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 embedded Linux operating system. Compared with traditional embedded video H264 encoding system design, we use DM368 inner video image co-processors to process the encoding task, which has the advantage of low-power consumption, low processing delay, and simple external circuit design. Furthermore, we utilize the real-time, stable and efficient embedded Linux operating system, capable of processing 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.