High-robustness audio/video cross watermarking algorithm

A highly robust, video watermarking technology, applied in digital video signal modification, speech analysis, selective content distribution, etc., can solve the problem of not using audio-video correlation, not considering audio data, etc.

Inactive Publication Date: 2017-06-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • High-robustness audio/video cross watermarking algorithm
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  • High-robustness audio/video cross watermarking algorithm

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Embodiment Construction

[0069] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0070] The invention embeds the watermark generated by audio features into the video code stream, and the watermark generated by video features is embedded into the audio code stream. Both the audio and video code streams are protected. The watermark is extracted from a code stream to complete the demonstration.

[0071] When the present invention is actually implemented, the peak signal-to-noise ratio PSNR is used to measure the impossibility of the watermark for the video signal embedded in the audio watermark, and the robustness of the watermark is measured by the bit error rate BER; for the audio signal embedded in the video watermark, the SNR SNR is used to measure the imperceptibility of ...

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PUM

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/8358H04N19/467G10L19/018
CPCG10L19/018H04N19/467H04N21/8358
Inventor 严勤潘阳续常红霞
Owner HOHAI UNIV
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