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, 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;
a first sound collector including a concave surface that collects the first mixture sound to said first microphone;
a second sound collector including a concave surface that collects the second mixture sound to said second microphone and disposed in a direction different from said first sound collector; 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.
1 Assignment
0 Petitions
Accused Products
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 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, a first sound collector including a concave surface that collects the first mixture sound to the first microphone, a second sound collector including a concave surface that collects the second mixture sound to the second microphone and disposed in a direction different from the first sound collector, 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. With this arrangement, it is possible to, in a single sound space where desired speech and noise mix, collect the desired speech and the noise, correctly estimate the noise, and reconstruct pseudo speech close to the desired speech.
-
Citations
29 Claims
-
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, 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; a first sound collector including a concave surface that collects the first mixture sound to said first microphone; a second sound collector including a concave surface that collects the second mixture sound to said second microphone and disposed in a direction different from said first sound collector; 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, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 26, 27, 28, 29)
-
-
24. A control method of a speech processing apparatus including:
-
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; a first sound collector including a concave surface that collects the first mixture sound to the first microphone; a second sound collector including a concave surface that collects the second mixture sound to the second microphone and disposed in a direction different from the first sound collector; 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; determining, in accordance with the parameter of the noise suppression circuit, a direction of the second sound collector to increase the ratio of the noise in the second mixture sound input to the second microphone; and controlling the direction of the second sound collector.
-
-
25. A non-transitory computer-readable storage medium storing a control program of a speech processing apparatus including:
-
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; a first sound collector including a concave surface that collects the first mixture sound to the first microphone; a second sound collector including a concave surface that collects the second mixture sound to the second microphone and disposed in a direction different from the first sound collector; 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; determining, in accordance with the parameter of the noise suppression circuit, a direction of the second sound collector to increase the ratio of the noise in the second mixture sound input to the second microphone; and controlling the direction of the second sound collector.
-
Specification