Title :
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
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;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 1996., Nineteenth Convention of
Conference_Location :
Jerusalem
Print_ISBN :
0-7803-3330-6
DOI :
10.1109/EEIS.1996.566889
