Watermarking of Digital Video Stream for Source Authentication
In this paper, a novel idea of embedding a watermark pattern in
BT.656 raw digital video stream is proposed and implemented in
Field Programmable Gate Array (FPGA) hardware for real time
authentication. Earlier many watermarking algorithms are
proposed for video authentication both in compressed as well as
in uncompressed domain. A watermark is introduced in the
stream either at source, channel or at the receiver. Most of
methods targets embedding the watermark in the compressed
domain before being transmitted over the channel or at the play
back, very few techniques concentrates on the raw video data at
the source. In this proposed work, we embed the watermark
pattern at the very beginning stage of digital video production
i.e., at BT.656 video interface. A 64-bit length device DNA or
user defined payload is embedded as an invisible watermark.
Optionally visible logo is used as a visible watermark.
Embedding of watermark bits is done in Discrete Wavelet
Transform (DWT) domain for its robustness against various
attacks. Only the luminance component of the BT.656 video
stream is watermarked. An experimental result shows that the
proposed method is operating in real time while maintaining the
good perceptual visual quality measured in terms of PSNR.
Keywords: Real-Time Authentication, BT.656, FPGA,
Watermarking, Digital Video Streams. Discrete Wavelet
Transform
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