content adaptation has been introduced to tailor the same media content to different derived user contexts to allow end users with different access networks, client devices and/or user profiles to access the same info...
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ISBN:
(纸本)0819456543
content adaptation has been introduced to tailor the same media content to different derived user contexts to allow end users with different access networks, client devices and/or user profiles to access the same information source. However, content adaptation also introduces security implications in a content distribution food chain. In this paper, we conduct an in-depth investigation into the potential security issues involved in content adaptation, especially video content adaptation, in multimedia communication systems. We analyze the security requirements in the context of content adaptation. In particular, we address the issue of where to place the security functions and its implications on the security and content adaptation functionality. The general security architectures for the protection of adapted content are categorized and analyzed. Various rationales and implications of some of the most recent multimedia security technologies are investigated under these architectures. The paper provides the readers with an in-depth analysis, a comprehensive overview, and a better understanding of the security issues in a multimedia communication system where adaptation is a necessity.
Due to the disadvantages of annotation based approaches for media object retrieval, there is a broad interest in content-based methods which allow for retrieval by similarity. Despite the plethora of existing work, ac...
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ISBN:
(纸本)1932415645
Due to the disadvantages of annotation based approaches for media object retrieval, there is a broad interest in content-based methods which allow for retrieval by similarity. Despite the plethora of existing work, actual progress in this area can hardly be documented, since performance evaluation for content-based retrieval is still in its infancy. The main reason for this situation is that considerable efforts are needed to design, conduct and analyze cognition experiments for the acquisition of ground truth data. As there is also a lack of publicly available experiment sets and results, performance evaluation of similarity measures is virtually absent. In order to rectify this situation, this article introduces a prototypical framework for the comparison of similarity algorithms for multimedia databases.
The paper is presenting a core idea of the research line, dedicated to tools and utilities for a more friendly Information access. In order to make future multimediasystems smarter, new mechanisms for high-level data...
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Recent research results in the field of multimediacontent Analysis (MCA) have been marked by an abundance of theoretical and algorithmic solutions covering narrow application domains only. In this paper we analyze th...
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ISBN:
(纸本)0863415954
Recent research results in the field of multimediacontent Analysis (MCA) have been marked by an abundance of theoretical and algorithmic solutions covering narrow application domains only. In this paper we analyze this tendency and its origin in more detail and explain why, in our view, this should not be considered "the way to go" in providing easy access to content in multimediasystems and applications of the future. In particular, we concentrate on the case study of digital video, which we see as a straightforward example of multimedia. Through this case study we will discuss the needs and challenges of improving the generic potential of MCA algorithms.
An integrated, reconfigurable, adaptable and open system for mining, indexing and retrieving multimedia information based on a mobile agent technology scheme is presented. The system consists of three integral subsyst...
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ISBN:
(纸本)0780393317
An integrated, reconfigurable, adaptable and open system for mining, indexing and retrieving multimedia information based on a mobile agent technology scheme is presented. The system consists of three integral subsystems, namely the acquisition, the transformation and the distribution modules. Innovative algorithms are used to extract information from web sources, transform it and deliver it to the end users. The system supports efficient content adaptation mechanisms, textual and visual summarization schemes (both sequential and hierarchical), automatic language translation, ontological representation, visual processing and web-based data mining. Experimental analysis on real-life web sites has been performed to test the efficiency of the proposed scheme and compare it with other approaches 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.
This paper presents our latest work oil identifying frame content types for understanding learning media content. In particular, we categorize frames into six classes namely, slide, web-page, instructor, audience, pic...
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ISBN:
(纸本)0780393317
This paper presents our latest work oil identifying frame content types for understanding learning media content. In particular, we categorize frames into six classes namely, slide, web-page, instructor, audience, picture-in-picture and miscellaneous, which make up salient narrative modes in learning videos. Various image and video analysis approaches are explored to achieve this task. Preliminary experiments carried out on three recorded seminars have yielded encouraging results. The identification of fine-grained visual content types can assist us in content understanding, access, browsing and searching of generic learning videos.
Various types of multimedia objects are distributed to peer computers (peers) in peer-to-peer (P2P) overlay networks. An application has to find target peers which can support enough quality of service (QoS) of target...
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ISBN:
(纸本)0769522815
Various types of multimedia objects are distributed to peer computers (peers) in peer-to-peer (P2P) overlay networks. An application has to find target peers which can support enough quality of service (QoS) of target multimedia objects. We discuss acquaintance relations of peers with respect to what objects each peer holds, is allowed to manipulate, and can grant access rights on. We discuss a charge-basedflooding (CBF) algorithm to find target peers based on charge and acquaintance concepts so that areas in P2P overlay networks where target peers are expected to exist are more deeply searched. We evaluate the CBF algorithm compared with a traditional flooding algorithm in terms of the number of messages transmitted in networks.
In this work we propose all intuitive graphic framework for the effective visualization of MPEG-7 low-level features, in the context of classification and annotation of audio-visual documents. This graphic tool is pro...
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ISBN:
(纸本)0780393317
In this work we propose all intuitive graphic framework for the effective visualization of MPEG-7 low-level features, in the context of classification and annotation of audio-visual documents. This graphic tool is proposed to facilitate the access to the content, and to improve a quick understanding of the semantics associated to the considered document. The main visualization paradigm employed consists in representing a 2D feature space in which the shots of the audiovisual document are located. In another window, the same shots are drawn in a temporal bar that gives the users also the information related to the time domain. In the main window, shots with similar content fall near each other, and the proposed tool offers various functionalities for automatically and semi-autonmatically finding and annotating shot clusters in the feature space. The use of the proposed system to analyze the content offew video sequences has shown very interesting capabilities.
This paper presents the experimental design and implementation of Swarm, an integrated and scalable multimedia delivery platform. Swarm offers the adaptability, maintainability and scalability required to effectively ...
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ISBN:
(纸本)0819456535
This paper presents the experimental design and implementation of Swarm, an integrated and scalable multimedia delivery platform. Swarm offers the adaptability, maintainability and scalability required to effectively support diversity in network and client access, including the provisioning for mobile devices. Based upon a topologically aware peer-to-peer substrate, comprised of a distributed set of cooperating nodes and a novel routing schemata, Swarm allows for the effective maintenance of multimedia transactions despite the dynamic properties introduced by wireless and mobile systems. We present the Swarm design, with particular emphasis on how the system maintains content and structural integrity whilst adaptability and dynamic stresses are prevalent. Finally, the experimental implementation of Swarm is discussed together with an analysis of its performance.
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