Using additive interpolation-error expansion for reversible digital watermarking in audio signals

Data hiding is a technique that embeds an imperceptible and statistically undetectable signal to the digital content. Reversible watermarking is able to restore the original signal without distortion after data extraction, this property is useful in several application as military communications, medical diagnostics and legal evidence. In this paper, a reversible audio watermarking scheme using an interpolation technique is proposed. From experimental results the high capacity and auditive transparency of the proposed scheme are shown. Moreover, a multi-embedding approach is explored. Accordingly, a new subject for research is discovered.