| With the rapid iteration of Internet technology and multimedia technology,infringers can quickly download,copy and illegally disseminate video,making digital video facing serious piracy challenges.In particular,the typical application scenarios,such as online live broadcast and multimedia social platforms need high real-time scenarios and high-robustness scenarios.Therefore,a new robust video watermarking method is proposed to solve the problem of video copyright protection for typical application scenarios.In the high real-time scenarios,most of the existing robust video watermarking methods in the compressed domain choose individual Quantified Discrete Cosine Transform(QDCT)coefficients as the watermark carrier,and the robustness is not high.In the high-robustness scenarios,the original domain robust video watermarking method can decode the video into frames,which can be combined with various frequency domain transforms,however,the existing robust video watermarking methods in the original domain pay too much attention to improving the robustness of the method,while neglecting the payload capacity of the watermark.To solve these problems,two robust video watermarking methods are designed in this paper,including:(1)Aiming at the low robustness of the compressed domain method in high real-time scenarios,a robust video watermarking method based on the QDCT global equalization strategy is proposed.Firstly,the number of non-zero coefficients is used to select the blocks with both texture and high spatial complexity,and then the sum of all the coefficients in the block pairs is calculated,according to the sum of the coefficients and the watermark information,all the non-zero coefficients in the block are modified by the global equalization strategy to satisfy the block-pair coefficients and rules.Experimental results show that the proposed method is more robust than the existing robust video watermarking method in the compressed domain under the condition of ensuring high visual quality of the watermarked video,at most,they increased by 10.3% and 15.2% respectively.(2)To solve the problems of robustness and imbalanced embedding capacity of the original domain method in high-robustness scenarios,a high-capacity robust video watermarking method in the original domain is proposed.First,the U-channel of the video frame was transformed by using Dual-Tree Complex Wavelet Transform(DTCWT).Then,the real and virtual parts of the coefficients are separated and the Discrete Cosine Transform(DCT)was applied to extract two sets of candidate coefficients,by modifying the candidate coefficients on each sub-band to simulate the watermark embedding,it is found that the real part of the watermark retains the robustness of DTCWT shift-invariant better,according to the video resolution,the embedding strategy at different levels is chosen adaptively,and the watermark is embedded by modifying the real part of the candidate coefficients on each sub-band.Experimental results show that the robustness of the proposed method is nearly 100% against noise and various geometric attacks while ensuring the high visual quality of the watermarking video,compared with the existing DTCWT method,the embedded capacity is increased by three times. |
