Title :
Beamforming with Optimized Interpolated Microphone Arrays
Author :
Doblinger, Gerhard
Author_Institution :
Inst. of Commun. & Radio-Freq. Eng., Vienna Univ. of Technol., Vienna
Abstract :
We present an optimization procedure for wideband beam- forming with interpolated arrays. We intend to design a beam- former with a compact size. In addition, we want to reduce the number of sensors while maintaining a good beamforming performance. Our beamformers are implemented using FFT filterbanks. Performance is tested under far-field conditions and under sound propagation with simulated room impulse responses. In addition, we study the influence of sensor noise on the beamforming behavior.
Keywords :
array signal processing; audio signal processing; channel bank filters; fast Fourier transforms; interpolation; microphone arrays; transient response; FFT filterbank; far-field condition; impulse response; interpolated microphone array; optimization procedure; sensor noise; sound propagation; wideband beamforming; Acoustic noise; Acoustic sensors; Array signal processing; Extrapolation; Interpolation; Microphone arrays; Sensor arrays; Signal mapping; Vectors; Wideband; Array signal processing; array interpolation; microphone arrays;
Conference_Titel :
Hands-Free Speech Communication and Microphone Arrays, 2008. HSCMA 2008
Conference_Location :
Trento
Print_ISBN :
978-1-4244-2337-8
Electronic_ISBN :
978-1-4244-2338-5
DOI :
10.1109/HSCMA.2008.4538681
