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Analysis-By-Synthesis Based Switched Transform Domain Split Vq Using Gaussian Mixture Model

Chatterjee, Saikat and Sreenivas, TV (2009) Analysis-By-Synthesis Based Switched Transform Domain Split Vq Using Gaussian Mixture Model. In: Proceedings of the 2009 IEEE International Conference on Acoustics, Speech and Signal Processing, APR 19-24, 2009, Taipei, Taiwan, pp. 4117-4120.

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Abstract

Using analysis-by-synthesis (AbS) approach, we develop a soft decision based switched vector quantization (VQ) method for high quality and low complexity coding of wideband speech line spectral frequency (LSF) parameters. For each switching region, a low complexity transform domain split VQ (TrSVQ) is designed. The overall rate-distortion (R/D) performance optimality of new switched quantizer is addressed in the Gaussian mixture model (GMM) based parametric framework. In the AbS approach, the reduction of quantization complexity is achieved through the use of nearest neighbor (NN) TrSVQs and splitting the transform domain vector into higher number of subvectors. Compared to the current LSF quantization methods, the new method is shown to provide competitive or better trade-off between R/D performance and complexity.

Item Type: Conference Paper
Additional Information: Copyright 2009 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: VQ;LSF quantization;GMM.
Department/Centre: Division of Electrical Sciences > Electrical Communication Engineering
Date Deposited: 08 Sep 2009 09:30
Last Modified: 19 Sep 2010 05:44
URI: http://eprints.iisc.ernet.in/id/eprint/22956

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