The aim of this paper is to present a technique to hide data in digital video based on a watermarking approach. The algorithm exploits the side information in the embedding phase; it uses error-correcting codes to improve the achievable robustness and different spatial and temporal masking function to hide the watermark. The watermarking approach is based on an algorithm working in the uncompressed video domain in order to reduce the computational cost. The proposed scheme has been implemented and tested under different attacks, in particular compression and transcoding attacks. The results show that side information and error correcting codes strongly improve the robustness.
In this paper a wavelet domain data hiding technique for color images is presented. The characteristics of this transform domain are well suited for masking consideration, due to its good localization in both space and frequency. The different color sensitivity can be exploited in order to increase the water marking power, and therefore its reliability. Thanks to the multi-resolution nature of the DWT the blind watermark detection can be obtained iterativley. The technique has been successfully evaluated against attacks such as JPEG and JPEG-2000 compressions, filtering, cropping, dithering and D/A A/D conversions.