Variable Dimension Trellis-Coded Quantization of Sinusoidal Parameters

Morten Holm Larsen, Mads G. Christensen, Søren Holdt Jensen

Research output: Contribution to journalJournal articleResearchpeer-review

7 Citations (Scopus)
263 Downloads (Pure)

Abstract

In this letter, we propose joint quantization of the parameters of a set of sinusoids based on the theory of trellis-coded quantization. A particular advantage of this approach is that it allows for joint quantization of a variable number of sinusoids, which is particularly relevant in variable rate parametric audio coding.
Under high-resolution assumptions and based on a perceptually relevant distortion measure, we derive analytical expressions for the optimal design subject to an entropy constraint. Numerical experiments show a significant performance gain compared to optimal spherical quantization at the cost of a slight increase in computational complexity.
Original languageEnglish
JournalIEEE Signal Processing Letters
Volume15
Pages (from-to)17-20
Number of pages4
ISSN1070-9908
Publication statusPublished - 2008

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