Empirical Lower Bound on the Bitrate for the Transparent Memoryless Coding of Wideband LPC Parameters

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Title Empirical Lower Bound on the Bitrate for the Transparent Memoryless Coding of Wideband LPC Parameters
Author So, Stephen; Paliwal, Kuldip Kumar
Journal Name IEEE Signal Processing Letters
Editor Alex B. Gershman
Year Published 2006
Place of publication Piscataway, NJ, USA
Publisher IEEE
Abstract In this letter, we determine empirical lower bounds on the bitrate required to transparently code linear predictive coding (LPC) parameters derived from wideband speech. This is achieved via extrapolation of the operating distortion-rate curve of an unconstrained vector quantizer that is trained using artificial vectors generated by a Gaussian mixture model. Memoryless coding is considered and two competing LPC parameter representations are investigated. Our results show a lower bound of 31 bits/frame when assuming high-rate linearity in the operating distortion-rate curve and 35 bits/frame for an exponential curve.We also evaluate a recent quantization scheme and compare its performance against this lower bound.
Peer Reviewed Yes
Published Yes
Publisher URI http://www.signalprocessingsociety.org/
Alternative URI http://dx.doi.org/10.1109/LSP.2006.874444
Copyright Statement Copyright 2006 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.
Volume 13
Issue Number 9
Page from 569
Page to 572
ISSN 1070-9908
Date Accessioned 2007-02-13
Language en_AU
Research Centre Institute for Integrated and Intelligent Systems
Faculty Faculty of Science, Environment, Engineering and Technology
Subject PRE2009-Signal Processing
URI http://hdl.handle.net/10072/12327
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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