Accurate representation of time-varying signals using mixed transforms with applications to speech.

Wasfy B. Mikhael, Andreas Spanias

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

Basis functions from two transforms, the discrete Fourier transform (DFT) and the Walsh-Hadamard transform are used. An iterative algorithm to implement the mixed representation is developed. A finite number of DFT components, either fixed or variable, is used to represent the selective (narrowband) dominant spectrum of the signal on a frame-by-frame basis. The whitened (broadband) residual signal is represented using a small number of Walsh components. The mixed partial sets are applied to speech representation. Preliminary results and informal listenings using this model produced good quality speech.

Original languageEnglish (US)
Pages (from-to)329-331
Number of pages3
JournalIEEE Transactions on Circuits and Systems
Volume36
Issue number2
DOIs
StatePublished - Feb 1989
Externally publishedYes

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Discrete Fourier transforms
Walsh transforms
Hadamard transforms

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Accurate representation of time-varying signals using mixed transforms with applications to speech. / Mikhael, Wasfy B.; Spanias, Andreas.

In: IEEE Transactions on Circuits and Systems, Vol. 36, No. 2, 02.1989, p. 329-331.

Research output: Contribution to journalArticle

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