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   -> Volume 10, Issue 4

Question: Analysis of broadcasts of audiovisual media
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Adhemar Bultheel (

PostPosted: Wed Dec 12, 2001 7:44 pm    
Subject: Question: Analysis of broadcasts of audiovisual media
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#29 Question: Analysis of broadcasts of audiovisual media

For a project of the university of Antwerp we have to analyse
broadcasts of audiovisual media (radio and television). Ideally we
should be able to semi-automatically segment the broadcast and
identify who speeks and for how long (recognizing the gender of the
speaker would be sufficient).

For the moment we are focussing on the automatic recognition of the
moment when someone starts and stops speaking
("voice-change-recognition") and the moment when a new (camera)shot
starts ("shot-change-recognition").

At first we would be happy to recognize the beginning and the end of
the intervention of a speaker. Later on we would like to also identify
the speaker and recognize the different interventions of the same

Similarly, for the "shot-change-recognition", we only need to identify
a clear "cut" in the images, we do not want to identify people or
analyse camera-movements.

We hope that wavelets can be useful in solving these problems,
but we have no experience with this tool.
So we are looking for people who have successfully used
(or other transformations) to analyse voice and images patterns,
but only in the limited context described above.

Concrete questions could be:
- what are the distinguishing characteristics of a voice and of a stream
images on which voice-change-recognition and shot-change-recognition
can be based?
- what type of wavelet transformations should be used?
- Pointers to literature where these or related problems are discussed,
will be highly appreciated.

Walter Angioletti []
Nico Carpentier []
University of Antwerp
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