Real-time partitioned convolution for Ambiophonics surround sound
Anders Torger, Angelo Farina · 2002
Ambiophonics, as one of the most realistic music reproduction methods, requires multi-channel convolution with very long impulse responses for creation of believable reverberation. It is shown how the heavy processing task required for a real-time Ambiophonics system, or similar convolution-intensive system, can be handled by a low-cost personal computer, by means of partitioned convolution. The only theoretical advantage of partitioned convolution is that it provides low input/output delay. However, since the intensive part of it is very easily made optimal for the target platform, which normally is not the case for the standard overlap-and-save algorithm, it often provides the fastest convolution as well.