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Subject = MPEG;
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Displaying Results 1 - 3 of 3 on page 1 of 1
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A framework for event detection in field-sports video broadcasts based on SVM generated audio-visual feature model. Case-study: soccer video
(2004)
Sadlier, David A.; O'Connor, Noel E.; Murphy, Noel; Marlow, Seán
A framework for event detection in field-sports video broadcasts based on SVM generated audio-visual feature model. Case-study: soccer video
(2004)
Sadlier, David A.; O'Connor, Noel E.; Murphy, Noel; Marlow, Seán
Abstract:
In this paper we propose a novel audio-visual feature-based framework, for event detection in field sports broadcast video. The system is evaluated via a case-study involving MPEG encoded soccer video. Specifically, the evidence gathered by various feature detectors is combined by means of a learning algorithm (a support vector machine), which infers the occurrence of an event, based on a model generated during a training phase, utilizing a corpus of 25 hours of content. The system is evaluated using 25 hours of separate test content. Following an evaluation of results obtained, it is shown for this case, that both high precision and recall statistics are achievable.
http://doras.dcu.ie/399/
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An experiment in audio classification from compressed data
(2004)
Jarina, Roman; O'Connor, Noel E.; Murphy, Noel; Marlow, Seán
An experiment in audio classification from compressed data
(2004)
Jarina, Roman; O'Connor, Noel E.; Murphy, Noel; Marlow, Seán
Abstract:
In this paper we present an algorithm for automatic classification of sound into speech, instrumental sound/ music and silence. The method is based on thresholding of features derived from the modulation envelope of the frequency limited audio signal. Four characteristics are examined for discrimination: the occurrence and duration of energy peaks, rhythmic content and the level of harmonic content. The proposed algorithm allows classification directly on MPEG-1 audio bitstreams. The performance of the classifier was evaluated on TRECVID test data. The test results are above-average among all TREC participants. The approaches adopted by other research groups participating in TREC are also discussed.
http://doras.dcu.ie/395/
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Speech-music discrimination from MPEG-1 bitstream
(2001)
Jarina, Roman; Murphy, Noel; O'Connor, Noel E.; Marlow, Seán
Speech-music discrimination from MPEG-1 bitstream
(2001)
Jarina, Roman; Murphy, Noel; O'Connor, Noel E.; Marlow, Seán
Abstract:
This paper describes a proposed algorithm for speech/music discrimination, which works on data directly taken from MPEG encoded bitstream thus avoiding the computationally difficult decoding-encoding process. The method is based on thresholding of features derived from the modulation envelope of the frequency-limited audio signal. The discriminator is tested on more than 2 hours of audio data, which contain clean and noisy speech from several speakers and a variety of music content. The discriminator is able to work in real time and despite its simplicity, results are very promising.
http://doras.dcu.ie/332/
Displaying Results 1 - 3 of 3 on page 1 of 1
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2004 (2)
2001 (1)
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