SYSTEMS, METHODS, AND APPARATUS FOR ENHANCED ACOUSTIC IMAGING
First Claim
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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 an 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 array, wherein the driving signal is based on the imaging signal.
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Abstract
Methods, systems, and apparatus for using a psychoacoustic-bass-enhanced signal to drive an array of loudspeakers are disclosed.
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Citations
52 Claims
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1. A method of audio signal processing, said method comprising:
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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 an 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 array, wherein the driving signal is based on the imaging signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for audio signal processing, said apparatus comprising:
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means for spatially processing a first audio signal to generate a first plurality M of imaging signals; means for applying, for each of the first plurality M of imaging signals, a corresponding one of a first plurality M of driving signals to a corresponding one of a first plurality M of loudspeakers of an array, wherein the driving signal is based on the imaging signal; means for 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; means for spatially processing an enhanced signal that is based on the extended signal to generate a second plurality N of imaging signals; and means for applying, for each of the second plurality N of imaging signals, a corresponding one of a second plurality N of driving signals to a corresponding one of a second plurality N of loudspeakers of the array, wherein the driving signal is based on the imaging signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. An apparatus for audio signal processing, said apparatus comprising:
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a first spatial processing module configured to spatially process a first audio signal to generate a first plurality M of imaging signals; an audio output stage configured to apply, for each of the first plurality M of imaging signals, a corresponding one of a first plurality M of driving signals to a corresponding one of a first plurality M of loudspeakers of an array, wherein the driving signal is based on the imaging signal; a harmonic extension module configured to harmonically extend 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; and a second spatial processing module configured to spatially process an enhanced signal that is based on the extended signal to generate a second plurality N of imaging signals, wherein said audio output stage is configured to apply, for each of the second plurality N of imaging signals, a corresponding one of a second plurality N of driving signals to a corresponding one of a second plurality N of loudspeakers of the array, wherein the driving signal is based on the imaging signal. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A non-transitory computer-readable storage medium having tangible features that when read by a machine cause the machine to:
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spatially process a first audio signal to generate a first plurality M of imaging signals; apply, for each of the first plurality M of imaging signals, a corresponding one of a first plurality M of driving signals to a corresponding one of a first plurality M of loudspeakers of an array, wherein the driving signal is based on the imaging signal; harmonically extend 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 process an enhanced signal that is based on the extended signal to generate a second plurality N of imaging signals; and apply, for each of the second plurality N of imaging signals, a corresponding one of a second plurality N of driving signals to a corresponding one of a second plurality N of loudspeakers of the array, wherein the driving signal is based on the imaging signal
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Specification