Apparatus and method for processing acoustic signal

一种声音信号、声音信号处理的技术，应用在传声器信号组合、测量装置、使用超声波/声波/次声波的测向仪等方向，能够解决不能适用各种各样的声音、声源限制、声源数目不能被设置在不低于麦克风数目等问题

Inactive Publication Date: 2006-09-27
KK TOSHIBA
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Problems solved by technology

However, since the estimation of the number of sound sources, directions, and sound sources is performed according to the harmonic structure, the sound sources that can be processed are limited to sounds such as human voice having a harmonic structure, and this method cannot be applied to various sound
[0006] Therefore, in the conventional method, there are contradictory problems that (1) when the sound source is not restricted, the number of sound sources cannot be set at a number not lower than the number of microphones, and (2) when the sound source When the number of is set to a number not lower than the number of microphones, there are restrictions on the sound source, for example assuming a harmonic structure
Currently, no system has been developed that can handle the number of sound sources no less than the number of microphones without limiting the sound sources

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  • Apparatus and method for processing acoustic signal
  • Apparatus and method for processing acoustic signal
  • Apparatus and method for processing acoustic signal

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Embodiment Construction

[0042] Various embodiments of the present invention will be described below with reference to the accompanying drawings.

[0043] Such as figure 1As shown, the sound signal processing device according to the embodiment of the present invention includes n (n is a natural number equal to or greater than 2) microphones 1a to 1c, sound signal input unit 2, frequency decomposition unit 3, two-dimensional data generation unit 4, graphic Detection unit 5 , pattern matching unit 6 , sound source information generation unit 7 , output unit 8 and user interface unit 9 .

[0044] [Basic concept of sound source estimation based on phase difference in each frequency component]

[0045] The microphones 1a to 1c are arranged in a medium such as air at predetermined intervals. The microphones 1a to 1c convert medium vibrations (sound waves) at different n points into electrical signals (sound signals). The microphones 1a to 1c form different m pairs of microphones (m is a natural number gr...

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Abstract

An acoustic signal processing apparatus includes an acoustic signal input device, a frequency resolution device, a two-dimensional data generating device, a graphics detection device, a sound source candidate information generating device, and a sound source information generating device. The sound source information generating device generates sound source information including at least one of the number of sound sources, the spatial existence range of the sound source, an existence period of the voice, a frequency component configuration of the voice, amplitude information on the voice, and symbolic contents of the voice based on the sound source candidate information and corresponding information which are generated by the sound source candidate information generating device.

Description

technical field [0001] The present invention relates to sound signal processing, and more particularly to the estimation of the number of sound sources propagating through a medium, the direction of the sound sources, the frequency components of the sound waves from the sound sources, and the like. Background technique [0002] In recent years, in the field of robotic hearing research, a sound source localization and separation system has been proposed. In this system, the number of multiple target sound sources and the direction of the target sound sources are estimated in a noise environment (sound source localization), and each source sound is separated and extracted (sound source separation). For example, F. Asano, "dividing sounds" Instrument and Control vol.43, No.4, p325-330 (2004) discloses a method in which N sources are observed by M microphones in an environment with background noise sound, a spatial correlation matrix is ​​generated from data in which fast Fouri...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/808G01S5/20G10L21/02G06F17/00G10L15/28G10L21/028
CPCH04R3/005H04S7/40G10L21/0272
Inventor 铃木薰古贺敏之
Owner KK TOSHIBA
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