earthat / dwt-svd

Audio Watermarking by DWT-SVD

DWT-SVD

The code is developed using MATLAB R2013a. save these filesa as m files in matlab and then simulate and record sound used as input.

Abstract

This code investigates the development of digital audio watermarking in addressing issues such as copyright protection. Over the past two decades, many digital watermarking algorithms have been developed, each with its own advantages and disadvantages. The main aim of this thesis was to develop a new watermarking algorithm within an existing discrete wavelet Transform (DWT) and singular value decomposition (SVD) framework. This resulted in the development of a combination of DWT-SVD-BFO (bacterial foraging optimisation) watermarking algorithm. In this new implementation, the embedding depth was generated dynamically thereby rendering it more difficult for an attacker to remove, and watermark information was embedded by manipulation of the spectral components in the spatial domain thereby reducing any audible distortion. Further improvements were attained when the embedding criteria was based on bin location comparison instead of magnitude, thereby rendering it more robust against those attacks that interfere with the spectral magnitudes. The further aim of this thesis is to analyze the algorithm from a different perspective.

Improvements were investigated using DWT-SVD and DWT-SVD-BFO algorithms. A comparison of these two algorithms for different watermark images on two types of audio input signal is presented here. The whole thesis work is divided into five main chapters with 4th 5th chapter describing proposed algorithm and results with discussions.

Report

The documentation for this reserach work is available at https://free-thesis.com/product/audio-watermarking-by-dwt-svd-bfo/

Results

dwt-svd's Issues

the group of singular value

Thanks for your project it so help me,
But i want to extraction the image from audio and i need the group singular value of embedding process so that i can use do extraction process ,
if i see in your project , i just find one singular value and i have in trouble to find where the other singular value....

If you don't mind could you help to solve my problem

Thanks...

Error in matlab 2016R version

please help to resolve this error. following error is generated when program moves to embedding.

Error using ones
Size inputs must be integers.

Error in embedding (line 7)
gain=P*ones(1,iter);

then i caste iter to integer, following error is generated.
Error using cat
Dimensions of matrices being concatenated are not consistent.

Error in embedding (line 20)
temp=cat(1,temp,cD{jj+1});

thanks

Difference result

I have run your project , but i got different result between embedding and extraction image
you can see the result