Patent ID: 8605910
Filing Date: 2013-12-10
Classification: H04R,H04S

Abstract:
1. A device for determining a component signal that is suitable for a wave field synthesis system comprising an array of loudspeakers, the wave field synthesis system being configured to exploit an audio signal that is associated with a virtual source and that exists as a discrete signal sampled at an audio sampling frequency, and a source position associated with the virtual source, so as to calculate component signals for the loudspeakers on the basis of the virtual source while taking into account loudspeaker positions of loudspeakers of the array of loudspeakers, the device comprising: a provider for providing wave field synthesis parameters for the component signal to a loudspeaker of the array of loudspeakers while using the source position and while using a loudspeaker position of the loudspeaker of the array of loudspeakers at a parameter sampling frequency smaller than the audio sampling frequency, the wave field synthesis parameters comprising delay values; a wave field synthesis parameter interpolator for interpolating the wave field synthesis parameters so as to produce interpolated wave field synthesis parameters which are present at a parameter interpolation frequency that is higher than the parameter sampling frequency, the interpolated wave field synthesis parameters comprising integer portions of delay values and interpolated fractions of delay values, the interpolated fractions constituting delays which define fractions of sample intervals of the audio signal; and an audio signal processor comprising: the audio signal processor being configured to apply the interpolated fractions to the processed audio signal such that the component signal is calculated with fraction delays which correspond to the interpolated fractions.