Title :
PACELP: a high quality and low complexity scheme for narrow band coding of speech
Author :
Liu, Z. Yonq ; Zhanq, F. Chanq
Author_Institution :
Dept. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., China
Abstract :
The paper proposes a new Pulse Adaptive Code-Excited Linear Predictive (PACELP) speech coding algorithm. The optimal excitation search procedures become simple when the pulse adaptive method is used in matching the codebook. The codebook of PACELP is obtained from Regular-Pulse Excitation sequences using a varying threshold clustering algorithm. The codebook efficiency is 4 times as much as the basic CELP codebook, and its dimensions are reduced from 40 to 10. Finally computer simulation results show that at 4.8 kb/s, PACELP can produce a clear and natural-sounding synthetic speech
Keywords :
adaptive filters; data compression; encoding; speech analysis and processing; speech synthesis; 4.8 kbit/s; PACELP codebook; codebook efficiency; computer simulation; low computational complexity; narrow band coding; natural-sounding synthetic speech; optimal excitation search procedures; pulse adaptive code excited linear predictive algorithm; regular pulse excitation sequences; speech coding algorithm; varying threshold clustering algorithm; vector quantization; Autocorrelation; Decoding; Delay; Equations; Linear predictive coding; Mobile computing; Narrowband; Nonlinear filters; Speech coding; Speech synthesis;
Conference_Titel :
Circuits and Systems, 1991. Conference Proceedings, China., 1991 International Conference on
Conference_Location :
Shenzhen
DOI :
10.1109/CICCAS.1991.184272
