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A mobile terminal-oriented video watermarking method

A video watermarking and mobile terminal technology, applied in the field of information security, can solve problems such as the inability to guarantee the robustness of the algorithm, and achieve the effect of good robustness

Inactive Publication Date: 2018-07-24
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the differences in the resolutions of various mobile terminal devices, geometric attacks represented by video file resolution conversion will be particularly common. However, the existing DWT video watermarking algorithms only consider the performance of linear attacks, and cannot guarantee the performance of such algorithms in Robustness under mobile terminals

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  • A mobile terminal-oriented video watermarking method
  • A mobile terminal-oriented video watermarking method
  • A mobile terminal-oriented video watermarking method

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Embodiment Construction

[0039] Below in conjunction with specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various equivalent forms of the present invention All modifications fall within the scope defined by the appended claims of the present application.

[0040]Using DWT low-frequency coefficient histogram shape to attack invariance, on the basis of this characteristic, a video watermarking algorithm based on DWT low-frequency coefficient modulation is invented. Perform DWT coefficient histogram statistics on any continuous video frame, and use binary watermark as a seed to modulate the histogram shape of adjacent statistical intervals. The normalized correlation coefficient NC is used to measure the similarity between the extracted watermark image...

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Abstract

The invention discloses a mobile terminal-oriented video watermarking method, which selects the shape of the histogram of the DWT low-frequency coefficient of the brightness component of an H.264 video frame as a watermark embedding carrier, and realizes the purpose of video copyright protection under the mobile terminal. The method comprises the following steps: decoding the carrier video in H.264 format to obtain naked video frame data; adopting Haar wavelet to integrally transform the brightness component of the naked video frame to obtain a layer of wavelet transform low-frequency coefficients; obtaining the statistical interval of the histogram of low-frequency wavelet coefficients, and using a binary watermark Quantize the histogram statistical interval for the seed, and finally embed the watermark information. Sequentially decode the H.264 video to the bare frame data, obtain the low frequency coefficients of the whole wavelet transform of the brightness component of the bare frame, obtain the coefficient histogram by statistical coefficient value distribution, and obtain the watermark information according to the shape of the histogram. The invention effectively utilizes the shape invariance of the DWT low-frequency coefficient histogram, improves the anti-attack performance of the video watermark, combines the good time-frequency characteristics of the DWT coefficient, and effectively alleviates the contradiction between the invisibility and robustness of the watermark.

Description

technical field [0001] The invention relates to a mobile terminal-oriented video watermarking method, and relates to multimedia information copyright protection technology and the technical fields of information security. Background technique [0002] As an important branch of information hiding, digital watermarking technology is an effective means to realize copyright protection. With the rapid development of mobile terminal equipment, wireless network access technology and the rise of UGC mode, the increasingly frequent production and dissemination of video media has spawned many piracy and infringement activities. Therefore, how to use video watermarking technology to protect the legitimate rights and interests of copyright owners has a strong realistic basis, and balancing the contradiction between the invisibility and robustness of watermarking algorithms is still the ultimate goal of all watermarking algorithms. [0003] Compared with other media, video has a larger ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/63H04N19/467H04N21/4405
CPCH04N21/4405
Inventor 严勤施杰董峦
Owner HOHAI UNIV
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