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Piracy tracing watermarking method applicable to streaming media environment

A streaming media and watermarking technology, applied in TV, electrical components, digital video signal modification, etc., can solve the problems of not being able to directly use H.264 streaming media video, not being able to select the embedding position of the watermark, not applicable to the network transmission environment, etc., to achieve Watermark embedding is efficient, invisible, and real-time

Active Publication Date: 2012-01-04
JIANGSU YITONG HIGH TECH
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Problems solved by technology

[0012] The present invention proposes a piracy tracking watermark method applicable to the streaming media environment, which solves the problem that the traditional H.264 video digital watermark cannot adapt to the network because the watermark embedding time is too long, and the watermark embedding position cannot be adaptively selected according to the video content. Due to the transmission environment and other reasons, it cannot be directly used for H.264 streaming video

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  • Piracy tracing watermarking method applicable to streaming media environment
  • Piracy tracing watermarking method applicable to streaming media environment
  • Piracy tracing watermarking method applicable to streaming media environment

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specific Embodiment approach

[0065] Then its specific implementation method is:

[0066] 1. First, preprocess the user information. The details are as follows:

[0067] Step 1: In key Y 1 Under the control of , scramble the identity ID of user Bob to obtain ID′.

[0068] The specific scrambling method is as follows: Let array A be used to store M-bit ID', array B is a temporary array for storing intermediate results, the length of both array A and array B is M, and the value of M is 32. Select the smallest positive integer P that is a prime number with M, and do the following scrambling: 1)B( i ) =A( ( i × P) mod M) i =0, 1 , 2 ,..., M-1

[0069] 2) A=B

[0070] Repeat the above two steps Y 1 times, the ID' can be obtained.

[0071] Step 2: Finally, spread the ID' into 64-bit binary bit information W. The binary bit information W is used as the watermark finally embedded in the video.

[0072] The specific spread spectrum method is as follows: First, use the formula ID'(j)=(-1) to ID' ID ' (j) ...

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Abstract

The invention relates to a piracy tracing watermarking method applicable to streaming media environment, and belongs to the multimedia information safety field. The method comprises the following steps: firstly segmenting video before the watermark embedding procedure; according to content of streaming video, selecting macroblocks meeting the conditions to be embedded with watermarks during the watermark embedding process; and determining the macroblock which is best suited for being embedding with watermark information by adopting a quicksort algorithm. In the piracy tracing watermarking method, based on difference between horizontal direction and vertical direction of motion vector of the macroblock, appropriate motion components are adaptively selected to be embedded with 2-bit watermark information, and the NAL (network abstraction layer) head of a B-frame is modified after the watermark embedding procedure so that the watermark can cope with the situations such as frame loss and the like resulting from network transmission. By adopting the piracy tracing watermarking method, the watermark information can be embedded into the streaming video in real time so as to achieve the purpose of piracy tracing.

Description

technical field [0001] The invention relates to a piracy tracking watermarking method suitable for a streaming media environment, and belongs to the field of multimedia information security. Background technique [0002] The integration of three networks means that the three major networks of telecommunication network, computer network and cable TV network undergo technical transformation, and carry various comprehensive multimedia services including voice, data and images through the IP network. Interpenetrate and cross. Streaming media refers to a media format that is played on the Internet in a streaming manner. The basic information of the IPTV service based on the IP network is transmitted in a real-time streaming manner. After the video provider compresses the video file, it puts it on the network server for segmented transmission, and the client computer can watch and watch it in real time without downloading the entire video file to the local. The IPTV service und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N21/8358H04N7/26H04N19/176H04N19/467H04N19/513
Inventor 程春玲张登银万腾马晓东陈小星
Owner JIANGSU YITONG HIGH TECH
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