Patent ID: 8965546
Filing Date: 2015-02-24
Classification: H04R,H04S

Abstract:
1. A method of audio signal processing, said method comprising: spatially processing a first audio signal to generate a first plurality M of imaging signals; for each of the first plurality M of imaging signals, applying a corresponding one of a first plurality M of driving signals to a corresponding one of a first plurality M of loudspeakers of a first array, wherein the driving signal is based on the imaging signal; harmonically extending a second audio signal that includes energy in a first frequency range to produce an extended signal that includes harmonics, in a second frequency range that is higher than the first frequency range, of said energy of the second audio signal in the first frequency range; spatially processing an enhanced signal that is based on the extended signal to generate a second plurality N of imaging signals; and for each of the second plurality N of imaging signals, applying a corresponding one of a second plurality N of driving signals to a corresponding one of a second plurality N of loudspeakers of the first array, wherein the driving signal is based on the imaging signal, and wherein a distance between adjacent ones of the first plurality M of loudspeakers is less than a distance between adjacent ones of the second plurality N of loudspeakers.