A video content protection method and apparatus based on watermarks

A technology for video content and protection devices, applied in selective content distribution, image communication, electrical components, etc., can solve the problems of limited applicability of digital watermarking, and achieve the effect of high encryption and security

Inactive Publication Date: 2017-05-03
上海文广互动电视有限公司
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  • Abstract
  • Description
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Problems solved by technology

[0008] Aiming at the problem of limited applicability of digital watermark in the prior art, the object of the present invention is to provide a watermark-based video content protection method and device

Method used

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  • A video content protection method and apparatus based on watermarks
  • A video content protection method and apparatus based on watermarks

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] The invention discloses a watermark-based video content protection device and method thereof. The device of the invention mainly includes a watermark capacity and strength threshold calculation module, a watermark information generation module, a watermark information embedding module, a watermark preprocessing module, a watermark extraction module, and the like. The functions of the above-mentioned device and the method steps executed thereof will be described in detail below.

[0024] Watermark capacity and intensity threshold calculation module:

[0025] In order to ensure the invisibility of the video watermark, the capacity and strength of the watermark must be lower than a certain threshold; in order to improve the robustness of the video watermark, the capacity and strength of the watermark should be as large as ...

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Abstract

The invention discloses a video content protection method and apparatus based on watermarks. The apparatus comprises a watermark information generation module and a watermark information embedding module. The watermark information generation module generates binary images of a check identifier and a copyright identifier according to a watermark capacity threshold, performs Arnold transformation on the binary images, generates image bit strings and encrypts the image bit strings with private keys to generate watermark information. The watermark information embedding module decodes the video images to obtain a video stream, and embeds the watermark information of the appropriate intensity in key frame transform domain intermediate frequency coefficients. According to the video content protection method and apparatus based on the watermarks, digitalal watermarks of the video content can be relatively well realized, and the digit watermarks in the invention has a relatively high encryption degree and safety degree.

Description

technical field [0001] The present invention relates to a video watermarking device and method, more specifically, to a watermark-based video content protection method and device. Background technique [0002] Digital watermarking (Digital Watermarking) technology is to embed some identification information (ie digital watermark) directly into the digital carrier (including multimedia, documents, software, etc.) or indirectly represent (modify the structure of a specific area), without affecting the use of the original carrier The value is not easy to be detected and modified again, but it can be identified and identified by the producer. Through the information hidden in the carrier, the purpose of confirming content creators, buyers, transmitting secret information, or judging whether the carrier has been tampered with can be achieved. Digital watermarking is an effective way to protect information security, realize anti-counterfeiting traceability, and copyright protecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/8358
CPCH04N21/8358
Inventor 袁政许颖浩褚灵伟
Owner 上海文广互动电视有限公司
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