基于DMB的考场同步信息接收及显示终端设计  

Design of educational synchronization information receiving and display terminal based on DMB

作　　者：陈雪飞 张红升[1] 王国裕[1] Chen Xuefei;Zhang Hongsheng;Wang Guoyu(College of Electronic Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学光电工程学院,重庆400065

出　　处：《电子技术应用》2020年第8期126-128,共3页Application of Electronic Technique

基　　金：重庆市技术创新与应用发展项目(cstc2019jscx-msxmX0079)。

摘　　要：为了保证考场信息的精准发布,避免考场中因时间或指令不同步而导致的不公平现象,基于数字多媒体广播(Digital Multimedia Broadcasting,DMB)技术,设计了一款面向大型考试的同步信息接收终端。该终端基于FPGA和单片机设计,可接收DMB信号,驱动LED点阵屏实时显示时间和考场文本信息,并提供语音播报功能。可保证时间精准同步到秒,所有考场误差不超过0.5 s。所显示的考场指令具有同步性、一致性、准确性和醒目的特点,有效保证了各考场中时间和指令的同步实时发布。In order to ensure the accurate release of the test site information,avoid the unfairness caused by the time synchronization in the test room,a synchronization information receiving terminal for large-scale examinations is designed based on digital multimedia broadcasting technology.Based on FPGA and MCU design,the terminal can receive DMB signals and drive LED dot matrix screen to display time and test text information in real time,and provides voice broadcast function.The time can be accurately synchronized to the second,and all the test field errors are less than 0.5 s.The displayed test field instructions have the characteristics of synchronization,consistency,accuracy and eye-catching,which effectively guarantees the simultaneous release of time and instructions in each examination room.

关 键 词：数字多媒体广播 FPGA 单片机 LED点阵屏 信息发布 

分 类 号：TN87[电子电信—信息与通信工程]