Digital watermark realization method based on video

A technology of digital watermarking and realization method, applied in the direction of image communication, electrical components, etc., can solve the problem of unbalance, and achieve the effect of fast embedding speed and extraction speed of watermark, and low complexity

Active Publication Date: 2018-05-15
深圳市时代经纬科技有限公司
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Problems solved by technology

[0003] The present invention provides a video-based digital watermark implementation method to solve the technical defect that the above prior art cannot achieve a better balance between watermark robustness, video fidelity, and video watermark capacity.

Method used

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  • Digital watermark realization method based on video
  • Digital watermark realization method based on video
  • Digital watermark realization method based on video

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Embodiment 1

[0034] Such as figure 1 As shown, the watermark implementation method provided by the present invention specifically includes the following steps:

[0035] 1. Encrypted original digital watermark

[0036] The AES256 algorithm is used for encryption, which will not increase the data volume of the watermark information. Adopt CBC mode, do SHA-256 processing according to the original digital watermark, get 256b data, that is, 32 bytes of data, take the 7th byte to the 22nd byte, a total of 16 bytes, plus the original number The first 16 bytes of the watermark, a total of 32 bytes, are used as the AES encryption key, named AES key; the 16 bytes from the 5th byte to the 20th byte of the AES key are used as the AES initialization vector, The original digital watermark is grouped in units of 16 bytes, and those less than 16 bytes are replaced with 00 at the end, and the AES encryption CBC mode is used, and the original digital watermark is encrypted with the AES key and the AES ini...

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Abstract

According to a method provided by the invention, a watermark is embedded through discrete Fourier transform based on features such as video resolution and a code rate. The algorithm complexity is low.The watermark robustness, the video fidelity and the watermark capacity of a video are balanced. The watermark embedding speed and extraction speed are high.

Description

technical field [0001] The present invention relates to the field of digital watermark embedding, more specifically, to a video-based digital watermark implementation method. Background technique [0002] When the existing technology embeds the watermark in the video, it does not consider the video resolution, bit rate, etc., so that a good balance cannot be achieved between the robustness of the watermark, the fidelity of the video, and the watermark capacity of the video. Contents of the invention [0003] The present invention provides a video-based digital watermark implementation method to solve the technical defect that the prior art cannot achieve a better balance between watermark robustness, video fidelity, and video watermark capacity. [0004] For realizing above-mentioned purpose of the invention, the technical scheme that adopts is: [0005] A method for realizing digital watermarking based on video, comprising the following steps: [0006] S1. Use the AES25...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N1/32
CPCH04N1/32144H04N1/3216H04N1/32272H04N1/3232
Inventor 徐劲李阳春金涛米允洪
Owner 深圳市时代经纬科技有限公司
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