【摘要】：嵌入式DVR以其低成本、高可靠性和高集成度等優(yōu)勢(shì)在視頻監(jiān)控領(lǐng)域占有主流地位，在各個(gè)行業(yè)得到了廣泛的應(yīng)用。多通道、高清智能化的嵌入式DVR系統(tǒng)成為新的發(fā)展趨勢(shì)。本文在分析了多通道DVR系統(tǒng)的研究背景及其具體應(yīng)用需求的基礎(chǔ)上，研究并實(shí)現(xiàn)了多通道DVR系統(tǒng)軟件中涉及的音視頻編解碼標(biāo)準(zhǔn)、多通道音視頻數(shù)據(jù)的網(wǎng)絡(luò)傳輸、DirectX等關(guān)鍵技術(shù)。 首先，設(shè)計(jì)了多通道DVR系統(tǒng)軟件的總體方案。系統(tǒng)采用C/S架構(gòu)，分為服務(wù)器軟件和客戶(hù)端軟件兩個(gè)部分。按功能將服務(wù)器軟件，劃分為多通道音視頻數(shù)據(jù)的采集與編碼模塊、數(shù)據(jù)傳輸模塊、存儲(chǔ)模塊和控制模塊。客戶(hù)端軟件運(yùn)行于Windows系統(tǒng)，分為配置與管理模塊、多通道音視頻數(shù)據(jù)的接收與處理模塊、解碼模塊以及播放顯示模塊。 其次，采用由主線程創(chuàng)建其他線程后退化為控制線程的方式，進(jìn)而由控制線程來(lái)實(shí)現(xiàn)管理控制系統(tǒng)中各個(gè)通道的多個(gè)線程間相互協(xié)調(diào)工作。設(shè)計(jì)了Basket Manager文件存儲(chǔ)結(jié)構(gòu)，有序高效的實(shí)現(xiàn)了多個(gè)通道音視頻數(shù)據(jù)的本地硬盤(pán)存儲(chǔ)。同時(shí)提供基于時(shí)間和通道信息的索引，實(shí)現(xiàn)在本地硬盤(pán)內(nèi)自動(dòng)搜索并下載數(shù)據(jù)文件的功能。 再次，采用多線程并發(fā)處理技術(shù)以及基于雙緩沖隊(duì)列容器的媒體接收緩存方式，用以解決多通道DVR客戶(hù)端普遍存在消耗資源多、反應(yīng)速度慢等問(wèn)題，并設(shè)計(jì)了PManger和SManger兩個(gè)管理類(lèi)，分別用于多通道的播放器與用戶(hù)界面之間以及播放器狀態(tài)的管理。 最后，整個(gè)系統(tǒng)完成了8路模擬音視頻信號(hào)的實(shí)時(shí)采集、編碼、存儲(chǔ)、傳輸控制以及對(duì)系統(tǒng)參數(shù)的遠(yuǎn)程設(shè)置、各通道的音視頻數(shù)據(jù)的接收處理、解碼和多個(gè)通道影像的實(shí)時(shí)預(yù)覽與本地硬盤(pán)數(shù)據(jù)的回放等功能。通過(guò)對(duì)服務(wù)器和客戶(hù)端軟件各個(gè)子模塊和整個(gè)系統(tǒng)的測(cè)試，，以及對(duì)結(jié)果的分析，驗(yàn)證了設(shè)計(jì)的合理性同時(shí)也證實(shí)了本系統(tǒng)軟件具有很好的可靠性與穩(wěn)定性。
[Abstract]:Embedded DVR has been widely used in various industries because of its advantages of low cost, high reliability and high integration. Multi-channel, high-definition and intelligent embedded DVR system has become a new trend of development. On the basis of analyzing the research background of multi-channel DVR system and its specific application requirements, this paper studies and implements the key technologies such as audio and video coding and decoding standards, network transmission of multi-channel audio and video data, and so on, which are involved in the software of multi-channel DVR system. Firstly, the overall scheme of multi-channel DVR system software is designed. The system adopts C / S architecture and is divided into two parts: server software and client software. According to the function, the server software is divided into multi-channel audio and video data acquisition and coding module, data transmission module, storage module and control module. The client software runs in Windows system, which is divided into configuration and management module, multi-channel audio and video data receiving and processing module, decoding module and playing and displaying module. Secondly, the main thread is used to create other threads back to control thread, and then the control thread is used to realize the coordination between the multiple threads of each channel in the management control system. The Basket Manager file storage structure is designed, and the local hard disk storage of multiple channels audio and video data is realized in an orderly and efficient manner. It also provides the index based on time and channel information to automatically search and download data files in local hard disk. Thirdly, the multi-thread concurrent processing technology and the media receiving and caching method based on double buffer queue container are used to solve the problems of multi-channel DVR clients, such as high resource consumption and slow response speed. Two management classes, PManger and SManger, are designed to manage the state of the player and the user interface. Finally, the system completes the real-time acquisition, coding, storage, transmission control of 8 analog audio and video signals, the remote setting of system parameters, and the reception and processing of audio and video data in each channel. Decoding and real-time preview of multi-channel images and playback of local hard disk data. By testing the sub-modules and the whole system of the server and client software, and analyzing the results, the rationality of the design is verified, and the reliability and stability of the system software are also verified.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類(lèi)號(hào)】：TP368.1

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