Reduced bit-rate representation of speech using mixed Fourier-Walsh transforms

Wasfy B. Mikhael, Andreas Spanias

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

2 Citations (Scopus)

Abstract

A mixed Fourier-Walsh signal representation is proposed for transform coding. Basis functions from two transforms are used, namely, the discrete Fourier transform (DFT) and the Walsh-Hadamard transform (WHT). An iterative algorithm is used to implement the mixed representation. A finite number of DFT components is used to represent the selective (narrowband) dominant spectrum of speech on a frame-by-frame basis. The whitened (broadband) residual signal is represented using a small number of Walsh components. The parameters of the mixed representation are coded directly by coding the DFT and WHT components. Results are given for frame-by-frame and packet coding at rates ranging from 16 to 9.6 kb/s.

Original languageEnglish (US)
Title of host publicationConference Record - Asilomar Conference on Circuits, Systems & Computers
EditorsRay R. Chen
PublisherPubl by Maple Press, Inc
Pages366-370
Number of pages5
Volume1
StatePublished - 1988
Externally publishedYes
Eventv 1 (of 2) - Pacific Grove, CA, USA
Duration: Oct 31 1988Nov 2 1988

Other

Otherv 1 (of 2)
CityPacific Grove, CA, USA
Period10/31/8811/2/88

Fingerprint

Walsh transforms
Discrete Fourier transforms
Hadamard transforms
Fourier transforms

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Mikhael, W. B., & Spanias, A. (1988). Reduced bit-rate representation of speech using mixed Fourier-Walsh transforms. In R. R. Chen (Ed.), Conference Record - Asilomar Conference on Circuits, Systems & Computers (Vol. 1, pp. 366-370). Publ by Maple Press, Inc.

Reduced bit-rate representation of speech using mixed Fourier-Walsh transforms. / Mikhael, Wasfy B.; Spanias, Andreas.

Conference Record - Asilomar Conference on Circuits, Systems & Computers. ed. / Ray R. Chen. Vol. 1 Publ by Maple Press, Inc, 1988. p. 366-370.

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

Mikhael, WB & Spanias, A 1988, Reduced bit-rate representation of speech using mixed Fourier-Walsh transforms. in RR Chen (ed.), Conference Record - Asilomar Conference on Circuits, Systems & Computers. vol. 1, Publ by Maple Press, Inc, pp. 366-370, v 1 (of 2), Pacific Grove, CA, USA, 10/31/88.
Mikhael WB, Spanias A. Reduced bit-rate representation of speech using mixed Fourier-Walsh transforms. In Chen RR, editor, Conference Record - Asilomar Conference on Circuits, Systems & Computers. Vol. 1. Publ by Maple Press, Inc. 1988. p. 366-370
Mikhael, Wasfy B. ; Spanias, Andreas. / Reduced bit-rate representation of speech using mixed Fourier-Walsh transforms. Conference Record - Asilomar Conference on Circuits, Systems & Computers. editor / Ray R. Chen. Vol. 1 Publ by Maple Press, Inc, 1988. pp. 366-370
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