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• W2964342009 abstract "The modeling of speech can be used for speech synthesis and speech recognition. We present a speech analysis method based on pole-zero modeling of speech with mixed block sparse and Gaussian excitation. By using a pole-zero model, instead of the all-pole model, a better spectral fitting can be expected. Moreover, motivated by the block sparse glottal flow excitation during voiced speech and the white noise excitation for unvoiced speech, we model the excitation sequence as a combination of block sparse signals and white noise. A variational EM (VEM) method is proposed for estimating the posterior PDFs of the block sparse residuals and point estimates of modelling parameters within a sparse Bayesian learning framework. Compared to conventional pole-zero and all-pole based methods, experimental results show that the proposed method has lower spectral distortion and good performance in reconstructing of the block sparse excitation." @default.
• W2964342009 created "2019-07-30" @default.
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• W2964342009 date "2017-08-01" @default.
• W2964342009 modified "2023-09-23" @default.
• W2964342009 title "A variational EM method for pole-zero modeling of speech with mixed block sparse and Gaussian excitation" @default.
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• W2964342009 doi "https://doi.org/10.23919/eusipco.2017.8081516" @default.
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