Fast Fourier Transform Matlab
Sound You Can See !
Sound View is an Audio Spectrum Analyzer & Spectrograph App. It analyzes sound from the built in microphone, or from the Line in input device, and displays the results in three separate views.
The waveform view displays the raw input signal as a continuous wavy line, where...
Platforms: Mac
License: Commercial | Cost: $1.99 USD | Size: 2.9 MB | Download (51): SoundView Download |
W = mywigner(Ex)W = output Wigner distributionEx = Input electric field (MUST be a column vectorNotes:W = Int(-inf..inf){E(x+y)E(x-y)exp[2ixy]}E(x+y) & E(x-y) are calculated via a FFT (fast Fourier transform) using theshift theorem. The integration is performed via a FFT. Thus it is important for...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (45): Calculate Wigner distribution Download |
Computes the autocovariance of two columns vectors consistently with the var and cov functions.autocov computes the autocovariance between two column vectors X and Y with same length N using the Fast Fourier Transform algorithm from 0 to N-2.The resulting autocovariance column vector acv is given...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (43): Autocovariance Download |
TAL-Vocoder is a vintage vocoder emulation with 11 bands that emulates the sound of vocoders from the early 80???*a*?s. It includes analog modeled components in combination with digital algorithms such as the SFFT (Short-Time Fast Fourier Transform). This vocoder does not make a direct...
Platforms: Mac
License: Shareware | Cost: $0.00 USD | Size: 378.88 KB | Download (46): TAL-Vocoder Download |
The incoming signal is analysed via a FFT (Fast Fourier Transform), resulting in the familiar spectrum plot where the full audio spectrum is split into a number of narrow frequency bands. The outgoing audio is then regenerated by an Inverse FFT. The interesting bit is that the plug-in lets you...
Platforms: Mac
License: Demo | Cost: $29.00 USD | Size: 1.26 MB | Download (47): Spectral Conquest Download |
This applet incorporates some image processing techniques in the Fourier optics domain. You can compute and see the Fourier transform of an object and the convolution between two images. You can also simulate the Vander Lugt correlator (matched filter, phase-only filter and inverse filter) and...
Platforms: Mac
License: Freeware | Size: 10.24 KB | Download (44): Fourier Optics Download |
This article consists of a brief discussion of the energy density over time or frequency that is obtained with the wavelet transform. Also an efficient algorithm is suggested to calculate the continuous transform with the Morlet wavelet. The energy values of the Wavelet transform are compared...
Platforms: Matlab
License: Freeware | Size: 10 KB | Download (48): Continuous Morlet Wavelet Transform Download |
This e-book is based on the Student Edition of MATLAB 7, which includes a symbolic toolbox. The Professional Edition may of course also be used. The goal is to exploit a restricted subset of MATLAB commands and functions to explore most of the elements of undergraduate mathematics. All items from...
Platforms: Matlab
License: Freeware | Size: 40.96 KB | Download (45): Alternative Mathematics using MATLAB 7 Download |
GFourier can help you use Fourier Analysis for image restoration. GFourier calculates the Fourier Transform of a given image and allows the use of filters in the frequency domain. The Inverse Fourier Transform is then used to substitute original image.. Get GFourier at SourceForge.net. Fast,...
Platforms: *nix
License: Freeware | Size: 65.54 KB | Download (228): GFourier Download |
SciCraft is an open source data analysis software developed in Python which allows you to access advanced mathematical functions through an easy-to-use graphical interface. Typical methods can be anything from areas like statistics, chemometrics and artificial intelligence and from languages like...
Platforms: Linux
License: Freeware | Size: 2.53 MB | Download (675): SciCraft for Linux Download |
CHAPTER 1: FOURIER ANALYSIS1.1 CONTINUOUS-TIME FOURIER SERIES (CTFS)1.2 PROPERTIES OF CTFS 1.2.1 Time-Shifting Property 1.2.2 Frequency-Shifting Property 1.2.3 Modulation Property1.3 CONTINUOUS-TIME FOURIER TRANSFORM (CTFT)1.4 PROPERTIES OF CTFT 1.4.1 Linearity 1.4.2 Conjugate Symmetry 1.4.3 Real...
Platforms: Matlab
License: Freeware | Size: 143.36 KB | Download (50): MATLAB for Digital Communication Download |
Conversions of these routines into Matlab.From:http://pubs.usgs.gov/of/1995/ofr-95-0077/o...77.htmlAnderson, W.L, 1983, Fourier cosine and sine transforms using lagged convolutions in double-precision (Subprograms DLAGFO/DLAGF1): U.S. Geological Survey Open-File Report 83-320, 38 p. 026 DLAGF0/...
Platforms: Matlab
License: Freeware | Size: 51.2 KB | Download (44): dlagf01 Download |
This is an old program (1.999) that I have written for understanding radiation patterns of antennas. Basically I was looking for the relationship between interference diagram (Fourier transform of ilumination, usually called Array Factor) and 3D radiation pattern of the Array. For that reason, it...
Platforms: Matlab
License: Freeware | Size: 225.28 KB | Download (48): Antenna's Array Synthesis Download |
Takes a vector containing audio data samples as an input, computes short-time Fourier transform (STFT) and plots the STFT power spectrum trajectories across time.http://www.downloadplex.com/index.php?a=admin&b=programs&os=Scripts&add
Platforms: Matlab
License: Freeware | Size: 2.87 MB | Download (38): Speech Spectrogram Download |
Simple implementation of [1] with small modification. Hopefully this is going to help beginners in speech/audio signal processing.[1] X. Zhu, G. T. Beauregard and L. L. Wyse, "Real-Time Signal Estimation From Modified Short-Time Fourier Transform Magnitude Spectra", IEEE Trans. on Audio, Speech,...
Platforms: Matlab
License: Freeware | Size: 40.96 KB | Download (43): Time-scale/pitch modification Download |
This code implements automatic gain control for audio signals, which attempts to apply a smoothly-varying gain to an audio waveform in order to keep its energy close to some target level. This version also tries to balance the energy in individual frequency bands. It works by taking the...
Platforms: Matlab
License: Freeware | Size: 389.12 KB | Download (49): Time-frequency Automatic Gain Control (AGC) Download |
Computes mel frequency cepstral coefficient (MFCC) features from a given speech signal. The speech signal is first preemphasised using a first order FIR filter with preemphasis coefficient. The preemphasised speech signal is subjected to the short-time Fourier transform analysis with a specified...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 307.2 KB | Download (39): HTK MFCC MATLAB Download |
Solves the difficulty of computing and visualizing the DFT of an array that can be caused by (a) the units of frequency, (b) the mirroring effect, (c) the complex nature.% Inputs: -t, a time array evenly spaced 0:tstep:T% -x, the function array% -pl, {0,1} to display plot% Outputs: - f a...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 10 KB | Download (49): DFT easy computation and display Download |
This package provides implementations of several spectral (FFT,DCT)saliency algorithms for images.There are several methods (multichannel_method) to calculate themultichannel saliency:'fft': by default the same as 'fft:whitening''fft:whitening' Uses spectral whitening to calculate the saliency of...
Platforms: Matlab
License: Shareware | Cost: $0.00 USD | Size: 102.4 KB | Download (40): Spectral / Phase-based Visual Saliency Download |
Advanced hexadecimal editor. Few important programs features: 6 color schemes to interpret bytes visually. Every of them tryies to fit some functionality (for example text analyzing) and user preferences Unlimited undo Access to logical disks under Windows NT/2000/XP Disassembler Import and...
Platforms: Windows
License: Freeware | Size: 485 KB | Download (755): Hexplorer Download |