For efficient access to multimediacontent the media data has to be enriched with additional information about the content's semantic description and functionality, e.g. style sheets for rendering. Current approac...
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ISBN:
(纸本)0769522165
For efficient access to multimediacontent the media data has to be enriched with additional information about the content's semantic description and functionality, e.g. style sheets for rendering. Current approaches for semantic modeling of multimediacontent store the information about the content's semantics and functionality in different files and at different locations, which makes the retrieval and reuse of multimediacontent very difficult. We have proposed Enhanced multimedia Meta Objects (EMMOs) as a new means for semantic multimedia modeling that indivisibly combines multimediacontent with its description and functionality. In this paper, we give an overview of the structure of EMMA, a query algebra, which is adequate and complete with regard to the EMMO model, enables query optimization, allows the integration of ontology knowledge, and supports distributive collaborative authoring.
This paper discusses media streaming using dynamic resource adaptation and update as a means of facilitating Universal multimediaaccess (UMA) [1]: the concept of accessing multimediacontent through a variety of poss...
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ISBN:
(纸本)0780381459
This paper discusses media streaming using dynamic resource adaptation and update as a means of facilitating Universal multimediaaccess (UMA) [1]: the concept of accessing multimediacontent through a variety of possible schemes. As back-ground to our work, the paper summarizes the most common content negotiation approaches and addresses their,facets and problems. MPEG-21 the multimedia framework and its relationship to UMA is then explained. The primary focus of the work is an end-to-end approach to content adaptation which takes advantage of MPEG-21 to facilitate the UMA concept in a media streaming environment. The concept is validated using a media streaming test-bed which provides,for wide adaptation according to broad usage descriptions.
This paper describes two protocols for the secure download of content protection software to mobile devices. The protocols apply concepts from trusted computing to demonstrate that a platform is in a sufficiently trus...
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ISBN:
(纸本)0769522734
This paper describes two protocols for the secure download of content protection software to mobile devices. The protocols apply concepts from trusted computing to demonstrate that a platform is in a sufficiently trustworthy state before any application or associated keys are securely downloaded The protocols are designed to allow mobile devices to receive broadcast content protected by proprietary conditional access applications. They may also be applied in the general case where demonstration of a secure execution environment is required before an application is downloaded.
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.
作者：
Akar, MUniv So Calif
Dept Elect Engn Syst Commun Sci Inst Los Angeles CA 90089 USA
Future wireless systems will support a variety of different services such as voice, data and video, with variable bit rate requirements. In this work, we consider a multimedia code division multiple access (CDMA) syst...
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ISBN:
(纸本)0780386825
Future wireless systems will support a variety of different services such as voice, data and video, with variable bit rate requirements. In this work, we consider a multimedia code division multiple access (CDMA) system for which different rates are represented by varying the processing gain, and study the dynamic properties of distributed power control algorithms using the theory of stability for switched systems and M-matrices. Of particular interest is the stability issue under fluctuations in the desired rates for individual users. We demonstrate that the convergence of a distributed power algorithm can be jeopardized for some cases. Furthermore, we provide conditions to check for possible instabilities and study the degradation in system capacity when such instabilities need to be avoided.
More and more organizations find it more convenient to distribute and collaborate on content through internet than by traditional methods, and the demand for the management and integration of multimediacontent among ...
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Online media server scheduling algorithms in distributed video-on-demand (VoD) systems are studied in this work. We first formulate a general server scheduling problem based on the VoD service model, where the failure...
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ISBN:
(纸本)0819455539
Online media server scheduling algorithms in distributed video-on-demand (VoD) systems are studied in this work. We first formulate a general server scheduling problem based on the VoD service model, where the failure rate and the server-side network bandwidth consumption are identified as two main cost factors in the system. The distributed server scheduler consists of two parts;namely, the request migration scheme and the dynamic content update strategy. By improving the random early migration (REM) scheme, we propose a cost-aware REM (CAREM) scheme to reduce the network bandwidth consumption in the migration process. Furthermore, to accommodate the video popularity and/or client population change, we use the server-video affinity to measure the importance of placing a specific video copy on that server. The dynamic content update strategy uses the server-video affinity metric to reconfigure video copies on media servers. We conduct extensive simulations to measure the performance of proposed algorithms. It can be shown that CAREM together with the dynamic content update strategy can improve the system performance by reducing the request failure rate as well as the server bandwidth consumption.
作者：
Joint, MMoëllic, PAHède, PAdam, PCEA
LIST Atom Energy Agcy France LISTLIC2MMultilingual Multimedia Knowledge Engn F-92265 Fontenay Aux Roses France
The Internet is a continuously expanding source of multimediacontent and information. There are many products in development to search, retrieve, and understand multimediacontent. But most of the current image searc...
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ISBN:
(纸本)0819452017
The Internet is a continuously expanding source of multimediacontent and information. There are many products in development to search, retrieve, and understand multimediacontent. But most of the current image search/retrieval engines, rely on a image database manually pre-indexed with keywords. Computers are still powerless to understand the semantic meaning of still or animated image content. Piria (Program for the Indexing and Research of Images by Affinity), the search engine we have developed brings this possibility closer to reality. Piria is a novel search engine that uses the query by example method. A user query is submitted to the system, which then returns a list of images ranked by similarity, obtained by a metric distance that operates on every indexed image signature. These indexed images are compared according to several different classifiers, not only Keywords, but also Form, Color and Texture, taking into account geometric transformations and variance like rotation, symmetry, mirroring, etc. Form - Edges extracted by an efficient segmentation algorithm. Color - Histogram, semantic color segmentation and spatial color relationship. Texture - Texture wavelets and local edge patterns. If required, Piria is also able to fuse results from multiple classifiers with a new classification of index categories: Single Indexer Single Call (SISC), Single Indexer Multiple Call (SIMC), Multiple Indexers Single Call (MISC) or Multiple Indexers Multiple Call (MIMC). Commercial and industrial applications will be explored and discussed as well as current and future development.
multimedia technology is being developed with a light-speed velocity. The number of different players in the multimedia value and delivery chain is constantly increasing. New multimedia services and applications are e...
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ISBN:
(纸本)0780382714
multimedia technology is being developed with a light-speed velocity. The number of different players in the multimedia value and delivery chain is constantly increasing. New multimedia services and applications are emerging daily and furthermore, they are evolving constantly. However, the speed of the development, mass of information, numerous information providers and consumers, pose a great threat to development of multimedia technology. This can be abridged by adherence to open standards, such as MPEG-21 - multimedia Framework [1]. MPEG-21 is trying to set up an abstract model, which could unambiguously describe the multimediacontent, allow seamless access and delivery of the content including intellectual property management and protection mechanisms. Even more, the abstract model being developed is designed to allow future technologies to be implemented within. MPEG-21 promises to solve several issues within the domain of multimediacontent distribution. Nevertheless this remains to be proven through implementation and wide acceptance. Consequently, the MUFFINS' (multimedia Framework For INteroperability in Secure environments) project 121 has been started to closely follow and monitor the development of the MPEG-21 standard, also implementing an MPEG-21 real-life scenario. Its goals are to prove the MPEG-21 concept and to show its impact on the multimedia technology development, and to monitor and contribute to the development of MPEG-21 standard. In this article, the basic concepts of the MPEG-21 standard and the MUFFINS project are presented.
There has been much desire to access and acquire rich multimedia via any device at anywhere in the way users want to consume. In this paper, we introduce an MPEG-21 Digital Item Adaptation based on pervasive multimedi...
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There has been much desire to access and acquire rich multimedia via any device at anywhere in the way users want to consume. In this paper, we introduce an MPEG-21 Digital Item Adaptation based on pervasive multimedia framework with an intelligent TV remocon and content adaptation for a digital home environment. Our pervasive multimedia framework support a user to seamlessly consume his/her preferred contents on different devices consecutively. The intelligent remocon adopts a user preference learning algorithm in order to make a TV terminal present a personalized EPG to a specific user. So, it becomes possible for the user to easily access and to consume his/her preferred contents from the personalized EPG. The experimental results show that, in our pervasive multimedia computing framework, a user can efficiently maintain context information on content consumption and his/her preference data on TV program contents so that pervasive multimediaaccess and consumption can be possible via any device at anywhere.
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