Abstract
Monaural music sound separation isolates individual instrument sources from a mono-channel polyphonic mixture. The primary challenge is to separate the source partials overlapped in time-frequency regions, especially for the full overlapping cases that at least one source does not have any nonoverlapping partial. Due to the lack of effective methods to separate the sources with full overlapping partials, this paper put forward a relaxed extended common amplitude modulation (RECAM) approach to deal with the octave sound separation, one of the most difficult cases. Our strategy uses a multi-band co-processing way for each short-time partial wave segment. Extensive experiments are conducted on octave mixture samples drawn from the Iowa University Musical Instrument Database. Results confirm that our RECAM achieves the best separation performance. For nonvibrato and vibrato mixtures, the average improvement of RECAM in each measure exceeds 3dB and 2dB, respectively.
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