Speaker: B.Yegnanarayana, Professor, Dept. Computer Science and
Engineering, IIT Madras, India
Email: yegna@ece.cmu.edu

Abstract: In this talk I propose to discuss a method for manipulating the
duration and pitch without significantly distorting the qaulity of speech.
This is accomplished using the knowledge of epochs, which are the instants
of significant excitation of the vocal tract system. The method to
extract the epochs from speech is based on the properties of the
group-delay fuctions. Naturaless is preserved since significant portion of
the excitation information is retained in the form of Linear Prediction
(LP) residual. The technique will be illustrated with a few audio
demonstrations.