Abstract
An MPEG video hierarchical content watermarking authentication scheme that utilized the local and global features among video frames was proposed to find out whether the content of video had been maliciously changed or not.The two employed kinds of features in the scheme,the global one and the local one,are semi-fragile,which can tolerate the legal content persistent operation and sensitive to the tamper operations.The global feature was abstracted from the relation coefficients of DC coefficient matrix in the I type pictures,which could detect the content tamper with a lower computation payload.After the tamper frame was decided,the tamper positions could be further localized with the local features.Experimental results show the satisfying performance of the proposed scheme.The fit choosing strategy in this scheme can reduce the computing payload about 20 percent.In a word,the content feature based video authentication scheme can lighten the way to build practical video authentication methods.
Published Version
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