为了满足机载显示器对综合视频图形处理技术的需求, 提出了一种基于SoC嵌入式处理平台的机载视频图形融合显示与视频记录系统实现方法。该方法以SoC为核心搭建硬件平台, 使用SoC内部集成ARM处理器和视频图形协处理单元执行图形生成算法与外视频采集, 配合SoC片上高速存储和显示接口, 采用双缓存与多线程并发机制实现视频图形融合显示和外视频实时记录。本方法支持多种格式分辨率的视频源采集和大分辨率图形同步生成。实验结果表明, 采用该系统技术后机载显示器采集1 024×768分辨率外视频同时生成1 920×1 080分辨率图形时, 融合处理后帧率可达45 fps, 能够满足机载显示器实时显示需求。

In order to satisfy the demand for integrated video and graphics processing technique in a cockpit display system, a method about airborne video graphics fusion display and video recording system based on SoC is proposed in this paper. Hardware platform is designed based on SoC. The graphics generation algorithms and video acquisition are performed by ARM processor and video graphics assist processor integrated in SoC. A double buffer and multi thread concurrent mechanism is designed to realize video graphics fusion display and real-time recording of video in cooperation with high speed storage and display interface integrated in SoC. Multiple formats resolution video source acquisition and large resolution graphics generation are supported by the proposed method. Experiments show that when capturing with 1 024×768 resolution video and generating with 1 920×1 080 resolution graphics, the fame rate is 45 fps, which satisfies the requirements of the cockpit display system.