bakk
🎓 "Digital audio-watermarking for analog transmission channels", 2014, Bachelor Thesis, TU Wien
Science Score: 44.0%
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Low similarity (12.0%) to scientific vocabulary
Keywords
Repository
🎓 "Digital audio-watermarking for analog transmission channels", 2014, Bachelor Thesis, TU Wien
Basic Info
- Host: GitHub
- Owner: mpgirro
- Language: MATLAB
- Default Branch: master
- Homepage: https://max.irro.at/pub/bakk/
- Size: 8.26 MB
Statistics
- Stars: 20
- Watchers: 2
- Forks: 3
- Open Issues: 0
- Releases: 0
Topics
Metadata Files
README.md
Bachelor Thesis
Note: there is the occasional change in this repository, but only for minor updates of the HTML version of the thesis document.
What is this?
This is the code and thesis of my bachelor project I wrote in 2013/2014 at TU Wien. It is about the implementation of an audio watermarking algorithm aimed for analog communication channels and its utilisation in an application framework.
If you want to cite the original thesis (german language), you can use the following BibTeX entry:
@mastersthesis{Irro2014,
document_type = {Bachelor Thesis},
author = {Maximilian Irro},
title = {Digital Audio-Watermarking für analoge Übertragungsstrecken},
school = {Interactive Media Systems Group, TU Wien},
type = {Bachelor Thesis},
year = {2014},
month = {June},
keywords = {audio, watermarking},
timestamp = {20140624},
url = {https://max.irro.at/pub/bakk/thesis.pdf}
}
Abstract
While digital audio watermarking is already a widespread practice, most research only concern copyright protection mechanisms. An aim on open information integration is hardly ever a focus of development goals. Yet there are use cases were additional information in audio signals would be of most value. Especially digital/analog (DA) conversion processes tend to lose all sorts of metadata, for them not being translated into acoustic signals. This is where watermarks may come to aid. Also they could be utilized to add additional information to radio and TV broadcast which would make them accessible not only to the receiving device.
This paper describes the implementations of an existing watermarking algorithm claiming to be capable of enduring DA conversions. Additionally a framework is proposed to utilize the algorithm in a developed communication protocol with synchronization-codes and error-correction mechanisms to provide a well defined, stable communication channel.
Usage
The projects is a prototypical MATLAB implementation. There are basically two functions to use:
encoder
The encoder module is dead simple. Give it a digital signal (= a sample sequence), the data you want to encode and the sampling frequency of the signal and it will give you the samples of the modified signal.
data = randi([0 1], 1, 100);
[signal,fs] = audioread(’test.wav’);
[modSignal, count] = encoder(signal, data, fs);
audiowrite(’result.wav’,modSignal, fs);
decoder
The decoder module is even simpler. Give it a watermarked signal and it's sampling frequency and it will give you the encoded bits.
[signal,fs] = audioread(’result.wav’);
data = decoder(signal,fs);
Change Settings
To change the default settings, use SettingSingleton object.
sObj = SettingSingleton.instance();
sObj.setDwtWavelet(’db2’);
sObj.setDwtLevel(8);
sObj.setSubbandLength(10);
% etc...
Those alterations are best done by utilising a preset script and have to be executed before every run of encoder/decoder.
Owner
- Name: Maximilian Irro
- Login: mpgirro
- Kind: user
- Location: Vienna, Austria (EU)
- Company: @viesure
- Website: https://max.irro.at
- Repositories: 42
- Profile: https://github.com/mpgirro
Citation (CITATION.cff)
cff-version: 1.2.0
message: If you use this software, please cite the thesis from preferred-citation.
authors:
- family-names: Irro
given-names: Maximilian
title: Digital audio-watermarking for analog transmission channels
date-released: 2014-06-24
version: 1.0.0
repository-code: https://github.com/mpgirro/bakk
institution: TU Wien
preferred-citation:
authors:
- family-names: Irro
given-names: Maximilian
title: Digital audio-watermarking for analog transmission channels
year: 2014
thesis-type: "Bachelor thesis"
type: thesis
keywords:
- audio
- watermarking
languages:
- en
url: https://max.irro.at/pub/bakk/thesis.pdf
GitHub Events
Total
Last Year
Committers
Last synced: 7 months ago
Top Committers
| Name | Commits | |
|---|---|---|
| Maximilian Irro | m****x@i****t | 279 |
Committer Domains (Top 20 + Academic)
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Last synced: 7 months ago
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- Total pull requests: 0
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- Average comments per issue: 0
- Average comments per pull request: 0
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- Bot pull requests: 0
Past Year
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- Pull requests: 0
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- Issue authors: 0
- Pull request authors: 0
- Average comments per issue: 0
- Average comments per pull request: 0
- Merged pull requests: 0
- Bot issues: 0
- Bot pull requests: 0