Search Results for author: Niko Brummer

Found 8 papers, 2 papers with code

A Speaker Verification Backend with Robust Performance across Conditions

1 code implementation2 Feb 2021 Luciana Ferrer, Mitchell McLaren, Niko Brummer

When trained on a number of diverse datasets that are labeled only with respect to speaker, the proposed backend consistently and, in some cases, dramatically improves calibration, compared to the standard PLDA approach, on a number of held-out datasets, some of which are markedly different from the training data.

Speaker Verification

Large-Scale Speaker Diarization of Radio Broadcast Archives

no code implementations19 Jun 2019 Emre Yilmaz, Adem Derinel, Zhou Kun, Henk van den Heuvel, Niko Brummer, Haizhou Li, David A. van Leeuwen

This paper describes our initial efforts to build a large-scale speaker diarization (SD) and identification system on a recently digitized radio broadcast archive from the Netherlands which has more than 6500 audio tapes with 3000 hours of Frisian-Dutch speech recorded between 1950-2016.

speaker-diarization Speaker Diarization +1

Fast variational Bayes for heavy-tailed PLDA applied to i-vectors and x-vectors

1 code implementation24 Mar 2018 Anna Silnova, Niko Brummer, Daniel Garcia-Romero, David Snyder, Lukas Burget

We have recently introduced a fast scoring algorithm for a discriminatively trained HT-PLDA backend.

Gaussian meta-embeddings for efficient scoring of a heavy-tailed PLDA model

no code implementations27 Feb 2018 Niko Brummer, Anna Silnova, Lukas Burget, Themos Stafylakis

Embeddings in machine learning are low-dimensional representations of complex input patterns, with the property that simple geometric operations like Euclidean distances and dot products can be used for classification and comparison tasks.

Speaker Recognition

A Generative Model for Score Normalization in Speaker Recognition

no code implementations28 Sep 2017 Albert Swart, Niko Brummer

We propose a theoretical framework for thinking about score normalization, which confirms that normalization is not needed under (admittedly fragile) ideal conditions.

Speaker Recognition

Generative, Fully Bayesian, Gaussian, Openset Pattern Classifier

no code implementations23 Jul 2013 Niko Brummer

This report works out the details of a closed-form, fully Bayesian, multiclass, openset, generative pattern classifier using multivariate Gaussian likelihoods, with conjugate priors.

The PAV algorithm optimizes binary proper scoring rules

no code implementations8 Apr 2013 Niko Brummer, Johan du Preez

There has been much recent interest in application of the pool-adjacent-violators (PAV) algorithm for the purpose of calibrating the probabilistic outputs of automatic pattern recognition and machine learning algorithms.

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