Performance of the CELP speech codec in channel with common fading

Author

Dahan, S. ; Lyandres, V. ; Wulich, D.

Author_Institution

Dept. of Electr. Eng. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel

fYear

1996

Firstpage

44

Lastpage

47

Abstract

We present results of simulation of a low-bit rate speech transmission system in a channel with common Rayleigh fading. The system uses code-excited linear voice prediction (CELP) and the channel errors correction. The quality of the speech restoration provided by the system is estimated with the help of two tests. The first one is the well known intelligibility diagnostic rhyme test (DRT) and the second one is the mean opinion score (MOS). The system considered appears to be rather robust i.e., demonstrates high noise and fading immunity and provides good speech quality for the bit-rate 4.8 kb/s in channels with the bit-error rate not exceeding 10^-2

Keywords

Rayleigh channels; channel capacity; error correction; error statistics; linear predictive coding; speech codecs; voice communication; 4.8 kbit/s; CELP speech codec; Rayleigh fading; bit-error rate; channel errors correction; code-excited linear voice prediction; intelligibility diagnostic rhyme test; low-bit rate speech transmission system; mean opinion score; performance; speech quality; speech restoration; AWGN; Additive white noise; Computational modeling; Fading; Gaussian noise; Noise robustness; Rayleigh channels; Signal processing; Speech codecs; Vocoders;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Electronics Engineers in Israel, 1996., Nineteenth Convention of

Conference_Location

Jerusalem

Print_ISBN

0-7803-3330-6

Type

conf

DOI

10.1109/EEIS.1996.566889

Filename

566889