Title

Reduced Bit-Rate Representation Of Speech Using Mixed Fourier-Walsh Transforms

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.

Publication Date

12-1-1988

Publication Title

Conference Record - Asilomar Conference on Circuits, Systems & Computers

Volume

1

Number of Pages

366-370

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

0024182637 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0024182637

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