Parametric multi-channel separation and re-panning of harmonic sources

M. W. Hansen, J. M. Hjerrild, M. G. Christensen, J. Kjeldskov

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

2 Citations (Scopus)


In this paper, a method for separating stereophonic mixtures into their harmonic constituents is proposed. The method is based on a harmonic signal model. An observed mixture is decomposed by first estimating the panning parameters of the sources, and then estimating the fundamental frequencies and the amplitudes of the harmonic components. The number of sources and their panning parameters are estimated using an approach based on clustering of narrowband interaural level and time differences. The panning parameter distribution is modelled as a Gaussian mixture and the generalized variance is used for selecting the number of sources. The fundamental frequencies of the sources are estimated using an iterative approach. To enforce spectral smoothness when estimating the fundamental frequencies, a codebook of magnitude amplitudes is used to limit the amount of energy assigned to each harmonic. The source models are used to form Wiener filters which are used to reconstruct the sources. The proposed method can be used for source re-panning (demonstration given), remixing, and multi-channel upmixing, e.g. for hi-fi systems with multiple loudspeakers.

Original languageEnglish
Title of host publicationProceedings of the International Conference on Digital Audio Effects, DAFx 2018
EditorsAníbal Ferreira, Matthew Davies
Place of PublicationPortugal
PublisherUniversidade de Aveiro
Number of pages8
Publication statusPublished - 2018
Externally publishedYes
EventInternational Conference on Digital Audio Effects 2018 - Aveiro, Portugal
Duration: 4 Sept 20188 Sept 2018
Conference number: 21st (Website)
http://chrome-extension://efaidnbmnnnibpcajpcglclefindmkaj/ (Proceedings)

Publication series

NameProceedings of the International Conference on Digital Audio Effects, DAFx
PublisherUniversidade de Aveiro
ISSN (Print)2413-6700
ISSN (Electronic)2413-6689


ConferenceInternational Conference on Digital Audio Effects 2018
Abbreviated titleDAFx 2018
Internet address

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