Direct coding of a class of non-stationary signals based on mixed transforms

Wasfy B. Mikhael, Andreas Spanias

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

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 kb/s to 9.6 kb/s.

Original languageEnglish (US)
Title of host publicationProceedings - IEEE International Symposium on Circuits and Systems
Editors Anon
PublisherPubl by IEEE
Pages280-283
Number of pages4
Volume1
StatePublished - 1989
Externally publishedYes
EventIEEE International Symposium on Circuits and Systems 1989, the 22nd ISCAS. Part 1 - Portland, OR, USA
Duration: May 8 1989May 11 1989

Other

OtherIEEE International Symposium on Circuits and Systems 1989, the 22nd ISCAS. Part 1
CityPortland, OR, USA
Period5/8/895/11/89

Fingerprint

Walsh transforms
Hadamard transforms
Discrete Fourier transforms

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

Cite this

Mikhael, W. B., & Spanias, A. (1989). Direct coding of a class of non-stationary signals based on mixed transforms. In Anon (Ed.), Proceedings - IEEE International Symposium on Circuits and Systems (Vol. 1, pp. 280-283). Publ by IEEE.

Direct coding of a class of non-stationary signals based on mixed transforms. / Mikhael, Wasfy B.; Spanias, Andreas.

Proceedings - IEEE International Symposium on Circuits and Systems. ed. / Anon. Vol. 1 Publ by IEEE, 1989. p. 280-283.

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

Mikhael, WB & Spanias, A 1989, Direct coding of a class of non-stationary signals based on mixed transforms. in Anon (ed.), Proceedings - IEEE International Symposium on Circuits and Systems. vol. 1, Publ by IEEE, pp. 280-283, IEEE International Symposium on Circuits and Systems 1989, the 22nd ISCAS. Part 1, Portland, OR, USA, 5/8/89.
Mikhael WB, Spanias A. Direct coding of a class of non-stationary signals based on mixed transforms. In Anon, editor, Proceedings - IEEE International Symposium on Circuits and Systems. Vol. 1. Publ by IEEE. 1989. p. 280-283
Mikhael, Wasfy B. ; Spanias, Andreas. / Direct coding of a class of non-stationary signals based on mixed transforms. Proceedings - IEEE International Symposium on Circuits and Systems. editor / Anon. Vol. 1 Publ by IEEE, 1989. pp. 280-283
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