Title :
Maximally diffusive yet efficient feedback delay networks for artificial reverberation
Author :
Rocchesso, Davide
Author_Institution :
Dipt. di Elettronica e Inf., Padova Univ., Italy
Abstract :
Feedback delay networks are widely used for simulating the diffuse part of reverberation in a room. We present particular choices of the feedback coefficients, namely Galois sequences arranged in a circulant matrix, to produce a maximum echo density in the time response. These specific sets of coefficients give implementations having a low number of multipliers, and the resulting circuit can be efficiently pipelined. The resulting networks are compared with other efficient implementations.
Keywords :
acoustic delay lines; acoustic signal processing; architectural acoustics; circuit feedback; matrix algebra; reverberation; sequences; Galois sequences; acoustic signal processing; artificial reverberation; circulant matrix; delay lines; efficient feedback delay networks; feedback coefficients; maximally diffusive feedback delay networks; maximum echo density; multipliers; pipelined circuit; room reverberation; time response; Acoustic signal processing; Circuits; Delay lines; Eigenvalues and eigenfunctions; Feedback; Filters; Propagation delay; Reverberation; Time factors; Transmission line matrix methods;
Journal_Title :
Signal Processing Letters, IEEE
