Title :
Parallel implementation of the frequency bin adaptive-filter for acoustical echo cancellation
Author :
Gan, W.S. ; Chong, Y.K.
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Abstract :
This paper examines the parallel implementation of the new frequency-bin adaptive filter (FBAF) algorithm using the Texas Instruments´ TMS320C40 parallel digital signal processors (pDSP) in the acoustical echo cancellation environment. The FBAF is very similar to the conventional frequency domain adaptive filter (FDAF), except that it utilizes a shorter data block, thus reduces the transmission delay which is inherent in the FDAF algorithm. Furthermore, in the FBAF, each frequency bin is processed by an independent finite impulse response (FIR) filter and therefore is very suitable for parallel implementation. We present a real-time system implementation and results of the parallel FBAF algorithm using the data parallelisation approach
Keywords :
FIR filters; acoustic signal processing; adaptive filters; adaptive signal processing; digital filters; digital signal processing chips; echo suppression; parallel algorithms; FIR filter; TMS320C40 parallel DSP; Texas Instruments; acoustical echo cancellation; data parallelisation approach; finite impulse response filter; frequency bin adaptive-filter; frequency domain adaptive filter; parallel FBAF algorithm; parallel digital signal processors; parallel implementation; real-time system; transmission delay; Adaptive filters; Convolution; Degradation; Delay; Digital signal processors; Echo cancellers; Finite impulse response filter; Frequency; Reverberation; Signal processing algorithms;
Conference_Titel :
Information, Communications and Signal Processing, 1997. ICICS., Proceedings of 1997 International Conference on
Print_ISBN :
0-7803-3676-3
DOI :
10.1109/ICICS.1997.652079
