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Multimedia SecurityDigital Video Watermarking

Bhasker n

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Outline

Motivation

Research objective

Background Literature Review

New Video Watermarking Algorithm

Future Direction Conclusion

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Why need Multimedia Security?

Easier to transfer multimediadocuments across the Internet

Copyright protection of content Multimedia Security and Multimedia

Copyright Protection

Encryption and control access Digital Watermarking

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Cryptography ensures confidentiality,authenticity, and integrity

Cannot help after decryption

Digital Watermarking can help Prove ownership

Identify a misappropriating person

Trace the marked documents

dissemination through the network

Why need Digital Watermark?

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Research objective

Survey and investigation on multimediasecurity issues and multimediawatermarking scheme.

Compared and evaluate variouswatermarking scheme

A new approaches and procedures formultimedia security based on watermarkingare proposed.

Experiment will be done on this proposedapproach

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Digital Watermarking

Watermarking is a concept ofembedding a special pattern,watermark, is embedded into adocument

Watermarking is a key process in theprotection of copyright ownership of

electronic data

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Digital watermarking

Watermarking

Algorithm

Watermarked

Image

Stego-Image I

WatermarkW

Secret / public key K

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Properties of Watermark

Invisibly

Capacity (Number of bits can be hidden)

Low error probability

Robustness Image watermarking ( filtering, resizing,

contrast enhancement, cropping, rotation... )

Video watermarking ( frame averaging, framedropping, frame swapping, statistical analysis,interpolation... )

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Application of Watermarking

Owner Identification

Proof of Ownership

Transaction Tracking

Content Authentication

Broadcast Monitoring

Copy Control

Device Control Automatic monitoring of copyrighted

material on the Web

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Video Watermarking

Raw video watermarking DFT

DCT

DWT

Video object watermarking (Mpeg-4)

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New Algorithm

DWT-based VideoWatermarking Scheme with

Watermark

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Discrete Wavelet Transform

Normalized to 256 X 256 pixel size

Perform DWT for each frame

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CONT..

Implement and use do experiment on thescheme

Identifiable from very short segment of

video. Individual frames extracted from thevideo will also contain the copyrightinformation

Make use of the object information

(information from Mpeg-4)

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Conclusion

Video Watermarking is need due toCopyright protection is essential

DWT-based Video Watermarking Scheme

with Scramble Watermark

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