An iterative inverse filter design method for the multichannel sound field reproduction system
To achieve a sound field reproduction system, it is important to design multichannel inverse filters which cancel tile effects of room transfer functions. The design method in the frequency domain based on the least-norm solution (LNS) requires less memory and less calculation than the design method in the time domain. However, the LNS method cannot guarantee the causality or stability of the filters. In this paper, a design method of a time-domain inverse filter using iterative e processing in the frequency domain fur multichannel sound field reproduction is proposed, and tile result of numerical analysis is described. The proposed method can decrease the squared error of every control point by. 3-12 dB. Furthermore, the sound reproduced by this method attains over 13 dB improvement in the segmental signal-noise ratio (SNR) compared with that designed by the LNS method for real environment impulse responses.
inverse filter multichannel sound field reproduction least-norm solution iterative processing