Multipitch estimation of piano sounds using a new probabilistic spectral smoothness principle

  • Authors:
  • Valentin Emiya;Roland Badeau;Bertrand David

  • Affiliations:
  • INRIA, Centre lnria Rennes--Bretagne Atlantique, Rennes, France and Institut Télécom, Télécom ParisTech, CNRS, LTCI, Paris, France;Institut Télécom, Télécom ParisTech, CNRS, LTCI, Paris, France;Institut Télécom, Télécom ParisTech, CNRS, LTCI, Paris, France

  • Venue:
  • IEEE Transactions on Audio, Speech, and Language Processing
  • Year:
  • 2010

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Abstract

A new method for the estimation of multiple concurrent pitches in piano recordings is presented. It addresses the issue of overlapping overtones by modeling the spectral envelope of the overtones of each note with a smooth autoregressive model. For the background noise, a moving-average model is used and the combination of both tends to eliminate harmonic and subharmonic erroneous pitch estimations. This leads to a complete generative spectral model for simultaneous piano notes, which also explicitly includes the typical deviation from exact harmonicity in a piano overtone series. The pitch set which maximizes an approximate likelihood is selected from among a restricted number of possible pitch combinations as the one. Tests have been conducted on a large homemade database called MAPS, composed of piano recordings from a real upright piano and from high-quality samples.