Improved adaptive CELP coder at 5.2 kbit/s

Shijun Yang Shijun Yang,Xixian Chen Xixian Chen

doi:10.1109/tencon.1993.327981

Improved adaptive CELP coder at 5.2 kbit/s

Shijun Yang Shijun Yang, Xixian Chen Xixian Chen

https://doi.org/10.1109/tencon.1993.327981

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Publication Date: Oct 19, 1993

Affiliation: Beijing University of Posts and Telecommunications

#Code-excited Linear Predictive Coder #Code-excited Linear Predictive + Show 8 more

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Abstract

The code-excited linear predictive (CELP) coder is considered to be a good candidate for speech coding at low bit rates. Although the speech quality of this coder is good, certain distortions can still be perceived. In the paper, the authors introduce some procedures to improve the performance of the CELP coder. They improve synthetic speech quality quite a lot both in objective (signal-to-noise ratio) and subjective (listening tests) measures. Experimental results revealed that the proposed CELP coder improved segmental SNR by nearly 3 dB over the conventional CELP coder at 5.2 kbit/s. >

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