H.264 standard motion vector-based method for embedding and extracting fragile watermark

A standard motion, watermark embedding technology, applied in the field of information security, can solve the problems of video visual effects, watermark concealment and anti-attack defects.

Inactive Publication Date: 2011-06-08
SHANGHAI JIAO TONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] After searching the existing technology, it is found that the Chinese Patent Document No. CN101854546, published on 2010-10-06, records "a video watermark embedding and extraction method based on H.264 motion vector", and the embedding position selected by this technology is P The motion vector of the frame, and the P frame number embedded in the watermark is determined by the pseudo-random sequence generated by the key, but the error accumulation of the P frame will affect the visual effect of the video to a certain extent
Chinese Patent Document No. CN101860744, published on 2010-10-13, describes a "real-time digital video wa...

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  • H.264 standard motion vector-based method for embedding and extracting fragile watermark
  • H.264 standard motion vector-based method for embedding and extracting fragile watermark
  • H.264 standard motion vector-based method for embedding and extracting fragile watermark

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Embodiment Construction

[0035]The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0036] Such as figure 1 As shown, the specific steps of embedding hidden information process are as follows:

[0037] The first step is to read the H.264 encoded video file to be embedded, and extract the frame number sequence of the video frame that will be embedded with the watermark {P 1 , P 2 ,...,P n}, n is the total number of video frames containing the watermark.

[0038] The subsequent video frame that will embed the watermark refers to the previous P frame of each key frame, that is, in a group of pictures (GOP, starting from an I frame, until but not including a series of frames of the next I frame) o...

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Abstract

The invention discloses an H.264 standard motion vector-based method for embedding and extracting a fragile watermark, which belongs to the technical field of information security. Watermark information is selectively embedded into the motion vector of a frame P in front of a frame I, so that watermark capacity and fidelity are high; the watermark information comprises a frame number and a time stamp, and is encrypted with a symmetric cryptographic algorithm, so that the watermark information has attack resistance and video tampering can be positioned at a certain accuracy; and an implementation process is performed in a compressed domain, computation complexity is low and the influence on a video coding bit rate is low.

Description

technical field [0001] The invention relates to a method in the technical field of information security, in particular to a method for embedding and extracting a fragile watermark based on the H.264 / AVC digital video codec standard motion vector. Background technique [0002] With the rapid development of computer communication technology, the popularization of Internet applications, and the digitization of information media, the release, dissemination, and exchange of digital images, music, and video works on the Internet are becoming more and more common. However, the characteristics of digital multimedia products that are easy to be copied and distributed without damage make it common to spread multimedia products in batches quickly and freely through the network. Digital watermark technology, as one of the technical means to effectively solve the digital copyright protection of information, has become a research hotspot in the field of information processing and informat...

Claims

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Application Information

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IPC IPC(8): H04N7/26H04N7/50H04N21/8358H04N21/8547H04N19/467
Inventor 孙锬锋蒋兴浩王琬程东阳徐澜李良祯顾昕彪
Owner SHANGHAI JIAO TONG UNIV
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