SYSTEMS, METHODS, APPARATUS, AND COMPUTER-READABLE MEDIA FOR PROCESSING OF SPEECH SIGNALS USING HEAD-MOUNTED MICROPHONE PAIR
First Claim
Patent Images
1. A method of signal processing, said method comprising:
- producing a voice activity detection signal that is based on a relation between a first audio signal and a second audio signal; and
applying the voice activity detection signal to a signal that is based on a third audio signal to produce a speech signal,wherein the first audio signal is based on a signal produced (A) by a first microphone that is located at a lateral side of a user'"'"'s head and (B) in response to a voice of the user, andwherein the second audio signal is based on a signal produced, in response to the voice of the user, by a second microphone that is located at the other lateral side of the user'"'"'s head, andwherein the third audio signal is based on a signal produced, in response to the voice of the user, by a third microphone that is different from the first and second microphones, andwherein the third microphone is located in a coronal plane of the user'"'"'s head that is closer to a central exit point of the user'"'"'s voice than either of the first and second microphones.
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Abstract
A noise cancelling headset for voice communications contains a microphone at each of the user'"'"'s ears and a voice microphone. The headset shares the use of the ear microphones for improving signal-to-noise ratio on both the transmit path and the receive path.
182 Citations
40 Claims
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1. A method of signal processing, said method comprising:
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producing a voice activity detection signal that is based on a relation between a first audio signal and a second audio signal; and applying the voice activity detection signal to a signal that is based on a third audio signal to produce a speech signal, wherein the first audio signal is based on a signal produced (A) by a first microphone that is located at a lateral side of a user'"'"'s head and (B) in response to a voice of the user, and wherein the second audio signal is based on a signal produced, in response to the voice of the user, by a second microphone that is located at the other lateral side of the user'"'"'s head, and wherein the third audio signal is based on a signal produced, in response to the voice of the user, by a third microphone that is different from the first and second microphones, and wherein the third microphone is located in a coronal plane of the user'"'"'s head that is closer to a central exit point of the user'"'"'s voice than either of the first and second microphones. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for signal processing, said apparatus comprising:
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means for producing a voice activity detection signal that is based on a relation between a first audio signal and a second audio signal; and means for applying the voice activity detection signal to a signal that is based on a third audio signal to produce a speech signal, wherein the first audio signal is based on a signal produced (A) by a first microphone that is located at a lateral side of a user'"'"'s head and (B) in response to a voice of the user, and wherein the second audio signal is based on a signal produced, in response to the voice of the user, by a second microphone that is located at the other lateral side of the user'"'"'s head, and wherein the third audio signal is based on a signal produced, in response to the voice of the user, by a third microphone that is different from the first and second microphones, and wherein the third microphone is located in a coronal plane of the user'"'"'s head that is closer to a central exit point of the user'"'"'s voice than either of the first and second microphones. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. An apparatus for signal processing, said apparatus comprising:
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a first microphone configured to be located during a use of the apparatus at a lateral side of a user'"'"'s head; a second microphone configured to be located during the use of the apparatus at the other lateral side of the user'"'"'s head; a third microphone configured to be located during the use of the apparatus in a coronal plane of the user'"'"'s head that is closer to a central exit point of a voice of the user than either of the first and second microphones; a voice activity detector configured to produce a voice activity detection signal that is based on a relation between a first audio signal and a second audio signal; and a speech estimator configured to apply the voice activity detection signal to a signal that is based on a third audio signal to produce a speech estimate, wherein the first audio signal is based on a signal produced, in response to the voice of the user, by the first microphone during the use of the apparatus, and wherein the second audio signal is based on a signal produced, in response to the voice of the user, by the second microphone during the use of the apparatus, and wherein the third audio signal is based on a signal produced, in response to the voice of the user, by the third microphone during the use of the apparatus. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A non-transitory computer-readable storage medium having tangible features that cause a machine reading the features to:
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produce a voice activity detection signal that is based on a relation between a first audio signal and a second audio signal; and apply the voice activity detection signal to a signal that is based on a third audio signal to produce a speech signal, wherein the first audio signal is based on a signal produced (A) by a first microphone that is located at a lateral side of a user'"'"'s head and (B) in response to a voice of the user, and wherein the second audio signal is based on a signal produced, in response to the voice of the user, by a second microphone that is located at the other lateral side of the user'"'"'s head, and wherein the third audio signal is based on a signal produced, in response to the voice of the user, by a third microphone that is different from the first and second microphones, and wherein the third microphone is located in a coronal plane of the user'"'"'s head that is closer to a central exit point of the user'"'"'s voice than either of the first and second microphones. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification