【作者】 易湖；

【导师】 王耘波；

【作者基本信息】 华中科技大学 ， 微电子学与固体电子学， 2006， 硕士

【摘要】 数字视频处理是面向数字电视业务的多样性而产生的数字处理技术。随着数字电视产业以及视频技术的蓬勃发展,目前在视频领域内,出现了数字标清电视,高清电视,计算机视频等多种视频格式在内的大量格式标准。如何通过数字处理方法在多种视频格式之间进行相互转换是数字图像处理领域的研究重点。同时,通过各种数字视频处理技术提高视觉观赏效果也是各种图像处理芯片的研究内容。本文介绍了基于Xilinx公司Spartan3系列FPGA芯片XC3S400的视频处理系统实现过程。这个过程是芯片设计的重要步骤,起到验证处理算法效果和验证系统硬件方案可行性的作用。本文在对数字视频处理中各种视频格式转换算法进行了深入研究的基础上,提出了适合FPGA实现的图像格式转换算法,包括分辨率转换算法和帧率提升算法两方面。在视频格式转换算法方面,论文提出了一种适于FPGA实现的任意分辨率转换算法,该算法在实现数字图像处理功能的同时,复杂度低,易于硬件实现;在帧率提升算法方面,提出了一种50Hz-75Hz的帧率提升算法,充分利用了原始图像的信息,减少了计算造成的负面效果。同时,本文还讨论了使用FPGA实现色度空间转换的方法。探讨了色度空间的原理和转换算法,以及转换算法的FPGA硬件实现。本论文中所有算法和结构都己经在Xilinx Spartan3系列的FPGA平台上进行了验证,均通过了综合和功能仿真,大部分模块已经运用于实际工程当中。更多还原

【Abstract】 Digital video processing is a kind of digital signal processing technology faced to diversity of digital television formats. With the developments of digital television industry and digital video technology, a lot of video formats coexist in HDTV, SDTV and video formats of computer in current video field. The ability to convert formats from one type to another become indispensable in modern high end TV set. Hence, how to enhance the video quality through the digital process technology is the main task in the researches of image processing chip.The realization procedure of the video processing system based on the FPGA XC3s400 of Xilinx Co. is introduced in this paper. The procedure is the important step for the further integrate circuit design, which verify the system functionality and effect as well.By thoroughly study of the currently algorithms for video format conversions in the digital video field, an alternative method of image scaling appropriate for FPGA implementation is proposed. There are two main aspects included, the algorithm of display resolution conversion and secondly frame frequency up-conversion. On the video format conversion algorithms, an algorithm for unlimited display resolution conversion is discussed and performed. This algorithm has the merits such as lower computational complexity, and relative simply hardware architecture etc. On the other hand, a 50Hz-75Hz frame frequency up-conversion algorithm is carried out. The proposed algorithm takes advantage of original information as well as decreases the defects attribute to computing.The color space conversion method has also been investigated as well. The theories and conversion algorithms of color space are summarized, and the FPGA hardware implementation of conversion algorithm is carried out.All the algorithms and architectures discussed in this dissertation have been verified on the Xilinx FPGA platform, and then have been simulated and synthesized successfully. Some of the modules have been run in the practical project.更多还原