文摘
This paper proposes a novel multiple watermarking scheme based on orthogonal decomposition (MWOD). In the first phase, based on orthogonal decomposition, the host data selected from multimedia data are divided into mutually independent multiple domains. Then multiple watermarks without need for considering the special correlation among them can respectively be embedded into these different domains even using different embedding algorithms. There is no mutual interference among watermarked domains so that multiple watermarks can be flexibly embedded in the distribution of the multimedia cover. Through theoretical analysis, the security of multiple watermarking operands is validated, which means that MWOD can ensure the security of watermarking operation domains. Therefore, media providers and service providers can embed their unique information step-by-step into digital multimedia using their own operation domain keys in MWOD, which can be used to identify media content’s ownership or trace the illegal redistributors. Experimental results and analysis demonstrate the feasibility and robustness of MWOD.KeywordsMultiple watermarkingOrthogonal decompositionSecurityMultimedia distribution
