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Proceedings of IEEE International Conference on Multimedia Computing and Systems最新文献

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ATM RendezView: multipoint conferencing on ATM ATM renzview: ATM上的多点会议
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609766
Keith Smith, R. Pretty
{"title":"ATM RendezView: multipoint conferencing on ATM","authors":"Keith Smith, R. Pretty","doi":"10.1109/MMCS.1997.609766","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609766","url":null,"abstract":"ATM RendezView is a prototype application which takes a radical shift in thinking to provide a high quality, distributed, multiparty video conferencing environment. No longer are media stream bridging, mixing and distribution functions resident in a centrally located multipoint control unit (MCU), but are distributed among end-systems. Asynchronous transfer mode (ATM) is instrumental to the success of the prototype since it provides dynamic point-to-multipoint switched virtual connections (SVCs) for media stream distribution, each connection having a negotiable quality of service (QoS). Dynamic point-to-multipoint connections empower each conferee to independently choose particular media streams to be received from other conferees, thus affording the function of switched presence control. Processing intensive functions such as audio mixing and video decoding are off-loaded onto the end-systems which exploit real-time facilities such as threads and real-time scheduling to meet processing deadlines.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129847684","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
PCR-assist CBR for delivering pre-recorded MPEG-2 transport streams pcr辅助CBR提供预录制的MPEG-2传输流
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609798
J. Hsieh, D. Du, Horng-Juing Lee, Tai-Sheng Chang
{"title":"PCR-assist CBR for delivering pre-recorded MPEG-2 transport streams","authors":"J. Hsieh, D. Du, Horng-Juing Lee, Tai-Sheng Chang","doi":"10.1109/MMCS.1997.609798","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609798","url":null,"abstract":"Transmitting compressed variable bit-rate (VBR) video with a traditional constant bit-rate (CBR) service for continuous playback requires a large buffer on the viewer's side. In this paper, we study a new CBR transmission scheme which employs the program clock references (PCR) that are embedded in the MPEG-2 transport streams to reduce the buffer requirement. The scheme is called \"PCR-assist CBR\" (PCBR). The PCBR scheme uses PCRs to examine its transmission regularly. It holds up the transmission if it is ahead of schedule. Based on experimental results with video traces, the PCBR scheme reduces the buffer requirement at the cost of a higher transmission rate.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129960435","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: 7
Improving reliability of distributed VoD servers 提高分布式VoD服务器的可靠性
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609600
M. Billot, V. Issarny, I. Puaut, M. Banâtre
{"title":"Improving reliability of distributed VoD servers","authors":"M. Billot, V. Issarny, I. Puaut, M. Banâtre","doi":"10.1109/MMCS.1997.609600","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609600","url":null,"abstract":"VoD services (video on demand) are characterized by QoS (quality of service) requirements which depend on: the quality of video and sound transmitted to the client; the respect of time constraints associated to video and audio data; the reliability and the accessibility of the service. Much work has been done in order to provide system support aimed at meeting reliability requirements in distributed VoD servers. However, existing proposals focus on the treatment of failures of the network and disk, and do not integrate the consequence of CPU failures. To deal with this issue, the authors have previously proposed a resource reservation model that integrates reliability requirements. They customize the resource manager of a distributed VoD server in order to take advantage of the large set of resources (disks and CPUs) to enhance the server's reliability. The proposed available-resource manager implements a load balancing strategy which provides reliability on demand and guarantees the server's accessibility. The paper detail the corresponding algorithm and presents results proving that their load balancing strategy reduces the cost of reliability in terms of resource consumption.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130162389","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
Supporting content-based queries over images in MARS 支持在MARS中对图像进行基于内容的查询
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609791
S. Mehrotra, Y. Rui, Michael Ortega-Binderberger, Thomas S. Huang
{"title":"Supporting content-based queries over images in MARS","authors":"S. Mehrotra, Y. Rui, Michael Ortega-Binderberger, Thomas S. Huang","doi":"10.1109/MMCS.1997.609791","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609791","url":null,"abstract":"While advances in technology allow us to generate, transmit and store large amounts of digital images, video and audio, research in the indexing and retrieval of multimedia information is still at its infancy. To address the challenges in building an effective multimedia database system, we have built the Multimedia Analysis and Retrieval System (MARS) prototype. This paper summarises the retrieval subsystem of MARS and its support for content-based queries over image features. Content-based retrieval techniques have been extensively studied for textual documents in the area of automatic information retrieval. Our objective in MARS is to exploit these existing techniques for content-based retrieval over images and multimedia databases.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128927868","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: 156
Toward a generic spatial/temporal computation model for multimedia presentations 面向多媒体演示的通用空间/时间计算模型
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609597
T. Shih, A. Y. Chang
{"title":"Toward a generic spatial/temporal computation model for multimedia presentations","authors":"T. Shih, A. Y. Chang","doi":"10.1109/MMCS.1997.609597","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609597","url":null,"abstract":"Relations among temporal intervals can be used to assist the automatic generation of multimedia presentations. The authors analyze the domains of interval temporal relations. A set of algorithms is proposed to derive reasonable relations between intervals. Possible conflicts in the user specification are firstly detected and eliminated. The mechanism then constructs partial order relations among temporal intervals before the presentation time chart is built. The algorithm is extended for objects in an arbitrary n-dimensional space. Thus, presentation layouts in 2-D space, or virtual reality object representations in 3-D space can be constructed. They use their algorithms to design a reasoning system that generates the schedule and layout of multimedia presentations.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132488935","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: 14
Musical design patterns: an example of a human-centered model of interactive multimedia 音乐设计模式:以人为中心的交互式多媒体模式的一个例子
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609564
Jan O. Borchers, M. Mühlhäuser
{"title":"Musical design patterns: an example of a human-centered model of interactive multimedia","authors":"Jan O. Borchers, M. Mühlhäuser","doi":"10.1109/MMCS.1997.609564","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609564","url":null,"abstract":"Most multimedia data today is sampled and quantized from analog sources. Even with sophisticated recognition and indexing techniques, it remains difficult to associate human-centered, semantic content and structural information with it. This prohibits many desirable, more advanced interaction metaphors with the data than simple replay. We propose that a human-centered model of both multimedia data and suitable metaphors to directly and instantaneously interact with it is crucial to the design of more interactive and \"multimedia-aware\" system and application architectures. We show how we implemented such a model for the media type \"music\" in the WorldBeat system, a highly successful interactive computer-based music exhibit in the Ars Electronica Center in Lint, Austria. The system uses a high-level semantic concept of musical information called \"musical design patterns\". Interaction with this representation, like spontaneous, computer-supported improvisation, is supported in a novel way, using just a pair of infrared batons to control the entire exhibit. The system and its semantic model offer a technologically and artistically innovative approach that should be of interest to multimedia researchers as well as educators, artists and performers.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125458863","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: 4
QoS negotiation and resource reservation for distributed multimedia applications 分布式多媒体应用的QoS协商和资源预留
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609619
W. Fiederer, K. Rothermel, G. Dermler
{"title":"QoS negotiation and resource reservation for distributed multimedia applications","authors":"W. Fiederer, K. Rothermel, G. Dermler","doi":"10.1109/MMCS.1997.609619","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609619","url":null,"abstract":"Distributed multimedia applications require negotiation of quality of service (QoS) and resource reservation for application components and communication links. QoS negotiation is a balancing process between the QoS specified by a client, the resource capabilities of the distributed system and the functional capabilities of the distributed application. It requires application level QoS descriptions and an end-to-end view spanning the distributed application. XNRP, introduced in the paper, is a protocol meeting these requirements. XNRP performs negotiation based on client specified QoS value ranges and is independent of application level QoS semantics. It allows QoS negotiation and resource reservation in three phases and supports arbitrarily interconnected flowgraphs of application components. Performance analysis of the XNRP implementation shows its applicability to complex settings.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122511414","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: 29
A scalable security architecture for multimedia communication standards 多媒体通信标准的可扩展安全体系结构
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609807
T. Kunkelmann, R. Reinema
{"title":"A scalable security architecture for multimedia communication standards","authors":"T. Kunkelmann, R. Reinema","doi":"10.1109/MMCS.1997.609807","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609807","url":null,"abstract":"In multimedia conferencing systems the need for confidentiality gains in importance. This goal can be achieved by encryption. In real-time video processing systems there is a special need for partial data encryption. Existing methods and their weaknesses are investigated. We present a new approach for partial encryption of video data, which allows a security level of nearly every granularity. It can be applied to all JPEG-based video compression methods.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131284126","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: 35
Cooperative QoS management for multimedia applications 多媒体应用协同QoS管理
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609609
S. Fischer, A. Hafid, G. Bochmann, H. Meer
{"title":"Cooperative QoS management for multimedia applications","authors":"S. Fischer, A. Hafid, G. Bochmann, H. Meer","doi":"10.1109/MMCS.1997.609609","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609609","url":null,"abstract":"Quality of service (QoS) management is becoming more and more important, especially in networks where many applications are competing for a limited number of resources. As these applications become more complex (consider e.g. multiparty multimedia applications), the number of options for QoS management increases, leading to more complex decision processes. The authors propose an approach for cooperative QoS management, where application-oriented QoS agents are distributed throughout the network and the end systems, communicating with each other. This distributed management system tries to guarantee the QoS level negotiated with the users, at the same time optimizing resource usage. The advantages of distributing the management process are: (i) an easier and more precise localization of the cause of QoS problems, (ii) better knowledge of local situations, (iii) a lower complexity for a single QoS agent and (iv) an increase in possible actions. They describe management procedures for QoS negotiation, adaptation and renegotiation.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131506305","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: 46
Experiments in simple one-dimensional lossy image compression schemes 实验在简单的一维有损图像压缩方案
Proceedings of IEEE International Conference on Multimedia Computing and Systems Pub Date : 1997-06-03 DOI: 10.1109/MMCS.1997.609782
Joseph Modayil, Howard Cheng, Xiaobo Li
{"title":"Experiments in simple one-dimensional lossy image compression schemes","authors":"Joseph Modayil, Howard Cheng, Xiaobo Li","doi":"10.1109/MMCS.1997.609782","DOIUrl":"https://doi.org/10.1109/MMCS.1997.609782","url":null,"abstract":"The paper examines some one-dimensional lossy image compression schemes. To perform one-dimensional compression, an image is scanned into a one-dimensional array which is then compressed. Three types of scanning are considered: raster scan, Hilbert scan, and binary scan. Hilbert and binary scan are found to outperform raster scan. The methods considered for compression are integer wavelet transforms, a piecewise approximation with triggers (PAT) procedure introduced by Walach and Karnin (1986), and a modified PAT algorithm (MPAT). Wavelets outperform MPAT in compression, and MPAT in turn outperforms PAT; however, MPAT and PAT are computationally far simpler than wavelet transforms.","PeriodicalId":302885,"journal":{"name":"Proceedings of IEEE International Conference on Multimedia Computing and Systems","volume":"517 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1997-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133337359","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
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