Codebook-Excited Linear Prediction(CELP)techniques are often used
where the stochastic codebook structure and its searching algorithms will directly affect the synthesized speech quality and real-time realization of speech coding systems.The paper proposes a new method for lower bit-rate speech coding-Wavelet-Excited Linear Predictive coding(WELP)
where it uses three wavelet codebooks instead of the stochastic codebook.WELP highly increases the computational speed and reduces the complexity. With the same quality of synthesized speech for 6. 6kb/s speech coder
WELP can increase the coding speed twice than that of CELP.