This is machine translation

Translated by Microsoft
Mouseover text to see original. Click the button below to return to the English version of the page.

Note: This page has been translated by MathWorks. Click here to see
To view all translated materials including this page, select Country from the country navigator on the bottom of this page.

Constant-Q, Data-Adaptive, and Quadratic Time-Frequency Transforms

1-D CQT, 1-D Inverse CQT, Empirical mode decomposition, Hilbert-Huang transform, Wigner-Ville distribution

Obtain the constant-Q transform (CQT) of a signal, and invert the transform for perfect reconstruction. Perform data-adaptive time-frequency analysis of nonlinear and nonstationary processes. Decompose a nonlinear or nonstationary process into its intrinsic modes of oscillation. Obtain instantaneous frequency estimates of a multicomponent nonlinear or nonstationary signal. Return the Wigner-Ville and cross Wigner-Ville distributions of signals.


cqtConstant-Q nonstationary Gabor transform
icqtInverse constant-Q transform using nonstationary Gabor frames
emdEmpirical mode decomposition
hhtHilbert-Huang transform
wvdWigner-Ville distribution and smoothed pseudo Wigner-Ville distribution
xwvdCross Wigner-Ville distribution and cross smoothed pseudo Wigner-Ville distribution


Signal Multiresolution AnalyzerDecompose signals into time-aligned components


Nonstationary Gabor Frames and the Constant-Q Transform

Learn about frequency-adaptive analysis of signals.