A FAST AND SOFT VOICE ACTIVITY DETECTOR USING GARCH MODEL AND MARKOV MODEL CHAIN

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REZAEI SADEGH; TAHMASBI R.

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Journal Paper

Paper Information

Journal: AMIRKABIR Year:2007 | Volume:18 | Issue:66-D Page(s): 65-72

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Information Journal Paper

Title

A FAST AND SOFT VOICE ACTIVITY DETECTOR USING GARCH MODEL AND MARKOV MODEL CHAIN

Author(s)

REZAEI SADEGH | TAHMASBI R. | Issue Writer Certificate

Keywords

ESTIMATION THEORY

GARCH MODEL

HETEROSCEDASTICITY

MARKOV MODEL CHAIN

PROBABILITY DISTRIBUTION

VOICE ACTIVITY DETECTION

Abstract

This paper presents a robust algorithm for Voice Activity Detector (VAD) based on GARCH (Generalized Autoregressive Conditional HETEROSCEDASTICITY) Model, Variance Gamma Distribution (VGD) and binary Markov model.GARCH models are new statistical methods that are used especially in economic time series. There is a consensus that speech signals exhibit variances that change through time. GARCH MODELs are a popular choice to model these changing variances.Speech signal is assumed to have VGD because the VGD has heavier tails than the Gaussian Distribution (GD) and the distribution of noise signal is assumed to be Gaussian.In the proposed method, HETEROSCEDASTICITY will be modeled by GARCH and then the parameters of the distributions will be estimated recursively. Finally, using a binary Markov model and comparing it with an adaptive threshold, leads to the derivation of soft and hard detection. The simulation results show that the proposed VAD is able to operate down to -5 dB and in nonstationary environments.

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APA: Copy

REZAEI, SADEGH, & TAHMASBI, R.. (2007). A FAST AND SOFT VOICE ACTIVITY DETECTOR USING GARCH MODEL AND MARKOV MODEL CHAIN. AMIRKABIR, 18(66-D), 65-72. SID. https://sid.ir/paper/550043/en

Vancouver: Copy

REZAEI SADEGH, TAHMASBI R.. A FAST AND SOFT VOICE ACTIVITY DETECTOR USING GARCH MODEL AND MARKOV MODEL CHAIN. AMIRKABIR[Internet]. 2007;18(66-D):65-72. Available from: https://sid.ir/paper/550043/en

IEEE: Copy

SADEGH REZAEI, and R. TAHMASBI, “A FAST AND SOFT VOICE ACTIVITY DETECTOR USING GARCH MODEL AND MARKOV MODEL CHAIN,” AMIRKABIR, vol. 18, no. 66-D, pp. 65–72, 2007, [Online]. Available: https://sid.ir/paper/550043/en

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