Title :
Speech Analysis and Synthesis Based on Dynamic Modes
Author :
Vargas, J. ; McLaughlin, Steve
Author_Institution :
Escuela de Ing. Electr., Univ. de Los Andes, Merida, Venezuela
Abstract :
In this paper, the source-filter model of speech production is adapted to represent the speech signal as the superposition and convolution of a dynamic source and resonant modes. The aim is to increase the resolution of the time-instantaneous-frequency representation of each of the individual contributions of different sections of the human phonatory system. We present a framework based on dynamic mode predictors and filters, which are adapted, using gradient-based techniques, to track the modal dynamics of speech yielding a representation which is free from quasi-stationary assumptions thus allowing flexible manipulation of the speech signal. Several examples are offered including intonation modifications to illustrate the potential of the proposed approach.
Keywords :
filtering theory; gradient methods; prediction theory; signal representation; speech processing; speech synthesis; dynamic mode filters; dynamic mode predictors; gradient-based techniques; human phonatory system; quasi-stationary assumptions; source filter model; speech production; speech signal processing; speech synthesis; time instantaneous-frequency representation; Modal analysis; Speech analysis; Speech processing; Speech synthesis; Dynamic features; instantaneous frequency; instantaneous pitch tracking; intonation modification; modal dynamics; nonstationary models; speech resonances;
Journal_Title :
Audio, Speech, and Language Processing, IEEE Transactions on
DOI :
10.1109/TASL.2011.2151859
