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A linear filter for time scaling of speech

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2 Author(s)
Asi, M.K. ; Dept. of Electr. & Comput. Eng., Wisconsin-Madison Univ., WI, USA ; Saleh, B.E.A.

The authors present a new method for time scaling of speech signals based on scaling the short-time Fourier transform (STFT) along the time axis while keeping it unchanged along the frequency axis. Because the resultant time-frequency function is not an admissible STFT, they project it on the space of admissible STFTs, i.e., they find a signal whose STFT best approximates the time-frequency function. The time-scaled signal is related to the original signal by a linear periodically-time-varying filter, which is simple to implement. High quality time-scaled words and sentences have been obtained using this method

Published in:

Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on

Date of Conference:

11-14 Apr 1988