In many speech signal processing applications, voice activity detection (VAD) plays an essential role for separating an audio stream into time intervals that contain speech activity and time intervals where speech is absent. Many features that reflect the presence of speech were introduced in literature. However, to our knowledge, no extensive comparison has been provided yet. In this article, ...

A speech signal captured by a distant microphone is generally smeared by reverberation, that severely degrades both the speech intelligibility and Automatic Speech Recognition (ASR) performance. Previously, we proposed a novel dereverberation method, named “Harmonicity based dEReverBeration (HERB)”, which estimates the inverse filter of an unknown impulse response by utilizing the inherent spee...

We shall describe a mesh generation technique on a composite trimmed Riemannian surface. The edge size function is a fundamental entity in order to be able to apply the process of generalized Delaunay triangulation with respect to a Riemannian metric. Unfortunately, the edge size function is not known a-priori in general. We describe an approach which invokes the Laplace-Beltrami operator to de...

A speech signal captured by a distant microphone is generally smeared by reverberation, that severely degrades both the speech intelligibility and Automatic Speech Recognition (ASR) performance. Previously, we proposed a novel dereverberation method, named “Harmonicity based dEReverBeration (HERB)”, which estimates the inverse filter of an unknown impulse response by utilizing the inherent spee...

This paper proposes a robust and accurate F0 estimation method for noisy speech. This method uses two different principles: (1) an F0 estimation based on periodicity and harmonicity of instantaneous amplitude for a robust estimation in noisy environments, and (2) an F0 estimation based on stability of instantaneous frequency as an accurate estimation method. The proposed method also uses a comb...

A. Both bi-harmonic map and f -harmonic map have nice physical motivation and applications. In this paper, by combination of these two harmonic maps, we introduce and study f -bi-harmonic maps as the critical points of the f -bi-energy functional 1 2 ∫ M f |τ(φ)| dvg. This class of maps generalizes both concepts of harmonic maps and biharmonic maps. We first derive the f -biharmonic map ...

Numerous difficulties, in the examination of emotions occurring in continuous spontaneous speech, are discussed in this paper, than different emotion recognition experiments are presented, using clauses as the recognition unit. In a testing experiment it was examined that what kind of acoustical features are the most important for the characterization of emotions, using spontaneous speech datab...

We study charge and energy transfer in two-site molecular electronic junctions in which electron transport is assisted by a vibrational mode. To understand the role of mode harmonicity/anharmonicity in transport behavior, we consider two limiting situations: (i) the mode is assumed harmonic, (ii) we truncate the mode spectrum to include only two levels, to represent an anharmonic mode. Based on...

Information transfer between triangle meshes is of great importance in computer graphics and geometry processing. To facilitate this process, a smooth and accurate map is typically required between the two meshes. While such maps can sometimes be computed between nearly-isometric meshes, the more general case of meshes with diverse geometries remains challenging. We propose a novel approach for...