Based The Sopc Video Noise Reduction System Research And Design

As the rapid development of computer and communication,Multimedia technology is mature, and the video processing system in which is the most widely used.The video image in the collection and transfer process is often to be noisied,Therefore, how to reduce video noise is an important researching direction in the video processing system.By studying now existing video processing model and noise reduction algorithm,finally determine the optimal denoising scheme of this article,supported by FPGA and SOPC technology,selecting the popular of wavelet filter to implement the popular video denoising.Paper first describes the development status of video noise reduction system at home and abroad,then introduces the FPGA technology, SOPC technology and basic knowledge related videos.It focuses on the wavelet theory and the principles of denoising,building the mathematical model of video image signal and noise signal,analyzing the factors that influence the effect of wavelet denoising. According to requirements of the subject,make the overall design and detailed design for the system, it basically complets the wavelet filters, color space conversion, and VGA controller module in the design.Using SOPC Builder to create and integrate the system,achieve the software development on the corresponding hardware platform.Finally, by debugging and simulating the system, the experimental results can be obtained,the picture which denoised by the wavelet filtered should be clear.Calculate the noise ratio and the root mean square error of the original video signal and the denoised video signal by writing applications.After comparison,it can be seen that the denoised video signal's noise ratio is large, the root mean square error is small.it proves that the system has some video noise reduction.