无人机图像压缩与实时传输系统设计

摘要

To satisfy requirements of code rate, compression ratio, complexity, resolution ratio, instantaneity of image transmission and input during aerial photographing, this thesis works on designing an effective system of unmanned aerial vehicles image compression and real time transfer which is based on the FPGA, two slices of ADV212 and two slices of SDRAM. In this system, original data of images will be transferred into cache, and then transferred into two slices of high-speed compressing chips, ADV212. Two slices of compressing chips will compress data simultaneously, which will enhances compressing and transmission speed. Experimental results show, two slices of SDRAM will be the data-caching mechanism of system, which will guarantee the reliability during transmitting procedure. With favorable maneuverability and application value, this design guarantees the high quality of images during real-time transfer.%为满足无人机航拍图像传输对输入码率、压缩率、复杂程度、分辨率大小、数据传输实时性等诸多方面的要求，此设计致力于研究一套基于FPGA+两片ADV212+两片SDRAM为架构的高性能无人机图像压缩与实时传输系统。系统采集图像的原始数据通过FPGA控制进入缓存，之后再由FPGA控制分别进入两片高速压缩芯片ADV212。两片ADV212同时进行压缩工作，可以极大提高数据的压缩与传输速率。同时，两片SDRAM作为系统的数据缓存，数据传输过程中的可靠性也可以得到保证。实验结果表明，此系统确保了图像实时传输的高质量，具有良好的工程可操作性和应用价值。