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A Frequency‐Uniform and Pitch‐Invariant Time‐Frequency Representation
Author(s) -
Schulze Sören,
King Emily J.
Publication year - 2019
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201900374
Subject(s) - spectrogram , representation (politics) , invariant (physics) , melody , time–frequency representation , time–frequency analysis , property (philosophy) , mathematics , acoustics , computer science , speech recognition , physics , computer vision , art , musical , visual arts , philosophy , filter (signal processing) , epistemology , politics , political science , law , mathematical physics
We introduce the terms frequency‐uniformity and pitch‐invariance in order to characterize time‐frequency representations. A frequency‐uniform representation has the property that it displays Dirac transients as a straight line in the spectrogram, while a pitch‐invariant representation translates pitch change into shifts, which is adequate for melodic instruments. We propose a novel representation that fulfills both criteria.