AVS video digital watermark method based on nonnegative matrix decomposition
A non-negative matrix decomposition and digital watermarking technology, applied in the field of video and multimedia signal processing, can solve the problems of not considering the video time masking effect, complex calculation, poor robustness, etc., to meet the requirements of statistical invisibility and save storage. and computing resources, the effect of improving transparency
Inactive Publication Date: 2009-09-23
XIDIAN UNIV
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This method only uses the static masking characteristics of the human eye when constructing the human visual system model, and does not take into account the unique temporal masking effect of the video.
[0006] 3. Alper Koz, A. Aydin Alatan, Oblivious Spatio-Temporal Watermarking of Digital Video by Exploiting the Human Visual System. IEEE Trans. Circuits Syst. Video Techn. 2008, 18(3): 326-337 Eye vision time contrast limit, adaptive determination of watermark embedding strength, although this method takes into account the temporal masking effect of video, but the calculation is complex and the real-time performance is poor
[0007] 4. Hu Yang, Zhang Chuntian, Su Yuting, Video Information Hiding Algorithm Based on H.264/AVC, Acta Electronics Sinica, 2008, 4(4): 690-694, this method modulates the frame of I frame 4×4 brightness block Intra-prediction mode realizes wate
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[0034] 1. Introduction to basic theory
[0035] 1. Non-negative matrix factorization
[0036] In 1999, Lee and Seung first published the non-negative matrix factorization method, or NMF for short, in Nature. This method is a matrix decomposition method implemented under the condition that all elements in the matrix are non-negative, and all components after decomposition also satisfy the non-negativity restriction. From an algebraic point of view, NMF is a method for discovering data. An intrinsically non-negative algebraic decomposition form or representation.
[0037] NMF has the following characteristics: On the one hand, the low-rank approximation of the original data matrix is obtained through matrix decomposition, so that its intrinsic structural characteristics can be found, and the dimension of data characteristics can be greatly reduced, which improves the operation efficiency and effectively saves storage and computing resources. , which provides an effective tec...
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The invention discloses an AVS video digital watermark method based on nonnegative matrix decomposition, which mainly solves the problems of low transmittance and poor attacking repellence to frame deletion and frame recomposition. The invention generates watermark based on content by utilizing light characteristics of a video I frame and extracts kinetic characteristics of video signals by utilizing the nonnegative matrix decomposition during the watermark embedding, and can self-adaptively adjust the embedding strength and the embedding position of the watermark by combining texture and light characteristics of the video to embed the watermark into intermediate frequency DCT coefficients of prediction residual errors of an I frame light block. During the watermark verification, the I frame is only decoded, the video product is judged whether the watermark is embedded or not by comparison of the extracted watermark and the verification of the error rate of the watermark. The invention has high transmittance and robustness, can be used in the video product with AVS standard, and provides reliable copyright protection for the AVS video product.
Description
technical field [0001] The invention belongs to the technical field of video and multimedia signal processing, and in particular relates to a method for video digital watermarking, which can be used in AVS standard video products and provides copyright protection for AVS video products. Background technique [0002] Video digital watermarking technology is a hot and difficult point in the current research direction of watermarking technology. The hot spot is that the introduction of a large number of consumer digital audio and video products makes the market demand for digital product property rights protection technology with digital watermarking as an important part more urgent. The difficulty lies in that, due to the inherent characteristics of video, people are required to find new and special technologies to operate the video. For example, the huge data scale of video and the real-time requirements of video watermarking determine that many mature image watermarks cannot...
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Inventor 同鸣姬红兵闫涛
Owner XIDIAN UNIV
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