High-robustness audio/video cross watermarking algorithm

Abstract

The invention discloses a high-robustness audio / video cross watermarking algorithm, which is characterized by decoding a video code stream, and generating a video watermark by utilizing inter-frame correlation of a video; decoding an audio code stream, and generating an audio watermark by utilizing low-pass amplitude statistic characteristics of the audio code stream; embedding the audio watermark into a video key frame through a visual salience model; and embedding the video watermark into a lower-frequency coefficient of the audio code stream through a superposition method. The high-robustness audio / video cross watermarking algorithm has the following beneficial effects that 1) the watermarks are generated by using the audio / video code stream characteristics and the watermarks are generated dynamically in real time in the carrier video decoding process, so that uncertainty of the embedded watermarks improves safety of the algorithm; and 2) the audio code stream and the video code stream are embedded with the watermarks respectively, so that even if one code stream is damaged and the watermark cannot be extracted, the watermark san still be extracted from the other code stream, the carrier video is protected more comprehensively and effectively, and watermarking robustness is improved greatly.

Description

technical field [0001] The invention relates to a video watermarking method, in particular to a highly robust audio-video cross-watermarking algorithm. Background technique [0002] The development of the Internet allows people to easily obtain various digital resources (audio, video, text, etc.), and digital watermarking, as a robust and invisible information hiding technology, can well protect the copyright of various multimedia digital resources. , maintain normal market order, and crack down on various bad behaviors such as illegal distribution and piracy. [0003] Digital watermarking technology is divided into two processes: embedding and extraction. In the embedding process, images and texts with copyright certification information are hidden in multimedia digital resources such as audio, text, and video through digital embedding methods, making them the original carrier data. Part; extraction is the reverse process of embedding, extracting the watermark from the car...

AI Technical Summary

Problems solved by technology

Most of the existing video watermarking algorithms only embed and extract the video code stream, and do not take advantage of the correlation between audio and video, or do not consider the existence of audio data at all.

Images