A video watermark embedding and extraction method based on inter-layer prediction

Abstract

The invention relates to a video watermark embedding and extracting method based on inter-layer prediction. According to the method, an inter-layer prediction module introduced by an H.264 / SVC (H.264Scalable Video Code) encoding and decoding frame is utilized; firstly watermark information is subjected to binarization processing; and an inter-layer prediction use method of assigning an encoding end by a binarized watermark sequence to input different macro blocks of a video sequence frame image in the encoding process is utilized. At a decoding end, by an inter-layer prediction use method ofjudging each macro block of the frame image, the watermark information is extracted to form a watermark binary sequence. Compared to the prior art, the video watermark embedding and extracting methodsolves the problem of loss of part of watermark information in an existing watermark embedding algorithm, which is caused by video encoding and decoding processing after embedding of a watermark, andhas better robustness and higher watermark extraction efficiency.

Description

technical field [0001] The invention relates to a video watermark embedding and extraction method, in particular to a video watermark embedding and extraction method based on interlayer prediction. Background technique [0002] Nowadays, the digital information age has already arrived, and multimedia technology is developing rapidly. Whether it can effectively protect the information security of the Internet and maintain the copyright of digital products has become one of the hot spots for researchers. Most of the digital videos used in daily life are compressed and encoded, and the diversification of video terminals makes video scalable encoding a new requirement. Therefore, the digital watermarking technology for the scalable part of H.264 in MEPG-4 - Scalable Video Code (Scalable Video Code, SVC) video has also become a major trend of current research. Among the existing H.264 / SVC watermarking algorithms, there are few watermarking algorithms based on the codec framework...

AI Technical Summary

Problems solved by technology

Among the existing H.264 / SVC watermarking algorithms, there are few watermarking algorithms based on the codec framework itself. The traditional video watermarking algorithms are all based on image algorithms, and the image watermarking algorithm is directly transplanted into the video watermarking. The disadvantage is that after video codec processing, some watermark information may be lost, and at the same time, an algorithm needs to be independently written for processing

At the same time, most of the algorithms in the existing results are poor in robustness. Even a small attack will damage the watermark, resulting in extraction failure or low similarity between the extracted watermark and the original watermark.

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