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Proceedings. IEEE International Conference on Multimedia and Expo最新文献

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Delivery of MPEG video streams with constant perceptual quality of service 提供具有恒定感知服务质量的MPEG视频流
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035429
D. Quaglia, Juan Carlos De Martin
{"title":"Delivery of MPEG video streams with constant perceptual quality of service","authors":"D. Quaglia, Juan Carlos De Martin","doi":"10.1109/ICME.2002.1035429","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035429","url":null,"abstract":"Constant levels of perceptual quality of service is what ideally users of multimedia services expect. In most cases, however, they receive time-varying levels of quality of service. This paper describes a technique to deliver nearly constant perceptual quality of service when transmitting video sequences over differentiated services IP networks. MPEG video packets are transmitted either as low-loss premium packets or as regular best-effort packets depending on their individual perceptual importance. On a frame-by-frame basis, allocation to the premium class is performed depending on the perceptual importance of each macroblock, the desired level of quality of service and the instantaneous network state. The resulting perceptually-based, time-varying use of premium and best-effort network resources delivers nearly constant quality of service to end users and it yields significant higher PSNR values compared to constant allocation of premium bandwidth.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"36 1","pages":"85-88 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87206982","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: 23
A scalable on-demand video delivery paradigm 一个可扩展的按需视频交付范例
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035707
Sujun Ma, Minyou Wu, W. Shu
{"title":"A scalable on-demand video delivery paradigm","authors":"Sujun Ma, Minyou Wu, W. Shu","doi":"10.1109/ICME.2002.1035707","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035707","url":null,"abstract":"Most existing on-demand video services, such as VoD, batching and patching, are not scalable. Although the near VoD service is scalable, it can provide only dozens of videos. A scalable video delivery paradigm, named scheduled video delivery (SVD), is described. In the SVD paradigm, users submit requests with specification of start time. The SVD system combines requests to form multicasting groups and schedules these groups to meet the deadline. SVD is not only scaled to the number of users but also to the number of video objects. Furthermore, SVD can serve more clients with mirroring proxies.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"73 1","pages":"17-20 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85607313","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: 0
Context aware observation of human activities 情境感知观察人类活动
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035930
J. Crowley
{"title":"Context aware observation of human activities","authors":"J. Crowley","doi":"10.1109/ICME.2002.1035930","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035930","url":null,"abstract":"Interactive environments combine perception, action and communication to extend human-computer interaction. We believe that a fundamental challenge for interactive environments is developing models and methods for \"context awareness\". We present an ontology for context awareness for interactive environments. We show how the elements of this ontology correspond to the elements of a software architecture for observing situation and context. Within this framework, context predicts the evolution of the situation, and provides \"meaning\" for objects and events. Context also provides a specification for assembling federations of processes to measure properties, determine relations and detect events.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"36 1","pages":"909-912 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85627443","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: 16
Joint product code optimization for scalable multimedia transmission over wireless channels 针对无线信道上可扩展多媒体传输的联合产品代码优化
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035919
V. Stanković, R. Hamzaoui, Zixiang Xiong
{"title":"Joint product code optimization for scalable multimedia transmission over wireless channels","authors":"V. Stanković, R. Hamzaoui, Zixiang Xiong","doi":"10.1109/ICME.2002.1035919","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035919","url":null,"abstract":"State-of-the-art systems for the transmission of images over wireless channels generate an embedded bitstream and protect it with a product code where the row code is a concatenation of an outer cyclic redundancy check (CRC) code and an inner rate-compatible punctured convolutional (RCPC) code, and the column code is a Reed-Solomon (RS) code. In previous works, the product code was optimized by searching for the best RS protection for each RCPC code rate. We present a local search algorithm that jointly optimizes the RS and the RCPC codes. Experimental results show that our algorithm provides an approximately optimal solution, while its time complexity is much lower than that of the previous works.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"35 1","pages":"865-868 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85739751","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: 21
Real-time rendering of dynamic scenes using wave field synthesis 使用波场合成实时渲染动态场景
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035832
U. Horbach, E. Corteel, Renato S. Pellegrini, E. Hulsebos
{"title":"Real-time rendering of dynamic scenes using wave field synthesis","authors":"U. Horbach, E. Corteel, Renato S. Pellegrini, E. Hulsebos","doi":"10.1109/ICME.2002.1035832","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035832","url":null,"abstract":"Wave field synthesis (WFS) methods, combined with the MPEG-4 multimedia standard, allow us to capture, transmit and reproduce time-varying acoustic scenes, such as theatre events with moving actors in a concert hall, in a perceptually realistic way for groups of listeners in a defined listening area. In this paper, we present related techniques that have been developed within the European project Carrouso.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"13 1","pages":"517-520 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81736078","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
MPEG4 animation clustering for networked virtual environments 网络化虚拟环境下的MPEG4动画聚类
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035794
C. Joslin, N. Magnenat-Thalmann
{"title":"MPEG4 animation clustering for networked virtual environments","authors":"C. Joslin, N. Magnenat-Thalmann","doi":"10.1109/ICME.2002.1035794","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035794","url":null,"abstract":"In this paper we describe a filter that can be used to dramatically reduce the amount of data flowing between clients connected in a networked virtual environment, when using the MPEG4 animation parameters. The approach consists of three parts: real life experimentation and parameter determination, filter construction and filter testing. The real life experiments are used to determine base figures for the filter construction, the filter construction details aspects of design and visual compensation and the final evaluations are used to establish if the filter works correctly, both for data reduction and aesthetically and how well.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"69 1","pages":"365-368 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84163139","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: 5
Multimodal emotion recognition in audiovisual communication 视听交流中的多模态情感识别
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035889
Björn Schuller, M. Lang, G. Rigoll
{"title":"Multimodal emotion recognition in audiovisual communication","authors":"Björn Schuller, M. Lang, G. Rigoll","doi":"10.1109/ICME.2002.1035889","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035889","url":null,"abstract":"This paper discusses innovative techniques to automatically estimate a user's emotional state analyzing the speech signal and haptical interaction on a touch-screen or via mouse. The knowledge of a user's emotion permits adaptive strategies striving for a more natural and robust interaction. We classify seven emotional states: surprise, joy, anger, fear, disgust, sadness, and neutral user state. The user's emotion is extracted by a parallel stochastic analysis of his spoken and haptical machine interactions while understanding the desired intention. The introduced methods are based on the common prosodic speech features pitch and energy, but rely also on the semantic and intention based features wording, degree of verbosity, temporal intention and word rate, and finally the history of user utterances. As further modality even touch-screen or mouse interaction is analyzed. The estimates based on these features are integrated in a multimodal way. The introduced methods are based on results of user studies. A realization proved to be reliable compared with subjective probands' impressions.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"6 1","pages":"745-748 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84323386","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: 55
Bit-rate adapted watermarking algorithm for compressed images 基于比特率的压缩图像水印算法
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035673
L. Guillemot, J. Moureaux
{"title":"Bit-rate adapted watermarking algorithm for compressed images","authors":"L. Guillemot, J. Moureaux","doi":"10.1109/ICME.2002.1035673","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035673","url":null,"abstract":"We propose a combined watermarking and compression algorithm based on the embedding of the mark in the quantized data domain. This approach offers a good tradeoff between robustness, invisibility, embedding capacity and compression bit rate. Furthermore, the extraction process does not need knowledge of the compression parameters, even for attacked images. This leads to a watermarking algorithm which is bit-rate independent.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"69 1","pages":"545-548 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82659845","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: 2
Keystroke recognition for virtual keyboard 虚拟键盘的击键识别
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035630
Jani Mäntyjärvi, Jussi T. Koivumäki, Petri Vuori
{"title":"Keystroke recognition for virtual keyboard","authors":"Jani Mäntyjärvi, Jussi T. Koivumäki, Petri Vuori","doi":"10.1109/ICME.2002.1035630","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035630","url":null,"abstract":"The progress in the field of human-computer interaction with hand held electronic devices, such as, personal digital assistants (PDAs) and mobile phones searches for new interaction techniques. Proximity sensing extends the concept of computer-human interaction beyond actual physical contact with a device. In this paper, a virtual keyboard implementation is presented and keystroke recognition experiments with the keyboard utilizing proximity measurements are described. An infrared (IR) transceiver array is used for detecting the proximity of a finger. Keystroke recognition accuracy is examined with k-nearest neighbor (k-NN) classifier while a multilayer perceptron (MLP) classifier is designed for online implementation. Experiments and results of keystroke classification are presented for both classifiers. The recognition accuracy, which is between 78% and 99% for k-NN classifier and between 69% and 96% for MLP classifier, depends mainly on the location of a specific key on the keyboard area.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"2 1","pages":"429-432 vol.2"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80870229","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: 37
Optimal chaining and implementation for large scale multimedia streaming 大规模多媒体流的最佳链接与实现
Proceedings. IEEE International Conference on Multimedia and Expo Pub Date : 2002-11-07 DOI: 10.1109/ICME.2002.1035799
Te-Chou Su, Shih-Yu Huang, Chen-Lung Chan, Jia-Shung Wang
{"title":"Optimal chaining and implementation for large scale multimedia streaming","authors":"Te-Chou Su, Shih-Yu Huang, Chen-Lung Chan, Jia-Shung Wang","doi":"10.1109/ICME.2002.1035799","DOIUrl":"https://doi.org/10.1109/ICME.2002.1035799","url":null,"abstract":"Chaining is a promising technique in alleviating the network and the server load by serving numbers of clients in a single server stream. In this scheme, each client temporarily stores the ongoing media stream in the client buffer and forwards it to another client with adequate buffering delay to meet the next client playback time. Therefore, the clients request the same video program can be chained together if the client buffer is large enough to bridge clients' playback time. However, existing chaining schemes do not efficiently exploit the client buffer space. In this paper, we present an optimal chaining algorithm to fully utilize the client buffer space and hence minimize the required server streams. Our performance comparison demonstrates that the optimal chaining scheme significantly reduces the server load over the existing chaining schemes. More importantly, the proposed scheme can integrate the streaming proxy into the video chain, which makes the video chain more reliable and flexible in real systems. This paper also presents the prototype implementation of the optimal chaining based video-on-demand system.","PeriodicalId":90694,"journal":{"name":"Proceedings. IEEE International Conference on Multimedia and Expo","volume":"20 1","pages":"385-388 vol.1"},"PeriodicalIF":0.0,"publicationDate":"2002-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83647717","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
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