Florian Krebs

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Matthew E. P. Davies36
Ali Taylan Cemgil34
Gerhard Widmer31
Norberto Degara31
Simon J. Godsill30
28Gerhard Widmer
20Sebastian Böck
19Bertrand David
19Juan Pablo Bello
19Gaël Richard

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Evaluating the Online Capabilities of Onset Detection Methods
In this paper, we evaluate various onset detection algorithms in terms of their online capabilities. Most methods use some kind of normalization over time, which renders them unusable for online tasks. We modified existing methods to enable online application and evaluated their performance on a large dataset consisting of 27,774 annotated onsets. We focus… (More)
The k-Nearest Neighbour Join: Turbo Charging the KDD Process
The similarity join has become an important database primitive for supporting similarity searches and data mining. A similarity join combines two sets of complex objects such that the result contains all pairs of similar objects. Two types of the similarity join are well-known, the distance range join, in which the user defines a distance threshold for the… (More)
Epsilon Grid Order: An Algorithm for the Similarity Join on Massive High-Dimensional Data
The similarity join is an important database primitive which has been successfully applied to speed up applications such as similarity search, data analysis and data mining. The similarity join combines two point sets of a multidimensional vector space such that the result contains all point pairs where the distance does not exceed a parameter ε. In… (More)
Rhythmic Pattern Modeling for Beat and Downbeat Tracking in Musical Audio
Rhythmic patterns are an important structural element in music. This paper investigates the use of rhythmic pattern modeling to infer metrical structure in musical audio recordings. We present a Hidden Markov Model (HMM) based system that simultaneously extracts beats, downbeats, tempo, meter, and rhythmic patterns. Our model builds upon the basic structure… (More)
High Performance Data Mining Using the Nearest Neighbor Join
The similarity join has become an important database primitive to support similarity search and data mining. A similarity join combines two sets of complex objects such that the result contains all pairs of similar objects. Well-known are two types of the similarity join, the distance range join where the user defines a distance threshold for the join, and… (More)
Online Real-time Onset Detection with Recurrent Neural Networks
We present a new onset detection algorithm which operates online in real time without delay. Our method incorporates a recurrent neural network to model the sequence of onsets based solely on causal audio signal information. Comparative performance against existing state-of-the-art online and offline algorithms was evaluated using a very large database. The… (More)
Tracking the "Odd": Meter Inference in a Culturally Diverse Music Corpus
In this paper, we approach the tasks of beat tracking, down-beat recognition and rhythmic style classification in non-Western music. Our approach is based on a Bayesian model, which infers tempo, downbeats and rhythmic style, from an audio signal. The model can be automatically adapted to rhythmic styles and time signatures. For evaluation , we compiled and… (More)
Inferring Metrical Structure in Music Using Particle Filters
In this paper, we propose a new state-of-the-art particle filter (PF) system to infer the metrical structure of musical audio signals. The new inference method is designed to overcome the problem of PFs in multi-modal probability distributions, which arise due to tempo and phase ambiguities in musical rhythm representations. We compare the new method with a… (More)
An Efficient State-Space Model for Joint Tempo and Meter Tracking
Dynamic Bayesian networks (e.g., Hidden Markov Models) are popular frameworks for meter tracking in music because they are able to incorporate prior knowledge about the dynamics of rhythmic parameters (tempo, meter, rhythmic patterns, etc.). One popular example is the bar pointer model, which enables joint inference of these rhythmic parameters from a piece… (More)
Bridging the Audio-Symbolic Gap: The Discovery of Repeated Note Content Directly from Polyphonic Music Audio
Algorithms for the discovery of musical repetition have been developed in audio and symbolic domains more or less independently for over a decade. In this paper we combine algorithms for multiple F0 estimation, beat tracking, quantisation, and pattern discovery, so that for the first time, the note content of motifs, themes, and repeated sections can be… (More)