Introduction
	Introduction Initial Proposal Project Description
Background Information
	Psychoacoustic Model Filter Banks
Project Research
	Research Findings List of MATLAB Code Simulations
Further Work
	Extensions to Research Wavelets
References
About Us

List of MATLAB Code

Here are the MATLAB files that we developed to implement our audio compression scheme:

Psychoacoustic Model

dbinv.m - Converts power in decibels to power in magnitude
hz2bark.m - Converts Hertz frequency to Barks frequency
normalize.m - Normalizes power spectrum
psd.m - Calculates power spectral density
find_tones.m - Finds tone maskers
noise_masker.m - Finds the noise maskers
check_maskers.m - Eliminates maskers that are either within a critical band or covered by the absolute threshold of hearing
mask_threshold.m - Calculates masking threshold of each mask
global_threshold.m - Gets overall masking

Filter Banks

Quantization

Compression

readInput.m - Performs all the compression schemes on a generic .wav file
encode.m - Compresses a .wav file or portion of that file
performEncoding.m - Compresses a given .wav file with a specified compression scheme

Testing

plots.m - Plots psychoacoustic model information
pureSine.m - Encodes a pure sine wave with all the compression schemes
sineClose.m - Encodes a two sine waves close together with all the compression schemes
sineFar.m - Encodes a two sine waves far apart with all the compression schemes