Device and method for voice activity detection based on the direction from which sound signals emanate
First Claim
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1. A device for voice activity detection, comprising:
- a sound signal analyser configured to determine whether a sound signal comprises speech, comprising;
a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system, wherein the microphone system is configured to determine the direction of a sound source causing a sound signal, is configured to further analyse the sound signal to determine whether the sound signal comprises speech when the sound signal emanates from a first range of directions, and is configured to determine that the sound signal does not comprise speech and perform no frequency spectral processing of the sound signal when the sound signal emanates from a second, different range of directions;
wherein the first range of directions is directed in a direction of an intended user'"'"'s mouth.
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Abstract
A device includes a sound signal analyser configured to determine whether a sound signal comprises speech. The device further includes a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system so that sounds only emanating from a range of directions are included as signals possibly containing speech.
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Citations
23 Claims
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1. A device for voice activity detection, comprising:
a sound signal analyser configured to determine whether a sound signal comprises speech, comprising; a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system, wherein the microphone system is configured to determine the direction of a sound source causing a sound signal, is configured to further analyse the sound signal to determine whether the sound signal comprises speech when the sound signal emanates from a first range of directions, and is configured to determine that the sound signal does not comprise speech and perform no frequency spectral processing of the sound signal when the sound signal emanates from a second, different range of directions; wherein the first range of directions is directed in a direction of an intended user'"'"'s mouth. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An accessory for a mobile apparatus, comprising:
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a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system, wherein the microphone system is configured to determine the direction of a sound source causing sound a sound, is configured to further analyse the sound signal to determine whether the sound signal comprises speech when the sound signal emanates from a first range of directions, and is configured to determine that the sound signal does not comprise speech and perform no frequency spectral processing of the sound signal when the sound signal emanates from a second, different range of directions; wherein the direction of the first range of directions is adjustable. - View Dependent Claims (16, 17)
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18. A method for voice activity detection, comprising performing operations as follows such that at least a portion of at least one of the operations is performed on at least one processor:
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receiving sound signals from a microphone system configured to discriminate sounds emanating from sources located in different directions from the microphone system; determining the direction of the sound source causing the sound signals; analyzing the sound signals to determine whether the sound signals comprise speech when the sound signals emanate from a first range of directions determining that the sound signals to do not comprise speech and performing no frequency spectral processing of the sound signals when the sound signals emanate from a second, different range of directions; wherein the first range of directions is directed in the direction of an intended user'"'"'s mouth. - View Dependent Claims (19, 20, 21, 22, 23)
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Specification