MP4 file encapsulation format-based video authentication watermark embedding and extraction method
A watermark embedding and watermark extraction technology, applied in the field of information security, can solve the problems of lack of implementation efficiency and computational complexity, and achieve real-time operation, high fidelity, and high efficiency
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[0028] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.
[0029] Such as figure 1 As shown, the specific steps are:
[0030] The first step is to read the sample data to be embedded in the MP4 video file, use the HMAC digital signature algorithm, the user enters the password as the key, and calculate the digital signature S of the sample data contained in each block in units of blocks i , get the watermark sequence {S 1 , S 2 ,...,S n}, where n is the total number of blocks in the video;
[0031]Described MP4 video file refers to: conform to the video file of ISO / IEC 14496-14 standard, be made up of several containers that encapsulate data, specifically by: have and ...
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