本文選題：嵌入式 + H.264　； 參考：《武漢科技大學(xué)》2012年碩士論文

【摘要】：隨著嵌入式開(kāi)發(fā)技術(shù)、計(jì)算機(jī)網(wǎng)絡(luò)技術(shù)和多媒體技術(shù)的不斷發(fā)展與完善，這些技術(shù)越來(lái)越廣泛的應(yīng)用到電力行業(yè)，對(duì)輸電設(shè)備進(jìn)行全方位視頻監(jiān)控已經(jīng)越來(lái)越可行。由于傳統(tǒng)的有線網(wǎng)和無(wú)線網(wǎng)傳輸帶寬有限，嚴(yán)重阻礙了視頻的實(shí)時(shí)傳輸，為了在有限的帶寬下流暢的傳輸高質(zhì)量視頻，ITU-T和ISO/IEC共同制訂出新一代視頻圖像壓縮編碼標(biāo)準(zhǔn)H.264/AVC。與之前的壓縮編碼標(biāo)準(zhǔn)相比，H.264極大的提高了視頻壓縮比，但代價(jià)是增加了編碼算法的復(fù)雜度。近些年，隨著微處理器的各項(xiàng)性能不斷地提高，在嵌入式系統(tǒng)上實(shí)現(xiàn)基于H.264壓縮的視頻通信越來(lái)越變得簡(jiǎn)易可行。嵌入式技術(shù)與新一代的視頻壓縮技術(shù)H.264相結(jié)合必將成為智能電網(wǎng)在視頻通信領(lǐng)域的發(fā)展趨勢(shì)。 基于此，本文以三星公司推出的S3C2440微處理器為核心，結(jié)合嵌入式Linux系統(tǒng)以及新一代的視頻壓縮編碼標(biāo)準(zhǔn)H.264，設(shè)計(jì)并實(shí)現(xiàn)了一個(gè)嵌入式H.264視頻通信系統(tǒng)。通過(guò)對(duì)嵌入式、數(shù)字圖像處理等技術(shù)的研究，提出了基于mini2440開(kāi)發(fā)平臺(tái)的視頻通信系統(tǒng)的設(shè)計(jì)方案。論文的主要工作從以下幾個(gè)方面展開(kāi)：一是針對(duì)系統(tǒng)需要用到的硬件資源，定制了一套嵌入式Linux開(kāi)發(fā)平臺(tái)；二是分析了H.264主要功能模塊和一些關(guān)鍵的編碼技術(shù)；三是編寫(xiě)了該視頻采集與傳輸系統(tǒng)的應(yīng)用程序，，結(jié)合T264源碼，完成了視頻采集并壓縮為H.264/AVC格式的視頻數(shù)據(jù)的功能，實(shí)現(xiàn)了視頻采集、壓縮系統(tǒng)的軟件設(shè)計(jì)，并利用UDP協(xié)議完成了壓縮視頻流的發(fā)送。 測(cè)試結(jié)果表明，在平緩場(chǎng)景下，本系統(tǒng)具有圖像壓縮率高、質(zhì)量好的優(yōu)點(diǎn)，在mini2440開(kāi)發(fā)板上視頻延遲時(shí)間小，能夠?qū)崿F(xiàn)對(duì)輸電設(shè)備的遠(yuǎn)程監(jiān)測(cè)。該系統(tǒng)結(jié)構(gòu)簡(jiǎn)單，性能穩(wěn)定可靠，對(duì)輸電設(shè)備視頻監(jiān)測(cè)的研究具有一定的參考價(jià)值。
[Abstract]:With the development and perfection of embedded development technology, computer network technology and multimedia technology, these technologies are more and more widely used in the power industry. Due to the limited transmission bandwidth of traditional wired and wireless networks, the real-time video transmission is seriously hindered. In order to transmit high-quality video smoothly with limited bandwidth, a new generation video compression coding standard H.264 / AVC has been developed by ITU-T and ISO/IEC. Compared with the previous compression coding standard, H.264 greatly improves the video compression ratio, but the cost is to increase the complexity of the coding algorithm. In recent years, with the improvement of microprocessor performance, video communication based on H.264 compression becomes more and more simple and feasible in embedded system. The combination of embedded technology and new generation video compression technology H.264 will become the development trend of smart grid in the field of video communication. Based on this, this paper designs and implements an embedded H.264 video communication system based on the S3C2440 microprocessor developed by Samsung, combined with the embedded Linux system and the new video compression coding standard H.264. Based on the research of embedded, digital image processing and other technologies, the design scheme of video communication system based on mini2440 development platform is put forward. The main work of this paper is as follows: firstly, a set of embedded Linux development platform is customized for the hardware resources needed by the system; second, the main function modules and some key coding technologies of H.264 are analyzed. Thirdly, the application program of the video acquisition and transmission system is written, and the function of video capture and compression into H.264/AVC format is completed with T264 source code, and the software design of video acquisition and compression system is realized. The transmission of compressed video stream is accomplished by using UDP protocol. The test results show that the system has the advantages of high image compression ratio and good quality. The video delay time on the mini2440 development board is small and the remote monitoring of transmission equipment can be realized. The system is simple in structure, stable and reliable in performance, and has a certain reference value for the research of transmission equipment video monitoring.
【學(xué)位授予單位】：武漢科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TN919.8;TP368.1

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