發(fā)布時間：2018-04-02 01:40

  本文選題：視頻采集　切入點：壓縮　出處：《濟南大學(xué)》2012年碩士論文

【摘要】：隨著互聯(lián)網(wǎng)和各種高科技的高速發(fā)展和廣泛普及，已將我們置身于一個全新的信息時代。而如何獲得信息，并將獲得的信息為我們所用，顯得至關(guān)重要。視頻作為信息的載體之一，在其中的作用不可忽視。監(jiān)控是獲得視頻的最重要手段之一，視頻采集、視頻編碼壓縮、視頻發(fā)送與接收是視頻監(jiān)控中的重要組成部分。隨著計算機通信技術(shù)的不斷發(fā)展，以及監(jiān)控實時性需求的不斷增長，如何獲得實時高質(zhì)量的視頻信息顯得至關(guān)重要。 FPGA作為當(dāng)今硬件設(shè)計的基石，以其高速度、高密度、高性能、低成本的特性，加上各種硬件廠商提供的視頻解決方案，使得它在監(jiān)控系統(tǒng)的應(yīng)用越來越廣泛；Wince5.0與ARM9結(jié)合的開發(fā)平臺，將Wince5.0強大的內(nèi)核、開源、擴展性強和可裁決等優(yōu)勢與ARM9微型化、性能高、功耗低、低價格等優(yōu)勢相結(jié)合，使得它們在嵌入式開發(fā)中的應(yīng)用越來越廣泛。本文分別利用了FPGA靈活性，可編程性的優(yōu)勢，以及ARM強大的控制能力，完成了對于視頻采集壓縮模塊和無線發(fā)送模塊的設(shè)計。 視頻采集模塊主要分為IIC控制模塊、有效視頻抽取模塊、視頻預(yù)處理模塊、SDRAM幀存模塊、基于IP核的壓縮編碼模塊。IIC控制模塊控制TVP5146模塊完成模擬視頻數(shù)據(jù)向數(shù)字視頻數(shù)據(jù)的轉(zhuǎn)換；有效視頻抽取模塊負責(zé)將TVP5146解碼的視頻數(shù)據(jù)完成有效視頻抽取，使其符合H.264編碼器的格式需要；視頻預(yù)處理模塊主要完成Y、Cb、C視頻數(shù)據(jù)的分離，本模塊采用兩片D_RAM之間的乒乓操作完成了設(shè)計；SDRAM幀存控制模塊同樣采用兩片SDRAM之間的乒乓操作，完成了視頻視頻的緩存，同時負責(zé)將視頻數(shù)據(jù)按照一定格式送至壓縮編碼模塊進行壓縮；基于IP核的壓縮編碼模塊主要完成視頻數(shù)據(jù)的壓縮，壓縮完的視頻數(shù)據(jù)送至U6100模塊進行無線傳輸。 無線傳輸模塊采用基于ARM9和Wince5.0的開發(fā)平臺，ARM9作為控制器，控制U6100模塊完成視頻數(shù)據(jù)的發(fā)送；Wince5.0是模塊化系統(tǒng)，使用方便，使用PB進行系統(tǒng)定制，并完成U6100無線模塊驅(qū)動的加載，，而待發(fā)送的視頻流基于RTP協(xié)議封裝，然后發(fā)送至終端服務(wù)器。
[Abstract]:With the rapid development and popularization of the Internet and various kinds of high technology, we have been placed in a new information age. Video as one of the carriers of information can not be ignored. Monitoring is one of the most important means to obtain video, video capture, video coding and compression, Video transmission and reception is an important part of video surveillance. With the development of computer communication technology and the growing demand of real-time monitoring, it is very important to obtain real-time and high-quality video information. FPGA is the cornerstone of today's hardware design, with its high speed, high density, high performance, low cost features, together with a variety of hardware vendors to provide video solutions, It makes it more and more widely used in the monitoring system with the combination of Wince5.0 and ARM9. It combines the advantages of Wince5.0 's powerful kernel, open source, expansibility and arbitrability with the advantages of ARM9 miniaturization, high performance, low power consumption, low price, etc. It makes them more and more widely used in embedded development. This paper makes use of the advantages of FPGA flexibility, programmability, and the powerful control ability of ARM to complete the design of video capture and compression module and wireless transmission module. The video acquisition module is mainly divided into IIC control module, effective video extraction module, video preprocessing module and SDRAM frame storage module. The compression coding module based on IP core. IIC control module controls the TVP5146 module to complete the conversion of analog video data to digital video data, and the effective video extraction module is responsible for effectively extracting the video data decoded by TVP5146. The video preprocessing module mainly completes the separation of the video data between the two pieces of D_RAM, and the Ping-Pong operation between the two pieces of D_RAM is used to complete the design of the Ping-Pong operation between the two pieces of SDRAM, and the Ping-Pong operation between the two pieces of SDRAM is also used in the design of the Ping-Pong control module, which is designed to meet the needs of the H.264 encoder. At the same time, the video data is sent to the compression coding module according to a certain format. The compression coding module based on IP core mainly completes the compression of video data. The compressed video data is sent to the U6100 module for wireless transmission. The wireless transmission module uses ARM9, a development platform based on ARM9 and Wince5.0, as the controller, and controls the U6100 module to complete the transmission of video data. Wince5.0 is a modular system. It is convenient to use, and use PB to customize the system, and complete the loading of U6100 wireless module driver. The video stream to be sent is encapsulated based on RTP protocol and sent to the terminal server.
【學(xué)位授予單位】：濟南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TP368.1;TN919.8

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