Data Embedding in Scrambled Digital Video for Security
نویسندگان
چکیده
In broadcast service operators would like the viewing of such a sufficiently corrupted video on the screen of the unauthorized viewer to allure potential customers without sacrificing the level of robustness provided by digital encryption techniques.A technique for embedding data in scrambled AVI video is described. The embedding technique is applied to the video sequence jointly with the video scrambling algorithm. The scrambling operation together with the data embedding process are performed prior to AVI encoding, and the scrambled and data-embedded video is AVI encoded with a minimal increase in the AVI bit rate. The applied technique uses premanipulation of the block scrambling parameters to generate inter block differentials to embed the data bits. Embedded data has sufficient robustness to resist the AVI encoding attack. The data channel capability of the system arises due to the scrambling process and is not available when the video is not scrambled. The data embedding scrambler precedes input of any AVI compliant encoder.
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