【作者】 白宗元；

【导师】 胡宝霞；

【作者基本信息】 哈尔滨理工大学 ， 计算机应用技术， 2008， 硕士

【摘要】 随着计算机、多媒体和数字通信技术的迅速发展,一方面使得视频技术得到了促进和推动,另一方面也使得不同数字显示设备之间的接口互联问题日益突出,然而在当今市场上对于数字互联问题的重视还不够,在两个不同的接口之间进行转换的设备还比较少见。本论文详细介绍了一种基于FPGA的视频转换接口的设计方案,这个接口主要功能是实现了对输入的NTSC制式的视频信号进行转换。接口电路使用ADV7181B芯片对视频信号进行解码处理,被解码的信号为ITU_R656标准8位数据信号。本系统使用FPGA作为开发平台,由I2C总线配置模块、解交织模块、缓存模块、色度空间转换模块和VGA时序转化模块组成。其中,缓存设计采用场内行插入法实现隔行扫描变换为逐行扫描,利用流水线技术对色度空间进行转换;在ADV7123芯片解码下,图像通过VGA控制模块在VGA显示器上得到显示。本论文中的主控制器采用Verilog HDL作为硬件描述语言,系统在Quartus II 6.0, Modelsim SE 6.0软件平台下开发,采用FPGA可编程芯片,让整个系统拥有了较大的灵活性,不仅提高了数字接口的转换速度,而且还可以很方便的利用芯片的可配置性来完成系统的在线升级维护,提升了系统的应用价值。更多还原

【Abstract】 With the rapid development of computer, multimedia and digital communication technology, on the one hand video technology is advanced and boosted, on the other attachment of interface appears many problem to be solved among different digital display equipment. But it was paid no enough attention to on the market, and it is seldom seen between different interfaces.A solution of embeded Video Conversion Interface based on FPGA was introduced detailed in this paper, which had the function of video conversion for format NTSC. The analog video signals were converted to the 8 bit standard digital video signals according with ITU_R656 by video A/D processor ADV7181B. The system used Altera Corporation’s FPGA as the development platform. It was composed of I2C configuration module, deinterlace module, image frame storing control module, color space conversion module and VGA timing configuration module. Among them, the cache design uses at the line insertion method for the realization of interlaced scanning transform progressive scanning. The color space conversion was used by pipeline technology, Digital video signals were sent to the image frame storages. After the color space conversion by FPGA, the system changed its schedule. The VGA controller module sent the video signals to the VGA, which made the video signals displayed by ADV7123.Verilog HDL has been adopted in the design of the main controller in the paper. The system was developed under the platforms of Quartus II 6.0 and Modelsim SE 6.0 software. It was implemented in FPGA and made it flexible. The system can not only boost digital interface conversion velocity but also fulfill system upgraded online conveniently by chip of allocation, raise system applied value.更多还原