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Code Listing by Kamil Wojcicki

Code 1-10 of 12   Pages: Go to  1  2  Next >>  page  






Includes two functions: vec2frames and frames2vec.

vec2frames - splits signal into overlapped frames using indexing and optionally applies windowing.

frames2vec - converts frames to signal using weighted overlap-and-add synthesis.

A demo script is also included.



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



Tapers start and end samples of a given signal for a fade-in and fade-out effect. Fade-in and fade-out durations can be independently controlled. Custom tapering window can be specified also.



Basic implementation of the Phase Spectrum Compensation (PSC) [1] method for single channel speech enhancement is included, along with a demo that illustrates its usage.

References:

[1] A.P. Stark, K.K. Wojcicki, J.G. Lyons...



Implements a MATLAB wrapper function for the PESQ version 2.0 binary [1]. Both narrowband and wideband modes are supported. The narrowband approach (P.862) returns both the raw MOS_PESQ score and its mapping to LQO scale: MOS_LQO as per P.862.1....



Implements triangular filterbank given in [1]. Returns matrix of M triangular filters (one per row), each K coefficients long. The triangular filters are between limits given in R (Hz) and are uniformly spaced on a warped scale defined by forward...



Y = EXPSMOOTH( X, FS, TAU )

Given input sequence X (column vector), sampled at FS Hertz, returns exponentially smoothed output sequence Y. Time constant (in milliseconds) for the exponential smoother is specified in TAU. If X is a...



Provides simple I/O routines, file2cell and cell2file, for reading an ASCII text file to a cell array of strings (one line per cell element) and writing a cell array of strings (columnwise) to an ASCII file, respectively. The routines can be...



This framework facilitates short-time speech processing. A vector containing audio data samples is taken as input, the short-time Fourier transform (STFT) is then computed and the resulting complex spectrum is decomposed into magnitude and phase...



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...