METHOD AND SYSTEM FOR EMBEDDING INFORMATION AND AUTHENTICATING A H.264 VIDEO USING A DIGITAL WATERMARK

摘要

Method and system for embedding information and authenticating a H.264 video using a digital watermark. It comprises a watermarking and H.264 video stream generation module (100) for embedding a watermark in non-entropy-coded H.264 syntax elements (H.264_SE), processing each frame j to pseudorandomly determine whether a given macroblock is a candidate macroblock for conveying the watermark and check whether a determined set of conditions to watermark a selected coefficient (COEFS) of a selected block (BLOCKS) of the candidate macroblock are met, which are met when the candidate macroblock is a 4×4 intra coded macroblock (I4x4) and the selected block of the candidate macroblock to convey the watermark belongs to a predefined set of candidate blocks and the intra prediction modes of its successive adjacent blocks do not take as input the value of the selected block. The module (100) then embed the watermark in the selected coefficient (COEFS) of the selected block (BLOCKS) meeting the set of conditions.