基于ARM的网络区长台的研究与实现

发布时间：2018-05-01 17:24

  本文选题：ARM + 语音编码　； 参考：《北京交通大学》2012年硕士论文

【摘要】：伴随着我国铁路的大发展,铁路系统对铁路通信设备的要求也越来越高,同时对运营成本的控制也需要加强,所以网络区长台的需求就出现了。简单地说,网络区长台和目前的区长台最主要的区别就是实现了远程操控功能,这样就大大降低了铁路运营的人工成本,更体现出铁路行业的科学管理水平。 本论文主要做了两大块内容：第一,语音编码在ARM平台上的实现；第二,TCP/IP协议在ARM上的实现。下面分别作出说明。 语音编解码技术是随着数字信号处理技术的发展而发展的。现如今语音编码技术发展越来越迅猛,究其原因是其强大的传输优势和存储优势,所以语音编解码技术在传输和存储方面具有很重要的现实意义。在如今的通信领域,语音编解码技术已经是最重要的和最基本的技术之一了。本文主要介绍的语音编码的基础理论知识,包括信号数字化、线性预测理论、g.729的算法等。然后是ARM硬件平台的搭建,使其在硬件上得到了实现。然后将u C/OS-Ⅱ统移植到ARM硬件里去。最后,针对g.729的算法进行了软件设计与实现,并对代码进行了优化,用图示的方法进行了效果说明,从而成功地实现了这项任务。 对于TCP/IP协议,是现在的一个研究热点,而且其应用范围及其广泛,所以其现实意义十分重大。在嵌入式领域,其应用价值同样如此。据某媒体报道,将来的网络信息中有百分之七十将是来自嵌入式系统的信息,从而产生巨大的经济效益。本文中首先针对TCP/IP协议进行了硬件处理器的搭建,这里采用S3C2440处理器。然后是μ C/OS-Ⅱ系统的移植,最后同样也是TCP/IP协议的软件设计与实现,并对其中的ARP协议,IP协议,ICMP协议,TCP协议等协议进行了仔细研究,最后用图示的方法说明其传输效果,从而也实现了远程传输功能。 文章的结构如下：第一章,主要介绍一下本文理论研究背景和意义。第二章,主要介绍一下语音编码的基本理论知识。第三章,主要是网络区长台系统的硬件设计。第四章,介绍了网络区长台系统的软件设计。最后一章,主要总结了研究成果和发展前景等。
[Abstract]:With the development of railway in our country, the demand of railway system for railway communication equipment is higher and higher, and the control of operation cost also needs to be strengthened. To put it simply, the main difference between the network and the current long station is to realize the remote control function, which greatly reduces the labor cost of the railway operation and reflects the scientific management level of the railway industry. This thesis mainly includes two parts: first, the implementation of speech coding on ARM platform; secondly, the implementation of TCP / IP protocol on ARM. The following are explained separately. Speech coding and decoding technology is developing with the development of digital signal processing technology. Nowadays, speech coding technology is developing more and more rapidly, which is due to its strong transmission and storage advantages, so speech coding and decoding technology has a very important practical significance in transmission and storage. Nowadays, speech coding and decoding technology is one of the most important and basic technologies in the field of communication. This paper mainly introduces the basic theoretical knowledge of speech coding, including signal digitization, linear prediction theory, algorithm of g. 729 and so on. Then the ARM hardware platform is built, so that it has been implemented in the hardware. Then the U C / OS-II system is transplanted into ARM hardware. Finally, the software is designed and implemented for the algorithm of g.729, and the code is optimized, the effect is illustrated by the method of diagram, and the task is realized successfully. For TCP/IP protocol, it is a hot research topic now, and its application scope and wide range, so its realistic significance is very important. In the embedded field, its application value is the same. According to a media report, 70% of the network information in the future will come from embedded systems, resulting in huge economic benefits. In this paper, first of all, the hardware processor is built for TCP/IP protocol, and the S3C2440 processor is used here. Then there is the transplant of 渭 C / OS- 鈪，

本文编号：1830368