Spread spectrum based digital audio watermarking

This paper presents a comprehensive survey of the very recent advancements in the field of spread spectrum watermarking of audio data. An exhaustive literature overview of each of these in terms of the methodology, advantages, challenges, applications and future prospects has been discussed. These techniques range from aiming at improving robustness, making watermarks more imperceptible, prevention against the wide range of attacks on audio data. This paper also reveals the challenges that are faced by the researchers working in this domain, that are yet to be tackled and thus have a research potential. To the best of our knowledge there is no recent study discussing the various spread spectrum based audio watermarking techniques and thus our work will serve as the foundation for the new comer’s keen on further research in this area.