A post processing technique for improved harmonic/percussion separation in polyphonic speech

Thoshkahna, Balaji and Ramakrishnan, KR (2011) A post processing technique for improved harmonic/percussion separation in polyphonic speech. In: ISMIR-The International Society for Music Information Retrieval, October 24-28, Miami USA.

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Abstract

In this paper we propose a postprocessing technique for a spectrogram diffusion based harmonic/percussion decom- position algorithm. The proposed technique removes har- monic instrument leakages in the percussion enhanced out- puts of the baseline algorithm. The technique uses median filtering and an adaptive detection of percussive segments in subbands followed by piecewise signal reconstruction using envelope properties to ensure that percussion is enhanced while harmonic leakages are suppressed. A new binary mask is created for the percussion signal which upon applying on the original signal improves harmonic versus percussion separation. We compare our algorithm with two recent techniques and show that on a database of polyphonic Indian music, the postprocessing algorithm improves the harmonic versus percussion decomposition significantly.

Item Type:	Conference Paper
Publisher:	International Society for Music Information Retrieval
Additional Information:	Copyright of this article belongs to International Society for Music Information Retrieval.
Department/Centre:	Division of Electrical Sciences > Electrical Engineering
Date Deposited:	28 Mar 2013 12:09
Last Modified:	28 Mar 2013 12:09
URI:	http://eprints.iisc.ac.in/id/eprint/46237

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