| 马家麟,孙海洲,任贵珊,王素珍,邹开元,王怀铭.高集成度多种格式并行输出的视频测试信号源研制[J].电子测量与仪器学报,2022,36(3):217-223 |
| 高集成度多种格式并行输出的视频测试信号源研制 |
| Implementation of the high-integration video signal-source withthe multi-format and parallel-output function |
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| DOI： |
| 中文关键词: 图像分辨率 超高清/ 高清视频信号 视频信号接口 FPGA TMDS 信号 |
| 英文关键词:image resolution ultra / high-definition video signals video signal Interface FPGA TMDS signal |
| 基金项目:山东省自然科学基金（ZR2020MF003）、山东校企联合基金（RH1900012993）项目资助 |
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| 摘要点击次数: 787 |
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| 中文摘要: |
| 在大规模自动化生产过程中,为了对不同型号的电视机主板进行测试,需要一种能同时输出不同格式、多种接口、多种
分辨率的视频测试信号源。 通过对多媒体视频传输原理及不同格式视频接口信号的研究,在一片先进的 Artix-7 系大规模可编
程 XC7A100T 芯片上,实现了超高清、高清的数字视频 HDMI 接口信号和模拟标清视频 VGA、CVBS、YPRPB 格式的信号同时输
出。 首先,根据视频显示的基本原理,产生对应不同分辨率、不同场频的并行数字视频基带信号。 然后,将并行的超高清、高清
分辨率的数字视频信号进行并串转化,成为串行的 TMDS 信号,送到 HDMI 接口显示;将并行标清分辨率的信号送入调制模块
及数模转换转器成为 CVBS、VGA、YPRPB 格式的模拟视频信号。 在一片 XC7A100T 芯片内将并行的超高清、高清数字信号转
换成串行差分 TMDS 信号,节省了视频信号的并串转换处理芯片,节约了成本。 整个系统提高了产生视频测试信号的集成度,
减小了测试装备的体积,方便生产视频设备的厂家进行测试。 |
| 英文摘要: |
| In the large-scale automatic production process, in order to test different types of TV motherboards, it is very necessary that
video test sources can output different formats, multi-interfaces and multi-resolution in parallel. Through the exploration of multimedia
video transmission principle and video signal interface formats, the video test signal source is designed and realized in an advanced
Artix-7 series large-scale programmable XC7A100T chip, which can output both ultra-high-definition and high-definition video HDMI
interface signal, and analog standard definition video signal in VGA, CVBS and YPRPB format. First of all, parallel digital baseband
video signals with different resolutions and field frequencies are generated according to the principle of video display. Then, the parallel
ultra-high-definition and high-definition digital video signals are converted into serial TMDS signals in order to be sent to the HDMI
interface for display; and the parallel standard resolution signal is sent to the modulation module and digital-to-analog converter to
become analog video signal in VGA, CVBS and YPRPB format. In particular, the parallel ultra-high-definition and high-definition
digital video signals are converted into serial TMDS differential signal inside the XC7A100T chip, which saves the video parallel-serial
processing chips and reduces the cost of equipment. The whole system improves the integration level of video test signal, reduces the
volume of test equipment, and the manufacturers of video equipment can be more convenient to test. |
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