The explosive growth of the network, end-host performances and their heterogeneities have resulted ever changing advancement and complexity of distributed computing environments. The users in such environment have not...
详细信息
ISBN:
(纸本)9781424403219
The explosive growth of the network, end-host performances and their heterogeneities have resulted ever changing advancement and complexity of distributed computing environments. The users in such environment have not been provided a satisfactory service when they access the required objects. In this paper we focus on adaptive WWW content delivery, which is the most ubiquitous and popular way of information dissemination, primarily in the form of web-server, web-browser interaction. In these applications, we address controlling the Quality of delivery and time of access tradeoff of the WWW contents. We implement this as a httpa protocol, which is an adaptive transcoding methodology for embedded images in web pages, according to available channel bandwidth and other accessibility parameters at the client side. Compared to the conventional form of server side adaptive content delivery proposed in the literature, we propose a hybrid form of adaptation: client side progressive parameter estimation and server side transcoding of images, which is more scalable and flexible. Through experimental results we verify the performance of httpa.
Media consumers who are overwhelmed by multitudinous news content demand a system that would sift through tens or hundreds of broadcast TV channels on a daily basis to capture the most important clips that match users...
详细信息
ISBN:
(纸本)9781424403660
Media consumers who are overwhelmed by multitudinous news content demand a system that would sift through tens or hundreds of broadcast TV channels on a daily basis to capture the most important clips that match users' interests and deliver these personalized clips for easy viewing on a typical TV or home PC. In this paper, we present a personal media alert system that extracts video segments for the interested users. In addition, alerts with pointers to content stored on the home server can be-sent to mobile users who are authorized to access the content at home. To make content sharing feasible and scalable, we also propose a P2P payment scheme that would allow a consumer to have access to media clips aggregated on other consumers' personal media systems.
In a digital home, the copy rights of the high-quality multimediacontent broadcasted from a DVB system need to be protected. However, there is no specification on how to enforce the usage rights of digital content in...
详细信息
ISBN:
(纸本)9781424400850
In a digital home, the copy rights of the high-quality multimediacontent broadcasted from a DVB system need to be protected. However, there is no specification on how to enforce the usage rights of digital content in the DVB standards. As a result, even if the digital content is protected under the conditional access sub-system, end users can still copy and redistribute the digital content once it is descrambled In this paper, we proposed a DRM system for set-top box which supports multimedia Home Platform middleware. The rights of the protected digital content are described using the MPEG-21 Rights Expression Language and broadcasted with the digital content. In the proposed system, the rights are stored in the smart card. The proposed system is highly renewable and extensible. The service providers can integrate this system with their existing broadcast services without additional hardware cost.
This paper describes the content acquisition, indexing and repurposing components of the MIRACLE system. MIRACLE is an ongoing research project at AT&T Labs aimed at creating automated content-based media processi...
详细信息
ISBN:
(纸本)9781424400850
This paper describes the content acquisition, indexing and repurposing components of the MIRACLE system. MIRACLE is an ongoing research project at AT&T Labs aimed at creating automated content-based media processing algorithms and systems to collect, organize, index, mine, and repurpose video and multimedia information. While the retrieval engine and the user interface are the most visible part of the query process, performing the required processing to extract the relevant information and generate the indices for the retrieval engine is the most crucial and challenging component of the overall system. Moreover, the utility of the system is highly dependent on the quality and quantity of the acquired data. We discuss a scalable processing architecture for extracting information that enables efficient searching and browsing of more than 32,000 hours of video programs. We describe a new version of the acquisition system that takes advantage of Personal Video Recorder (PVR) functionality of Windows OS to acquire high-quality video and the associated metadata.
Video Shot boundary detection is a fundamental task in any kind of video content manipulation and retrieval. The area of shot boundary detection has been extensively studied, but achieving highly accurate detection re...
详细信息
ISBN:
(纸本)9781424403660
Video Shot boundary detection is a fundamental task in any kind of video content manipulation and retrieval. The area of shot boundary detection has been extensively studied, but achieving highly accurate detection results remains a challenge. In this paper, we present a novel algorithm for video cut detection. The algorithm is implemented and evaluated on the TRECVID benchmark platform. The experimental results show the effectiveness of the proposed approach. The algorithm provides a clue to the gradual transition detection.
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...
详细信息
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.
This paper provides a brief overview of recent progress of peer-to-peer (P2P) technologies for multimedia applications. We provide an overview of the technical challenges, creative solutions and results related to P2P...
详细信息
ISBN:
(纸本)9781424403660
This paper provides a brief overview of recent progress of peer-to-peer (P2P) technologies for multimedia applications. We provide an overview of the technical challenges, creative solutions and results related to P2P file sharing and content search, and P2P media streaming.
On-demand access to remote multimediacontent via the Internet is becoming increasingly popular. Applications like Video on Demand and News on Demand are increasingly based on structured multimedia presentations, whic...
详细信息
ISBN:
(纸本)1424401976
On-demand access to remote multimediacontent via the Internet is becoming increasingly popular. Applications like Video on Demand and News on Demand are increasingly based on structured multimedia presentations, which give users more options and freedom to interact with the content than just VCR-like operations. For example, authors provide multiple choices for parts of the presentation. and the user can select the most interesting one. Distributing such presentations in hierarchical distribution systems comprised of origin server and proxies can lead to new challenges for proxies since entire presentations are large but only smalls parts of them are actually consumed by each user. We have analyzed this problem for interactive presentations encoded in MPEG-4 and found that we can use the internal structure of MPEG-4 objects to improve performance in a distribution system based on proxy caching.
Advanced antenna technologies and algorithms that have been developed during the last decades are currently being integrated into modern wireless systems. As one of the first standards the wireless metropolitan area n...
详细信息
ISBN:
(纸本)9783800729616
Advanced antenna technologies and algorithms that have been developed during the last decades are currently being integrated into modern wireless systems. As one of the first standards the wireless metropolitan area network IEEE 802.16 provides means to support smart antenna techniques. After an introduction to the medium access control and the physical layer this paper outlines the support of space division multiple access (SOMA) techniques by IEEE 802.16. It shows the influence of intra-cell interference generated by concurrent SOMA transmissions. Finally, the authors present two SOMA-specific scheduling algorithms that are able to cope with the additional interference.
With the proliferation of cameras in handheld devices that allows users to capture still images and videos, providing users with software tools to efficiently manage multimediacontent has become essential. In many ca...
详细信息
ISBN:
(纸本)0819461148
With the proliferation of cameras in handheld devices that allows users to capture still images and videos, providing users with software tools to efficiently manage multimediacontent has become essential. In many cases users desire to organize their personal media content using high-level semantic labels. In this paper we will describe low-complexity algorithms that can be used to derive semantic labels, such as "indoor/outdoor," "face/not face," and "motion/not motion" for mobile video sequences. We will also describe a method for summarizing mobile video sequences. We demonstrate the classification performance of the methods and their computational complexity using a typical processor used in many mobile terminals.
暂无评论