多图层下增强乘客信息系统性能研究
发布时间：2018-07-15 08:22
【摘要】：乘客信息系统(Passenger information system,PIS)是依托多媒体网络技术,以计算机系统为核心,通过设置站厅、站台、出入口、列车的显示终端,让乘客及时准确地了解列车运营信息和公共媒体信息的多媒体综合信息系统。PIS系统已经成为一种举足轻重的信息传递媒介,实现PIS系统性能的高效化,稳定化是我们面临的非常重要的一个课题,从各个方面寻求途径来实现PIS系统性能的提升是我们所面临的一个重要任务。为了实现PIS系统性能的提升,本文分析了 PIS系统下的系统性能的影响因素,并通过对这些因素的分析以及对提供硬件图形加速的高效视频编码处理芯片SMP8756的利用,研究了面向对象的框架Qt与DirectFB在SMP8756多媒体芯片系统内的移植方法以及如何在SMP8756多媒体芯片中通过多图层的模块设计实现对PIS系统的性能进行提升。同时本文利用了 Qt与DirectFB的联合开发方式,对PIS终端显示系统的功能模块进行分析设计,实现了对PIS终端显示系统的功能的开发。本文利用不同的开发技术与设计思路设计了三个不同的设计方案,通过对第一种单图层设计方案的设计分析,研究了该设计的主要缺陷并针对其性能低下可靠性不足的问题进行了分析改进,在此的基础上提出了多图层设计方案并进行设计实现,本文通过对单层设计方案与多层设计方案的性能比较,证实了 PIS系统在多图层设计方案下的性能提升。同时本文对前两种方案的设计思路进行了研究,分析了其扩展性差适用性较低的原因,并提出了接口化设计方案的设计思路,以提高设计方案的扩展性与适用性。本文实现了一个典型的嵌入式开发项目,采用了嵌入式开发的一般方法,研究了开发库在嵌入式环境中的移植方法,提出了能提升PIS系统性能的设计方案,并对项目的性能进行了有效测试,为PIS相关系统的开发提供了良好的设计思路。
[Abstract]:Passenger information system is based on multimedia network technology, computer system as the core, through the establishment of station hall, platform, entrance and exit, train display terminal, The multimedia integrated information system (.PIS), which enables passengers to understand train operation information and public media information in a timely and accurate manner, has become an important information transmission medium and has achieved high efficiency in the performance of the PiS system. Stabilization is a very important task for us. It is an important task for us to find ways to improve the performance of PiS system from all aspects. In order to improve the performance of the PiS system, this paper analyzes the influencing factors of the system performance under the PiS system, and through the analysis of these factors as well as the use of SMP8756, a high efficiency video coding chip, which provides hardware graphics acceleration. This paper studies the transplanting method of object-oriented framework QT and DirectFB in SMP8756 multimedia chip system and how to improve the performance of PiS system through multi-layer module design in SMP8756 multimedia chip. At the same time, this paper uses QT and DirectFB to develop the function module of the display system of the PiS terminal, and realizes the development of the function of the display system of the PiS terminal. In this paper, three different design schemes are designed by using different development techniques and design ideas. Through the design analysis of the first single layer design scheme, The main defects of the design are studied, and the problems of low performance and low reliability are analyzed and improved. Based on this, a multi-layer design scheme is proposed and implemented. By comparing the performance of the single-layer design scheme with the multi-layer design scheme, it is proved that the performance of the PiS system under the multi-layer design scheme is improved. At the same time, this paper studies the design ideas of the first two schemes, analyzes the reasons for the poor applicability of the two schemes, and puts forward the design idea of the interface design scheme, in order to improve the expansibility and applicability of the design scheme. This paper implements a typical embedded development project, adopts the general method of embedded development, studies the method of transplanting the development library in the embedded environment, and puts forward a design scheme that can improve the performance of the PiS system. The performance of the project is tested effectively, which provides a good design idea for the development of the PiS related system.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP399-C6
本文编号：2123453
[Abstract]:Passenger information system is based on multimedia network technology, computer system as the core, through the establishment of station hall, platform, entrance and exit, train display terminal, The multimedia integrated information system (.PIS), which enables passengers to understand train operation information and public media information in a timely and accurate manner, has become an important information transmission medium and has achieved high efficiency in the performance of the PiS system. Stabilization is a very important task for us. It is an important task for us to find ways to improve the performance of PiS system from all aspects. In order to improve the performance of the PiS system, this paper analyzes the influencing factors of the system performance under the PiS system, and through the analysis of these factors as well as the use of SMP8756, a high efficiency video coding chip, which provides hardware graphics acceleration. This paper studies the transplanting method of object-oriented framework QT and DirectFB in SMP8756 multimedia chip system and how to improve the performance of PiS system through multi-layer module design in SMP8756 multimedia chip. At the same time, this paper uses QT and DirectFB to develop the function module of the display system of the PiS terminal, and realizes the development of the function of the display system of the PiS terminal. In this paper, three different design schemes are designed by using different development techniques and design ideas. Through the design analysis of the first single layer design scheme, The main defects of the design are studied, and the problems of low performance and low reliability are analyzed and improved. Based on this, a multi-layer design scheme is proposed and implemented. By comparing the performance of the single-layer design scheme with the multi-layer design scheme, it is proved that the performance of the PiS system under the multi-layer design scheme is improved. At the same time, this paper studies the design ideas of the first two schemes, analyzes the reasons for the poor applicability of the two schemes, and puts forward the design idea of the interface design scheme, in order to improve the expansibility and applicability of the design scheme. This paper implements a typical embedded development project, adopts the general method of embedded development, studies the method of transplanting the development library in the embedded environment, and puts forward a design scheme that can improve the performance of the PiS system. The performance of the project is tested effectively, which provides a good design idea for the development of the PiS related system.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP399-C6
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