SOUND SOURCE IDENTIFICATION APPARATUS AND SOUND SOURCE IDENTIFICATION METHOD

• US 20170061981A1
• Filed: 08/03/2016
• Published: 03/02/2017
• Est. Priority Date: 08/27/2015
• Status: Active Grant

• Current Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Original Assignee: Honda Motor Co., Ltd. (Honda Motor Company)
• Inventors: Nakadai, Kazuhiro, Uemura, Satoshi
• Granted Patent: US 10,127,922 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01S 3/8006 Multi-channel systems specially adapted for direction-finding, i.e. having a single aerial system capable of giving simultaneous indications of the directions of different signals
• CPC Class Codes: G10L 2025/786 Adaptive threshold
• CPC Class Codes: G10L 21/028 using properties of sound source
• CPC Class Codes: G10L 25/84 for discriminating voice from noise

Abstract

A sound source identification apparatus includes a sound collection unit including a plurality of microphones, a sound source localization unit configured to localize a sound source on the basis of an acoustic signal collected by the sound collection unit, a sound source separation unit configured to perform separation of the sound source on the basis of the signal localized by the sound source localization unit, and a sound source identification unit configured to perform identification of a type of sound source on the basis of a result of the separation in the sound source separation unit, and a signal input to the sound source identification unit is a signal having a magnitude equal to or greater than a first threshold value which is a predetermined value.

Claims

1. A sound source identification apparatus, comprising:

a sound collection unit including a plurality of microphones;

a sound source localization unit configured to localize a sound source on the basis of an acoustic signal collected by the sound collection unit;

a sound source separation unit configured to perform separation of the sound source on the basis of the signal localized by the sound source localization unit; and

a sound source identification unit configured to perform identification of a type of sound source on the basis of a result of the separation in the sound source separation unit,

wherein a signal input to the sound source identification unit is a signal having a magnitude equal to or greater than a first threshold value which is a predetermined value.

2. The sound source identification apparatus according to claim 1,

wherein the sound source identification unit performs identification of a type of sound source on a signal in which a magnitude of the sound source is equal to or greater than the first threshold value when the sound source is detected using a second threshold value different from the first threshold value.

3. The sound source identification apparatus according to claim 2,

wherein the signal in which a magnitude of the sound source is equal to or greater than the first threshold value is a signal of a sound source localized by the sound source localization unit.

4. The sound source identification apparatus according to claim 2,

wherein the signal in which a magnitude of the sound source is equal to or greater than the first threshold value is a signal of a sound source separated by the sound source separation unit.

5. The sound source identification apparatus according to claim 1,

wherein the sound source identification unit performs estimation of a spectrum of noise included in the collected acoustic signal when the sound source is not detected, and determines the first threshold value on the basis of an estimated value of the estimated spectrum of the noise.

6. The sound source identification apparatus according to claim 5,

wherein the sound source identification unit calculates the first threshold value using addition average of the estimated value of the spectrum of the noise.

7. A sound source identification method, comprising:

a sound collection process in which a sound collection unit includes a plurality of microphones;

a sound source localization process in which a sound source localization unit localizes a sound source on the basis of an acoustic signal collected in the sound collection process;

a sound source separation process in which a sound source separation unit performs separation of the sound source on the basis of the signal localized in the sound source localization process; and

a sound source identification process in which a sound source identification unit performs identification of a type of sound source on the basis of a signal having a magnitude equal to or greater than a first threshold value which is a predetermined value among signals separated through the sound source separation process.