期刊名称：International Journal of Computer Science & Technology
印刷版ISSN：2229-4333
电子版ISSN：0976-8491
出版年度：2013
卷号：4
期号：3
页码：7-12
语种：English
出版社：Ayushmaan Technologies
摘要：Speech coding is the process of creating a minimally redundant representation of the speech signal that can be efficiently transmitted over band-limited wired or wireless channels, and Decoding the signal with the best possible perceptual Quality. The speech transmission in wireless networks is associated with the reduction of extra information present in signal in such a way to preserve the quality and intelligibility of speech. It is known that the lower the bit rate the lesser the quality of the reconstructed speech however there is a constant quest to achieve a better speech quality at lower bit-rates. This paper attempts to implement evaluation criterion to assess the quality performance of advanced hybrid speech coding techniques by using Matlab simulation. This paper compares between three algorithms of advanced hybrid speech coding technique that are commonly applied in today’s applications. The three algorithms are (CELP), (G729-ANNEX A) and (G723.1). Analytical evaluations are applied for three algorithms to measure speech Quality in terms of bit rates they work on using SNR, SNRseg, Absolute Error, Mean Square Error, PESQ, LLR,WSS, Rating of speech distortion , rating of background noise, the predicted rating of overall quality.
关键词：Speech Coding;CELP;CSA-CELP;G729;Speech Quality and Analytical Evaluation
