Arbitrary orthogonal tilings of the time-frequency plane

C. Herley, J. Kovacevic, K. Ramchandran, M. Vetterli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper we consider expansions which give arbitrary orthonormal tilings of the time-frequency plane. These differ from the short-time Fourier transform, wavelet transform, and wavelet packets tilings in that they change over time. We show how this can be achieved using time-varying orthogonal tree structures, which preserve orthogonality, even across transitions. One method is based on lapped orthogonal transforms, which makes it possible to change the number of channels in the transform. A second method is based on the construction of boundary filters, and gives arbitrary tilings. We present an algorithm which for a given signal decides on the best binary segmentation, and which tree split to use for each segment, and is optimal in a ratedistortion sense. We present the results of experiments on test signals.

Original languageEnglish (US)
Title of host publicationProceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages11-14
Number of pages4
ISBN (Electronic)0780308050, 9780780308053
DOIs
StatePublished - 1992
Event1992 IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis - Victoria, Canada
Duration: Oct 4 1992Oct 6 1992

Publication series

NameProceedings of the IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis

Conference

Conference1992 IEEE-SP International Symposium on Time-Frequency and Time-Scale Analysis
CountryCanada
CityVictoria
Period10/4/9210/6/92

ASJC Scopus subject areas

  • Signal Processing

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