A new frequency domain approach to time-scale expansion of audio signals

Author

Ferreira, Aníbal J S

Author_Institution

Fac. de Engenharia, Porto Univ., Portugal

Volume

6

fYear

1998

fDate

12-15 May 1998

Firstpage

3577

Abstract

We present a new algorithm for time-scale expansion of audio signals that comprises: time interpolation, frequency-scale expansion and modification of a spectral representation of the signal. The algorithm relies on an accurate model of signal analysis and synthesis, and was constrained to a non-iterative modification of the magnitudes and the wrapped phases of the relevant sinusoidal components of the signal. The structure of the algorithm is described and its performance is illustrated. A few examples of time-expanded wideband speech can be found on the Internet

Keywords

audio signals; discrete Fourier transforms; frequency-domain analysis; interpolation; signal representation; signal synthesis; spectral analysis; speech processing; Internet; algorithm; audio signals; frequency domain approach; frequency-scale expansion; frequency-scale modification; magnitudes; odd-DFT based system; performance; signal analysis; signal representation; signal synthesis; sinusoidal components; spectral representation; time interpolation; time-expanded wideband speech; time-scale expansion; wrapped phases; Fading; Filter bank; Frequency domain analysis; Frequency estimation; Frequency synthesizers; Interpolation; Signal analysis; Signal synthesis; Speech synthesis; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 1998. Proceedings of the 1998 IEEE International Conference on

Conference_Location

Seattle, WA

ISSN

1520-6149

Print_ISBN

0-7803-4428-6

Type

conf

DOI

10.1109/ICASSP.1998.679649

Filename

679649