设计了一种基于嵌入式系统的全彩LED显示屏脱机播放系统,可支持高分辨率全彩LED显示屏的脱机播放.针对典型嵌入式系统在显示性能方面的瓶颈,提出了使用多媒体协处理器SM501增强显示性能的嵌入式系统方案,在软件上设计了SM501硬件加速底层显示接口以提高显示性能,并利用SM501提供的显示加速功能优化了视频播放.该系统较好地解决了目前国内LED显示屏脱机控制卡局限于支持单色或者伪彩LED,分辨率低、不能播放高质量视频的现状.
A novel design for full color LED screen off-line display system based on embedded system was proposed in this paper. The goal of this project is to develop a solution of tiny off-line display system which can support full color high definition LED screen. The multimedia coprocessor SM501 was adopted to solve the bottleneck of display system in a typical embedded architecture. Software interface of 2D graphic acceleration for SM501 was designed to speed up the display and optimize the video play. This project solved the limitations in current LED off-line control card,such as support only homochromy or pseudo color LED screen,support only low definition screen and does not support for high quality video display.
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