Combine multiple time-delay HMEs for speaker identification

2002 ◽  
Author(s):  
Ke Chen ◽  
Dahong Xie ◽  
Huisheng Chi
Keyword(s):  
Time Delay ◽  
Speaker Identification ◽  
Multiple Time

SPEAKER IDENTIFICATION USING TIME-DELAY HMEs

1996 ◽  
Vol 07 (01) ◽  
pp. 29-43 ◽  
Author(s):  
KE CHEN ◽  
DAHONG XIE ◽  
HUISHENG CHI
Keyword(s):  
Time Delay ◽  
Temporal Processing ◽  
Speaker Identification ◽  
Identification System ◽  
Multiple Time ◽  
Training Time ◽  
Fast Training ◽  
Substantial Problem ◽  
Spatio Temporal ◽  
Hierarchical Mixture Of Experts

In this paper, we extend the Hierarchical Mixture of Experts (HME) to temporal processing and explore it for a substantial problem, that of text-dependent speaker identification. For a specific multiway classification, we propose a generalized Bernoulli density instead of the multinomial logit density to avoid the instability during training. Time-delay technique is applied for spatio-temporal processing in the HME and a combining scheme is presented for combining multiple time-delay HMEs in order to complete a multi-scale analysis for the temporal data. Using the time-delay HME along with the EM algorithm as well as the combination of multiple time-delay HMEs, the speaker identification system has a good performance and yields significantly fast training. We have also addressed some issues about the time-delay techniques in the HME.

Parametric Resonance of a Self-Excited System Under External Force and Time Delay Influence

2013 ◽  
Author(s):  
Jerzy Warminski ◽  
Anna Warminska
Keyword(s):  
Time Delay ◽  
External Force ◽  
Parametric Resonance ◽  
Parametric Excitation ◽  
Multiple Time ◽  
Frequency Locking ◽  
Scale Method ◽  
Rayleigh Function ◽  
Excited System ◽  
Multiple Time Scale Method

Vibrations of a nonlinear self-excited system driven by parametric excitation are presented in the paper. The considered model with one DOF includes a self-excitation term represented by a nonlinear Rayleigh function and also a periodically varied stiffness coefficient which represents parametric excitation. The influence of the external force or/and time delay, treated as a control signal, is demonstrated. Nonlinear parametric resonance is determined numerically and analytically by the multiple time scale method. The influence of time delay on the resonance zones and the frequency locking phenomenon is analysed.

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