Title :
A nonlinear acoustic echo cancellation scheme implementation using the blackfin microcomputer
Author_Institution :
Fac. of Electron., Telecommun. & Inf. Technol., Politeh. Univ. of Bucharest, Bucharest, Romania
Abstract :
Nonlinearity of amplifiers produces nonlinear echo in acoustic systems, which degrades the performance of audio communication. The paper presents an acoustic cancellation scheme that involve the least mean square (LMS) algorithm to update the parameters of the nonlinear function and the variable step size NLMS (VSS-NLMS) algorithm to determine the coefficient vector of the FIR filter. The performance analysis and the real time implementation using a digital signal processor (DSP) microcomputer (Blackfin BF533, form Analog Devices) are illustrated.
Keywords :
FIR filters; acoustic signal processing; audio equipment; audio signal processing; digital signal processing chips; echo suppression; least mean squares methods; Blackfin BF533; FIR filter; amplifier nonlinearity; audio communication; digital signal processor; least mean square algorithm; nonlinear acoustic echo cancellation; nonlinear function; Degradation; Digital signal processing; Digital signal processors; Echo cancellers; Finite impulse response filter; Least squares approximation; Microcomputers; Nonlinear acoustics; Performance analysis; Signal processing algorithms; Acoustic echo; digital signal processing; least mean square; variable step size;
Conference_Titel :
Telecommunication in Modern Satellite, Cable, and Broadcasting Services, 2009. TELSIKS '09. 9th International Conference on
Conference_Location :
Nis
Print_ISBN :
978-1-4244-4382-6
Electronic_ISBN :
978-1-4244-4383-3
DOI :
10.1109/TELSKS.2009.5339418
