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Four-channel array sound source positioning system based on neural network

A neural network, sound source localization technology, applied in localization, radio wave measurement systems, measurement devices, etc., can solve problems such as the inability to achieve dexterous human interaction, the positioning error of classical signal processing methods, etc.

Inactive Publication Date: 2014-02-12
姜楠
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: at a lower sampling rate, the classical signal processing method has a large error for positioning, and cannot realize dexterous human interaction

Method used

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  • Four-channel array sound source positioning system based on neural network
  • Four-channel array sound source positioning system based on neural network
  • Four-channel array sound source positioning system based on neural network

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Embodiment Construction

[0020] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] The present invention is based on pickup array sampling, circuit synchronous fidelity processing, digital acquisition card for analog-to-digital conversion, and a system for obtaining sound source position information through software algorithm processing signals, such as figure 1 shown.

[0022] The whole system is mainly realized by hardware and software.

[0023] Hardware circuit:

[0024] The main goal is to collect multiple broadband near-field audio signals (such as image 3 ). Provide a physical basis for the realization of subsequent models. Among them, the focus is on the performance improvement of multi-channel synchronization and signal phase fidelity. Realize the acquisition of the signal from the sound wave to the sensor, through the fidelity circuit, synchronous multi-channel acquisition and amplification, an...

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Abstract

The invention discloses a sound positioning system design which can be used for human-computer interaction to replace keyboard input and is based on an array microphone. The sound source positioning technology of a microphone array refers to an array consisting of a plurality of microphones which are arranged according to a certain geometric structure. The same sound source arrives at different microphones at different time. Time delay when the sound source arrives at the different microphones is collected so as to calculate the position of the sound source and represent different function commands; an upper computer sends a corresponding action response to realize human-computer interaction. Sounds produced when fingers rap a desktop are collected; on the basis of a classic time delay estimation algorithm, a time delay estimation result is processed in combination with a BP neural network, a positioning position is determined, and an input key value, namely the keys the fingers click on, is obtained. As a result, a traditional PC keyboard can be replaced to some extent, and human-computer interaction of command input is realized.

Description

technical field [0001] The invention relates to digital signal processing, embedded system design, etc., and in particular to multi-channel signal source positioning technology. Background technique [0002] In the past few decades, human-computer interaction technology has changed with each passing day, especially with the popularization and extension of electronic automation equipment, it has brought exponential rapid development to the development of embedded human-computer interaction methods. How to interact with the computer through various input and output devices is an important content of multimedia technology research. The development of acoustic keyboard and acoustic input technology will help promote the progress of computer input equipment. With the continuous optimization and improvement of new technologies, the low cost of product input equipment, low power consumption, environmental protection and convenience will bring considerable economic and social benef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 姜楠赛音傅洋张超
Owner 姜楠
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