High Capacity Watermarking Algorithm based on Energy Modulation for Compressed Video

A high capacity watermarking algorithm with high computational efficiency, energy modulated watermarking (EMW), has been proposed based on modulating the energy of certain image regions. During the modification, the Watson perceptual model is employed to restrict the modified magnitude of coefficients. The watermark bits are embedded in a pattern of difference between the energy of individual blocks and the mean energy for all blocks. Although obtaining only a half payload of the multipath trellis-coded modulation (MTM) method, the EMW algorithm has much lower complexity which makes it can meet the real-time requirement in video watermarking applications. Moreover, the experimental results show that the EMW algorithm performs better on watermark´s visual quality impact, robustness than the MTM method