嵌入式技术在视频矩阵切换系统中的应用研究  

Application of Embedded Technology in Video Matrix Switching System

作　　者：张来胜 ZHANG Lai-sheng(Zhengzhou Human Resources and Social Security Data Management Center,Zhengzhou Henan 450000)

机构地区：[1]郑州市人力资源和社会保障数据管理中心,河南郑州450000

出　　处：《数字技术与应用》2021年第6期163-166,共4页Digital Technology & Application

摘　　要：为了满足多通道视频快速切换的需要,设计了一种基于嵌入式技术的多通道HDMI视频快速切换矩阵的软件和硬件系统。该系统的下位机部分由微控制器(MCU)模块、TMDS切换模块、HDMI接口模块三部分组成,编写切换控制程序和底层驱动程序。上位机软件通过串口或TCP/IP发送指令到下位机,实时操作系统多线程接收并解析指令,MCU通过IIC总线控制切换芯片做出相应操作。实验测试表明,与国内同类系统相比,具有多通道HDMI视频切换速度快、延迟小、无失真特点,可用于高清视频监控场合。In order to meet the needs of multi-channel video fast switching,designs a software and hardware system of multi-channel HDMI video fast switching matrix based on embedded technology.The lower part of the system is composed of MCU module,TMDs switching module and HDMI interface module.The switching control program and the underlying driver are written.The upper computer software sends instructions to the lower computer through the serial port or TCP/IP,the real-time operating system receives and analyzes the instructions through multi threads,MCU controls the switching chip through IIC bus to do the corresponding operation.The experimental results show that compared with the domestic similar system,the system has the characteristics of fast multi-channel HDMI video switching speed,small delay and no distortion,and can be used in high-definition video monitoring occasions.

关 键 词：视频矩阵 高清晰度多媒体接口 嵌入式系统 最小差分信号 

分 类 号：TN919.81[电子电信—通信与信息系统]