SPEECH PROCESSING APPARATUS, CONTROL METHOD THEREOF, STORAGE MEDIUM STORING CONTROL PROGRAM THEREOF, AND VEHICLE, INFORMATION PROCESSING APPARATUS, AND INFORMATION PROCESSING SYSTEM INCLUDING THE SPEECH PROCESSING APPARATUS
First Claim
1. A speech processing apparatus comprising:
- a first microphone that inputs a first mixture sound including desired speech and noise, and outputs a first mixture signal;
a second microphone that is opened to the same sound space as that of said first microphone and disposed at a focus position of an interface that is part of a boundary of the sound space and has one of a quadratic surface shape and a pseudo surface shape approximating a quadratic surface, inputs a second mixture sound including the desired speech reflected by the interface and the noise reflected by the interface at a ratio different from the first mixture sound, and outputs a second mixture signal; and
a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal, and outputs a pseudo speech signal.
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Abstract
An apparatus of this invention is a speech processing apparatus that acquires pseudo speech from a mixture sound including desired speech and noise. The speech processing apparatus includes a first microphone that inputs a first mixture sound including desired speech and noise and outputs a first mixture signal, a second microphone that is opened to the same sound space as that of said first microphone and disposed at a focus position of an interface that is part of a boundary of the sound space and has one of a quadratic surface shape and a pseudo surface shape approximating a quadratic surface, inputs a second mixture sound including the desired speech reflected by the interface and the noise reflected by the interface at a ratio different from the first mixture sound, and outputs a second mixture signal, and a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal and outputs a pseudo speech signal.
19 Citations
13 Claims
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1. A speech processing apparatus comprising:
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a first microphone that inputs a first mixture sound including desired speech and noise, and outputs a first mixture signal; a second microphone that is opened to the same sound space as that of said first microphone and disposed at a focus position of an interface that is part of a boundary of the sound space and has one of a quadratic surface shape and a pseudo surface shape approximating a quadratic surface, inputs a second mixture sound including the desired speech reflected by the interface and the noise reflected by the interface at a ratio different from the first mixture sound, and outputs a second mixture signal; and a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal, and outputs a pseudo speech signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A control method of a speech processing apparatus including:
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a first microphone that inputs a first mixture sound including desired speech and noise, and outputs a first mixture signal; a second microphone that is opened to the same sound space as that of the first microphone, inputs a second mixture sound including the desired speech and the noise at a ratio different from the first mixture sound, and outputs a second mixture signal; and a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal, and outputs a pseudo speech signal, the method comprising; acquiring a parameter of the noise suppression circuit; and notifying, based on the parameter of the noise suppression circuit, whether a position of the second microphone is a focus position of an interface that is part of a boundary of the sound space and has one of a quadratic surface shape and a pseudo surface shape approximating a quadratic surface, at which the noise generated in the sound space is collected.
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13. A non-transitory computer-readable storage medium storing a control program of a speech processing apparatus including:
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a first microphone that inputs a first mixture sound including desired speech and noise, and outputs a first mixture signal; a second microphone that is opened to the same sound space as that of the first microphone, inputs a second mixture sound including the desired speech and the noise at a ratio different from the first mixture sound, and outputs a second mixture signal; and a noise suppression circuit that suppresses an estimated noise signal based on the first mixture signal and the second mixture signal, and outputs a pseudo speech signal, the control program causing a computer to execute; acquiring a parameter of the noise suppression circuit; and notifying, based on the parameter of the noise suppression circuit, whether a position of the second microphone is a focus position of an interface that is part of a boundary of the sound space and has one of a quadratic surface shape and a pseudo surface shape approximating a quadratic surface, at which the noise generated in the sound space is collected.
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Specification