Audio watermarking
Rapid and widespread copying of copyrighted audio data has become a problem in this current age due to the ease of doing it. Usually, it is impossible to determine the originator of the illegal copies of a file. Some schemes have been developed to address this issue; one way is by inaudibly...
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| Format: | Final Year Project |
| Language: | English |
| Published: |
2015
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| Subjects: | |
| Online Access: | http://hdl.handle.net/10356/65304 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Rapid and widespread copying of copyrighted audio data has become a
problem in this current age due to the ease of doing it. Usually, it is impossible to
determine the originator of the illegal copies of a file. Some schemes have been
developed to address this issue; one way is by inaudibly encoding each legal copy
with a unique signature (a watermark) and thus, correct identification of the signature
can aid in finding the person responsible.
This project attempted to improve an existing algorithm by modifying the
way watermarks are encoded and decoded. This was achieved by capitalizing the fact
that stereo system has 2 channels: instead of marking only one channel or both
channels similarly, the scheme modifies them in different but related way. The 2nd
channel serves as reference and helps to determine the actual value of the 1st channel.
This scheme also allows the recovery process to return a decoded watermark not only
whether it has binary value of 0 or 1 but also whether they were conclusively so and
thus can aid in preventing false identification. |
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