Region 10 International Conference.
Conference_Location :
Melbourne, Vic.
Print_ISBN :
0-7803-0849-2
DOI :
10.1109/TENCON.1992.271995
