Method and system for artificial reverberation using modal decomposition
OwnerJonathan S. Abelinventor
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Abstract
In general, the present invention relates to a method and system for synthesizing artificial reverberation using modal analysis of a room or resonating object. In one embodiment of the inventive system, a collection of resonant filters is employed, each driven by the source signal, and their outputs summed. With filter resonance frequencies and dampings tuned to the modal frequencies and decay times of the acoustic space or resonating object being simulated, and filter gains set according to the source and listener positions within the space or object, any number of acoustic spaces and resonant objects may be simulated.
Claims19
A method implemented by a computer, comprising:
- receiving a source signal;
- applying, by the computer, artificial reverberation to the source signal by processing the source signal in parallel using a plurality of mode filters, wherein the plurality of mode filters have respective amplitudes that have been adapted in accordance with a change between first and second source positions associated with the source signal, and wherein adapting the respective amplitudes includes performing a fit using mode amplitudes obtained from a plurality of different measured impulse responses from a corresponding plurality of source positions, the fit being performed in accordance with the change between the first and second source positions;
- and
- summing outputs of the plurality of mode filters to produce an artificially reverberated version of the source signal.
A method implemented by a computer, comprising:
- configuring parameters of a plurality of mode filters in accordance with desired properties of one of a room and a resonating object, wherein configuring includes obtaining a measured impulse response of the one of the room and the resonating objects and determining the parameters using the obtained measured impulse response;
- receiving a source signal;
- applying, by the computer, artificial reverberation to the source signal by processing the source signal in parallel using the plurality of mode filters;
- and
- summing outputs of the plurality of mode filters to produce an artificially reverberated version of the source signal.
Dependencies are inferred from the claim text.