Title :
Performance of error protected binary pulse excitation coders at 11.4 kb/s over mobile radio channels
Author :
Salami, R.A. ; Wong, K.H.H. ; Steele, R. ; Appleby, D.G.
Author_Institution :
Dept. of Electron. & Comput. Sci., Southampton Univ., UK
Abstract :
The performance of error protected transformed binary pulse excited (TBPE) coders over Rayleigh fading channels is investigated. The TBPE coder is a stochastically excited linear predictive coding (LPC) coder which produces near-toll quality speech in the vicinity of 8 kb/s utilizing an extremely simple excitation search procedure. A TBPE coder operating at 7.4 kb/s is used, and two methods of embedding channel coding into the speech coder are studied, aiming at the overall bit rate of 11.4 kb/s specified for the half-rate GSM coder. A method of embedding Reed-Solomon codes into speech coding is presented, and it is compared with rate-compatible punctured convolutional (RCPC) codes. Results show the superiority of the proposed scheme over RCPC codes in both performance and implementation simplicity
Keywords :
cellular radio; digital radio systems; encoding; error correction codes; filtering and prediction theory; speech analysis and processing; vocoders; 11.4 kbit/s; 7.4 kbit/s; Rayleigh fading channels; Reed-Solomon codes; TBPE coder; channel coding; error protected binary pulse excitation coders; excitation search; half-rate GSM coder; mobile radio channels; near-toll quality speech; rate compatible punctured convolutional codes; speech coder; Bit rate; Channel coding; Computer errors; Convolutional codes; Fading; GSM; Land mobile radio; Linear predictive coding; Protection; Reed-Solomon codes; Signal synthesis; Speech coding; Speech synthesis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1990. ICASSP-90., 1990 International Conference on
Conference_Location :
Albuquerque, NM
DOI :
10.1109/ICASSP.1990.115752
