Device and method for determining sound source direction
First Claim
1. A sound source direction determining device for specifying an incoming direction of a sound based on acoustic signals through two channels obtained by two sensors disposed apart from each other by a predetermined distance, the device comprising:
- a phase difference spectrum generating unit which obtains a phase difference spectrum of the acoustic signals through the two channels;
a power spectrum generating unit which obtains a power spectrum of at least either one of the acoustic signals through the two channels; and
a sound source direction specifying unit which obtains a sound source direction of each sound source, based on the phase difference spectrum and the power spectrum.
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Abstract
A sound source direction determining device for specifying the incoming direction of a sound based on acoustic signals through two channels obtained by two mikes disposed apart by a predetermined distance has a phase difference spectrum signal generating unit for obtaining the phase difference spectrum of the acoustic signals through the two channels, a power spectrum signal generating unit for obtaining the power spectrum of at least either one of the acoustic signals through the two channels, and a sound source direction specifying unit for obtaining the sound source direction of each sound source based on the phase difference spectrum and the power spectrum.
27 Citations
11 Claims
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1. A sound source direction determining device for specifying an incoming direction of a sound based on acoustic signals through two channels obtained by two sensors disposed apart from each other by a predetermined distance, the device comprising:
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a phase difference spectrum generating unit which obtains a phase difference spectrum of the acoustic signals through the two channels;
a power spectrum generating unit which obtains a power spectrum of at least either one of the acoustic signals through the two channels; and
a sound source direction specifying unit which obtains a sound source direction of each sound source, based on the phase difference spectrum and the power spectrum. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A sound source direction determining method for specifying an incoming direction of a sound based on acoustic signals through two channels obtained by two sensors disposed apart from each other by a predetermined distance, the method comprising:
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a first step of obtaining a phase difference spectrum of the acoustic signals through the two channels;
a second step of obtaining a power spectrum of at least either one of the acoustic signals through the two channels; and
a third step of obtaining a sound source direction of each sound source, based on the phase difference spectrum and the power spectrum.
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11. A computer-readable recording medium storing a program for controlling a computer to perform sound source direction determination for specifying an incoming direction of a sound based on acoustic signals through two channels obtained by two sensors disposed apart from each other by a predetermined distance,
wherein the sound source direction determination comprises: -
a first step of obtaining a phase difference spectrum of the acoustic signals through the two channels;
a second step of obtaining a power spectrum of at least either one of the acoustic signals through the two channels; and
a third step of obtaining a sound source direction of each sound source based on the phase difference spectrum and the power spectrum.
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Specification
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- Resources
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Current AssigneeCasio Computer Company Limited
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Original AssigneeCasio Computer Company Limited
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InventorsNakagomi, Kouichi
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Application NumberUS11/651,682Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current381/97CPC Class CodesH04R 3/005 for combining the signals o...
