期刊名称：International Journal of Computer Trends and Technology
电子版ISSN：2231-2803
出版年度：2013
卷号：4
期号：5-3
页码：1251-1257 出版社：Seventh Sense Research Group
摘要：Audio compression is done in order to minimize the memory requirements of an audio file. This paper presents a novel idea to achieve this by reducing the bit rate of a speech signal without compromising with perceptual quality.LPC coding is the most preferred technique but it provides the loss of information. By selecting an efficient technique of wavelet transform, we apply compression on speech signal using MATLAB software on a core 2duo processor based computing device. The different families of wavelet are used in order to extract data such as compression scores and energy levels of an acoustic signal. The simulation results are taken with different wavelets on 8bit and 16bit signal. These simulation comparisons would represent the efficiency of a particular family and thus our aim of less memory consumption by reducing the bit rate of an audio file without effecting the quality and integrity of the signal is achieved.
关键词：Compression score; Energy Level; Bit rate; Matlab; Wavelet transform
