网络视频监控系统存储子系统软件设计
发布时间：2018-09-15 19:18
【摘要】：录像存储技术是网络视频监控系统的一项关键技术,是决定系统整体性能和规模大小的主要因素之一。传统的录像存储解决方案由于采用文件方式将录像数据集中存储于第三方存储设备,往往存在软硬件成本高、录像管理效率低下和录像存储性能不足等问题,成为系统发展的瓶颈。因此,发展视频存储技术、改进录像存储解决方案对推动视频监控行业的发展有着重要的意义。 本文设计研发了网络视频监控系统存储子系统软件。该软件运行于Linux平台,基于iSCSI协议、RAID技术、LVM技术和以太网技术,设计研发了一种专用于网络视频监控系统的存储区域网络以实现录像集中存储,降低了系统成本；采用多线程及网络编程技术,设计了一种包含存储资源划归、录像检索回放和录像信息实时更新等功能的高效精确的录像管理方案,提高了系统集成度；针对传统文件系统存储方案的存储效率低和检索性能差的缺陷,设计了一种基于裸磁盘设备的录像存储方案。方案根据监控系统的数据存储特点,设计了一种磁盘逻辑存储结构,其中采用B+树管理录像段索引信息,并设计了一种基于图像组(GOP)的数据缓存机制。相对于传统的文件系统存储方案,将监控系统的512Kbps和IMbps典型存储码率下的录像存储效率分别提高了43.6%和30.3%,录像检索耗时降至25～35ms之间。
[Abstract]:Video storage technology is a key technology of network video surveillance system, and it is one of the main factors to determine the overall performance and size of the system. Because the traditional video storage solution uses the file way to store the video data in the third party storage device, it often has the problems such as high cost of software and hardware, low efficiency of video recording management and insufficient performance of video storage, etc. Become the bottleneck of system development. Therefore, it is of great significance to develop video storage technology and improve video storage solutions to promote the development of video surveillance industry. This paper designs and develops the storage subsystem software of network video surveillance system. The software runs on Linux platform. Based on iSCSI protocol raid technology and Ethernet technology, a kind of storage area network is designed and developed for the network video surveillance system to realize the centralized storage of video recording, which reduces the cost of the system. By using multithreading and network programming technology, an efficient and accurate video management scheme is designed, which includes the functions of storage resource categorization, video retrieval and playback, and real-time updating of video information, which improves the system integration. A video storage scheme based on bare disk device is designed to overcome the shortcomings of low storage efficiency and poor retrieval performance of traditional file system storage schemes. According to the data storage characteristics of the monitoring system, a disk logical storage structure is designed, in which B-tree is used to manage the video segment index information, and a data cache mechanism based on image group (GOP) is designed. Compared with the traditional file system storage scheme, the video storage efficiency under the typical storage rate of 512Kbps and IMbps is increased by 43.6% and 30.3%, respectively, and the video retrieval time is reduced to 25~35ms.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN948.6;TP333
本文编号：2244236
[Abstract]:Video storage technology is a key technology of network video surveillance system, and it is one of the main factors to determine the overall performance and size of the system. Because the traditional video storage solution uses the file way to store the video data in the third party storage device, it often has the problems such as high cost of software and hardware, low efficiency of video recording management and insufficient performance of video storage, etc. Become the bottleneck of system development. Therefore, it is of great significance to develop video storage technology and improve video storage solutions to promote the development of video surveillance industry. This paper designs and develops the storage subsystem software of network video surveillance system. The software runs on Linux platform. Based on iSCSI protocol raid technology and Ethernet technology, a kind of storage area network is designed and developed for the network video surveillance system to realize the centralized storage of video recording, which reduces the cost of the system. By using multithreading and network programming technology, an efficient and accurate video management scheme is designed, which includes the functions of storage resource categorization, video retrieval and playback, and real-time updating of video information, which improves the system integration. A video storage scheme based on bare disk device is designed to overcome the shortcomings of low storage efficiency and poor retrieval performance of traditional file system storage schemes. According to the data storage characteristics of the monitoring system, a disk logical storage structure is designed, in which B-tree is used to manage the video segment index information, and a data cache mechanism based on image group (GOP) is designed. Compared with the traditional file system storage scheme, the video storage efficiency under the typical storage rate of 512Kbps and IMbps is increased by 43.6% and 30.3%, respectively, and the video retrieval time is reduced to 25~35ms.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TN948.6;TP333
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