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检索条件"任意字段=Conference on Multimedia Computing and Networking 1996"

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CONTENT-BASED INTER-MEDIA SYNCHRONIZATION

CONTENT-BASED INTER-MEDIA SYNCHRONIZATION

引用

conference on multimedia computing and networking 1995

作者： OH, DY KUMAR, SS RANGAN, PV UNIV CALIF SAN DIEGO DEPT COMP SCILA JOLLACA 92093

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.

关键词： multimedia Video Composites Boron Databases Analytical research Computer engineering Computer science Image segmentation Lanthanum

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MEHIDA - AN INTELLIGENT multimedia TUTORING SYSTEM FOR THE HEARING-IMPAIRED

MEHIDA - AN INTELLIGENT MULTIMEDIA TUTORING SYSTEM FOR THE H...

引用

conference on multimedia computing and networking 1995

作者： ALONSO, F DEANTONIO, A FUERTES, JL MONTES, C UPM FAC INFORMATE-28660 MADRIDSPAIN

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).

关键词： Telecommunications computing systems Intelligence systems Laser induced plasma spectroscopy Control systems multimedia Associative arrays Visualization Databases Video

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EMBEDDING INTERACTIVE EXTERNAL PROGRAM OBJECTS WITHIN OPEN-DISTRIBUTED HYPERMEDIA DOCUMENTS

EMBEDDING INTERACTIVE EXTERNAL PROGRAM OBJECTS WITHIN OPEN-D...

引用

conference on multimedia computing and networking 1995

作者： DOYLE, MD ANG, CS MARTIN, DC EOLAS TECHNOL INC OAKLANDCA 94621

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.

关键词： Visualization Internet Computer programming computing systems Image segmentation Blood Liver multimedia Volume visualization Knowledge management

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ADDRESSING THE REAL-TIME SYNCHRONIZATION REQUIREMENTS OF multimedia IN AN OBJECT-ORIENTED FRAMEWORK

ADDRESSING THE REAL-TIME SYNCHRONIZATION REQUIREMENTS OF MUL...

引用

conference on multimedia computing and networking 1995

作者： PAPATHOMAS, M BLAIR, GS COULSON, G ROBIN, P UNIV LANCASTER DEPT COMPDISTRIBUTED MULTIMEDIA RES GRPLANCASTER LA1 4YRENGLAND

ISBN: (纸本)0819417645

It is now recognized that object-oriented techniques are well suited to the design and implementation of multimedia applications. Objects may be used to encapsulate the great variety of hardware devices used in such applications and to abstract over the details of low level interfaces. Furthermore, complex media processing algorithms, such as compression/decompression, may be encapsulated within objects making them easier to reuse across applications. Real-time synchronization is also an essential aspect of multimedia which arises from the inherently temporal properties of media such as audio and video. In this paper, we propose a set of programming abstractions and an approach to address real-time synchronization requirements in an object-oriented framework. In our approach, active objects encapsulate media processing activities. Real-time synchronization is maintained by reactive objects that control the execution of media processing objects. A key advantage of our approach is that it allows the separation of synchronization from the behavior of objects. Both objects and synchronization specifications may be reused in different contexts. In addition, the approach enables the specification of real-time synchronization in a high-level notation that has proven well suited to this task.

关键词： multimedia SYNCHRONIZATION SYNCHRONOUS LANGUAGE ACTIVE OBJECTS REACTIVE OBJECTS CONCURRENCY

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ACTIVATION SET - AN ABSTRACTION FOR ACCESSING PERIODIC DATA STREAMS

ACTIVATION SET - AN ABSTRACTION FOR ACCESSING PERIODIC DATA ...

引用

conference on multimedia computing and networking 1995

作者： HELBIG, T NOUREDDINE, S ROTHERMEL, K UNIV STUTTGART IPVRD-70565 STUTTGARTGERMANY

ISBN: (纸本)0819417645

In distributed multimedia applications time-dependent data streams are conveyed and processed under real-time conditions. The timely accurate activation of the stream handlers processing the data units of streams requires deriving their scheduling times from the temporal properties of the data streams and the amount of data that is processed in each activation. In this paper, we propose the activation set concept as a data access abstraction to consume sets of data units from a group of time-dependent data streams having synchronization relationships among each other. The concept supports the consumption of multiple periodic data streams of different rates as well as the integration of aperiodic streams. It is shown how scheduling times of activations are derived from the streams' temporal properties and the requested amount of data. When a stream handler is activated, data units of the streams are selected for consumption according to synchronization relationships and tolerated skew bounds. The effects of the approach on delays are discussed in the context of a rate-monotonic scheduling algorithm. The concept provides a configurable interface to groups of time-dependent data streams which, for example, is required when nixing streams. It is widely applicable in multimedia system architectures that allow for configuration of distributed multimedia applications based on interconnected stream handling components.

关键词： multimedia TIME-DEPENDENT DATA STREAMS SYNCHRONIZATION DATA ACCESS ACTIVATION SET SCHEDULING

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AN ILLUSTRATIVE EXAMPLE ON DESIGNING AND EVALUATING MULTI-MEDIA SYSTEMS

AN ILLUSTRATIVE EXAMPLE ON DESIGNING AND EVALUATING MULTI-ME...

引用

conference on multimedia computing and networking 1995

作者： CHATTERJEE, S STROSNIDER, J CARNEGIE MELLON UNIV DEPT ELECT & COMP ENGNPITTSBURGHPA 15213

ISBN: (纸本)0819417645

This paper illustrates a step-by-step approach to designing an example multi-media system using our periodic pipelined design and evaluation framework. The periodic pipelined framework provides a systematic approach to designing scalable, distributed heterogeneous systems whose timing properties can be strictly controlled and analyzed. The approach exploits the natural pipelined execution pattern found in a large number of continuous-data applications executing over heterogenous distributed resources. This paper illustrates how to model the example multi-media system using the framework and how to make design decisions such that the system's end-to-end timing requirements can be met. Specifically, we focus on how to assign pipeline stage rates to model the specific set of signal processing rates required in the example system. Finally, this paper provides timing analysis results and makes explicit the fundamental trade-offs in designing this example system. © 1995 SPIE. All rights reserved.

关键词： PERIODIC PIPELINE DESIGN SCALABLE multimedia SYSTEMS FORMAL FRAMEWORK HETEROGENEOUS RESOURCES

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DESIGN ISSUES FOR FLOOR CONTROL PROTOCOLS

DESIGN ISSUES FOR FLOOR CONTROL PROTOCOLS

引用

conference on multimedia computing and networking 1995

作者： DOMMEL, HP GARCIALUNAACEVES, JJ UNIV CALIF SANTA CRUZ BASKIN CTR COMP ENGN & INFORMAT SCISANTA CRUZCA 95064

ISBN: (纸本)0819417645

Floor control allows users of networked multimedia applications to remotely share resources like cursors, data views, video and audio channels, or entire applications without access conflicts. Floors are mutually exclusive permissions, granted dynamically to collaborating users, mitigating race conditions and guaranteeing fair and deadlock- free resource access. Although floor control is an early concept within computer-supported cooperative work, no framework exists and current floor control mechanisms are often limited to simple objects. While small-scale collaboration can be facilitated by social conventions, the importance of floors becomes evident for large-scale application sharing and teleconferencing orchestration. In this paper, the concept of a scalable session protocol is enhanced with floor control. Characteristics of collaborative environments are discussed, and session and floor control are discerned. The system's and user's requirements perspectives are discussed, including distributed storage policies, packet structure and user-interface design for floor presentation, manipulation, and triggering conditions for floor migration. Interaction stages between users, and scenarios of participant withdrawal, late joins, and establishment of subgroups are elicited with respect to floor generation, bookkeeping, and passing. An API is proposed to standardize and integrate floor control among shared applications. Finally, a concise classification for existing systems with a notion of floor control is introduced.

关键词： COMPUTER SUPPORTED COOPERATIVE WORK COLLABORATIVE multimedia computing CONCURRENCY CONTROL OF SHARED multimedia OBJECTS (FLOOR CONTROL) MEDIA AND USER INTERACTION

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A SEMANTIC DATA MODEL FOR EMBEDDED IMAGE INFORMATION

A SEMANTIC DATA MODEL FOR EMBEDDED IMAGE INFORMATION

引用

conference on multimedia computing and networking 1995

作者： GRIFFIOEN, J YAVATKAR, R MEHROTRA, R UNIV KENTUCKY DEPT COMP SCILEXINGTONKY 40506

ISBN: (纸本)0819417645

Historically, database systems have provided convenient methods for obtaining specific information from a large repository of data. All the information was readily available and the mapping between the data and its semantics was straightforward. However, the increasing availability of multimedia data sources introduces new data forms for which the mapping between data and its semantics is not clear. In particular non-alphanumeric data such as images, videos, graphs, charts, etc. contain large amounts of information that are difficult to quantify in a complete and concise fashion. Moreover, the semantic information contained in such data is often application specific. This paper addresses the problem of embedded semantic information. The basic idea is the integration of a data processing component into data modeling systems to allow additional (possibly application dependent) information to be extracted. This paper proposes a new object-oriented data modeling approach, shows how such a design can be applied to a pictorial information system, and describes a prototype system with an example application. © 1995 SPIE. All rights reserved.

关键词： IMAGE INFORMATION MODELING IMAGE DATA MANAGEMENT IMAGE DATABASES OBJECT-ORIENTED MODELING multimedia INFORMATION MANAGEMENT

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PUTTING THE MEDIA INTO HYPERMEDIA

PUTTING THE MEDIA INTO HYPERMEDIA

引用

conference on multimedia computing and networking 1995

作者： BEITNER, ND GOBLE, CA HALL, W UNIV SOUTHAMPTON DEPT ELECTR & COMP SCISOUTHAMPTON SO17 1BJENGLAND

ISBN: (纸本)0819417645

This paper discusses the issues involved in putting the media into a hypermedia system. The main argument of the paper is that to-date media representation and underlying link strategies have been too closely tied together in the move from hypertext to hypermedia. We argue that it is necessary to separate the issues of media from link structure, and we present a model which solves some of the problems of genuine media integration in a hypermedia system. At the same time the model provides support for the creation of links between data of different media types in a conceptually meaningful way. The paper describes the design of Microcosm++, and object oriented extensible service-based architecture for building consistent integrated hypermedia systems. It is based on the Microcosm hypermedia system which was developed at Southampton. The current implementation of Microcosm++ demonstrates the flexibility of object-based services for making hypermedia more viable in a working environment. The approach described reduces authoring effort significantly while at the same time increasing the integrity of the link structures and providing a unified model for media integration.

关键词： Video multimedia Databases Systems modeling Visualization Data modeling Human-machine interfaces Navigation systems Telecommunications Image segmentation

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RESOURCE AND CONNECTION ADMISSION CONTROL IN REAL-TIME TRANSPORT PROTOCOLS

RESOURCE AND CONNECTION ADMISSION CONTROL IN REAL-TIME TRANS...

引用

conference on multimedia computing and networking 1995

作者： GUO, SZ GEORGANAS, ND UNIV OTTAWA DEPT ELECT ENGNMULTIMEDIA COMMUN RES LABOTTAWAON K1N 6N5CANADA

ISBN: (纸本)0819417645

Support for real-time multimedia applications is becoming an essential requirement for future high-speed networks. Many of these real-time applications will require guaranteed quality of service (QoS) such as a bound on the maximum message delay and/or on the maximum message loss rate. This poses an exciting challenge to the high speed transport protocol design and implementations. In this paper, we study the resource and admission control algorithms for real-time transport connections, and give a necessary and sufficient condition for the schedulabiltiy of n real-time transport connections at a destination host under deadline scheduling policy for deterministic guarantees of QoS. We propose the deadline scheduling with interrupt points policy, under which we give a necessary and sufficient condition of the schedulability of n real-time transport connections for statistical guarantees of QoS. These necessary and sufficient conditions form the mathematical basis for the QoS guarantees in transport communication services. Based on the necessary and sufficient conditions, we give the connection admission control algorithms for deterministic guarantees and statistical guarantees of QoS respectively. We also calculate the buffer space needed for each real-time transport connection. Our results could be applied to other fields as well, such as real-time operating systems.

关键词： REAL-TIME SCHEDULING CONNECTION ADMISSION CONTROL QUALITY OF SERVICE HIGH SPEED TRANSPORT PROTOCOLS DEADLINE SCHEDULING multimedia COMMUNICATIONS

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