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Method and device for embedding watermark on digital media

A technology of watermark embedding and digital media, applied in image data processing, image data processing, instruments, etc., can solve the problems of illegal dissemination and distribution of information

Inactive Publication Date: 2016-04-27
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The most common problem is that the original video information will be illegally distributed to unauthorized users, that is, the illegal dissemination of information

Method used

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  • Method and device for embedding watermark on digital media
  • Method and device for embedding watermark on digital media
  • Method and device for embedding watermark on digital media

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Embodiment Construction

[0052] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0053] refer to figure 1 As shown, it is a schematic flowchart of a watermark embedding method on digital media according to an embodiment of the present invention. The described watermark embedding method on digital media comprises the following steps:

[0054] Step 101, divide the digital image or video into blocks, and perform two-dimensional DCT transformation on each image block or video block. Its specific implementation process is as follows:

[0055] The original image or video I with a size of M*N is divided into image blocks or video blocks with a size of P*P, and then two-dimensional DCT is performed on each image block or video block. Preferably, the values ​​of M and N are both integers greater than or equ...

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Abstract

The invention discloses a method and device for watermark embedding in digital media. The method includes the steps that digital images or videos are partitioned, and two-dimensional DCT conversion is carried out on each image block or each video block to obtain DCT coefficient matrixes respectively corresponding to the image blocks or the video blocks; watermark signals to be embedded are generated according to watermark information needing to be embedded; the watermark signals are embedded into the coefficient matrixes respectively; two-dimensional DCT inverse transformation is carried out on each coefficient matrix after embedment to obtain image blocks or video blocks after embedment, and all the image blocks or the video blocks after embedment after embedment form images or videos after embedment. Therefore, the method and device for watermark embedding in the digital media can effectively protect the digital media.

Description

technical field [0001] The invention relates to the field of multimedia signal processing, in particular to a method and device for embedding watermarks on digital media. Background technique [0002] As the acquisition, representation, storage and dissemination of multimedia information become increasingly digital, the application of digital video technology has been greatly developed. Although digital video has its obvious advances, it has caused many new problems because it allows video information to be copied and disseminated more quickly. The most common problem is that the original video information will be illegally distributed to unauthorized users, that is, illegal dissemination of information. As a new method to prevent illegal dissemination of information, digital watermarking technology has been increasingly used in the field of copyright protection recently. The demand side of copyright protection can embed copyright identification information into the video ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06F21/10
Inventor 程明智杜艳平齐英群张勇斌陈红斌
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION