A Semi-fragile Video Watermarking Scheme based on H.264
Gui Feng · Communications technology · 2012
A novel low-bit rate H.264/AVC-based video certification scheme of semi-fragile watermarking is proposed.The signature code extracted from I-frame energy block is used to modify the relationship between a pair of AC coefficients,thus to complete the watermark embedment of watermarking in the I-frame.In the P-frame,by introduction of a reference watermark bit for selection of the movement component,and through modulation on parity of the selected movement component,the watermark embedment is completed.In the paper,the adoption of Lagrangian optimization algorithm in I-frame and Lagrangian cost function-type solution in P-frame could effectively reduce the rate-raising caused by improved watermarking embedment.Experiments prove the effectiveness and feasibility of this algorithm.