文章基本信息

标题：Speech Compression and Enhancement using Wavelet Coders
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作者：Mishra, S. K. ; Trivedi, A ; Mishra, G. R 等
期刊名称：International Journal of Electronics Communication and Computer Engineering
印刷版ISSN：2249-071X
电子版ISSN：2278-4209
出版年度：2012
卷号：3
期号：6
页码：1368-1372
出版社：IJECCE
摘要：In the field of communication system there is always a trade-off between compression ratio (CR) and quality of signal when it comes to the lossy compression technique. In digital telephony system speech compression and high-quality of speech is crucial, because with a very limited bandwidth, service is provided with a huge number of users, so to improve the efficiency of bandwidth and for higher SNR an effective speech coder is required. In recent years discrete wavelet transform (DWT) emerged as a very effective technique for image and speech signal analysis. This paper presents wavelet compression technique by which the ratio of compression and signal to noise of a speech signal can be balanced. The results have been simulated on Mat Lab toolbox 7.10, clearly displays the values of SNR and CR for male and female speech signals using Haar and db6 wavelet
关键词：Signal to Noise Ratio; Discrete Wavelet Transform; Wavelet coefficient and Compression Ratio