A robust zero watermarking algorithm for stereo audio signals

Zero-watermarking techniques constructs zero watermarks without modifying the original host audio signal. This paper presents a robust zero-watermarking algorithm for stereo audio signals. The proposed algorithm exploits inter-channel redundancy of stereo audio signal in order to construct zero watermarks binary sequence. Here, the features are extracted from DWTDCT-SVD domain to construct zero watermarks, and are found to be robust against modified discrete cosine transform (MDCT)-based perceptual stereo audio coding schemes. Extensive experimental results assure that the proposed watermarking scheme is highly secure as well as robust to common attacks like, MP3 compression, cropping, filtering, re-sampling, amplitude scaling and re-quantisation, etc. To the best of our knowledge, zero-watermarking algorithm based on stereo audio properties is proposed first time. Copyright © 2016 Inderscience Enterprises Ltd.