Video digital watermark embedding and detecting system based on DCT (Discrete Cosine Transformation) domain and method thereof

Abstract

The invention relates to a video digital watermark embedding and detecting system based on a DCT (Discrete Cosine Transformation) domain and a method thereof. The system comprises a watermark embedding device and a watermark detecting device, wherein the watermark embedding device comprises a selecting unit for selecting an embedding domain and an embedding unit for embedding legal watermark information in the embedding domain; and the watermark detecting device comprises an extracting unit for detecting and extracting the watermark information of video data to be detected and a comparing unit for identifying copyright information. By embedding the imperceptible watermark information in the digital video, the invention can detect and trace the copyright information contained in the digital video, ensures that the protected digital media content is not randomly reproduced and spread, protects digital media content suppliers and the whole industry chain, and overcomes the existing defects in the prior art.

Description

technical field [0001] The invention relates to the technical field of multimedia digital watermarking, in particular to a DCT domain-based video digital watermark embedding and detection system and method thereof. Background technique [0002] With the popularization of network communication, many traditional media contents are transformed into digital. In the wireless field, with the evolution of mobile networks from the second generation to the third generation, mobile users will be able to conveniently and quickly access digital media contents on the Internet, based on The application of digital media content over wired or wireless networks is about to be a new tradition in the information age. However, the security issue of digital media content has become a bottleneck issue, which once restricted the process of informatization. [0003] Mature cryptography can solve secure transmission and access control. It prevents others from obtaining the information that needs to...

AI Technical Summary

Problems solved by technology

DRM usually adds authentication information to multimedia data to limit the use of users, and players, operating systems, and sound cards may also add corresponding DRM modules to cooperate with this restriction

[0005] For traditional cryptography, with the rapid improvement of computer processing power, this method of increasing the secret level of the system by continuously increasing the length of the key becomes less and less safe. Once decrypted, the digital media content can be copied at will. , dissemination, this is the superdistribution of digital media content (Superdistribution) problem, it has caused huge losses to media content manufacturers, thus restricting the progress of digital multimedia applications

[0006] As for the principle of DRM technology, it can be seen that the complexity of the technology is relatively high, and it needs the cooperation of software and hardware to complete. There are many processes, the control is difficult, and there are too many restrictions on users, and the experience is very poor.

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