本文選題：流媒體 + 自適應(yīng)流媒體��； 參考：《中國(guó)科學(xué)院研究生院（沈陽(yáng)計(jì)算技術(shù)研究所）》2014年碩士論文

【摘要】：近年來(lái)人們的生活品質(zhì)不斷提高，對(duì)于高質(zhì)量的視頻和音頻內(nèi)容的需求也越來(lái)越強(qiáng)烈。網(wǎng)絡(luò)設(shè)施的不斷完善，為高質(zhì)量視頻音頻的傳遞提供了基礎(chǔ)。隨著智能手機(jī)和平板電腦的爆發(fā)式興起，人們的上網(wǎng)方式也改變了許多。尤其是3G甚至4G網(wǎng)絡(luò)的投入使用，為人們提供了更便捷的觀看流媒體內(nèi)容的方式，從而進(jìn)一步提高了流媒體服務(wù)在人們生活中的重要性。在這種情況下，傳統(tǒng)的流媒體技術(shù)已經(jīng)無(wú)法滿足人們的需求，基于HTTP的動(dòng)態(tài)自適應(yīng)流媒體技術(shù)成為了研究人員和流媒體服務(wù)商的新選擇。然而，目前對(duì)于碼率選擇算法尚沒(méi)有一致的評(píng)價(jià)標(biāo)準(zhǔn)，國(guó)內(nèi)成熟的DASH解決方案也比較少，因此對(duì)于基于HTTP的動(dòng)態(tài)自適應(yīng)流媒體技術(shù)的研究非常有必要。 本文首先分析了基于HTTP的動(dòng)態(tài)自適應(yīng)流媒體技術(shù)特點(diǎn)和MPEG-DASH標(biāo)準(zhǔn)，深入研究了與該技術(shù)相關(guān)聯(lián)的各方面的內(nèi)容，包括媒體傳輸方式、視頻和音頻編解碼器、封裝格式等技術(shù)。然后從基于HTTP的動(dòng)態(tài)自適應(yīng)碼率選擇算法入手，在研究已有碼率選擇算法的基礎(chǔ)上，通過(guò)分析客戶端運(yùn)行環(huán)境的特點(diǎn)，結(jié)合碼率選擇算法的目標(biāo)，設(shè)計(jì)了一種基于緩沖區(qū)等級(jí)的碼率選擇算法。在此基礎(chǔ)上，設(shè)計(jì)并實(shí)現(xiàn)了一個(gè)基于HTTP的動(dòng)態(tài)自適應(yīng)流媒體系統(tǒng)，對(duì)其中的內(nèi)容準(zhǔn)備、客戶端實(shí)現(xiàn)和網(wǎng)絡(luò)模擬等技術(shù)進(jìn)行了更深入的分析和研究。最后設(shè)計(jì)了多種網(wǎng)絡(luò)場(chǎng)景在該系統(tǒng)上對(duì)碼率選擇算法進(jìn)行了實(shí)驗(yàn)分析，實(shí)驗(yàn)結(jié)果表明，本文提出的碼率選擇算法在帶寬利用和保持視頻質(zhì)量的平滑等方面有很好的效果。
[Abstract]:In recent years, the quality of life has been improved, and the demand for high-quality video and audio content has become more and more intense. The continuous improvement of network facilities provides the basis for the transmission of high-quality video and audio. With the explosion of smartphones and tablets, the way people surf the Internet has changed a lot. Especially the use of 3G and 4G networks provides people with a more convenient way to watch streaming media content, thus further improving the importance of streaming media services in people's lives. In this case, the traditional streaming media technology has been unable to meet the needs of people, the dynamic adaptive streaming media technology based on HTTP has become a new choice for researchers and streaming media service providers. However, there is no consistent evaluation standard for rate selection algorithms and there are few mature DASH solutions in China, so it is necessary to study the dynamic adaptive streaming media technology based on HTTP. In this paper, the characteristics of dynamic adaptive streaming media technology based on HTTP and the MPEG-DASH standard are analyzed, and the contents of this technology are deeply studied, including media transmission mode, video and audio codec, encapsulation format and so on. Then start with the dynamic adaptive rate selection algorithm based on HTTP, on the basis of studying the existing rate selection algorithm, through analyzing the characteristics of the running environment of the client, combining the target of the rate selection algorithm, A rate selection algorithm based on buffer level is designed. On this basis, a dynamic adaptive streaming media system based on HTTP is designed and implemented. Finally, a variety of network scenarios are designed to carry out experimental analysis on the rate selection algorithm. The experimental results show that the proposed rate selection algorithm has a good effect on bandwidth utilization and maintaining smooth video quality.
【學(xué)位授予單位】：中國(guó)科學(xué)院研究生院（沈陽(yáng)計(jì)算技術(shù)研究所）
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TN919.8

【參考文獻(xiàn)】

相關(guān)期刊論文 前6條

1 陳爽文;流媒體技術(shù)綜述[J];北京廣播學(xué)院學(xué)報(bào)(自然科學(xué)版);2003年01期

2 蔡文郁;金心宇;張昱;;基于Linux的網(wǎng)絡(luò)流量控制機(jī)制[J];江南大學(xué)學(xué)報(bào);2006年04期

3 霍龍社;甘震;;移動(dòng)流媒體協(xié)議綜述[J];信息通信技術(shù);2010年04期

4 張宛方,蘇鴻根;基于RTP/UDP/IP協(xié)議實(shí)時(shí)傳輸MPEG-4流媒體文件[J];計(jì)算機(jī)工程與設(shè)計(jì);2004年08期

5 高e，

本文編號(hào)：1867569