Title :
A robust 2400 bit/s MBE-LPC speech coder incorporating joint source and channel coding
Author :
Rowe, D. ; Secker, P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Wollongong Univ., NSW, Australia
Abstract :
A robust speech coder based on the multiband excitation (MBE) model is presented. Unlike many MBE coders, the spectral envelope information is represented using linear predictive coefficients (LPCs), which are quantized and encoded using a joint source and channel trellis coding scheme to obtain remarkable robustness to random channel errors without increase in bit rate (i.e., no redundant forward error correction (FEC) required). The coder produces communications quality speech at 2400 b/s and can maintain acceptable speech quality at bit error rates (BERs) up to 5%. The complexity is low enough for implementation on commercial DSP devices
Keywords :
linear predictive coding; spectral analysis; speech coding; telecommunication channels; vocoders; 2400 bit/s; BER; MBE-LPC speech coding; bit error rates; bit rate; channel coding; commercial DSP devices; communications quality speech; linear predictive coefficients; multiband excitation; random channel errors; source coding; spectral envelope information; speech quality; trellis coding; Bit rate; Channel coding; Forward error correction; Frequency; Linear predictive coding; Predictive models; Radio spectrum management; Robustness; Speech coding; Speech synthesis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1992. ICASSP-92., 1992 IEEE International Conference on
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-0532-9
DOI :
10.1109/ICASSP.1992.226100
