Title :
Implementation of modified regular-pulse excited linear predictive codec on TMS320C25
Author :
Liu, Z. Yong ; Zhang, L.P.
Author_Institution :
Dept. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., China
Abstract :
A modified regular-pulse-excited speech coding algorithm with long-term prediction (MRPE-LTP) is proposed. This scheme has a much smaller computational load than the standard algorithm adopted by CEPT Group Special Mobile without compromising the synthetic speech quality. This advantage is attributed to the novel way of determining the initial phase. A varying-threshold clustering vector quantization with a tree search method is given to quantize linear predictive coding (LPC) coefficients. Due to the optimal structure of the MRPE codec and the simple approach of determining the excitation parameters, implementation has been made possible on one TMS320C25 digital signal processor
Keywords :
codecs; data compression; digital signal processing chips; encoding; filtering and prediction theory; speech analysis and processing; LPC coefficients; TMS320C25 digital signal processor; excitation parameters; linear predictive codec; linear predictive coding; long-term prediction; modified regular-pulse-excited speech coding; synthetic speech quality; tree search method; varying-threshold clustering vector quantization; Clustering algorithms; Codecs; Digital signal processors; Linear predictive coding; Mobile computing; Prediction algorithms; Search methods; Signal processing algorithms; Speech coding; Vector quantization;
Conference_Titel :
Vehicular Technology Conference, 1991. Gateway to the Future Technology in Motion., 41st IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-87942-582-2
DOI :
10.1109/VETEC.1991.140494
