摘要
视频监控系统中,用户不仅要获取高清视频数据,还需要一种高效的存储机制来管理这些音视频数据,这对于以后录像的查找和回放是至关重要的.设计了一种存储机制,采用ARM9核心的32位RISC处理器GM8180芯片作为嵌入式存储系统的主处理器芯片,以SD卡作为音视频数据的存储媒介.介绍并分析了嵌入式多媒体存储系统SD卡接口驱动,实现了H.264音视频数据DMA方式的传输,缓解了CPU的工作压力,大大提高了存储的效率.最后,根据嵌入式系统实际运行的需要,设计了系统上层存储文件的管理功能.在底层封装的支持下,在存储设备中建立文件系统,并实现相应的存储管理策略,以达到高效方便的管理存储数据的目的.
In video monitoring system, users should not only get the HD video, but also need a good storage mechanism to manage these audio and video data. It is crucial for searching and replaying the audio and video. Here a storage mechanism is designed. It adopts GM8180, ARM9 core 32-bit RISC processor, as the main process chip in this embedded system, and applies the SD card as the storage media to store the audio and video. In this paper, the interface driver of SD card in embedded multimedia memory system is introduced and analyzed and the transmission of H. 263 audio and video data in the way of DMA mode is implemented. It will relieve the work pressure on the CPU and improve the efficiency of storage dramatically. Finally, according to the need of embedded system running, the upper storage file management function is designed. Under the support of bottom layer encapsulation, the file system can be established in the storage device and the storage management strategy can be implemented in order to achieve the purpose of efficient and convenient management of stored data.
出处
《浙江工业大学学报》
CAS
2012年第4期437-440,共4页
Journal of Zhejiang University of Technology
基金
浙江省科技厅重大项目(2008C11103-1)
