發(fā)布時間：2018-04-18 04:27

  本文選題：移動視頻質(zhì)量 + 用戶體驗　； 參考：《北京郵電大學》2015年碩士論文

【摘要】：移動視頻被許多專家認為是移動互聯(lián)網(wǎng)時代最具有前景的應(yīng)用之一。隨著3G等無線網(wǎng)絡(luò)技術(shù)的不斷發(fā)展和廣泛應(yīng)用,移動終端視頻業(yè)務(wù)比以往更受到用戶的關(guān)注,需求量也在逐漸增加。與傳統(tǒng)線網(wǎng)視頻業(yè)務(wù)相比,移動視頻的無線傳輸條件不太穩(wěn)定,更容易產(chǎn)生誤碼；終端的視頻播放效果也更容易受到硬件的限制,這就要求有更適合移動終端的編碼方式。此外不同類型的視頻類型也會對用戶體驗產(chǎn)生不同的影響。以上幾方面因素,對移動終端視頻業(yè)務(wù)在視頻質(zhì)量的評估,和用戶體驗的提升方面都提出了巨大的挑戰(zhàn)。 在移動終端視頻質(zhì)量評價方法的研究中,主要有客觀評價法和主觀評價法。在許多視頻質(zhì)量評價體系的研究中,采用基于服務(wù)質(zhì)量(Quality of Service,以下簡稱QoS)的評價方法。QoS主要包括網(wǎng)絡(luò)的時延、丟包率、抖動等指標,但是這些指標只考慮到網(wǎng)絡(luò)層的性能,是一種客觀評價方法�？陀^評價法中包含的影響因素沒有考慮用戶主觀體驗,并不是一種非常有效的評價方法。而基于用戶體驗質(zhì)量(Quality of Experience,以下簡稱QoE)的評價方法,是以對用戶體驗的影響為基礎(chǔ)來選擇影響因素的。因此QoE評價方法是一種考慮用戶體驗在內(nèi)的主觀評價方法,這種將用戶主觀體驗考慮在內(nèi)的評價方法有助于提高視頻質(zhì)量評價體系的準確性。 本文針對移動終端視頻的特點,圍繞影響用戶體驗的幾類因素,包括無線參數(shù)、終端參數(shù)和編碼參數(shù)以及視頻類型,通過用戶主觀參與體驗和指標自動化測量相結(jié)合的方式,收集各指標影響下的用戶主觀體驗結(jié)果。再通過關(guān)聯(lián)性分析和改進的層次分析法,研究無線參數(shù)、終端參數(shù)和編碼參數(shù)和視頻類型對移動終端視頻質(zhì)量的綜合影響,構(gòu)建移動終端視頻質(zhì)量主觀評價體系。 本文首先介紹移動視頻業(yè)務(wù)發(fā)展現(xiàn)狀。然后以用戶體驗為基礎(chǔ),描述了影響移動終端視頻質(zhì)量的四類指標。接著對移動終端視頻質(zhì)量主觀評價體系進行需求分析、設(shè)計和實現(xiàn)。最后采用多元線性回歸方法對測試數(shù)據(jù)進行分析,構(gòu)建移動終端視頻質(zhì)量評價體系。
[Abstract]:Mobile video is regarded by many experts as one of the most promising applications in the era of mobile Internet.With the continuous development and wide application of wireless network technology such as 3G, mobile terminal video services are paid more attention by users than ever before, and the demand is increasing gradually.Compared with the traditional wire-net video service, the wireless transmission condition of mobile video is less stable, so it is easier to generate bit error. The video playback effect of the terminal is also easier to be restricted by hardware, which requires a more suitable coding method for mobile terminal.In addition, different types of video will also have different effects on the user experience.These factors pose a great challenge to the evaluation of video quality and the improvement of user experience for mobile terminal video services.In the research of mobile terminal video quality evaluation methods, there are objective evaluation method and subjective evaluation method.In the research of many video quality evaluation systems, the QoS evaluation method based on quality of Service (QoS) mainly includes the network delay, packet loss rate, jitter and so on, but these indexes only consider the performance of the network layer.It is an objective evaluation method.Objective evaluation method is not a very effective evaluation method because it does not consider the subjective experience of users.However, the evaluation method based on the quality of user experience (hereinafter referred to as QoS) is based on the influence of user experience to select the influencing factors.Therefore, QoE evaluation method is a subjective evaluation method, which takes user experience into account. This method can help to improve the accuracy of video quality evaluation system.According to the characteristics of mobile terminal video, this paper focuses on several kinds of factors that affect the user experience, including wireless parameters, terminal parameters and coding parameters, as well as video types, and combines the user's subjective participation experience with the automatic measurement of indicators.Collect the user subjective experience results under the influence of each index.Then through the correlation analysis and the improved analytic hierarchy process (AHP), the comprehensive influence of wireless parameters, terminal parameters, coding parameters and video types on the video quality of mobile terminal is studied, and the subjective evaluation system of mobile terminal video quality is constructed.This paper first introduces the development of mobile video services.Then, based on user experience, four kinds of indicators which affect the video quality of mobile terminal are described.Then the subjective evaluation system of mobile terminal video quality is analyzed, designed and implemented.Finally, the multivariate linear regression method is used to analyze the test data, and a mobile terminal video quality evaluation system is constructed.
【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN929.5

【引證文獻】

相關(guān)期刊論文 前1條

1 張帆;楊赫;;泛直播時代體育漫直播的生命力解析[J];當代傳播;2016年06期

相關(guān)碩士學位論文 前1條

1 鄭錫華;咪咕閱讀客戶端用戶體驗評價體系構(gòu)建研究[D];吉林大學;2016年

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本文編號：1766806