高速视频存储技术研究

发布时间：2018-05-26 09:31

本文选题：视频存储器 + DDR3-SDRAM　；参考：《中北大学》2015年硕士论文

【摘要】：高速视频存储技术凭借着其存储容量大、速度高、实时显示等特点，已经被广泛地应用到空中监测、水下视频采集以及陆地上的安防、交通、工业、教学等各个领域。目前普遍应用的视频存储器的存储速度比较低，存储容量小，并且带宽利用率低，所以需要设计一款存储速度高以及带宽利用率高的高帧频视频存储器。本文以高速视频存储器应用在水下视频数据采集作为应用背景，利用高性能的存储介质DDR3-SDRAM作为高速视频存储器的核心存储部分，不但提高了视频数据的存储速度，而且还增加了视频数据存储的带宽利用率，解决了一般视频存储器容易遇到的因存储速度不够而造成视频播放不连续的问题，除此之外该视频存储器还具有应用广泛和移植灵活等特点，能够满足不同场合的视频数据存储需求。本文在对高速视频存储器的发展及应用背景进行深入了解的前提下，对DDR3-SDRAM与一般的存储器进行了结构和性能的比较，并且在对需要采集的视频数据的指标进行分析的基础下，最终确定了基于DDR3-SDRAM的高速视频存储器的设计方案。基于该方案的提出，重点研究了DDR3-SDRAM控制器的设计方法，介绍了CMOS相机经过Camera Link接口输出的数据格式，对该存储器的各模块的硬件电路进行了设计，最终搭建了基于DDR3-SDRAM高速视频存储器的硬件测试平台。分别利用软件测试和硬件监测的方法对信号进行了验证，结果表明通过合理的设计可以提高DDR3-SDRAM的带宽利用率，采集的视频数据能够不丢帧的通过高速视频存储器的存储，，最终在上位机上进行实时的显示。
[Abstract]:High-speed video storage technology has been widely used in air monitoring underwater video acquisition and land security transportation industry teaching and other fields because of its large storage capacity high speed real-time display and so on. At present, the widely used video memory has low storage speed, small storage capacity and low bandwidth utilization, so it is necessary to design a high frame rate video memory with high storage speed and high bandwidth utilization. In this paper, the application of high-speed video memory in underwater video data acquisition as the application background, the use of high-performance storage medium DDR3-SDRAM as the core storage part of high-speed video memory, not only improve the storage speed of video data. Moreover, the bandwidth utilization ratio of video data storage is increased, and the problem of video playing discontinuity caused by insufficient storage speed is solved. In addition, the video memory has the characteristics of wide application and flexible transplantation, which can meet the needs of video data storage in different situations. On the premise of deeply understanding the development and application background of high speed video memory, this paper compares the structure and performance of DDR3-SDRAM with that of general memory, and analyzes the indexes of video data that need to be collected. Finally, the design scheme of high speed video memory based on DDR3-SDRAM is determined. Based on this scheme, the design method of DDR3-SDRAM controller is studied, the data format of CMOS camera output through Camera Link interface is introduced, and the hardware circuit of each module of the memory is designed. Finally, the hardware testing platform based on DDR3-SDRAM high speed video memory is built. The results show that the bandwidth utilization of DDR3-SDRAM can be improved by reasonable design, and the collected video data can be stored through high-speed video memory without losing frame. Finally, the real-time display is carried out on the upper computer.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP333

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