Spread Spectrum Image Watermarking with Digital

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					      Spread Spectrum Image Watermarking with Digital
                                  Design

Abstract:
      The watermarking technique is a potential solution for copyright
protection, authentication and integrity verification of digital media. Among
the widely used watermarking techniques, spread spectrum modulation
based method becomes appealing due to its inherent advantage of greater
robustness and is used widely for various applications. Some watermarking
applications are digital television broadcasting, internet protocol television
essentially demand development of low cost watermark algorithms in order
to implement in real-time environment. This paper proposes a block based
multiple bit spatial domain spread spectrum image watermarking scheme
where a gray scale watermark image is can be represented by less number of
binary digits using novel channel coding and spatial bi-phase modulation
principle. VLSI implementation using Field Programmable Gate Array has
been developed for the algorithm and circuit can be integrated into the
existing digital still camera framework. The proposed image watermarking
algorithm may be applied for authentication as well as secured
communication in real time environment.
      Block Diagram:




           Channel Coding



                                  Water Marking              FPGA



          Spread Spectrum
            modulatiom




Existing system:
         Image watermarking system with large number of information bits.
Existing system disadvantage:
          Less secured and less robust


Proposed system:
     Spread spectrum image watermarking scheme where a gray scale
watermark image is represented by less number of binary digits using novel
channel coding spatial bi-phase modulation principle.          Proposed mage
watermarking algorithm may be applied for authentication as well as secured
communication in real time environment.
Proposed system advantage:
       Among the widely used watermarking techniques spread spectrum
modulation based method become appealing due to inherent advantage of
greater robustness and it’s used for various applications.
Software Requirements:
           Modelsim 6.0
            Xilinx 9.1i
Hardware requirement:
           Xilinx Spartan 3 FPGA


Introduction about the Software:

           ModelSim and xilinx offers a native environment with support
for multiple languages including VHDL, Verilog, SystemC, and
SystemVerilog. The integrated verification and debug environment finds
more bugs faster and enhances performance with the mixed-HDL flow.

Introduction about the domain:
Imaging and video applications are one of the fastest growing sectors of the
market today. Typical application areas include e.g. medical imaging,
HDTV, digital cameras, set-top boxes, machine vision and security
surveillance. As the evolution in these applications progresses, the demands
for technology innovations tend to grow rapidly over the years. Driven by
the consumer electronics market, new emerging standards along with
increasing requirements on system performance imposes great challenges on
today’s imaging and video product development. To meet with the
constantly improved system performance measured in, e.g., resolution,
throughput, robustness, power consumption and digital convergence (where
a wide range of terminal devices must process multimedia data streams
including video, audio, GPS, cellular, etc.), new design methodologies and
hardware accelerator architectures are constantly called for in the hardware
implementation of such systems with real-time processing power.

				
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posted:8/7/2012
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