【摘要】：超短波電臺作為戰(zhàn)術(shù)通信系統(tǒng)中的中繼臺、終端臺以及移動站,是軍事通信中常用的設(shè)備,具有抗干擾性強、通信頻帶寬等特點。傳統(tǒng)的超短波電臺以話音和簡單的數(shù)據(jù)傳輸為核心功能,話音通信無法更好地描述戰(zhàn)況,數(shù)據(jù)傳輸需要使用電腦,便攜性差,很難再適應現(xiàn)代戰(zhàn)場通信。為此,本文對超短波電臺的傳輸業(yè)務(wù)功能提出了更高的設(shè)計需求。本文從實際戰(zhàn)場運用出發(fā)設(shè)計了多媒體傳輸系統(tǒng),使得超短波電臺具備圖像、文字以及視頻傳輸,大大提高了系統(tǒng)的便攜性、實用性。該系統(tǒng)采用Android手機App采集多媒體信息并對信息進行編碼壓縮打包,按照特殊的傳輸協(xié)議傳輸,通過Wifi發(fā)送給超短波電臺,超短波電臺通過射頻信號將信息發(fā)送給收方電臺,最后由PC端上位機軟件實時解碼顯示傳輸信息。論文首先介紹了這一課題相關(guān)背景以及研究現(xiàn)狀,并對Android系統(tǒng)架構(gòu)、H.264壓縮編碼標準以及JPEG圖像壓縮算法進行研究,同時還仿真分析了運動估計中的全搜索、菱形搜索、六邊形搜索算法。其次介紹了超短波電臺的硬件結(jié)構(gòu)以及數(shù)據(jù)傳輸特點,并圍繞超短波電臺為中心設(shè)計整個系統(tǒng)框架。本文針對整個系統(tǒng)鏈路進行分層建模,分析超短波電臺的傳輸特點采用UDP傳輸數(shù)據(jù),并對TCP協(xié)議中的停止等待協(xié)議以及流水線傳輸方式進行了研究,在此基礎(chǔ)上,研究制定適合超短波電臺的圖片傳輸RDTP協(xié)議,實現(xiàn)了可靠傳輸。在視頻傳輸協(xié)議方面,本文比較傳統(tǒng)的RTP包封裝方案,采用了一種基于幀長度的RTP包封裝方案。本文在具體的設(shè)計實現(xiàn)過程中,設(shè)計了Android系統(tǒng)的App,App除了實現(xiàn)圖像和文字信息采集以外,還對圖像進行JPEG壓縮編碼以及H.264編碼。文字和圖片數(shù)據(jù)按照RDTP協(xié)議傳輸,而實時視頻流數(shù)據(jù)按照RTP/UDP傳輸。本文還設(shè)計實現(xiàn)了嵌入式Wifi接口模塊,并將u C/OS-ii移植到該模塊上,在該模塊上編程實現(xiàn)超短波電臺與手機以及PC端的無線通信。最后在PC端設(shè)計了界面友好的上位機軟件,接收數(shù)據(jù)并實時顯示文字、圖像以及視頻。經(jīng)系統(tǒng)測試,結(jié)果表明整個多媒體系統(tǒng)符合設(shè)計需求,可在超短波電臺上實現(xiàn)圖片、文字、實時視頻傳輸。
[Abstract]:As the relay station, terminal station and mobile station in tactical communication system, ultrashort radio is a common equipment in military communication, which has the characteristics of strong anti-jamming and communication frequency bandwidth. The traditional ultrashort wave radio station has the core function of voice and simple data transmission. Voice communication can not describe the situation of war better. Data transmission needs to use computer, so it is difficult to adapt to modern battlefield communication. Therefore, this paper puts forward a higher design requirement for the transmission service function of ultrashort wave radio station. This paper designs a multimedia transmission system based on the actual battlefield application, which makes ultrashort wave radio station with image, text and video transmission, which greatly improves the portability and practicability of the system. The system uses Android mobile phone App to collect multimedia information and encode, compress and package the information. According to the special transmission protocol, the system transmits the information to the ultrashort radio station through Wifi, which sends the information to the receiver station through radio frequency signal. Finally, the transmission information is decoded and displayed by PC software. Firstly, this paper introduces the background and research status of this subject, and studies the Android system architecture, H.264 compression coding standard and JPEG image compression algorithm. At the same time, it also simulates and analyzes the full search and rhombus search in motion estimation. Hexagonal search algorithm. Secondly, the hardware structure and data transmission characteristics of ultrashort wave station are introduced, and the whole system frame is designed around the center of ultrashort wave station. In this paper, the hierarchical modeling of the whole system link is carried out, and the transmission characteristics of ultrashort wave radio are analyzed by using UDP, and the stop wait protocol and pipeline transmission mode in TCP protocol are studied. The RDTP protocol suitable for ultrashort wave radio transmission is studied and the reliable transmission is realized. In the aspect of video transmission protocol, this paper compares the traditional RTP packet encapsulation scheme, and adopts a frame length based RTP packet encapsulation scheme. In this paper, in the process of design and implementation, the App,App of Android system is designed. In addition to the image and text information collection, the JPEG compression coding and H. 264 coding of the image are also carried out. Text and picture data are transmitted according to RDTP protocol, while real-time video stream data is transmitted according to RTP/UDP. The embedded Wifi interface module is also designed and implemented in this paper, and u C/OS-ii is transplanted to the module. The wireless communication between ultrashort wave radio station, mobile phone and PC terminal is realized by programming on this module. At last, a friendly interface software is designed in PC to receive data and display text, image and video in real time. The system test results show that the whole multimedia system meets the design requirements and can transmit pictures, text and real-time video on ultrashort wave radio station.
【學位授予單位】：杭州電子科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TN924;TN919.8

【參考文獻】

相關(guān)期刊論文 前9條

1 袁中書;陸陽;;輕量級TCP/IP協(xié)議棧機制分析與優(yōu)化[J];計算機工程;2015年02期

2 鄒紹武;蘇貴斌;;Android應用開發(fā)中圖片壓縮技術(shù)的研究應用[J];計算機技術(shù)與發(fā)展;2015年06期

3 許寧;;基于RTP協(xié)議的移動視頻監(jiān)控系統(tǒng)的設(shè)計[J];通信技術(shù);2014年04期

4 黃逸暉;;車載導航音頻系統(tǒng)的設(shè)計與實現(xiàn)[J];計算機與數(shù)字工程;2013年11期

5 彭鳳凌;庹先國;王洪輝;蒲建華;;基于Android手機與遠程PC的UDP文件傳輸機制[J];計算機工程與設(shè)計;2013年10期

6 李勝峰;;通用超短波跳頻電臺的研究與實現(xiàn)[J];艦船電子工程;2012年08期

7 韋崇嶺;裴海龍;;基于無人機平臺H264視頻傳輸系統(tǒng)的設(shè)計與實現(xiàn)[J];計算機測量與控制;2012年01期

8 馬媛媛;楊峰;信科;焦方超;;基于DCT的JPEG圖像壓縮的研究[J];計算機技術(shù)與發(fā)展;2011年08期

9 張元偉;劉彥隆;;基于JPEG標準的靜態(tài)圖像壓縮算法研究[J];電子設(shè)計工程;2010年02期

相關(guān)碩士學位論文 前10條

1 陳瑋博;基于RTP的H.264視頻傳輸系統(tǒng)的研究與實現(xiàn)[D];北方工業(yè)大學;2016年

2 張曉春;達芬奇技術(shù)下的視頻處理及傳輸系統(tǒng)的軟件設(shè)計與實現(xiàn)[D];中北大學;2016年

3 趙亞慧;Android平臺下圖像加密APP設(shè)計與實現(xiàn)[D];重慶師范大學;2016年

4 何潤岸;基于UDP進行大規(guī)模數(shù)據(jù)傳輸?shù)目煽總鬏斚到y(tǒng)的設(shè)計與實現(xiàn)[D];山東大學;2015年

5 李達;無線多媒體傳感器網(wǎng)絡(luò)圖像采集與傳輸系統(tǒng)研究[D];湖北工業(yè)大學;2015年

6 呂佳;基于H.264網(wǎng)絡(luò)視頻監(jiān)控系統(tǒng)的研究與實現(xiàn)[D];哈爾濱理工大學;2015年

7 唐寬強;基于H.264的運動估計的研究和改進[D];西安電子科技大學;2014年

8 馬林;基于H.264的遠程視頻傳輸軟件系統(tǒng)的開發(fā)[D];吉林大學;2014年

9 李乃翠;基于Android與Wi-Fi的實時視頻監(jiān)控系統(tǒng)的研究[D];山東大學;2014年

10 欒麗麗;基于Android的視頻數(shù)據(jù)采集與處理[D];青島科技大學;2014年

，

本文編號：2303783