Self-adaptive robust video watermarking method based on AVS (Audio Video Standard)

Abstract

The invention discloses a self-adaptive robust video watermarking method based on AVS (Audio Video Standard), which mainly solves the problems of high complexity, non-blindness, great gap between the current method and the AVS, and the like in the current method. When watermarks are embedded, a discrete cosine transformation low-frequency coefficient visual masking value corresponding to each subblock of video frame I is firstly calculated according to a Watson model; the energy of each subblock is sequenced in a descending order; and a large-energy subblock is selected as a watermark embedding position to be in secret key storage. Watermark embedding strength is controlled through the low-frequency coefficient visual masking value in a self-adaptive manner so as to embed the watermarks. When the watermarks are extracted, the embedded watermarking subblocks are found according to the secret key at first; and then the watermarks are extracted through comparing the relation between the subblock discrete cosine transformation low-frequency coefficient and a threshold value. In the invention, the watermark embedding and extracting arithmetic is simple; the embedding position and strength are self-adaptive; with better transparency, robustness and real-time property, the method belongs to original basic research work and meets the copyright protection needs of mass video products after the large-scale popularization and commercial application of the AVS; and the method has broad market application prospect.

Description

technical field [0001] The invention belongs to the technical field of information processing, relates to self-adaptive selection of watermark embedding position and self-adaptive control of watermark embedding strength, and can be used for effective copyright protection of AVS digital video products. Background technique [0002] The development of network technology and the popularization of computers have provided convenient channels for people to obtain information. People can easily obtain various multimedia information on the Internet, but the problem of piracy of multimedia products has become increasingly serious. Conservation issues loomed. At present, the technologies used for copyright protection mainly include: encryption technology, digital signature and digital watermark technology, among which the development of encryption technology and digital signature has been relatively mature. Cryptography technology needs to encrypt information into ciphertext. With th...

AI Technical Summary

Problems solved by technology

[0006] In summary, the existing video watermarking methods mainly have the following deficiencies: 1) they are closely integrated with international video codec standards such as MPEG, and are not suitable for the new generation of AVS audio and video codec standards with independent intellectual property rights in my country; 2) although they have Strong robustness, but the complexity of the watermark embedding and extraction algorithm is high, which cannot meet the needs of real-time video processing; 3) The watermark embedding and extraction are not adaptive enough; 4) The human eye video masking model is not used

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