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.
Journal of Ravishankar
University Vol. 20 No. B (Science) 2007 PP 19-24 ISSN 0970-5910
Design And Lmplamentation Of Two Stage (10-Bit) Vector
Quantization
Of Lsf Parameters Of Spaech
M.R.Khan, Horilal Yadav and V. Parinita
Electronics and Telecommunication, NIT,
Raipur
mrkhan63@gmail.com
MS Received: 23/08/06 Revised: 19.02.2007 Accepted: 24/04/2007.
Abstract - 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.
Keywords: Speech
Compression, LP, LSF, Vector Quantization.
NOTE: Full version of this manuscript is available in PDF.