[EMS-NEWS]
> Subject: C4DM Seminar: Wednesday 17/11/2004 11.30am room 105
>
> Dear all,
>
> Apologies for any cross-posting.
>
> The following research seminar will be presented
> at 11.30am Wednesday 17 of November in Room 105 Electronic
> Engineering, Queen Mary, University of London.
>
> Emmanuel Vincent from the Centre for Digital Music at Queen Mary,
> University of London will be presenting the seminar:
>
> Instrument models for source separation and transcription of music
> recordings
>
> Abstract:
> For about fifteen years the study of ensemble music recordings has
> focused on two distinct viewpoints: source separation and polyphonic
> transcription. Source separation tries to extract from a recording the
> signals corresponding to each musical instrument playing. Polyphonic
> transcription aims at describing a recording by a set of parameters:
> names of the instruments, pitch and loudness of the notes, etc.
> Existing
> methods, based on spatial and spectro-temporal analysis of the
> recordings, provide satisfying results in simple cases. But their
> performance generally degrades fast with more instruments than a fixed
> limit, under reverberant conditions, with instruments of similar pitch
> ranges or with notes at harmonic intervals.
>
> In this talk, we show that these problems can be reduced using specific
> models of instrumental sources trained on solo data. We design
> probabilistic instrument models inspired from Independent Subspace
> Analysis (ISA) that take into account harmonicity, timbre and temporal
> evolution. Then we exploit these models to separate and transcribe
> realistic recordings, among which a duo CD track and synthetic
> convolutive or underdetermined mixtures of solo CD tracks.
>
> All are welcome to attend
>
> Dr. Juan P. Bello
> Centre for Digital Music
> Electronic Engineering Department,
> Queen Mary, University of London
> phone: 020 7882 5528
> Info about seminars:
> http://www.elec.qmul.ac.uk/research/seminars/index.html
> If you wish to be removed from the list, please send me an email and
> I'll be happy to do so.
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