Speech Production and Enhancement
Prof. Yingyong Qi
Department of Speech and Hearing Sciences
University of Arizona
Tucson, AZ 85721-0071
Tuesday, November 2nd, 2:00 PM, ENS 302
yqi@u.arizona.edu
Abstract
I will talk about production-based speech enhancement and its applications
to wireless communication. Specifically, I will talk about the generation
of voice "fonts" for the cellular systems, and the extension of narrow band
(3.5 kHz) voice signals to broadband (8 kHz) digital signals. Voice "fonts"
refer to the transformation of speech signals for achieving certain desired
perceptual effect. It could be appealing to some users of cellular phone.
Broadband extension was attempted because cellular systems are digital and
are capable of processing wideband signals. Signal bandwidth was
limited mostly by the (analog) transmission channel. It is, however, highly
challenging to reconstruct wideband signal. Only low frequency extension
was accomplished. These topics represent some work I did at Qualcomm over
part of the summer.
Biography
Qi, Yingyong is an Associate Professor at the University of Arizona
in the Department of Speech and Hearing Sciences.
He has a courtesy appointment in Department of Electrical and Computer
Engineering.
He received his BS degree (1982) from the University of Science
and Technology of China, his MS degree (1985) from the Institute of
Acoustics, and his Ph.D. (1989) from Ohio State University.
He received a second Ph.D. in 1993 from the University of Arizona.
A list of Telecommunications and Signal Processing Seminars is available at
from the ECE department Web pages under "Seminars".
The Web address for the Telecommunications and Signal Processing Seminars is
http://anchovy.ece.utexas.edu/seminars