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Designing a Quantizer of LPC Parameters for the Narrowband Speech Coder using Block-Constrained Trellis Coded Quantization  

Jun, Ja-Kyoung (한양대학교 전자전기제어계측공학과)
Park, Sang-Kuk (한양대학교 전자전기제어계측공학과)
Kang, Sang-Won (한양대학교 전자전기제어계측공학과)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.3C, 2007 , pp. 234-240 More about this Journal
Abstract
In this paper, low complexity block constrained trellis coded quantization (BC-TCQ) structures are introduced, and a predictive BC TCQ encoding method is developed for quantization of line spectrum frequencies (LSF) parameters for narrowband speech coding applications. Trellis-coded quantization(TCQ) is a form of VQ that builds the VQ codebook from interleaved constituent scalar quantization codebooks. The performance is compared to the other VQ, demonstrating reduction in spectral distortion and significant reduction in encoding complexity. The predictive BC-TCQ is about 0.47107 dB superior to the IS-641 split-VQ, 26bits/frame, in spectral distortion sense. The BC-TCQ is 64.54%, 76.93%, 2.35% of the IS-641 split-VQ, respectively, in the complexity of the additions, multiplies, comparisons.
Keywords
BC-TCQ;
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