【摘要】：多媒體通信以及娛樂已經(jīng)越來越成為人們生活中不可分割的一部分。在過去的幾年中,視頻點(diǎn)播(Video-on-Demand)服務(wù)引起了廣泛的關(guān)注,并日益成為人們在互聯(lián)網(wǎng)上最流行的活動之一。與其他形式的互聯(lián)網(wǎng)應(yīng)用相比,視頻點(diǎn)播服務(wù)往往需要支持大規(guī)模的并發(fā)在線用戶,并且需要占用大量的網(wǎng)絡(luò)帶寬。在另一方面,對等網(wǎng)絡(luò)(P2P)技術(shù)迅猛發(fā)展,能夠增強(qiáng)系統(tǒng)的擴(kuò)展性并可支持來自世界各地的數(shù)以萬計的用戶。 P2P技術(shù)可以被應(yīng)用到視頻點(diǎn)播系統(tǒng)中,從而達(dá)到增強(qiáng)系統(tǒng)性能及可擴(kuò)展性的目的。由于視頻點(diǎn)播系統(tǒng)中每個節(jié)目／視頻都有一定數(shù)量的觀看用戶,這些節(jié)點(diǎn)可以通過共享緩沖區(qū)數(shù)據(jù)來減輕服務(wù)器的數(shù)據(jù)負(fù)擔(dān),并一定程度的加快數(shù)據(jù)下載速度。 本文通過對P2P技術(shù)在流媒體網(wǎng)絡(luò)中的應(yīng)用進(jìn)行研究,設(shè)計了一個基于P2P補(bǔ)償?shù)囊曨l點(diǎn)播服務(wù)系統(tǒng)。在系統(tǒng)的客戶端緩存模塊中,本文將客戶的VCR操作作為評價緩存數(shù)據(jù)重要程度的依據(jù)。通過記錄用戶在系統(tǒng)中的VCR行為,可以挖掘出媒體數(shù)據(jù)塊之間的關(guān)聯(lián)關(guān)系,增加前后有關(guān)聯(lián)的媒體數(shù)據(jù)塊的重要度,而減少無關(guān)聯(lián)的媒體數(shù)據(jù)塊的重要程度,從而為緩存替換算法找到了替換依據(jù)。 此外,本文考慮到系統(tǒng)的商業(yè)價值,在P2P補(bǔ)償?shù)囊曨l點(diǎn)播基礎(chǔ)上,為系統(tǒng)加入了廣告插播功能。為了提高廣告插播的用戶接受度與播放效果,本文就廣告的內(nèi)容描述做了分析,并最終使用了一種基于自然模糊語言的廣告內(nèi)容描述方法,從而可以提高廣告相關(guān)度計算的操作性。
[Abstract]:Multimedia communication and entertainment have become an integral part of people's lives. Video on demand (Video-on-Demand) services have attracted wide attention in the past few years and become one of the most popular activities on the Internet. Compared with other forms of Internet applications, VOD services often need to support large-scale concurrent online users and take up a large amount of network bandwidth. On the other hand, peer-to-peer network (P2P) technology has developed rapidly, which can enhance the scalability of the system and support tens of thousands of users from all over the world. P2P technology can be applied to video-on-demand systems. In order to enhance the performance and scalability of the system. Since each program / video in VOD system has a certain number of users, these nodes can reduce the data burden of the server by sharing buffer data, and speed up the data download to a certain extent. In this paper, the application of P2P technology in streaming media network is studied, and a VOD service system based on P2P compensation is designed. In the client cache module, this paper takes the VCR operation of the client as the basis for evaluating the importance of cache data. By recording the user's VCR behavior in the system, we can mine the correlation relationship between the media data blocks, increase the importance of the related media data blocks before and after, and reduce the importance of the uncorrelated media data blocks. Thus, the replacement basis for cache replacement algorithm is found. In addition, considering the commercial value of the system, based on P2P compensated VOD, this paper adds the advertising plugging function to the system. In order to improve the user acceptance and broadcast effect of advertising, this paper analyzes the content description of advertisement, and finally uses a method of advertising content description based on natural fuzzy language. Thus it can improve the maneuverability of advertisement correlation calculation.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：TN948.64

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