Abstract : HRHATRAC combines the last improvements regarding the fast subspace tracking algorithms with a gradient update for adapting the signal poles estimates. It leads to a line spectral tracker which is able to robustly estimate the frequencies, even in a noisy context, when the lines are close to each other and when a modulation occurs. HRATRAC is also successfully applied in this paper to a piano note recording.
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Bertrand David, Roland Badeau, Gael Richard. HRHATRAC Algorithm for Spectral Line Tracking of Musical Signals. International Conference on Acoustics, Speech, and Signal Processing ICASSP'06, 2006, Toulouse, France. pp.45-48. ⟨hal-00479785⟩