By Topic

A fast algorithm for computing the vocal-tract impulse response from the transfer function

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Qiguang Lin ; Centre for Comput. Aids for Ind. Productivity, Rutgers Univ., Piscataway, NJ, USA

This paper describes a fast algorithm that computes the impulse response of the vocal tract from its transfer function. First, numerical methods for computing the transfer function of a given vocal-tract configuration are briefly outlined. These methods include techniques (1) to decompose the numerator and denominator of the transfer function and (2) to efficiently determine the resonance modes of the vocal tract. Next, is a description of how to calculate residues at the poles and how to express the vocal-tract transfer function as a partial fraction expansion series. Each term in the expansion corresponds to an elementary formant generator, and the additive terms correspond to a parallel formant architecture. A second-order digital filter is derived for each formant generator. The impulse response of the vocal tract can therefore be specified compactly by a set of such filters. Good agreement is observed between the directly calculated transfer function and the one synthesized by the proposed algorithm. The algorithm is being used in the articulatory speech synthesizer under development both at Rutgers University and at the Royal Institute of Technology, Sweden. An ambitious goal is to incorporate the method into a text-to-speech synthesizer and/or an adaptive voice mimic system

Published in:

Speech and Audio Processing, IEEE Transactions on  (Volume:3 ,  Issue: 6 )