无人机视频数据的实时压缩处理是无人机的关键技术之一.本文以 DM368为核心处理器,以嵌入式 Linux 为板级操作系统,设计出一套可供无人机使用的低功耗视频实时压缩系统.与传统的嵌入式视频 H264软件编码压缩系统相比,本系统依赖 DM368内嵌的视频协处理硬核处理 H264编码,具有功耗低,处理延迟小,外部电路简单等诸多优势.同时系统以嵌入式 Linux 为板级操作系统,实时性强,可稳定高效的管理视频采集、硬核调度、串口通讯、数据输出等诸多任务.试验结果表明,本系统在处理 PAL 制式为视频源的 H264编码任务时,平均功耗仅为1.5 W,具有功耗低、成本低、体积小、重量轻、实时性强等诸多优势,能够满足无人机视频压缩的应用需求.%Real-time UAV video data compression is one of the key technology of UAV.In this paper we propose a real-time,low-power video encoding system design,based on DM368 processor and em-bedded Linux operating system.Compared with traditional embedded video H264 encoding system de-sign,we use DM368 inner video image co-processors to process the encoding task,which has the ad-vantage of low-power consumption,low processing delay,and simple external circuit design.Further-more,we utilize the real-time,stable and efficient embedded Linux operating system,capable of pro-cessing multi-task,such as video capturing,hard-core scheduling,serial communication,and data transmission.Experiment shows that the average power consumption of our system is only 1.5 W when dealing with the PAL video H264 coding task.Our design meet the requirement of UAV video compression task efficiently,with the advantage of low-power,low-cost,small-size,light-weight, and good real-time quality.
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