JOERGENSEN2011 - the speech-based envelope power spectrum model

Usage

output = joergensen2011(x,y,fs_input,IO_param)

Description

output = joergensen2011(x,y,fs_input,IO_param) returns the output of signal-to-noise envelope-power (SNRenv) ratio using the multi-resolution speech-based envelope spectrum model (mr-sEPSM) described in Joergensen et al. (2013)

Input parameters

`'',x`	noisy speech mixture
`'',y`	noise alone
`'',fs`	sample rate in Hz
`'',IO_param`	(optional) vector with parameters for the ideal observer that converts the SNRenv to probability of correct, assuming a given speech material. It contains four parameters of the ideal observer formatted as [k q m sigma_s].

Output parameters

'=output.SNRenv': The SNRenv
'=output.P_correct': The probability of correct given the SNRenv. This field is only included if IO_param is specified. Its calculation requires the Statistics ToolBox.

The model consists of the following stages:

A gammatone bandpass filterbank to simulate the auditory filters
An envelope extraction stage via the Hilbert Transform
A modulation filterbank
Computation of the long-term envelope power (output.SNRenv)

5) A decision mechanism based on a statistically ideal observer (output.P_correct)

References: