ANALYSIS AND IMPLEMENTATION OF EFFICIENT AUDIO WATERMARKING

Abstract

Audio Watermarking is a newly established engineering field. Audio watermarking is the process of attaching the identity of a copyright owner to a digital audio work that is difficult to remove. The goal of digital audio watermarking is to prevent the audio piracy, and give the artistic work owner the capability to prove the work is theirs.

The main objective of this major project is to develop and implement a dual watermarking scheme, which is robust and can sustain almost all attack on audio file. In the proposed scheme two watermarking scheme are used, so that by combined effect of both watermarking scheme can give a robust watermarking scheme. The feature of the proposed scheme is to resist the synchronization attack and minimum mean square error (MMSE) estimation attack. The synchronization attack which is the key issue with audio watermarking and is resolved is using a more steady synchronization barker code. Embedded strategy adopted resists the synchronization attack more effectively. At second level an energy efficient watermark is embedded which satisfies the power spectrum condition (PSC). Which state that watermark’s power spectrum should be directly proportional to the original signals. The watermark satisfying PSC are proven to be most robust. Energy efficient watermarking scheme resist MMSE as much as possible. Experiments justify that the proposed scheme is inaudible and robust against various attack such as noise adding, resampling, requantization, random cropping and MP3 compression.