Acoustic localization of a speaker
First Claim
Patent Images
1. A communication system adapted for a localization of a speaker in a room comprising:
- at least one loudspeaker configured to output sound such that the sound is at least partly reflected by the speaker;
a microphone array configured to;
detect the sound output by the at least one loudspeaker and reflected by the speaker, the sound output by the at least one loudspeaker in a direct path to the microphone array, and the sound output by the at least one loudspeaker and reflected by a surface other than the speaker; and
obtain microphone signals for each microphone comprising the microphone array;
a beamformer configured to obtain at least one beamformed signal from the microphone signals;
a filter configured to estimate, using the at least one beamformed signal, an impulse response of a system comprising the at least one loudspeaker, the room, and the microphone array;
wherein the impulse response is determined based on the at least one loudspeaker, the room, and the microphone array; and
a processor programmed to determine the speaker'"'"'s direction towards and/or distance from the microphone array based on the estimated impulse responses.
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Abstract
A system locates a speaker in a room containing a loudspeaker and a microphone array. The loudspeaker transmits a sound that is partly reflected by a speaker. The microphone array detects the reflected sound and converts the sound into a microphone array, the speaker'"'"'s distance from the microphone array, or both, based on the characteristics of the microphone signals.
45 Citations
12 Claims
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1. A communication system adapted for a localization of a speaker in a room comprising:
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at least one loudspeaker configured to output sound such that the sound is at least partly reflected by the speaker; a microphone array configured to; detect the sound output by the at least one loudspeaker and reflected by the speaker, the sound output by the at least one loudspeaker in a direct path to the microphone array, and the sound output by the at least one loudspeaker and reflected by a surface other than the speaker; and obtain microphone signals for each microphone comprising the microphone array; a beamformer configured to obtain at least one beamformed signal from the microphone signals; a filter configured to estimate, using the at least one beamformed signal, an impulse response of a system comprising the at least one loudspeaker, the room, and the microphone array; wherein the impulse response is determined based on the at least one loudspeaker, the room, and the microphone array; and a processor programmed to determine the speaker'"'"'s direction towards and/or distance from the microphone array based on the estimated impulse responses. - View Dependent Claims (2, 3)
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4. A communication system adapted for a localization of a speaker in a room comprising:
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at least one loudspeaker configured to output sound such that the sound is at least partly reflected by the speaker; a microphone array configured to detect the sound output by the at least one loudspeaker and reflected by the speaker, the sound output by the at least one loudspeaker in a direct path to the microphone array, and the sound output by the at least one loudspeaker and reflected by a surface other than the speaker; and
toobtain microphone signals for each of a plurality of microphones comprising the microphone array; a filter configured to estimate impulse responses of a system comprising the at least one loudspeaker, the room, and the microphone array for at least some of the microphone signals; wherein the impulse response is determined based on the at least one loudspeaker, the room, and the microphone array; a beamformer configured to beamform the estimated impulse responses to obtain at least one beamformed impulse response; and a processor programmed to determine the speaker'"'"'s direction towards Of and distance from the microphone array based on the at least one beamformed impulse response. - View Dependent Claims (5, 6, 7, 8, 9)
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10. A method localization of a speaker in a room, comprising:
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receiving microphone signals for each microphone in a microphone array, wherein the microphone array detects sound output by at least one loudspeaker and at least partly reflected by the speaker, sound output by the at least one loudspeaker in a direct path to the microphone array, and sound output by the at least one loudspeaker and reflected by a surface other than the speaker; and obtaining at least one beamformed signal from the microphone signals; estimating, using the at least one beamformed signal, an impulse response of a system comprising the at least one loudspeaker, the room, and the microphone array, wherein the impulse response is determined based on the at least one loudspeaker, the room, and the microphone array; and determining, using a computer processor, the speaker'"'"'s direction towards and/or distance from the microphone array based on the estimated impulse responses. - View Dependent Claims (11, 12)
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Specification