Bursty traffic which has a high peak rate with respect to the link rate has been shown to be difficult to carry efficiently in ATM networks using currently proposed methods. Bursty traffic is thought likely to occur w...
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ISBN:
(纸本)0819417645
Bursty traffic which has a high peak rate with respect to the link rate has been shown to be difficult to carry efficiently in ATM networks using currently proposed methods. Bursty traffic is thought likely to occur with future multimedia systems. We propose a device known as a Resource Adjunct Processor (RAP) which will allow burst traffic to be carried efficiently and also overcome the problem of cell loss multiplication. The RAP will do this through intelligent buffering of traffic bursts. Simulation test results are presented to demonstrate the efficiency gains possible.
Several key technologies are converging to create the emerging cyberspace. We characterize this convergence process as one of cumulative synthesis and suggest that the network mode of organization is the most appropri...
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Several key technologies are converging to create the emerging cyberspace. We characterize this convergence process as one of cumulative synthesis and suggest that the network mode of organization is the most appropriate for facilitating convergence.
The paper describes the results of using a time and synchronization toolkit in a medical imaging application. The design and architectural principles of the toolkit are summarized. We then present the cineloop synchro...
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In this paper, we investigate the architectural suitability of Cable TV networks for supporting Interactive Video on Demand. We present the existing cable TV structure and comment on the expected future architecture t...
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ISBN:
(纸本)0819417645
In this paper, we investigate the architectural suitability of Cable TV networks for supporting Interactive Video on Demand. We present the existing cable TV structure and comment on the expected future architecture towards which cable TV networks are rapidly evolving. Practical realization of Interactive Video on Demand is in jeopardy because of an unmanageable peak in the subscribers' viewship pattern. We propose that multimedia servers of suitable capacities be installed at strategic locations in the cable TV network and function as temporary caches for multimedia information delivered from metropolitan repositories. We develop techniques for information caching that take into account the network bandwidth and storage constraints, and transform unmanageable peaks in viewers' demand patter to manageable plateaus.
Current approaches for continuous media (CM) file systems focus on scheduling requirements for sessions consisting of single video or audio streams. This paper examines the multimedia delivery problem from the perspec...
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ISBN:
(纸本)0819417645
Current approaches for continuous media (CM) file systems focus on scheduling requirements for sessions consisting of single video or audio streams. This paper examines the multimedia delivery problem from the perspective of hypermedia document servers. Such hypermedia documents can be characterized as a web of nodes, each node containing a set of time-dependent CM and discrete media objects. We first look at a hypothetical user's view of a hypermedia session. We then present two service models, the CM service model and the hypermedia service model, and compare them. We propose a new view of session, a hypermedia session, suitable for scheduling the delivery of hypermedia documents, and present sample scheduling algorithms. This notion of hypermedia session is examined from the standpoint of resource management at the orchestration layer of distributed MM system.
MEHIDA is a multimedia system offering hearing-impaired children an easy and attractive method to communicate with their hearing and deaf peers. It is a TOTAL COMMUNICATION method whose objective is the acquisition of...
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ISBN:
(纸本)0819417645
MEHIDA is a multimedia system offering hearing-impaired children an easy and attractive method to communicate with their hearing and deaf peers. It is a TOTAL COMMUNICATION method whose objective is the acquisition of various forms of communication available to the hearing impaired simultaneously: gesture, speech, dactylology, formal signing, lip reading, reading and writing. Didactic activities and games are used to teach the different means of communication. The approach gives the child the chance to practice the different types of communication. A character has been created in the shape of a pear to assist and guide the child. The pupil identifies with the character at all times, as it explains what the child is being asked to do during each activity. The MEHIDA learning process is divided into six stages: basic learning, prereading and prewriting, syllable, word, simple and complex sentence reading and writing. Each phase establishes a hierarchy of didactic objectives which are the expression of the skills and knowledge to be acquired by the child during the learning process (e.g., learning concepts of similarity) broken down into a series of lower level operational objectives (e.g., select figures of the same shape, size and color).
Inter-media synchronization methods developed until now have been based on syntactic timestamping of video frames and audio samples. These methods are not fully appropriate for the synchronization of multimedia object...
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ISBN:
(纸本)0819417645
Inter-media synchronization methods developed until now have been based on syntactic timestamping of video frames and audio samples. These methods are not fully appropriate for the synchronization of multimedia objects which may have to be accessed individually by their contents, e.g. content-base data retrieval. We propose a content-based multimedia synchronization scheme in which a media stream is viewed as hierarchial composition of smaller objects which are logically structured based on the contents, and the synchronization is achieved by deriving temporal relations among logical units of media object. content-based synchronization offers several advantages such as, elimination of the need for time stamping, freedom from limitations of jitter, synchronization of independently captured media objects in video editing, and compensation for inherent asynchronies in capture times of video and audio.
Owing to widespread user mobility, limited radio resources, and changing network characteristics, supporting multimedia communications in a mobile internetworking environment is a challenging problem. In this paper, w...
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ISBN:
(纸本)9780897918145
Owing to widespread user mobility, limited radio resources, and changing network characteristics, supporting multimedia communications in a mobile internetworking environment is a challenging problem. In this paper, we present an 'adaptive reserved service' framework for use in integrated services networks to support mobile connections carrying multimedia traffic. Reserved bandwidth in the fixed network is dynamically adjusted based on resource availability in the wireless networks. Integrated in the framework are an anticipatory handoff control mechanism which enables fast handoff, and an adaptive link partitioning scheme which enhances handoff success. An accompanying reservation protocol not only facilitates distributed control of mobile connections but also provides network feedback to mobile hosts.
The World-Wide-Web (WWW) has created a new paradigm for online information retrieval by providing immediate and ubiquitous access to digital information of any type from data repositories located throughout the world....
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ISBN:
(纸本)0819417645
The World-Wide-Web (WWW) has created a new paradigm for online information retrieval by providing immediate and ubiquitous access to digital information of any type from data repositories located throughout the world. The web's development enables not only effective access for the generic user, but also more efficient and timely information exchange among scientists and researchers. We have extended the capabilities of the web to provide an improvement to the current paradigm for interacting with inline images, and to allow multidimensional image datasets to be embedded, together with realtime interactive viewers, within WWW documents. Those datasets can then be accessed via our modified version of NCSA's Mosaic WWW browser. This paper will provide a brief background on the World-Wide-Web, and overview of the extensions necessary to support these new data types and a description of an implementation of this approach in a WWW-compliant distributed visualization system.
Future interactive television applications are the up-coming front-end to interactive radio, television, video rental, home shopping, multimedia communication, and information retrieval. The challenge of an interactiv...
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Future interactive television applications are the up-coming front-end to interactive radio, television, video rental, home shopping, multimedia communication, and information retrieval. The challenge of an interactive television system is not that the medium is digital, nor the ability of browsing media resources, nor reception of multiple kinds of media. Users do not need more information than today. The challenge is to provide information which corresponds to users' interests and needs. This paper describes the vision of a multimedia iTV system whose appearance is personally adapted for each user. The concept of personal iTV systems is presented by explaining the task of personalization and the technical fundamentals of intelligent assistance.
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