Title :
Multipulse-based codebooks for CELP coding at 7 kbps
Author :
Woo, Hong C. ; Gibson, Jerry D.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
A report is presented on the design of CELP codebooks matched in some ways to multipulse sequences that produce toll-quality speech. The authors designed a multipulse LPC system that achieves toll quality at 15 kb/s. They then studied the properties, especially the statistical properties, of these successful multipulse excitations for a variety of speakers and speech segments. CELP codebooks were developed which match the properties of the multipulse sequences to yield a final CELP coder for operation at 7 kb/s
Keywords :
encoding; filtering and prediction theory; speech analysis and processing; 7 kbit/s; CELP coding; LPC system; code excited linear prediction; multipulse excitations; multipulse sequences; multipulse-based codebooks; toll-quality speech; Autocorrelation; Bit rate; Convolutional codes; Degradation; Histograms; Linear predictive coding; Pulse amplifiers; Reed-Solomon codes; Speech coding; Speech synthesis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266382
