Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video最新文献_第2页

Accurate and low-delay seeking within and across mash-ups of highly-compressed videos 准确和低延迟寻求内部和跨混搭的高度压缩的视频

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989266

Bo Gao, Jack Jansen, Pablo César, D. Bulterman

引用次数: 7

A measurement study of resource utilization in internet mobile streaming 互联网移动流媒体资源利用的测量研究

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989250

Yao Liu, Fei Li, Lei Guo, Songqing Chen

{"title":"A measurement study of resource utilization in internet mobile streaming","authors":"Yao Liu, Fei Li, Lei Guo, Songqing Chen","doi":"10.1145/1989240.1989250","DOIUrl":"https://doi.org/10.1145/1989240.1989250","url":null,"abstract":"The pervasive usage of mobile devices and wireless networking support have enabled more and more Internet stream- ing services to all kinds of heterogeneous mobile devices. However, Internet mobile streaming services are challenged by the inherently limited on-device resources, device heterogeneity, and the bulk amount of streaming data. In this paper, focusing on resource utilization and streaming quality on mobile devices, we investigate 10 deployed Internet mobile streaming services that employ client-server, client-proxy-server, and P2P architectures from a client's perspective. We find that (1) existing Internet mobile streaming services mainly use the client-server architecture and commonly adopt burst traffic delivery that can save battery power consumption on mobile devices; (2) to deal with device heterogeneity, some streaming services have already utilized intermediate nodes (often the user's home computer) for online transcoding with a client-proxy-server architecture, but currently they lack power-friendly design for mobile devices; (3) a mobile device in P2P streaming consumes significantly more battery power mainly due to the inevitable P2P control traffic and uploading traffic to other peers. These findings provide us new insights to further optimize Internet mobile streaming in the future.","PeriodicalId":254694,"journal":{"name":"Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127439691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Mobile video streaming using location-based network prediction and transparent handover 使用基于位置的网络预测和透明切换的移动视频流

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989248

Kristian Evensen, Andreas Petlund, Håkon Riiser, Paul Vigmostad, D. Kaspar, C. Griwodz, P. Halvorsen

{"title":"Mobile video streaming using location-based network prediction and transparent handover","authors":"Kristian Evensen, Andreas Petlund, Håkon Riiser, Paul Vigmostad, D. Kaspar, C. Griwodz, P. Halvorsen","doi":"10.1145/1989240.1989248","DOIUrl":"https://doi.org/10.1145/1989240.1989248","url":null,"abstract":"A well known challenge with mobile video streaming is fluctuating bandwidth. As the client devices move in and out of network coverage areas, the users may experience varying signal strengths, competition for the available resources and periods of network outage. These conditions have a significant effect on video quality. In this paper, we present a video streaming solution for roaming clients that is able to compensate for the effects of oscillating bandwidth through bandwidth prediction and video quality scheduling. We combine our existing adaptive segmented HTTP streaming system with 1) an application layer framework for creating transparent multi-link applications, and 2) a location based QoS information system containing GPS coordinates and accompanying bandwidth measurements, populated through crowd-sourcing. Additionally, we use real-time traffic information to improve the prediction by, for example, estimating the length of a commute route. To evaluate our prototype, we performed real-world experiments using a popular tram route in Oslo, Norway. The client connected to multiple networks, and the results show that our solution increases the perceived video quality significantly. Also, we used simulations to evaluate the potential of aggregating bandwidth along the route.","PeriodicalId":254694,"journal":{"name":"Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132063075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 61

GPU-based fast motion estimation for on-the-fly encoding of computer-generated video streams 基于gpu的计算机生成视频流动态编码快速运动估计

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989260

J. Taibo, V. M. Gulías, Pablo Montero, Samuel Rivas

{"title":"GPU-based fast motion estimation for on-the-fly encoding of computer-generated video streams","authors":"J. Taibo, V. M. Gulías, Pablo Montero, Samuel Rivas","doi":"10.1145/1989240.1989260","DOIUrl":"https://doi.org/10.1145/1989240.1989260","url":null,"abstract":"Motion estimation is known to be one of the most expensive tasks in video coding as it is usually performed through blind search-based methods. However, in the particular case of computer-generated video, the rendering stage provides useful information to speed up the process. In this paper, we propose a fast motion estimation algorithm, designed to run completely inside the GPU, to compute the optical flow required to estimate motion vectors at the same time as the graphical rendering process by using high-level information about the objects, viewpoints and effects that define each frame. The proposed method takes advantage of GPU parallelism and avoids bottlenecks in the CPU-GPU communication as the entire rendering and encoding process is performed completely inside the GPU. Avoiding search, motion estimation has very little overhead, negligible when compared with rendering and (the rest of the) video encoding costs while maintaining reasonably good quality. Performance evaluation is done with a CUDA implementation for MPEG-2 video, though results are valid for other formats, and it has been tested as part of the rendering and encoding engine of a real-world system that provides server-side visually-rich interactive applications to lightweight clients equipped with standard MPEG video decoders.","PeriodicalId":254694,"journal":{"name":"Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131249801","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Scalable video transmission: packet loss induced distortion modeling and estimation 可扩展视频传输:丢包引起的失真建模和估计

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989268

Shujie Liu, Chang Wen Chen

{"title":"Scalable video transmission: packet loss induced distortion modeling and estimation","authors":"Shujie Liu, Chang Wen Chen","doi":"10.1145/1989240.1989268","DOIUrl":"https://doi.org/10.1145/1989240.1989268","url":null,"abstract":"To provide enhanced multimedia services for heterogeneous networks and terminal devices, Scalable Video Coding (SVC) has been developed to embed different quality of video in a single bitstream. Similar to classical compressed video transmission, different packets of a video bitstream have different impacts on received video quality. Therefore, distortion modeling and estimation are necessary in designing a robust video transmission strategy under various network conditions. In the paper, we present the first scheme of packet loss induced distortion modeling and estimation in SVC transmission. The proposed scheme is applicable to numerous video communication and networking scenarios in which accurate distortion information can be utilized to enhance the performance of video transmission. One major challenge in scalable video distortion estimation is due to the adoption of more complicated prediction structure in SVC, which makes the tracking of error propagation much more difficult than the non-scalable encoded video. In this research, we tackle such challenge by systematically tracking the propagation of errors under various prediction trajectories. Supplemental information about the compressed video is embedded into data packets to substantially simplify the modeling and estimation. Moreover, with supplemental data of inter prediction information, distortion estimation can be processed without parsing video bitstream which results in much lower computation and memory cost. With negligible effects on the data size, experimental results show that the proposed scheme is able to track and estimate the distortion with very high accuracy. This first ever scalable video transmission distortion modeling and estimation scheme can be deployed at either gateways or receivers because of its low computation and memory cost.","PeriodicalId":254694,"journal":{"name":"Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123413949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Inferring the time-zones of prefixes and autonomous systems by monitoring game server discovery traffic 通过监控游戏服务器发现流量推断前缀和自治系统的时区

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989258

Mattia Rossi, P. Branch, G. Armitage

引用次数: 0

Understanding demand volatility in large VoD systems 了解大型视频点播系统的需求波动

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989252

Di Niu, Baochun Li, Shuqiao Zhao

引用次数: 22

Media-aware networking for SVC-based P2P streaming 基于svc的P2P流媒体的媒体感知网络

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989246

Osama Abboud, Konstantin Pussep, D. Stingl, R. Steinmetz

{"title":"Media-aware networking for SVC-based P2P streaming","authors":"Osama Abboud, Konstantin Pussep, D. Stingl, R. Steinmetz","doi":"10.1145/1989240.1989246","DOIUrl":"https://doi.org/10.1145/1989240.1989246","url":null,"abstract":"There are currently two concurrent trends in the Internet. First, the number of Internet users and their connection speeds are increasing rapidly. Second, Internet-based applications are dominating how people receive information, communicate, and entertain themselves. Therefore, we are witnessing an enormous increase in IP-based multimedia traffic, which is putting an enormous strain on the network. Additionally, router and network virtualization are gaining importance, enabling more intelligent networks. Therefore, we argue that networks should not be merely bystanders to this multimedia revolution. In this paper we present a media-aware network solution based on router virtualization that aims at striking a balance between intelligence and adaptation at the edge and in the core of the network. Using an extensive simulative study, we demonstrate that our media-aware network not only helps in enhancing streaming performance during bottlenecks, but also minimizes the side effects of congestions on user perceived quality, making it a need for future Internet multimedia applications.","PeriodicalId":254694,"journal":{"name":"Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127738683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Celerity: towards low-delay multi-party conferencing over arbitrary network topologies 快速:在任意网络拓扑上实现低延迟多方会议

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989270

Xiangwen Chen, Minghua Chen, Baochun Li, Yao Zhao, Yunnan Wu, Jin Li

{"title":"Celerity: towards low-delay multi-party conferencing over arbitrary network topologies","authors":"Xiangwen Chen, Minghua Chen, Baochun Li, Yao Zhao, Yunnan Wu, Jin Li","doi":"10.1145/1989240.1989270","DOIUrl":"https://doi.org/10.1145/1989240.1989270","url":null,"abstract":"In this paper, we attempt to revisit the problem of multi-party conferencing from a practical perspective, and to rethink the design space involved in this problem. We believe that an emphasis on low end-to-end delays between any two parties in the conference is a must, and the source sending rate in a session should adapt to bandwidth availability and congestion. We present Celerity, a multi-party conferencing solution specifically designed to achieve our objectives. It is entirely Peer-to-Peer (P2P), and as such eliminating the cost of maintaining centrally administered servers. It is designed to deliver video with low end-to-end delays, at quality levels commensurate with available network resources over arbitrary network topologies where bottlenecks can be anywhere in the network. This is in contrast to commonly assumed P2P scenarios where bandwidth bottlenecks reside only at the edge of the network. The highlight in our design is a distributed and adaptive rate control protocol, that can discover and adapt to arbitrary topologies and network conditions quickly, converging to efficient link rate allocations allowed by the underlying network. In accordance with adaptive link rate control, source video encoding rates are also dynamically controlled to present the best possible video quality in arbitrary and unpredictable network conditions. We have implemented Celerity in a prototype system and demonstrate its superior performance in a local experimental testbed.","PeriodicalId":254694,"journal":{"name":"Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125629094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11

Sharing social content from home: a measurement-driven feasibility study 在家分享社交内容:一项衡量驱动的可行性研究

Proceedings of the 21st international workshop on Network and operating systems support for digital audio and video Pub Date : 2011-06-01 DOI: 10.1145/1989240.1989253

M. Marcon, Bimal Viswanath, M. Cha, K. Gummadi

引用次数: 32