Amelia Ciobanu

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In the context of the quasi-harmonic plus noise model (QHNM), the maximum voiced frequency performs the actual (spectral) separation between the deterministic and stochastic part of a speech signal. The paper presents two different new approaches for determining the maximum voiced frequency (MVF) for QHNM speech signal analysis. Both subjective and(More)
This paper presents an implemented interface for Romanian language of expressive 3D talking agents, also known as 3D avatars. The major contribution of this work regards adding synchronized 3D lips animation sequences to any given Romanian TTS-generated synthetic word/text. The synchronization is performed using a syllable by syllable approach. The(More)
Based on the widely spread concept of instantaneous frequency (IF), we resumed the IF attractors (IFAs) method used for tonal components extraction from any given signal and we emphasized its essential advantages over traditional approaches by incorporating it into a popular application: the calculus of auditory masking threshold (AMT). Using MPEG1 Layer 1(More)
In this paper we present a number of operations involving the manipulation of acoustic units necessary for creating a Romanian speech synthesis database. We propose a recording technique based on the newly introduced concept of the checkup word, we develop an acoustic unit extraction algorithm and we advance a set of identification markers. Also we propose(More)
In this paper an improved version of the instantaneous frequency attractors (IFAs) algorithm is presented, by introducing several solutions which reduce the number of spurious components especially for low signal to noise ratios (SNRs) and increase the accuracy of the frequency estimator. We perform multilevel comparison tests with both previous versions of(More)
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