This paper describes the design of two-stage vector quantizar (VQ) forcoding Line Spectral Frequency (LSF) parameters for speech communication. The proposed VQ possesses low search complexity as compared with single stage vector quantization, using exhaustive search technique while maintaining nearly same quality. This proposed two-stage VQ technique quantizes LSF parameters at 10 bits/frame with e frama size of 10 ms. lntre frame ordering properties and features that LSF ere bounded within . a given range are exploited in codebook design. A pre-salection codebook designed from the second stage codebooks is used as first staga codabook in order to reduce the seerch complaxity. Moreover, this reduction in search complexity reducas the search delay as well as tha computational complexity of the search. Codebook search is besad on the maximum matching of input LSF vector and the codebook vector using minimum mean square error (MMSE) as the distance criterion. This paper describes the two stage codebook design, and codebook search techniques. The performance of the proposed VQ has been tested and results are reported in this paper.
References not available.
Cite this article:
Khan, Yadav and Parinita (2007). Design And Lmplamentation Of Two Stage (10-Bit) Vector Quantization Of Lsf Parameters Of Spaech. Journal of Ravishankar University (Part-B: Science), 20(1), pp.19-24.