The short-time Fourier transform (STFT) is a Fourier-related transform used to determine the sinusoidal frequency and phase content of local sections of...
22 KB (4,055 words) - 09:25, 3 March 2025
In mathematics, the Fourier transform (FT) is an integral transform that takes a function as input then outputs another function that describes the extent...
177 KB (21,313 words) - 14:22, 28 June 2025
fractional Fourier transform (FRFT) is a family of linear transformations generalizing the Fourier transform. It can be thought of as the Fourier transform to...
27 KB (3,937 words) - 02:28, 16 June 2025
In mathematics the finite Fourier transform may refer to either another name for discrete-time Fourier transform (DTFT) of a finite-length series. E.g...
2 KB (298 words) - 14:04, 23 July 2023
sine transform. Hartley transform Short-time Fourier transform (or short-term Fourier transform) (STFT) Rectangular mask short-time Fourier transform Chirplet...
7 KB (1,001 words) - 15:55, 27 May 2025
Fourier transform (FFT) is an algorithm that computes the discrete Fourier transform (DFT) of a sequence, or its inverse (IDFT). A Fourier transform converts...
67 KB (7,809 words) - 05:39, 1 July 2025
generalizations of the Fourier transform, such as the short-time Fourier transform, the Gabor transform or fractional Fourier transform (FRFT), or can use...
38 KB (4,788 words) - 15:31, 27 April 2025
of such a representation is the windowed Fourier transform (also known as the short-time Fourier transform) which localises the signal by modulating...
7 KB (928 words) - 09:37, 3 April 2025
Fourier-transform spectroscopy (FTS) is a measurement technique whereby spectra are collected based on measurements of the coherence of a radiative source...
15 KB (1,889 words) - 05:20, 25 May 2025
The Gabor transform, named after Dennis Gabor, is a special case of the short-time Fourier transform. It is used to determine the sinusoidal frequency...
10 KB (1,518 words) - 01:12, 2 July 2025
Phase retrieval (category Articles with short description)
his collaborators (see References). Here we consider 1-D discrete Fourier transform (DFT) phase retrieval problem. The DFT of a complex signal f [ n ]...
17 KB (2,898 words) - 05:06, 28 May 2025
the Fourier transform – and the fact that two-fold Fourier transform reverses direction – can be interpreted by considering the Fourier transform as a...
22 KB (3,734 words) - 21:42, 19 February 2025
transform is a generalization of the short-time Fourier transform (STFT), extending the continuous wavelet transform and overcoming some of its disadvantages...
13 KB (1,865 words) - 08:28, 21 February 2025
In mathematics, the discrete-time Fourier transform (DTFT) is a form of Fourier analysis that is applicable to a sequence of discrete values. The DTFT...
40 KB (5,076 words) - 15:50, 30 May 2025
mathematics and Fourier analysis, a rectangular mask short-time Fourier transform (rec-STFT) has the simple form of short-time Fourier transform. Other types...
4 KB (823 words) - 17:59, 18 December 2023
Fourier transform infrared spectroscopy (FTIR) is a technique used to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas...
37 KB (4,802 words) - 01:09, 5 June 2025
transform Set partitioning in hierarchical trees Short-time Fourier transform Stationary wavelet transform Time–frequency representation Wavelet Meyer, Yves...
27 KB (3,836 words) - 08:01, 19 June 2025
lowest filter, and n is the number of filters per octave. The short-time Fourier transform of x[n] for a frame shifted to sample m is calculated as follows:...
13 KB (1,680 words) - 05:11, 24 June 2025
In mathematics, the discrete Fourier transform over a ring generalizes the discrete Fourier transform (DFT), of a function whose values are commonly complex...
20 KB (3,992 words) - 20:05, 19 June 2025
same-length sequence of equally-spaced samples of the discrete-time Fourier transform (DTFT), which is a complex-valued function of frequency. The interval...
76 KB (12,338 words) - 20:01, 27 June 2025
Frequency domain (redirect from Fourier domain)
data Reciprocal space Short-time Fourier transform Time–frequency representation Time–frequency analysis Wavelet Wavelet transform – digital image processing...
10 KB (1,193 words) - 21:38, 1 June 2025
for such use. Time–frequency analysis is extended from the classic Fourier approach. Short-time Fourier transform (STFT), Gabor transform (GT) and Wigner...
6 KB (984 words) - 02:01, 29 January 2024
Reassignment method (category Transforms)
technique for sharpening a time-frequency representation (e.g. spectrogram or the short-time Fourier transform) by mapping the data to time-frequency coordinates...
25 KB (4,004 words) - 00:53, 6 December 2024
Dynamic time warping Dynamic Bayesian network Time-frequency analysis techniques: Fast Fourier transform Continuous wavelet transform Short-time Fourier transform...
43 KB (5,025 words) - 15:47, 14 March 2025
other transforms, most notably the Fourier transform and the Mellin transform. Formally, the Laplace transform is converted into a Fourier transform by the...
75 KB (9,485 words) - 15:35, 1 July 2025
with the time and frequency axes that are typical for waves (Fourier and short-time Fourier transforms) or wavelets. The chirplet transform thus represents...
10 KB (1,109 words) - 15:57, 17 April 2025
which Fourier inversion recovers a function from its Fourier transform Short-time Fourier transform or short-term Fourier transform (STFT), a Fourier transform...
2 KB (369 words) - 02:23, 12 February 2025
the Fourier transform on finite groups is a generalization of the discrete Fourier transform from cyclic to arbitrary finite groups. The Fourier transform...
13 KB (2,052 words) - 00:36, 8 May 2025
Phase vocoder (category Articles with short description)
file (typically time expansion/compression and pitch shifting). At the heart of the phase vocoder is the short-time Fourier transform (STFT), typically...
8 KB (948 words) - 23:36, 30 June 2025
Digital signal processing (redirect from Digital transform)
converted from time or space domain to the frequency domain usually through use of the Fourier transform. The Fourier transform converts the time or space information...
27 KB (2,991 words) - 17:50, 26 June 2025