Application research of wavelet threshold noise reduction in coal mine voice communicatio

Autor:	ZHANG Miaofei, ZHANG Jianying, XU Changsheng
Jazyk:	čínština
Rok vydání:	2014
Předmět:	coal mine communication voice communication noise threshold noise reduction wavelet transform Mining engineering. Metallurgy TN1-997
Zdroj:	Gong-kuang zidonghua, Vol 40, Iss 1, Pp 50-54 (2014)
Druh dokumentu:	article
ISSN:	1671-251X 1671-251x
DOI:	10.13272/j.issn.1671-251x.2014.01.014
Popis:	According to characteristics of high-noise environment in underground coal mine, the paper put forward a new method which adds a wavelet threshold noise reduction module to voice communication terminals. The method improves soft and hard threshold of wavelet threshold noise reduction method, and constructs a new threshold function. The new function varies through a variable between soft and hard wavelet threshold function, so as to reduce the negative impact. The theoretical analysis results show that the application of wavelet threshold noise reduction can significantly improve quality of phone call and coal mine voice communication system.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/d5d2c255513b43368649c3839c64fa95 Zobrazit plný text záznamu View record in DOAJ