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An Information Theoretic Approach to Speaker Diarization of Meeting Data
Related publications (51)
Subjective performance evaluation of bitrate allocation strategies for MPEG and JPEG Pleno point cloud compression
Touradj Ebrahimi, Michela Testolina, Davi Nachtigall Lazzarotto
The recent rise in interest in point clouds as an imaging modality has motivated standardization groups such as JPEG and MPEG to launch activities aiming at developing compression standards for point clouds. Lossy compression usually introduces visual arti ...
Springer2024Evaluation of the impact of lossy compression on event camera-based computer vision tasks
Touradj Ebrahimi, Davi Nachtigall Lazzarotto, Bowen Huang
In the field of image acquisition, Dynamic Vision Sensors (DVS) present an innovative methodology, capturing only the variations in pixel brightness instead of absolute values and thereby revealing unique features. Given that the primary deployment of DVS ...
2023Lower-bounds on the Bayesian Risk in Estimation Procedures via f–Divergences
Michael Christoph Gastpar, Adrien Vandenbroucque, Amedeo Roberto Esposito
We consider the problem of parameter estimation in a Bayesian setting and propose a general lower-bound that includes part of the family of f-Divergences. The results are then applied to specific settings of interest and compared to other notable results i ...
2022The Gray-Wyner Network and Wyner's Common Information for Gaussian Sources
Michael Christoph Gastpar, Erixhen Sula
This paper presents explicit solutions for two related non-convex information extremization problems due to Gray and Wyner in the Gaussian case. The first problem is the Gray-Wyner network subject to a sum-rate constraint on the two private links. Here, ou ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022From Generalisation Error to Transportation-cost Inequalities and Back
Michael Christoph Gastpar, Amedeo Roberto Esposito
In this work, we connect the problem of bounding the expected generalisation error with transportation-cost inequalities. Exposing the underlying pattern behind both approaches we are able to generalise them and go beyond Kullback- Leibler Divergences/Mutu ...
2022Generalization Error Bounds Via Rényi-, f-Divergences and Maximal Leakage
Michael Christoph Gastpar, Amedeo Roberto Esposito, Ibrahim Issa
In this work, the probability of an event under some joint distribution is bounded by measuring it with the product of the marginals instead (which is typically easier to analyze) together with a measure of the dependence between the two random variables. ...
2021Secrecy by Design With Applications to Privacy and Compression
Secrecy by design is examined as an approach to information-theoretic secrecy. The main idea behind this approach is to design an information processing system from the ground up to be perfectly secure with respect to an explicit secrecy constraint. The pr ...
2021Mutual Information Disentangles Interactions from Changing Environments
Daniel Maria Busiello, Giorgio Nicoletti
Real-world systems are characterized by complex interactions of their internal degrees of freedom, while living in ever-changing environments whose net effect is to act as additional couplings. Here, we introduce a paradigmatic interacting model in a switc ...
AMER PHYSICAL SOC2021Robust Generalization via f−Mutual Information
Michael Christoph Gastpar, Amedeo Roberto Esposito, Ibrahim Issa
Given two probability measures P and Q and an event E, we provide bounds on P(E) in terms of Q(E) and f-divergences. In particular, the bounds are instantiated when the measures considered are a joint distribution and the corresponding product of marginals ...
IEEE2020Robust Generalization via $\alpha$-Mutual Information
Michael Christoph Gastpar, Amedeo Roberto Esposito, Ibrahim Issa
The aim of this work is to provide bounds connecting two probability measures of the same event using Rényi -Divergences and Sibson’s -Mutual Information, a generalization of respectively the Kullback-Leibler Divergence and Shannon’s Mutual ...
ETHZ2020