This paper presents algorithms and techniques to generate recommendations for DVB content. The developed recommendation engine uses metadata which are delivered by the DVB transport stream, the Service Information. Th...
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In this paper, we address the problem of collaborative video caching in mobile ad-hoc networks. We consider network portraying static video server with wired interface to gateway node that is equipped with wireless in...
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ISBN:
(纸本)9781424452385
In this paper, we address the problem of collaborative video caching in mobile ad-hoc networks. We consider network portraying static video server with wired interface to gateway node that is equipped with wireless interfaces, other nodes are requiring access to the video streams that is stored at video server. In order to reduce the average access latency as well as enhance the video accessibility, efficient video caching placement and replacement strategies are crucial at some of the distributed intermediate nodes across the network. Virtual backbone caching nodes will be elected by executing caching placement algorithm after running the routing protocol phase. The simulation results indicate that the proposed collaborative aggregate cache mechanism can significantly improve the video QoS in terms of packet loss and average packet delay.
This paper begins by considering a number of important design questions for a large-scale, widely available, multimedia test collection intended to support long-term scientific evaluation and comparison of content-bas...
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ISBN:
(纸本)9781605587615
This paper begins by considering a number of important design questions for a large-scale, widely available, multimedia test collection intended to support long-term scientific evaluation and comparison of content-based video analysis and exploitation systems. While the collection presented here is not quite web-scale, it is to our knowledge the largest video collection created to date. It is therefore of use in expanding the scale of any evaluation of multimedia collections and systems. Such exploitation systems would include the kinds of functionality already explored within the annual TREC Video Retrieval Evaluation (TRECVid) benchmarking activity such as search, semantic concept detection, and automatic summarization. We then report on our progress in creating such a multimedia collection from publicly available Internet Archive videos with Creative Commons licenses (IACC.1), which we hope will be a useful approximation of a web-scale collection and will support a next generation of benchmarking activities for content-based video operations. We also report on some possibilities for putting this collection to use in multimedia system evaluation. It is the intended that this collection be partitioned and used within the TRECVid 2010 evaluations, and in subsequent years to that. Copyright 2009 ACM.
A new SoC architecture for multimediacontent analysis is implemented with 16mm2 area in 90nm CMOS technology. It focuses on the co-acceleration of computer vision and machine learning algorithms, and two stream proce...
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The increasing ubiquity of networked mobile computing devices such as cell phones and PDAs has created opportunities for the transmission and display of multimediacontent. However, such mobile devices have inherent r...
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ISBN:
(纸本)9781424439775
The increasing ubiquity of networked mobile computing devices such as cell phones and PDAs has created opportunities for the transmission and display of multimediacontent. However, such mobile devices have inherent resource constraints: low network bandwidth, small screen size, limited input methods and low commitment viewing. Therefore, a mobile platform requires systems and applications for information display and access to mitigate these various constraints and further complicates their design. To facilitate access to news video on mobile devices, a coordinated design approach is taken, considering various system perspectives. The goal is to provide a cognitively palatable stream of videos and a seamless and low latency user experience through the use of an adaptive mixed-initiative interface to solicit user relevance feedback, and content retrieval integrated with client-side content aware prefetching. These various components are otherwise usually considered independently in the system design. The experiments suggest that this approach is helpful for recommending news video content on a mobile device, and areas for future investigation are outlined. The contributions of this paper are: (1) a mixed-initiative user interface design for small devices integrated with a content recommendation strategy that harnesses user relevance feedback;(2) coupled with the design and implementation of a content-aware prefetching scheme for videos, using the above mentioned feedback to lower the user perceived latency on the client-end;and (3) overall coordinated system design, with a quantitative evaluation of the tradeoffs between bandwidth, semantic relevance and user perceived latency.
The application of video resources has become extensive, and the demand to the video retrieval is growing intensely. How to access the video clips expected quickly and accurately from the massive video database has be...
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The proceedings contain 143 papers. The topics discussed include: a secure audio steganography approach;a framework for online counter terrorism;object based dynamic separation of duty in RBAC;a roadmap to develop ent...
ISBN:
(纸本)9781424456482
The proceedings contain 143 papers. The topics discussed include: a secure audio steganography approach;a framework for online counter terrorism;object based dynamic separation of duty in RBAC;a roadmap to develop enterprise security architecture;metrics for network forensics conviction evidence;towards development of a trust grid to balance between organization's interests and employee's privacy;signifying ontology complexity for knowledge sharing;on the fly generation of mobile learning structured multimediacontent from the web;towards spatial awareness in recommender systems;low power design for silent pass authentication system;secure biometric system for accessing home appliances via Internet;an access control approach for privacy preserving passive network monitoring;modified slotted ALOHA protocol for RFID tag collisions;detecting errors in digital communications with CRC codes implemented with FPGA;and multiple criteria routing algorithms to increase durability path in mobile ad hoc networks.
In this work we propose a visualisation and access method for exploring a database of raw video material, where the span of information stored can be huge and difficult to understand at a glance. Developed visual mini...
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ISBN:
(纸本)9780769537634
In this work we propose a visualisation and access method for exploring a database of raw video material, where the span of information stored can be huge and difficult to understand at a glance. Developed visual mining tool presents the overview of the hierarchically structured repository in a intuitive way and provides interactive navigational support for the user. Browsing through the un-annotated content is enabled by two complementary interactive methods, a direct selection and a random access, both supported by visual display of the preview nodes. User evaluation aims at demonstrating how the hierarchical random visualisation assists the process of accessing and retrieving content relevant to the user.
In this paper, we explore security considerations on context-aware workflow systems. We also present the Workflow-aware Context-Role Based access Control (WCRBAC) model that is a new access control model suitable for ...
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With the appearance and growing application of open systems such as Internet, delegation is a primary mechanism to enforce access control in such systems. This paper distinguishes two kinds of delegation: authority de...
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