Proceedings of the 6th ACM Multimedia Systems Conference最新文献_第2页

Data set for fall events and daily activities from inertial sensors 来自惯性传感器的跌倒事件和日常活动数据集

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713198

O. Ojetola, E. Gaura, J. Brusey

{"title":"Data set for fall events and daily activities from inertial sensors","authors":"O. Ojetola, E. Gaura, J. Brusey","doi":"10.1145/2713168.2713198","DOIUrl":"https://doi.org/10.1145/2713168.2713198","url":null,"abstract":"Wearable sensors are becoming popular for remote health monitoring as technology improves and cost reduces. One area in which wearable sensors are increasingly being used is falls monitoring. The elderly, in particular are vulnerable to falls and require continuous monitoring. Indeed, many attempts, with insufficient success have been made towards accurate, robust and generic falls and Activities of Daily Living (ADL) classification. A major challenge in developing solutions for fall detection is access to sufficiently large data sets. This paper presents a description of the data set and the experimental protocols designed by the authors for the simulation of falls, near-falls and ADL. Forty-two volunteers were recruited to participate in an experiment that involved a set of scripted protocols. Four types of falls (forward, backward, lateral left and right) and several ADL were simulated. This data set is intended for the evaluation of fall detection algorithms by combining daily activities and transitions from one posture to another with falls. In our prior work, machine learning based fall detection algorithms were developed and evaluated. Results showed that our algorithm was able to discriminate between falls and ADL with an F-measure of 94%.","PeriodicalId":202494,"journal":{"name":"Proceedings of the 6th ACM Multimedia Systems Conference","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130071301","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: 80

Merge and forward: self-organized inter-destination multimedia synchronization 合并和转发:自组织的跨目的地多媒体同步

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713185

Benjamin Rainer, Stefan Petscharnig, C. Timmerer

引用次数: 5

MMT+AVR: enabling collaboration in augmented virtuality/reality using ISO's MPEG media transport MMT+AVR:使用ISO的MPEG媒体传输实现增强虚拟/现实中的协作

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713170

K. Venkatraman, Yuan Tian, S. Raghuraman, B. Prabhakaran, Nhut Nguyen

{"title":"MMT+AVR: enabling collaboration in augmented virtuality/reality using ISO's MPEG media transport","authors":"K. Venkatraman, Yuan Tian, S. Raghuraman, B. Prabhakaran, Nhut Nguyen","doi":"10.1145/2713168.2713170","DOIUrl":"https://doi.org/10.1145/2713168.2713170","url":null,"abstract":"Augmented Reality (AR) and Augmented Virtuality (AV) systems have been used in various fields such as entertainment, broadcasting, gaming [1], etc. Collaborative AR or AV (CAR/CAV) systems are a special kind of such system in which the interaction happens through the exchange of multi-modal data between multiple users/sites. Multiple sensors capture the real objects and enable interaction with shared virtual objects in a customizable virtual environment. Haptic devices can be added to introduce force feedback when the virtual objects are manipulated. These applications are demanding in terms of network resources to support low latency media delivery and media source switching similar to broadcast applications. Enabling real time interaction with multiple modalities with high volume data requires an advanced media transport protocol that supports low latency media delivery and fast media source (channel) switching. To enable such collaboration over a stochastic network like the Internet requires a combination of technologies from data design, synchronization to real time media delivery. MPEG Media Transport (MMT) [ISO/IEC 23008-1] is a new standard suite of protocols designed to work with demanding, real-time interactive multimedia applications, typically in the context of one-to-one and one-to-many communication. In this paper, we identify the augmentations that are required for the many-to-many nature of CAR/CAV applications and propose MMT+AVR as a middle ware solution for use in CAV applications. Through an example CAV application implemented on top of MMT+AVR, we show how it provides efficient support for developing CAV applications with ease.","PeriodicalId":202494,"journal":{"name":"Proceedings of the 6th ACM Multimedia Systems Conference","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122717549","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

SmoothCache 2.0: CDN-quality adaptive HTTP live streaming on peer-to-peer overlays SmoothCache 2.0:基于点对点覆盖的cdn质量自适应HTTP直播

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713182

Roberto Roverso, Riccardo Reale, Sameh El-Ansary, Seif Haridi

引用次数: 19

Scaling virtual camera services to a large number of users 将虚拟摄像机服务扩展到大量用户

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713189

V. Reddy, Ragnar Langseth, H. Stensland, C. Griwodz, P. Halvorsen, Dag Johansen

{"title":"Scaling virtual camera services to a large number of users","authors":"V. Reddy, Ragnar Langseth, H. Stensland, C. Griwodz, P. Halvorsen, Dag Johansen","doi":"10.1145/2713168.2713189","DOIUrl":"https://doi.org/10.1145/2713168.2713189","url":null,"abstract":"By processing video footage from a camera array, one can easily make wide-field-of-view panorama videos. From the single panorama video, one can further generate multiple virtual cameras supporting personalized views to a large number of users based on only the few physical cameras in the array. However, giving personalized services to large numbers of users potentially introduces both bandwidth and processing bottlenecks, depending on where the virtual camera is processed. In this demonstration, we present a system that address the large cost of transmitting entire panorama video to the end-user where the user creates the virtual views on the client device. Our approach is to divide the panorama into tiles, each encoded in multiple qualities. Then, the panorama video tiles are retrieved by the client in a quality (and thus bit rate) depending on where the virtual camera is pointing, i.e., the video quality of the tile changes dynamically according to the user interaction. Our initial experiments indicate that there is a large potential of saving bandwidth on the cost of trading quality of in areas of the panorama frame not used for the extraction of the virtual view.","PeriodicalId":202494,"journal":{"name":"Proceedings of the 6th ACM Multimedia Systems Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131741138","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

Stanford I2V: a news video dataset for query-by-image experiments Stanford I2V:用于图像查询实验的新闻视频数据集

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713197

A. Araújo, J. Chaves, David M. Chen, Roland Angst, B. Girod

引用次数: 27

Video BenchLab: an open platform for realistic benchmarking of streaming media workloads Video BenchLab:一个对流媒体工作负载进行实际基准测试的开放平台

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2723145

Patrick Pegus, E. Cecchet, P. Shenoy

{"title":"Video BenchLab: an open platform for realistic benchmarking of streaming media workloads","authors":"Patrick Pegus, E. Cecchet, P. Shenoy","doi":"10.1145/2713168.2723145","DOIUrl":"https://doi.org/10.1145/2713168.2723145","url":null,"abstract":"In this paper, we present an open, flexible and realistic benchmarking platform named Video BenchLab to measure the performance of streaming media workloads. While Video BenchLab can be used with any existing media server, we provide a set of tools for researchers to experiment with their own platform and protocols. The components include a MediaDrop video server, a suite of tools to bulk insert videos and generate streaming media workloads, a dataset of freely available video and a client runtime to replay videos in the native video players of real Web browsers such as Firefox, Chrome and Internet Explorer. We define simple metrics that are able to capture the quality of video playback and identify issues that can happen during video replay. Finally, we provide a Dashboard to manage experiments, collect results and perform analytics to compare performance between experiments. We present a series of experiments with Video BenchLab to illustrate how the video specific metrics can be used to measure the user perceived experience in real browsers when streaming videos. We also show Internet scale experiments by deploying clients in data centers distributed all over the globe. All the software, datasets, workloads and results used in this paper are made freely available on SourceForge for anyone to reuse and expand.","PeriodicalId":202494,"journal":{"name":"Proceedings of the 6th ACM Multimedia Systems Conference","volume":" 487","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113946732","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: 9

Congestion-aware MAC layer adaptation to improve video teleconferencing over wi-fi 拥塞感知MAC层适应，以改善wi-fi上的视频电话会议

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713173

Wei Chen, Liangping Ma, Chien-Chung Shen

引用次数: 4

YouTube live and Twitch: a tour of user-generated live streaming systems YouTube直播和Twitch:用户生成的直播系统之旅

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713195

Karine Pires, G. Simon

{"title":"YouTube live and Twitch: a tour of user-generated live streaming systems","authors":"Karine Pires, G. Simon","doi":"10.1145/2713168.2713195","DOIUrl":"https://doi.org/10.1145/2713168.2713195","url":null,"abstract":"User-Generated live video streaming systems are services that allow anybody to broadcast a video stream over the Internet. These Over-The-Top services have recently gained popularity, in particular with e-sport, and can now be seen as competitors of the traditional cable TV. In this paper, we present a dataset for further works on these systems. This dataset contains data on the two main user-generated live streaming systems: Twitch and the live service of YouTube. We got three months of traces of these services from January to April 2014. Our dataset includes, at every five minutes, the identifier of the online broadcaster, the number of people watching the stream, and various other media information. In this paper, we introduce the dataset and we make a preliminary study to show the size of the dataset and its potentials. We first show that both systems generate a significant traffic with frequent peaks at more than 1 Tbps. Thanks to more than a million unique uploaders, Twitch is in particular able to offer a rich service at anytime. Our second main observation is that the popularity of these channels is more heterogeneous than what have been observed in other services gathering user-generated content.","PeriodicalId":202494,"journal":{"name":"Proceedings of the 6th ACM Multimedia Systems Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116014129","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: 192

Depth-disparity calibration for augmented reality on binocular optical see-through displays 双目光学透明显示器增强现实的深度视差标定

Proceedings of the 6th ACM Multimedia Systems Conference Pub Date : 2015-03-18 DOI: 10.1145/2713168.2713171

Wanmin Wu, I. Tosic, K. Berkner, N. Balram

引用次数: 3