Acoustic event detection based on feature-level fusion of audio and video modalities

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hdl:2117/13630
Document typeArticle
Defense date2011-03-15
PublisherHINDAWI
Rights accessOpen Access
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Abstract
Acoustic event detection (AED) aims at determining the identity of sounds and their temporal position in audio signals. When
applied to spontaneously generated acoustic events, AED based only on audio information shows a large amount of errors, which are mostly due to temporal overlaps. Actually, temporal overlaps accounted for more than 70% of errors in the realworld interactive seminar recordings used in CLEAR 2007 evaluations. In this paper, we improve the recognition rate of acoustic events using information from both audio and video modalities. First, the acoustic data are processed to obtain both a set of spectrotemporal features and the 3D localization coordinates of the sound source. Second, a number of features are extracted from video recordings by means of object detection, motion analysis, and multicamera person tracking to represent the visual counterpart of several acoustic events. A feature-level fusion strategy is used, and a parallel structure of binary HMM-based detectors is employed in our work. The experimental results show that information from both the microphone array and video cameras is useful to improve the detection rate of isolated as well as spontaneously generated acoustic events.
Description
Research article
CitationButko, T. [et al.]. Acoustic event detection based on feature-level fusion of audio and video modalities. "Eurasip journal on advances in signal processing", 15 Març 2011, vol. 2011, p. 1-11.
ISSN1687-6172
Publisher versionhttp://www.hindawi.com/journals/asp/2011/485738/
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