基于NiosⅡ的内窥镜视频和字符显示系统设计  

Design of Video and Characters Display for Endoscope System Based on NiosⅡ

作　　者：徐超[1] 李丕丁[1] 孙荣贵[1] 曾红雨 

机构地区：[1]上海理工大学医疗器械与食品学院,上海200093

出　　处：《电子科技》2017年第9期42-45,共4页Electronic Science and Technology

摘　　要：传统内窥镜大多基于计算机从而导致设备庞大、不易携带。为此,文中设计了一种脱离计算机的内窥镜视频显示系统,并基于该系统提出一种字符叠加方案。该系统是以FPGA为主控芯片,在FPGA芯片内部搭建NiosⅡ处理器,采用视频解码芯片、编码芯片及相关外设,实现了内窥镜硬件系统的构建。并对系统的视频数据处理流程、ITU656数据协议、图像字符叠加原理和相关程序设计思想进行了阐述。实验结果表明,该系统实现了内窥镜在串口控制下的字符和图像的叠加,具有电路结构简单、低成本、体积小、设计灵活等特点。Most traditional computer - based endoscopic devices are too large to take along. To solve this prob- lem, an endoscopic video display system is designed, and a character superposition scheme is proposed based on the system. The main control chip of the system is FPGA. The Nios II processor is built in FPGA . The video decoder chip, the encoding chip and related peripherals are used to construct the hardware system of the endoscope. The sys- tem video data processing flow, the ITU656 data protocol, the image character superposition principle and the related program design thought are expounded. Realizes the superposition of characters and images under the control of the serial port in the endoscope system. The experimental results show that the system can realize the superimposition of character and image under the control of the serial port in the endoscope ,which has the characteristics of simple circuit structure, low cost, small volume and flexible design.

关 键 词：NiosⅡ ITU656 字符叠加 UART 

分 类 号：TN911.73[电子电信—通信与信息系统] TP391.14[电子电信—信息与通信工程]