The embedded devices like the mobile Internet continue to pursue new multi-media features with advanced networks. The emerging diversity of the content languages adds a new challenge in addition to the sustained chall...
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ISBN:
(纸本)9781424405732
The embedded devices like the mobile Internet continue to pursue new multi-media features with advanced networks. The emerging diversity of the content languages adds a new challenge in addition to the sustained challenge from the diversity of the execution environments in the embedded environment. The author describes the past three-stage evolution of micro-browsers in the embedded environment. In order to leverage embedded multimedia applications, it is necessary to provide software architecture for a wide range of multimedia applications for the future embedded environment, e.g. mobile handsets, game consoles, and automotive systems. With the sustained focus to the resource constraint, the author proposes an application toolkit framework that enables multimedia applications including browsing, mail clients, stand-alone multimedia players. The toolkit approach provides a footprint optimized multimedia applications in an OS-agnostic manner.
The paper presents the solution adopted to index the information in a multimedia Database Management System dedicated to medical domain, being optimized for medium sized databases. The system automatically processes t...
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ISBN:
(纸本)9781614992622;9781614992615
The paper presents the solution adopted to index the information in a multimedia Database Management System dedicated to medical domain, being optimized for medium sized databases. The system automatically processes the images inserted into database, extracting characteristics as: color histogram, texture, and color regions. The system contains the needed algorithms for images processing and visual content-based retrieval, thus making the client applications less complex. The information is indexed using a single level B-tree structure for text-based data, and using an R-trees structure for multimedia data. The performances of the system are analyzed from the execution time point of view.
When using online services, the time that users wait for the requested content to be downloaded from online servers to local devices can significantly influence user experience. To reduce user waiting time, the conten...
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ISBN:
(纸本)9783319518114;9783319518107
When using online services, the time that users wait for the requested content to be downloaded from online servers to local devices can significantly influence user experience. To reduce user waiting time, the content which are likely to be requested in the future can be predownloaded to the local cache on edge proxies (i.e. edge prefetching). This paper addresses the performance issues of prefetching at edge proxies (e.g. Wi-Fi access Points (APs), cellular base stations). We introduce an AP-based prefetching framework and study the impact of several factors on the benefit and the cost of this framework based on trace-driven simulation experiments. Useful insights which can be used to guide the design of prediction algorithms and edge prefetching systems are gained from our experimental results. First, increasing prediction window size of the prediction algorithms used by mobile applications can significantly reduce user waiting time. Second, the cache size is important to reducing user waiting time before a certain threshold. Third, the ratio of correct predictions to all actual requests (i.e. recall) can reduce user waiting time linearly while the ratio of correct predictions to all predictions (i.e. precision) will influence the traffic cost, so a trade-off should be made when designing a prediction algorithm.
Guaranteed QoS for multimedia applications requires support from the connecting network and the communicating parties. However, in many communications through the Internet, the backbones offer only best-effort service...
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ISBN:
(纸本)0889863806
Guaranteed QoS for multimedia applications requires support from the connecting network and the communicating parties. However, in many communications through the Internet, the backbones offer only best-effort service but are usually over-provisioned and, thus provide sufficient quality. The problems are often in the access networks that may become the bottleneck, especially when they have wireless links. Moreover, current content servers do not support QoS signaling. It would be useful if end hosts could reserve at least local resources at the access network, especially wireless link resources. Additionally, for mobile nodes the continuity of QoS is enhanced if resource signaling can be localized and coupled with mobility management. This paper presents a simple enhancement to RSVP, which allows initial resource reservations and re-reservations due to host mobility to be done locally in an access network.
This paper will start by describing OpenSDRM an open-source framework developed for the IST project MOSES., OpenSDRM is used to control the multimediacontent consumption in conjunction with the new IPMPX MPEG-4 propo...
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ISBN:
(纸本)0769521576
This paper will start by describing OpenSDRM an open-source framework developed for the IST project MOSES., OpenSDRM is used to control the multimediacontent consumption in conjunction with the new IPMPX MPEG-4 proposed standard. This architecture, composed by several building blocks, protects the content flow from creation to final user consumption on a specific device. This paper devotes a special attention to the security aspects of the OpenSDRM processes and functions, describing its communication protocols and message exchanges as well as it introduces the security details about the user's digital wallet.
The significant increment in the number of users that need broadband multimedia system, relative radio resources, and the evolution of the devices has encouraged to search for different methods to manage heterogeneous...
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ISBN:
(纸本)9781509049370
The significant increment in the number of users that need broadband multimedia system, relative radio resources, and the evolution of the devices has encouraged to search for different methods to manage heterogeneous wireless networks. One solution to this problem is to make traffic balancing on heterogeneous networks, so that none of the available networks for a given user will be saturated avoiding performance decay. This paper proposes a novel Multiplicative Exponential Weighting (MEW) approach that manages the access network selection. MEW combines several inputs such as power of the received signal, throughput, packet delay, cost-per-user, the requested type of traffic, and type of device. The obtained results have shown an improvement of 15% in average PSNR, and 20% in terms of delay and throughput, compared to the algorithms presented in the literature.
Despite the great potential demonstrated by the multimedia-rich data in various business applications, none of the prior research has addressed the design of high-quality access to the multimediacontent in heterogene...
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ISBN:
(纸本)1595930590
Despite the great potential demonstrated by the multimedia-rich data in various business applications, none of the prior research has addressed the design of high-quality access to the multimediacontent in heterogeneous wireless networking environment. In this research, we have presented a partial pre-retrieval and buffering scheme to improve various quality of service (QoS) parameters for multimediacontent for in such context. Specifically it addresses the three important QoS parameters namely delay, delay variation, and information loss that directly impact the mobile user's quality of experience indicators. Here we have also presented the analysis of the buffering requirements and the related issues for high-quality access to the multimediacontent in such environment. Results of this research have potential to improve the understanding of these multimedia QoS parameters for ubiquitous wireless infrastructures. Copyright 2005 ACM.
The efficient file searching is an essential feature in P2P systems. While many current approaches use brute force techniques to search files by meta information (file names, extensions or user-provided tags), the int...
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ISBN:
(纸本)9780769531090
The efficient file searching is an essential feature in P2P systems. While many current approaches use brute force techniques to search files by meta information (file names, extensions or user-provided tags), the interest is in implementing techniques that allow content-based search in P2P systems. Recently, clustering techniques have been used for searching text documents to increase the efficiency of document discovery and retrieval. Integrating such techniques into P2P systems is important to enhance searching in P2P file sharing systems. While some effort has been done for content-based searching for text documents in P2P systems, there has been few research work for applying these techniques for multimediacontent in P2P systems. In this paper we introduce two P2P content-based clustering techniques for multimedia documents. These techniques are an adaptation of the existing Class-based Semantic Search (CSS) algorithm for text documents. The proposed algorithms have been integrated into a JXTA-based Overlay P2P platform, and some initial evaluation results are provided. The JXTA-Overlay together with the considered clustering techniques is thus very useful for developing P2P multimedia applications requiring efficient searching of multimediacontents in peer nodes.
The number of terminals that have access to multimediacontent by means of a network is rapidly increasing. More and more, the characteristics of different terminals are increasing in variety. In addition, their users...
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ISBN:
(纸本)0819446416
The number of terminals that have access to multimediacontent by means of a network is rapidly increasing. More and more, the characteristics of different terminals are increasing in variety. In addition, their users can have different preferences. Therefore, the adaptation of multimediacontent to a specific terminal and/or its user has become an important research issue. Such an adaptation is mainly based on two aspects: the description of the multimediacontent and the description of the user environment. Both can be considered as metadata, and can be formatted in an XML language (e.g., MPEG-7 and CC/PP). However, it is not yet clear how we can realize a generic mapping mechanism between two such vocabularies. We feel that such a mechanism is necessary to accomplish a mature content adaptation framework. This paper describes how such a mechanism can be achieved. We attach requirements and preferences of the user environment to specific aspects of the description of multimediacontent. Based on this information, we try to maximize the value of the adapted content, while making it appropriate for the terminal. We also take into account the extensibility of the existing vocabularies we focus on, because this means our mechanism will also be extensible.
The Unmanned Aerial Vehicle (UAV) has become increasingly affordable in the market and has been reduced to smaller sizes, providing an entry level UAV for any beginner. For this paper we have utilized the GoPro action...
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ISBN:
(纸本)9781479972272
The Unmanned Aerial Vehicle (UAV) has become increasingly affordable in the market and has been reduced to smaller sizes, providing an entry level UAV for any beginner. For this paper we have utilized the GoPro action camera as the chosen camera, since DJI has an established gimbal for it and also the fact that the GoPro setup is considered the entry level, which is available to anyone and also produces good quality. Recent research collaboration has identified built heritage in Malaysia with a scope of being built after the nation's independence between 1957 and 1970. Three buildings from this category were shot with the UAV, the National Mosque, Tun Abdul Razak Apartments or famously known as the Pekeliling Flats, and the Rifle Range Flats in Penang. This research will present the utilization of UAV in documenting a built heritage, its challenges in operating the machine, and documenting the sites. This study also briefly describes how aerial videography can be beneficial for visualization artists. In addition to aerial capturing, one aspect of built heritage documentation deals with e-reconstruction including digital drawings, 3D modeling, virtual reality, etc. This can be achieved by using existing visual materials as a reference to generate a virtualized version of the building. In some points visualization artist needs full access to the building, as existing reference images are insufficient. But as mentioned above, sometimes access is limited to terms and conditions mostly related to safety. In this situation one of the best alternatives is to use UAV drones. Aerial videography can be beneficial for visualization artists, first as the reference, and secondly to be combined with virtualized materials for augmented reality purposes as the land where flats were located on, will be covered by newly built skyscrapers in the near future.
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