基于Hi3515的水平四画面录像机录像功能的实现

简要介绍了海思Hi3515的硬件特性,着重阐述了该录像机录像功能的软件实现。介绍了录像机软件的总体结构;对音频编码、视频编码和AVI封装的实现原理和方法做了细致地分析研究,给出了相关流程图及水平四画面录像的实现方法;将程序放到开发板上进行了测试。测试结果表明,该录像机可以实现四画面的单独录像和组合录像,录像文件可以直接播放,录像质量和效果良好。可以长时间运行,运行稳定性较好,满足项目的要求。

Four Images in a Line Digital Video Recorder Based on Hi3515 Core Board

To meet the needs of a project, a digital video recorder（DVR） that has four images in a line is developed. After a brief overview of the hardware features of hi3515 processor is given, the software implementation of the DVR＇ s recording function is particularly described. First, the overall structure of the software is introduced, secondly the principles and meth- ods of audio/video encoding and AVI packing are analyzed, the related flow diagrams are provided, and an innovative way to achieve recording the four images in a line is introduced. Finally, the test of running the software on the development board is described. The results of experiment show that the DVR can record the four images in a line separately or compositely, the re- corded video files are high quality and can be played on PC directly. The DVR is stable and can be long time operated.