[1]王 磊,王 磊,徐力杰.MPEG/DASH中基于码率预测补偿的自适应调度算法[J].南京理工大学学报(自然科学版),2018,42(02):204.[doi:10.14177/j.cnki.32-1397n.2018.42.02.011]
 Wang Lei,Wang Lei,Xu Lijie.Adaptive scheduling algorithm based on bit-rate predictionand compensation in MPEG/DASH[J].Journal of Nanjing University of Science and Technology,2018,42(02):204.[doi:10.14177/j.cnki.32-1397n.2018.42.02.011]
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MPEG/DASH中基于码率预测补偿的自适应调度算法()
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
42卷
期数:
2018年02期
页码:
204
栏目:
出版日期:
2018-04-30

文章信息/Info

Title:
Adaptive scheduling algorithm based on bit-rate predictionand compensation in MPEG/DASH
文章编号:
1005-9830(2018)02-0204-06
作者:
王 磊12王 磊1徐力杰1
南京邮电大学 1.计算机学院,软件学院,网络空间安全学院; 2.江苏省大数据安全与智能处理实验室,江苏 南京 210023
Author(s):
Wang Lei12Wang Lei1Xu Lijie1
1.School of Computer Science; 2.Jiangsu Key Laboratory of Big Data Security and Intelligent Processing,Nanjing University of Posts and Telecommunications,Nanjing 210023,China
关键词:
比特率选择算法 视频传输 算法优化 自适应调度算法
Keywords:
bit-rate selection algorithm video transmission algorithm optimization adaptive scheduling algorithm
分类号:
TP391
DOI:
10.14177/j.cnki.32-1397n.2018.42.02.011
摘要:
动态图像专家组/基于超文本传输协议(HTTP)的动态自适应流媒体(MPEG/DASH)是一种典型的视频自适应传输技术,该技术使得客户端可以根据网络带宽波动情况动态地选择合适码率的视频,从而提高带宽利用率和观看体验。该文面向MPEG/DASH提出了一种基于码率预测和补偿的自适应调度算法。首先预测出后续所需下载分片的码率,然后根据已接收分片的实际码率对预测结果进行补偿修正。该算法降低了预测带宽与实际带宽间的差距,提高了用户观看的体验。实验结果表明,与传统的码率切换算法相比,该文算法能够减少播放卡顿次数和视频码率切换次数。
Abstract:
The moving pictures experts group/dynamic adaptive streaming over hypertext transfer protocol(HTTP)(MPEG/DASH)is a typical video adaptive transmission technology that enables clients to dynamically select the video with the appropriate bit rate based on network bandwidth fluctuations,and then the bandwidth utilization and viewing experience can be improved. In this paper,an adaptive scheduling algorithm based on the rate prediction and compensation is proposed for MPEG/DASH. Firstly,the algorithm predicts the bit rate of subsequent fragment and compensates the result according to the actual bit rate of the received fragments. Then the algorithm reduces the gap between the predicted bandwidth and the actual bandwidth and improves the user viewing experience. The experimental results show that,compared with the traditional rate-switching algorithm,this algorithm can reduce the times of playback pauses and video bit rate switching.

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备注/Memo

备注/Memo:
收稿日期:2017-03-23 修回日期:2017-05-17
基金项目:国家自然科学基金(61502249); 江苏省科技支撑计划(BK20150846); 南京邮电大学科研启动基金(214167); 华为创新基金(HIRP20140116); 江苏省博士后基金(1501041C); 中国博士后基金(2016M590484)
作者简介:王磊(1986-),男,博士,讲师,主要研究方向:网络编码,分布式存储,E-mail:leiwang@njupt.edu.cn。
引文格式:王磊,王磊,徐力杰. MPEG/DASH中基于码率预测补偿的自适应调度算法[J]. 南京理工大学学报,2018,42(2):204-209.
投稿网址:http://zrxuebao.njust.edu.cn
更新日期/Last Update: 2018-04-30