We present an alternative temporal approach for convolution, providing a new algorithm, called the taches-algorithm. Based on interferences between the successive delayed and amplified output signals associated respectively with the impulses constituting the input signal, the taches-algorithm can give access immediately to the new output sample and have a low latency response even without using vector-based optimisation of the calculation. With the taches-algorithm it seems easy to change (even in real-time) the impulse response while running the calculation, simply by updating the impulse response to use it for next samples, a task rather difficult to achieve using FFT convolution. Real-time audio demonstrations using notably Pure Data and simple explanations of the taches-algorithm will be given.
Authors:
Millot, Laurent; Pelé, Gérard
Affiliation:
IDEAT (Univ. Paris 1)/ENS Louis-Lumière
AES Convention:
124 (May 2008)
Paper Number:
7412
Publication Date:
May 1, 2008
Subject:
Signal Processing, Sound Quality Design
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