Low bit-rate speech Coding-A comparative analysis.

M. Suleman Memon; Noman A.  Junejo; Naveed A.  Junejo

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Low bit-rate speech Coding-A comparative analysis.

Author(s)

M. Suleman Memon Department of CSE, Quest, Nawabshah, Pakistan

Noman A. Junejo Institute of IT, Mehran University of Engineering and Technology, Jamshoro, Pakistan

Naveed A. Junejo Institute of IT, Mehran University of Engineering and Technology, Jamshoro, Pakistan

Abstract

Low-bit rate speech codecs are used for making optimum use of available bandwidth. Such codecs are used in communication networks for cordless, mobile and cellular radio. Speech codecs are also used in multimedia conferencing applications over packet networks. Bandwidth economy is the main factor for using low bit rate codecs, whether for multiplexing several conversations over a single channel or for storing speech in application such as voice mailbox. High-quality speech is important in all of the mentioned applications. Hence it is necessary to choose a coder which can provide good quality speech at the lowest bit rate. The paper describes the details of ITU-T G.723.1 speech compression standard.G723.1 uses the Algebric Code Excited Linear Prediction (ACELP) and Multi purpose Maximum Likelihood Quantization (MP-MLQ) algorithm to compress a speech signal to 6.3 and 5.3 kbps. In this paper the Reference implementation of G.723.1 is used and results are obtained to compare its quality, coding delay and bandwidth consumption with other ITU-T G series coders.

Publication Details

Page(s) 53-58

DOI DOI not available

Published Journal: Quaid-e-Awam University Research Journal of Engineering, Science and Technology, Volume: 4, Issue: 182, Year: 2003

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