本文選題：ARM + 語(yǔ)音編碼��； 參考：《北京交通大學(xué)》2012年碩士論文

【摘要】：伴隨著我國(guó)鐵路的大發(fā)展,鐵路系統(tǒng)對(duì)鐵路通信設(shè)備的要求也越來(lái)越高,同時(shí)對(duì)運(yùn)營(yíng)成本的控制也需要加強(qiáng),所以網(wǎng)絡(luò)區(qū)長(zhǎng)臺(tái)的需求就出現(xiàn)了。簡(jiǎn)單地說(shuō),網(wǎng)絡(luò)區(qū)長(zhǎng)臺(tái)和目前的區(qū)長(zhǎng)臺(tái)最主要的區(qū)別就是實(shí)現(xiàn)了遠(yuǎn)程操控功能,這樣就大大降低了鐵路運(yùn)營(yíng)的人工成本,更體現(xiàn)出鐵路行業(yè)的科學(xué)管理水平。 本論文主要做了兩大塊內(nèi)容：第一,語(yǔ)音編碼在ARM平臺(tái)上的實(shí)現(xiàn)；第二,TCP/IP協(xié)議在ARM上的實(shí)現(xiàn)。下面分別作出說(shuō)明。 語(yǔ)音編解碼技術(shù)是隨著數(shù)字信號(hào)處理技術(shù)的發(fā)展而發(fā)展的�，F(xiàn)如今語(yǔ)音編碼技術(shù)發(fā)展越來(lái)越迅猛,究其原因是其強(qiáng)大的傳輸優(yōu)勢(shì)和存儲(chǔ)優(yōu)勢(shì),所以語(yǔ)音編解碼技術(shù)在傳輸和存儲(chǔ)方面具有很重要的現(xiàn)實(shí)意義。在如今的通信領(lǐng)域,語(yǔ)音編解碼技術(shù)已經(jīng)是最重要的和最基本的技術(shù)之一了。本文主要介紹的語(yǔ)音編碼的基礎(chǔ)理論知識(shí),包括信號(hào)數(shù)字化、線性預(yù)測(cè)理論、g.729的算法等。然后是ARM硬件平臺(tái)的搭建,使其在硬件上得到了實(shí)現(xiàn)。然后將u C/OS-Ⅱ統(tǒng)移植到ARM硬件里去。最后,針對(duì)g.729的算法進(jìn)行了軟件設(shè)計(jì)與實(shí)現(xiàn),并對(duì)代碼進(jìn)行了優(yōu)化,用圖示的方法進(jìn)行了效果說(shuō)明,從而成功地實(shí)現(xiàn)了這項(xiàng)任務(wù)。 對(duì)于TCP/IP協(xié)議,是現(xiàn)在的一個(gè)研究熱點(diǎn),而且其應(yīng)用范圍及其廣泛,所以其現(xiàn)實(shí)意義十分重大。在嵌入式領(lǐng)域,其應(yīng)用價(jià)值同樣如此。據(jù)某媒體報(bào)道,將來(lái)的網(wǎng)絡(luò)信息中有百分之七十將是來(lái)自嵌入式系統(tǒng)的信息,從而產(chǎn)生巨大的經(jīng)濟(jì)效益。本文中首先針對(duì)TCP/IP協(xié)議進(jìn)行了硬件處理器的搭建,這里采用S3C2440處理器。然后是μ C/OS-Ⅱ系統(tǒng)的移植,最后同樣也是TCP/IP協(xié)議的軟件設(shè)計(jì)與實(shí)現(xiàn),并對(duì)其中的ARP協(xié)議,IP協(xié)議,ICMP協(xié)議,TCP協(xié)議等協(xié)議進(jìn)行了仔細(xì)研究,最后用圖示的方法說(shuō)明其傳輸效果,從而也實(shí)現(xiàn)了遠(yuǎn)程傳輸功能。 文章的結(jié)構(gòu)如下：第一章,主要介紹一下本文理論研究背景和意義。第二章,主要介紹一下語(yǔ)音編碼的基本理論知識(shí)。第三章,主要是網(wǎng)絡(luò)區(qū)長(zhǎng)臺(tái)系統(tǒng)的硬件設(shè)計(jì)。第四章,介紹了網(wǎng)絡(luò)區(qū)長(zhǎng)臺(tái)系統(tǒng)的軟件設(shè)計(jì)。最后一章,主要總結(jié)了研究成果和發(fā)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，

本文編號(hào)：1830368