本文選題：Android + 視頻采集��； 參考：《河南師范大學(xué)》2012年碩士論文

【摘要】：隨著計(jì)算機(jī)技術(shù)的發(fā)展，電子工藝的提高，人為需求的增長(zhǎng)，嵌入式系統(tǒng)基于其自身的多功能、可靠性強(qiáng)、成本低、體積小，成為電子產(chǎn)品市場(chǎng)的主流技術(shù)，應(yīng)用于航天，航海，飛行，無線通信，消費(fèi)電子等各個(gè)領(lǐng)域。 視頻采集及其顯示存儲(chǔ)系統(tǒng)，以其自身的直觀性，方便性，內(nèi)容豐富，易保持性，用于城市交通，國(guó)民生活的各個(gè)領(lǐng)域。隨著嵌入式操作系統(tǒng)技術(shù)，計(jì)算機(jī)技術(shù)，固件技術(shù)的發(fā)展，使得視頻采集及其現(xiàn)實(shí)存儲(chǔ)技術(shù)越來越完善。 強(qiáng)大的Android平臺(tái)，基于其自身特性，得到市場(chǎng)廣泛的支持，并迅速的在世紀(jì)風(fēng)靡起來。在多媒體方面，雖然其功能已經(jīng)相當(dāng)完備，但是據(jù)調(diào)查Android2.1和Android2.2版本，以及以前的版本雖然有支持H.264解碼功能，但是并沒有編碼功能。Android2.3版本雖然其OpenCore中集成了H.264的編碼類，但在官方發(fā)布的系統(tǒng)中，CAMER只能預(yù)覽，不能拍照以及錄像編碼。所以H.264作為新一代的視頻編碼標(biāo)準(zhǔn)由于其在誤碼率、傳輸速率、畫面質(zhì)量、編碼壓縮率和網(wǎng)絡(luò)適應(yīng)能力等方面都優(yōu)于早期的編碼格式，其和Android平臺(tái)的結(jié)合是大勢(shì)所趨，是市場(chǎng)研究的重要方向之一。本文研究了基于Android2.3操作系統(tǒng)，采用基于ARM11微處理器的先進(jìn)的硬件平臺(tái)并實(shí)現(xiàn)硬件平臺(tái)的構(gòu)建，軟件上采用目前國(guó)際最先進(jìn)的H.264視頻格式進(jìn)行信息的采集顯示和存儲(chǔ)系統(tǒng)的實(shí)現(xiàn)，，最后在構(gòu)建的硬件平臺(tái)上實(shí)現(xiàn)了基于Android操作系統(tǒng)的H.264格式的編解碼和視頻顯示和編碼后數(shù)據(jù)流存儲(chǔ)的功能，并在實(shí)現(xiàn)過程中提高了常規(guī)編碼的編碼幀率和實(shí)現(xiàn)一屏多顯的功能。 本文首先介紹了課題的研究背景及意義，并介紹了編碼標(biāo)準(zhǔn)的發(fā)展歷史；然后介紹并研究了Android操作系統(tǒng)的架構(gòu)，研究了Android操作系統(tǒng)框架結(jié)構(gòu)中各層的功能及層次的相關(guān)性。側(cè)重介紹了Linux核心操作系統(tǒng)；再次從總體上對(duì)系統(tǒng)進(jìn)行軟硬件設(shè)計(jì)，預(yù)測(cè)了系統(tǒng)在實(shí)行中將遇到的理論知識(shí)，并做理論研究，結(jié)合研究實(shí)際從理論上闡述視頻系統(tǒng)的顯示原理，最后，對(duì)硬件平臺(tái)進(jìn)行分析，給出預(yù)設(shè)的硬件系統(tǒng)，并對(duì)軟件框架進(jìn)行分析和設(shè)計(jì)，給出軟件系統(tǒng)的設(shè)計(jì)方案；在完成基于Android操作系統(tǒng)視頻采集及顯示和存儲(chǔ)的設(shè)計(jì)的基礎(chǔ)上，分析了實(shí)際采用的軟硬件平臺(tái)，講述實(shí)際工作中平臺(tái)構(gòu)建過程，和軟件開發(fā)采納的軟工具，并研究了開發(fā)過程中遇到的問題和解決方法，另外著重介紹了Linux系統(tǒng)多媒體的核心支持模塊，研究了核心代碼；最后給出了系統(tǒng)經(jīng)調(diào)試實(shí)現(xiàn)功能的核心代碼，并在分析代碼的基礎(chǔ)上講解了linux內(nèi)核線程通信機(jī)制，用戶空間和內(nèi)核空間信息交換等方法。最終在基于ARM11體系結(jié)構(gòu)的S3C6410處理器開發(fā)板上得到實(shí)現(xiàn)。 此方案具有高速率、高幀率、高性價(jià)比、高穩(wěn)定性并且運(yùn)行可靠的特點(diǎn)，是目前市場(chǎng)研究的一個(gè)重要方向之一。
[Abstract]:With the development of computer technology, the improvement of electronic technology and the increase of artificial demand, embedded system has become the mainstream technology of electronic products market and applied in spaceflight because of its multifunction, high reliability, low cost and small volume.Navigation, flight, wireless communications, consumer electronics and other fields.Video capture and its display and storage system, with its own intuitive, convenient, rich content, easy to maintain, used in various fields of urban traffic and national life.With the development of embedded operating system technology, computer technology and firmware technology, video capture and its real storage technology become more and more perfect.The powerful Android platform, based on its own characteristics, has been widely supported by the market, and quickly became popular in the century.In terms of multimedia, although its functionality is quite complete, it is investigated that the Android2.1 and Android2.2 versions, as well as previous versions that support H. 264 decoding, do not have encoding capabilities. Android 2.3, although its OpenCore incorporates H.264 encoding classes,But in the officially released system, Camer can only preview, not photograph and video coding.Therefore, as a new generation of video coding standards, H.264 is superior to the early coding format in error rate, transmission rate, picture quality, coding compression ratio and network adaptability. The combination of H.264 and Android platform is the trend of the times.Is one of the important directions of market research.In this paper, the advanced hardware platform based on ARM11 microprocessor and Android2.3 operating system is studied. The most advanced H.264 video format is used in the software to realize the information acquisition and storage system.Finally, the coding and decoding of H.264 format based on Android operating system, video display and data stream storage after encoding are realized on the hardware platform constructed. In the process of implementation, the coding frame rate of conventional coding and the function of one screen and multiple display are improved.This paper first introduces the research background and significance of the subject, and introduces the history of coding standards, and then introduces and studies the architecture of Android operating system, and studies the function of each layer in the framework of Android operating system and the correlation of each layer.This paper mainly introduces the core operating system of Linux, designs the hardware and software of the system in general, predicts the theoretical knowledge that the system will meet in practice, and does theoretical research, and expounds the display principle of video system in theory combined with the research practice.Finally, the hardware platform is analyzed, the preset hardware system is given, and the software framework is analyzed and designed, and the design scheme of the software system is given, which is based on the design of video capture, display and storage based on the Android operating system.This paper analyzes the software and hardware platforms used in practice, describes the construction process of the platform and the software tools adopted in the software development, and studies the problems encountered in the development process and the solutions.In addition, the core supporting module of multimedia in Linux system is introduced, and the core code is studied. Finally, the core code of the debugging function of the system is given, and the mechanism of linux kernel thread communication is explained on the basis of analyzing the code.User space and kernel space information exchange and other methods.Finally, it is implemented on the S3C6410 processor development board based on ARM11 architecture.This scheme has the characteristics of high speed, high frame rate, high performance-price ratio, high stability and reliable operation.
【學(xué)位授予單位】：河南師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2012
【分類號(hào)】：TN919.81;TP333

【引證文獻(xiàn)】

相關(guān)碩士學(xué)位論文 前1條

1 楊飛;基于Android的家用移動(dòng)視頻監(jiān)控系統(tǒng)的研究與實(shí)現(xiàn)[D];廣東工業(yè)大學(xué);2013年

本文編號(hào)：1766807