# To perform alaw companding in matlab

The following Matlab project contains the source code and Matlab examples used for to perform alaw companding .
Implements an A-law compander for the input signal.

The following Matlab project contains the source code and Matlab examples used for iso 226 equal loudness level contour signal.
This function will return a 29-point equal loudness contour for your desired phon level.

The following Matlab project contains the source code and Matlab examples used for floyd steinberg dithering algorithm.
This m-file implements the Floyd Steinberg dithering algorithm, which can be considered as a type of image binarization with additional human visual considerations.

The following Matlab project contains the source code and Matlab examples used for homogeneous mask area filter.
fcnHomogeneousMaskAreaFilter performs noise filtering on an image based on searching for the most homogeneous mask within a search area around a pixel of interest.

The following Matlab project contains the source code and Matlab examples used for exports audio data to a .wav file with dithering. .
Writes 32-bit or 64-bit floating point audio data (single or double) to a .

The following Matlab project contains the source code and Matlab examples used for image denoising based on gaussian bilateral filter and its method noise thresholding.
This software release consists of an implementation of the algorithm described in the paper:
B.

The following Matlab project contains the source code and Matlab examples used for image denoising based on non local means filter and its method noise thresholding.
This software release consists of an implementation of the algorithm described in the paper:
B.

The following Matlab project contains the source code and Matlab examples used for cepstral pitch.
This MATLAB exercise implements a pitch period detector based on detecting and tracking peaks in the (real) cepstrum during regions of voiced speech.

The following Matlab project contains the source code and Matlab examples used for uniform quantization.
This MATLAB exercise illustrates the process of uniform quantization of a speech sample using a range of B-bits per sample, and displays the unquantized signal, the quantized signal and the error signal at the selected bit rate along with plots of signal and error power density spectrum, and the histogram of the quantization error signal.

The following Matlab project contains the source code and Matlab examples used for this exercise designs an automatic gain control (agc) system for speech companding. .
This exercise designs an automatic gain control system for a speech waveform based on short-time estimates of the
speech signal variance (or equivalently, the short-time standard deviation).

The following Matlab project contains the source code and Matlab examples used for cepstral waterfall.
This MATLAB exercise introduces the concept of creating so-called “Waterfall Plots” of frame-by-frame cepstrums/log magnitude spectrums of a time-varying signal such as a speech waveform.

The following Matlab project contains the source code and Matlab examples used for image denoising using evolutionary algorithm.
In this code we use SOMA and wavelet shrinkage to denoise images.

The following Matlab project contains the source code and Matlab examples used for a weighting filter with matlab implementation.
The present code is a Matlab function that provides an A-weighting of a given signal via spectral processing.

The following Matlab project contains the source code and Matlab examples used for beltrami filter.
It has been implemented based on this paper:
J.J. Fernandez, J. M. (2010). Three-dimensional feature-preserving noise reduction for real-time electron tomography (Bd. 20). Madrid, Spain: Digital Signal Processing .

The following Matlab project contains the source code and Matlab examples used for salt and pepper noise reduction.
In this work there are two algorithms for reducing salt and pepper noise as well as random valued impulse noise from gray scale images.

The following Matlab project contains the source code and Matlab examples used for ecg signal compression.
Amplitude Thresholding compression method used here in for ECG signal compression as presented on paper entitled as ECG signal compression with reconstruction via cubic spline approximation by Olga Malgina, Jana Milenkovi, Emil Plesnik, Matej Zajc, Andrej Košir and Jurij F.

The following Matlab project contains the source code and Matlab examples used for vuvuzela filtering with parametric equalizers using system objects.
This soccer season, denoising the noise from the vuvuzela has become very popular, as many fans find the noise from this instrument distracting from the game.

The following Matlab project contains the source code and Matlab examples used for vuvuzela sound denoising algorithm.
The sound denoising algorithm is based on the popular spectral subtraction technique.

The following Matlab project contains the source code and Matlab examples used for stft, mdct and inverses. onset and pitch detection.
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Class name : Signal
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handles basic Signal operations and transforms.

The following Matlab project contains the source code and Matlab examples used for selctive recursive temporal filter for video denoising.
After spatial filtering, there is enough redundancy present in the video frames taken in the temporal direction.

The following Matlab project contains the source code and Matlab examples used for denoising guassian image.
in that project contains two blocks first contains to add noise block.second thing to apply that filter

The following Matlab project contains the source code and Matlab examples used for clipping as a papr reduction technique.
The m-file investigates the effects of high power amplifier and the
channel noise on the OFDM signal and then introduces clipping as
a PAPR reduction method to reduce the HPA effect.

The following Matlab project contains the source code and Matlab examples used for sift pitch detector.
This MATLAB exercise designs and implements a pitch period detector based on detecting and tracking peaks in the autocorrelation of the LPC error signal during regions of voiced speech.

The following Matlab project contains the source code and Matlab examples used for autocorrelation pitch detector.
This MATLAB exercise implements a pitch period detection algorithm using the modified autocorrelation method with a specified center clipping threshold. It analyzes a designated speech utterance on a frame-by-frame basis, using a center-clipped, modified correlation analysis method.

The following Matlab project contains the source code and Matlab examples used for algorithm for noise reduction for speech enhancement.
This is an implementation of alg.

The following Matlab project contains the source code and Matlab examples used for two functions for smoothing denoising of triangular meshes.
Part 1)
Mean face normal filter for smoothing/denoising triangular meshes
Reference:
1) Yagou, Belayev, Ohtake (2002) Mesh smoothing via Mean and Median Filtering applied to face Normals, PGMP - Theory and Applications
2) Zhang and Hamza, (2006) Vertex-based anisotropic smoothing of 3D mesh data, IEEE CCECE
Acknowledgement:
Q.

The following Matlab project contains the source code and Matlab examples used for speckle noise reduction in ultrasound images.
Finding out general tendencies in
speckle noise reduction in ultrasound images" by Juan L.

The following Matlab project contains the source code and Matlab examples used for image noise reduction by local statistics.
Tristan Ursell
Relative Noise Transform
(c) November 2012
Iout=relnoise(Iin,sz,sigma);
Iout=relnoise(Iin,sz,sigma,'field');
[Iout,Ivar]=relnoise(Iin,sz,sigma,.