SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR SOURCE LOCALIZATION USING AUDIBLE SOUND AND ULTRASOUND
First Claim
1. A method of signal processing, said method comprising:
- based on information from a first reflection of a first ultrasonic signal, estimating a first range of a sound-emitting object;
based on the estimated first range, selecting one among a plurality of direction-of arrival estimation operations; and
performing the selected direction-of-arrival estimation operation to calculate, based on information from an audio-frequency component of a multichannel signal, an estimate of a direction of arrival of the audio-frequency component.
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Abstract
A method of signal processing includes calculating a range based on information from a reflected ultrasonic signal. Based on the calculated range, one among a plurality of direction-of-arrival (DOA) estimation operations is selected. The method also includes performing the selected operation to calculate an estimated direction of arrival (DOA) of an audio-frequency component of a multichannel signal. Examples of DOA estimation operations include operations based on phase differences between channels of the multichannel signal and operations based on a difference in gain between signals that are based on channels of the multichannel signal.
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Citations
59 Claims
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1. A method of signal processing, said method comprising:
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based on information from a first reflection of a first ultrasonic signal, estimating a first range of a sound-emitting object; based on the estimated first range, selecting one among a plurality of direction-of arrival estimation operations; and performing the selected direction-of-arrival estimation operation to calculate, based on information from an audio-frequency component of a multichannel signal, an estimate of a direction of arrival of the audio-frequency component. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. An apparatus for signal processing, said apparatus comprising:
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means for estimating a first range of a sound-emitting object, based on information from a first reflection of a first ultrasonic signal; means for selecting one among a plurality of direction-of-arrival estimation operations, based on the estimated first range; and means for performing the selected direction-of-arrival estimation operation to calculate, based on information from an audio-frequency component of a multichannel signal, an estimate of a direction of arrival of the audio-frequency component. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. An apparatus for signal processing, said apparatus comprising:
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a range estimator configured to estimate a first range of a sound-emitting object, based on information from a first reflection of a first ultrasonic signal; a comparator configured to select one among a plurality of direction-of-arrival estimation operations, based on the estimated first range; and a direction calculator configured to perform the selected direction-of-arrival estimation operation to calculate, based on information from an audio-frequency component of a multichannel signal, an estimate of a direction of arrival of the audio-frequency component. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A non-transitory computer-readable storage medium having tangible features that cause a machine reading the features to:
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estimate a first range of a sound-emitting object, based on information from a first reflection of a first ultrasonic signal; select one among a plurality of direction-of-arrival estimation operations, based on the estimated first range; and perform the selected direction-of-arrival estimation operation to calculate, based on information from an audio-frequency component of a multichannel signal, an estimate of a direction of arrival of the audio-frequency component. - View Dependent Claims (55, 56, 57, 58, 59)
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Specification