Computational Auditory Scene Analysis (CASA) aims to model our ability to structure our acoustical environment. In a CASA context, this paper deals with a method for time-frequency labeling based on harmonic properties. The method is based on a classical pitch extraction algorithm, termed the « zerocrossing method », which is known to be particularly sensitive to any kind of interference. This ...

On this paper we present a new approach for the localisation of superposed speech areas. The system is based on the frequency tracking of speech segments following the evolution of the main amplitude frequencies and uses no learning of acoustic or prosodic models. The set of trackings of the frequencies are then grouped together using a distance based on the harmonicity, each group being the pr...

A mesh generation technique on a closed surface composed of a few parametric surfaces is provided. The edge size function is a fundamental entity in order to be able to apply the process of generalized Delaunay triangulation with respect to the first fundamental form. Unfortunately, the edge size function is not known a-priori in general. We describe an approach which invokes the Laplace-Beltra...

1. Abstract 2. Introduction 3. Grouping of musical sounds 3.1. Perceptual fusion and separation of spectral components 3.1.1. Harmonicity 3.1.2. Onset and time-varying synchronicity 3.2. Auditory continuity effects 3.3. Grouping of rapid sequences of tones 3.3.1. Grouping by pitch proximity 3.3.2. Grouping by timbre 3.3.3. Grouping by temporal proximity 4. Grouping of tone sequences from differ...

We establish the equivalence of the analytic and probabilistic notions of subharmonicity in the framework of general symmetric Hunt processes on locally compact separable metric spaces, extending an earlier work of the first named author on the equivalence of the analytic and probabilistic notions of harmonicity. As a corollary, we prove a strong maximum principle for locally bounded finely con...

This research article attempts to investigate anti-invariant Lorentzian submersions and the Lagrangian (LLS) from concircular structure [in short (LCS) n ] manifolds onto semi-Riemannian with relevant non-trivial examples. It is shown that horizontal distributions of such are not integrable their fibers totally geodesic. As a result, they can be geodesic maps. Anti-invariant also explored for h...

We present a system for source separation from monaural musical mixtures based on sinusoidal modeling and on a library of timbre models trained a priori. The models, which rely on Principal Component Analysis, serve as time-frequency probabilistic templates of the spectral envelope. They are used to match groups of sinusoidal tracks and assign them to a source, as well as to reconstruct overlap...

Polyphonic pitch transcription consists of estimating the onset time, duration and pitch of each note within a music signal. Adaptive signal models such as Nonnegative Matrix Factorization (NMF) appear well suited to this task, since they can provide a meaningful representation whatever instruments are playing. In this paper, we propose a simple transcription method using minimum residual loudn...