Speaker: Sara Barahona Quirós. Abstract: Sound event detection is the task that aims to automatize the human’s ability of recognizing sound events in the environment by their particular acoustic information. For this purpose, deep learning techniques are employed to build… Read More
A Speaker Verification Backend with Robust Performance across Conditions
Speaker: Joaquin Gonzalez-Rodriguez. Abstract: Presentation of the paper in https://arxiv.org/abs/2102.01760: L. Ferrer et al. “A Speaker Verification Backend with Robust Performance across Conditions”, 2021. Abstract of the paper (reproduced from the preprint): In this paper, we address the problem of… Read More
Linear-Gaussian Bayesian Network Applications to Forensic Chemistry
Speaker: Elías Hernandis Prieto. Abstract: Forensic evidence evaluation using the likelihood ratio framework requires knowledge about the probability distribution of the data. For evaluating samples of glass remains, this translates to obtaining the joint probability distribution of the relative concentrations… Read More
Improvements in deep learning semi-supervised model selection for the optimization of different Sound Event Detection metrics
Spaker: Cristina Moratilla. Abstract: Sound Event Detection is one of the most developed fields in the area of audio signal processing in the last decades. The objective of such detection is to locate the start and end instants of audio… Read More
Bias analysis in speaker recognition systems based in DNN-embeddings
Speaker: Almudena Aguilera. Abstract: In this study we will evaluate the discriminatory behaviours that are generated in speaker recognition systems, specifically those that verify whether two audios belong to the same speaker or not. These systems work by extracting the… Read More
MetaAudio: A Few-Shot Audio Classification Benchmark
Speaker: David Martín Gutiérrez. Abstract: Currently available benchmarks for few-shot learning (machine learning with few training examples) are limited in the domains they cover, primarily focusing on image classification. This work aims to alleviate this reliance on image-based benchmarks by… Read More
Speaker Diarization, X-vectors with Encoder-Decoder based attractors
Speaker: Juan Ignacio Álvarez Trejos. Abstract: X-Vectors are speaker embeddings that emerge to address the speaker recognition task, surprisingly outperforming i-vectors in most speaker tasks. It is proposed to take advantage of the information contained in these embeddings by using… Read More
Gaussianization of LA-ICP-MS Features to Improve Calibration in Forensic Glass Comparison
Speaker: Pablo Ramírez Hereza. Abstract: The forensic comparison of glass task aims to compare a glass sample of unknown source with a control glass sample of known source. In this work, we use multielemental features from laser ablation inductively coupled… Read More
Article review: “Objectifying evidence evaluation for gunshot residue comparisons using machine learning on criminal case data”
Speaker: Daniel Ramos Castro Abstract: Basado en https://doi.org/10.1016/j.forsciint.2022.111293. “Comparative gunshot residue analysis addresses relevant forensic questions such as ‘did suspect X fire shot Y?’. More formally, it weighs the evidence for hypotheses of the form H1: gunshot residue particles found… Read More
Assessing Calibration in the regression setting
Speaker: Sergio Álvarez Balanya. Abstract: Calibration is a desirable property of pattern recognition systems, especially when their predictions are going to be used to make decisions. In our group, we are used to dealing with calibration in classification tasks such… Read More