FPGA implementation of a composite video signal to VGA signal converter
Keywords:
FPGA, format 4:2:2, format 4:4:4, ITU-R BT.601, YCbCr space color, RGB space color, VHDL, video signalAbstract
This paper describes the design and implementation of a system for converting composite video signal to VGA signal, which performs the capture and display of video based on the ITU-R BT.601 standard for digital television monitors. The system has three main components: an analog sensor that delivers the composite digital video signal, a graphics card that converts analog video to digital in 4:2:2 sampling format and uses the color space YCbCr and finally a FPGA (NEXIS card 2 , with the integrated circuit 3s1200efg320 -5) where the design has been implemented for processing the video signal to be displayed on a monitor. In the FPGA have been developed 4:2:2 to 4:4:4 sampling conversion modules and the conversion module between YCbCr color space to RGB (color format used in display devices). The synthesis of the FPGA design has been made using the XST (Xilinx Synthesis Tool) that is part of the interface development ISE Project Navigator 13.3 of the Xilinx® company. The equations for the transformation between color spaces have been implemented and simulated in MATLAB ® for validation of results.
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References
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