A 2.4kb/s Speech Coder with Improved Analysis and Synthesis Based on MELP

Qiang Li; Xiao Hong Zhang; Xu Jiu Xia; Hao Ran Zhang

doi:10.4028/www.scientific.net/AMM.401-403.1264

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 401-403A 2.4kb/s Speech Coder with Improved Analysis and...

A 2.4kb/s Speech Coder with Improved Analysis and Synthesis Based on MELP

Abstract:

This paper describes a speech coder which has an input signal frame interval of 20ms percent in duration, contains 160 voice samples (8,000 samples/s) and 48 bits. A key feature of the coder is a novel Line Spectral Frequencies (LSF) quantization scheme, requiring only 19 bits per frame. This new coder, through algorithmic improvements, enhanced quantization techniques and new harmonic synthesis method, produces better speech quality at 2.4 kb/s transnission rate than the new U.S. Federal Standard MELP coder.

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Periodical:

Applied Mechanics and Materials (Volumes 401-403)

Pages:

1264-1267

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.401-403.1264

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Online since:

September 2013

Authors:

Qiang Li, Xiao Hong Zhang, Xu Jiu Xia, Hao Ran Zhang

Keywords:

LSF Quantization, MELP, Speech Coder

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References

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