Method and device for embedding watermarking information and method and device for authenticating watermarking information

Abstract

The embodiment of the invention relates to a method and a device for embedding watermarking information and a method and a device for authenticating the watermarking information. The method for embedding the watermarking information comprises the following steps: generating watermarking information to be embedded; acquiring a reference frame index of a current macro block in video data; and embedding the watermarking information into the reference frame index. The method and the device for embedding the watermarking information and the method and the device for authenticating the watermarking information can better utilize the watermarking information to protect and authenticate video content, are easy to realize, and have little influence on video quality.

Description

technical field [0001] The embodiment of the present invention relates to the field of multimedia technologies, and in particular to a watermark information embedding method and device, and a watermark information authentication method and device. Background technique [0002] With the continuous development of the Internet and video coding technology, digital video will not only gradually replace analog video as the main form of video storage and transmission, but also promote the emergence of more video-based applications (if not specified, video is digital video). With the continuous development of video applications, the authentication technology for video content has also developed rapidly. Among them, digital watermarking technology is a more effective method for video content protection and authentication, because video content is stored and transmitted in the form of encoding, so The video watermarking scheme should be closely combined with video coding standards. At...

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Problems solved by technology

[0007] However, for the first method, embedding watermark information by modifying the motion vector is a classic video watermark embedding method, although it has been widely used in the MPEG-2 and MPEG-4 standards based on the Moving Picture Experts Group (MPEG) series of standards In the watermark authentication scheme, but in the multi-reference frame scheme introduced for the first time in the H.264 / AVC standard, the motion vector must be combined with the reference frame index (Reference FrameIndex) to correctly indicate the position of the prediction block, so it is similar to the MPEG-2 scheme For the second scheme, since the number of skipped macroblocks in the H.264 video stream is usually small, the information load of embedding the watermark in a single frame is relatively small. will be relatively low, and for macroblocks without embedded watermarks, there must be additional methods to authenticate their content, which increases the complexity of the scheme

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