摘要
无人机在侦察、测绘等领域对图像分辨率的要求不断提高,随之带来了数据量的显著增大,其次,视频图像系统与传统遥控遥测系统的融合也是设计中需要考虑的。针对以上问题,设计并实现了一种基于FPGA+DSP的机载高清视频图像系统,包括机载设备端和地面站端两部分,最高支持分辨率为1280×720,每秒25帧的MPEG-4实时视频编解码,平均码速率在5Mbps以下。图像分辨率和视频码率可通过上行遥控指令动态切换。视频数据与遥测数据实现了组帧传输。设备体积小、功耗低、可靠性高,成功完成了挂飞实验。
The requirements of video image resolution is ever increasing in the UAV reconnaissance,mapping and other fields,which bring a significant amount of data increase.In addition,the integration of video imaging system and traditional telecontrol and telemetering system is required in system design consideration.To solve the problems above,we design and implement an airborne high definition video image system based on FPGA＋DSP,including two parts：airborne equipment end and ground station end,it supported the maximum resolution of 1 280×720,25 frames per second in MPEG-4 real-time video encoding and decoding with the average code rate below 5 Mbps.Image resolution and video code rate can be switched up by telecommand dynamically.The video data and telemetry data are transmitted in the same frame.The equipment with small size,low power consumption,high reliability,successfully completed flight experiments.
出处
《电子测量技术》
2011年第1期69-73,共5页
Electronic Measurement Technology
