Separation of a monaural audio signal into harmonic/percussive components by complementary diffusion on spectrogram
Nobutaka Ono, Ken‐ichi Miyamoto, Jonathan Le Roux, Hirokazu Kameoka, Shigeki Sagayama · 2008
In this paper, we present a simple and fast method to sep-arate a monaural audio signal into harmonic and percussive components, which is much useful for multi-pitch analysis, automatic music transcription, drum detection, modification of music, and so on. Exploiting the differences in the spectro-grams of harmonic and percussive components, the objective function is defined in a quadrature form of the spectrogram gradients. Applying the auxiliary function approach to that, simple and fast update equations are derived, which guaran-tee the decrease of the objective function at each iteration. We show some experimental results by applying our method to popular and jazz music songs. 1.