A Multimedia World Wide Web Based Conference Minute System for Group Collaboration

In this paper, we propose a World Wide Web based conference minute system which preserves important information in the conference as web documents and maintains hyperlinks to related minutes to accelerate the progress of the project. This system, based on our Java application sharing framework, provides capabilities to record and replay the audio/video data of the video conference and operations of the shared applications used in the meeting in a synchronous manner. Through the hyperlinks, people can quickly understand the logic flow of every meeting held in the project duration and select any part in a meeting for replay to know what has actually happened. Furthermore, when a new meeting is held, a minute template is generated by the system to inherit the hyperlinks from its predecessors. Other related minutes and the execution status of the resolutions in the project can be easily accessed through the hyperlinks between them. Through the help of the system, execution of the project and management of its organizational memory could be easily achieved to increase the productivity of the collaborative groups with geographically dispersed members.     

基于动态网页技术的多媒体演示系统

介绍一种网络多媒体演示系统,这种系统可以让用户轻松地设计自己的多媒体演示,而不再受演示技术或演示时间地点的限制.系统由三部分组成：用户接口－－－包括时间规格编辑器,空间规格编辑器,多媒体物件接口;演示接口;知识库.系统中还包括一个动态网页生成器.文章给出了一个基于Allen定律的演示算法,用该算法实现了多媒体物件的同步显示.     

演示文稿中嵌入多媒体素材

用PowerPoint制作多媒体作品或教学课件,要加入多媒体素材(动画、声音和电影)时,若用链接方式,作品拿到另一地方使用时,常会因遗忘带上多媒体素材文件,或改变了原链接位置而不能正常播放。本文给出了多媒体素材嵌入演示文稿中方法,使作品或课件只有一个文件,以避免前述的情况发生。     

多媒体公司网站制作

简要回顾了多媒体发展过程,由传统媒体发展到第四媒体。从多媒体网站应运而生和制作角度出发,系统研究并阐述如何使用Macromedia公司Dreamweaver 8建立多媒体公司网站网页、管理站点和发布过程。同时还详细介绍了多媒体技术及发展概况、超文本标记语言HTML和JavaScript等多媒体网页编辑语言的概念及在制作页面方面的使用。由于多媒体网页是由较为丰富的文字、图像、音频、视频和动画集成的媒体,所以也介绍了与其相关文件的结构及属性。     

多媒体公司网站制作

简要回顾了多媒体发展过程，由传统媒体发展到第四媒体。从多媒体网站应运而生和制作角度出发，系统研究并阐述如何使用Macromedia公司Dreamweaver8建立多媒体公司网站网页、管理站点和发布过程。同时还详细介绍了多媒体技术及发展概况、超文本标记语言HTML和JavaScript等多媒体网页编辑语言的概念及在制作页面方面的使用。由于多媒体网页是由较为丰富的文字、图像、音频、视频和动画集成的媒体．所以也介绍了与其相关文件的结构及属性     

From Database to Web Multimedia Documents

This paper deals with the integration of multimedia and database technologies in order to describe web multimedia documents. We present a middleware to seamlessly handle database accesses as well as compositional, spatial and temporal constraints related to data presentation. Our approach is based on the concept of Templates. A template is a logical presentation unit that merge database queries with layout specifications. We choose an XML and SMIL approach to implement template. Template definition and invocation are mapped into a XML DTD. Each template is then translated into a SMIL document. In this paper, we give an example to show the advantages of our approach.     

A Scalable Toolkit for Designing Multimedia Authoring Environments

This paper introduces Kaomi, a scalable toolkit for designing authoring environments of multimedia documents. The underlying concept is to provide the designer of multimedia applications with a fast method to get an authoring system based on a set of synchronized views (the presentation view for displaying the document, the scenario view for showing the temporal organization of the document, ...) so that each view is the support of editing actions. Kaomi is flexible enough to support a variety of multimedia documents declarative formats. It is indeed a scalable toolkit since it provides facilities for extending and/or for modifying the resulting authoring environment. In addition, cross-platform portability is provided which allows operation in the heterogenous Internet environment. The use of Kaomi is mainly described through the design of two authoring environments: one for authoring a sub-set of the Smil standard of the W3C and the other one for Madeus, a constraint based multimedia language.     

网页情境呈现速度的实验研究

呈现速度是衡量网站好坏的一个因素．本文从多媒体信息和背景两个方面对网页进行呈现速度的实验研究。     

Synchronization in Specification-based Multimedia Presentations

Several information protocols exist for exchange of multimedia information. The {H}yper{T}ext {T}ransfer {P}rotocol (HTTP) of NCSA combines hypertext techniques with multimedia to provide an intuitive, easy-to-use hypermedia interface. However, HTTP does not provide the means to synchronize different multimedia channels. The NCSA hypermedia browser, Mosaic, has been modified to incorporate synchronization constraints. Platform-independent multimedia authoring programs have been combined in a new synchronization scheme. The {H}yper{T}ext {M}arkup {L}anguage (HTML) has been extended to allow the specification of temporal dependencies between different media channels. This extension allows synchronization in the authoring of hypermedia presentations using Mosaic.     

A metagenetic algorithm for information filtering and collection from the World Wide Web

This paper describes the implementation of evolutionary techniques for information filtering and collection from the World Wide Web. We consider the problem of building intelligent agents to facilitate a person's search for information on the Web. An intelligent agent has been developed that uses a metagenetic algorithm in order to collect and recommend Web pages that will be interesting to the user. The user's feedback on the agent's recommendations drives the learning process to adapt the user's profile with his/her interests. The software agent utilizes the metagenetic algorithm to explore the search space of user interests. Experimental results are presented in order to demonstrate the suitability of the metagenetic algorithm's approach on the Web.     

多媒体文件在线展示通用框架设计及实现

一般视音频网站在上传多媒体文件后要转换文件格式,不但消耗服务器软硬件资源,而且不同程度地降低视音频质量。针对这些问题,提出一种不用转换视音频格式即可在线展示视音频以及其他类型多媒体文件的通用框架,并给出了实现方法。该框架适用于视频、音频、图像、文档等多媒体文件的在线展示。具有实时性、高质量、通用性、自适应性、可扩展性等特点。     

基于WWW的音频信息系统

介绍了网络多媒体信息的特点,ＷＷＷ和Ｊａｖａ的音频功能,并描述了音频信息的结构和客户访问音频信息的软件界面。     

万维网局部结构研究与分析

文中以网站为单位研究万维网的局部结构特征,检测包含3个节点的模体,发现全连通子图是绝大多数实验网站的模体,而连接稀疏的子图只属于极少数实验网站的模体,然后结合当前成熟的搜索引擎技术对上述结果做出理论分析。为了测试实验网站是否具有相同的局部结构,其后进行了三元组重要性剖面实验,发现所有实验网站中都包含3个网络超家族。     

STAMP: A Model for Generating Adaptable Multimedia Presentations

The STAMP model addresses the dynamic generation of multimedia presentations in the domain of Multimedia Web-based Information Systems. STAMP allows the presentation of multimedia data obtained from XML compatible data sources by means of query. Assuming that the size and the nature of the elements of information provided by a data source is not known a priori, STAMP proposes templates which describe the spatial, temporal, navigational structuration of multimedia presentations whose content varies. The instantiation of a template is done with respect to the set of spatial and temporal constraints associated with the delivery context. A set of adaptations preserving the initial intention of the presentation is proposed.Ioan Marius Bilasco is a Ph.D. student at the University Joseph Fourier in Grenoble, France, since 2003. He received his BS degree in Computer Science form the University Babes Bolyai in Cluj-Napoca, Romania and his MS degree in Computer Science from the University Joseph Fourier in Grenoble, France. He joined the LSR-IMAG Laboratory in Grenoble in 2001. His research interests include adaptability in Web-based Information Systems, 3D multimedia data modelling and mobile communications.Jérôme Gensel is an Assistant Professor at the University Pierre Mendès France in Grenoble, France, since 1996. He received his Ph.D. in 1995 from the University of Grenoble for his work on Constraint Programming and Knowledge Representation in the Sherpa project at the French National Institute of Computer Sciences and Automatics (INRIA). He joined the LSR-IMAG Laboratory in Grenoble in 2001. His research interests include adaptability and cooperation in Web-based Information Systems, multimedia data (especially video) modeling, semi-structured and object-based knowledge representation and constraint programming.Marlène Villanova-Oliver is an Assistant Professor at the University Pierre Mendès France in Grenoble, France, since 2003. In 1999, she received her MS degree in Computer Science from the University Joseph Fourier of Grenoble and the European Diploma of 3rd cycle in Management and Technology of Information Systems (MATIS). She received her Ph.D. in 2002 from the National Polytechnic Institute of Grenoble (INPG). She is a member of the LSR-IMAG Laboratory in Grenoble since 1998. Her research interests include adaptability in Web-based Information Systems, user modeling, adaptable Web Services.     

多媒体对象的Agent展示集成模型*

根据多媒体对象的面向对象特点,给出了一种基于“事件-条件-动作”的Agent展示集成模型.该模型集对象的内容、时序、空间关系于一体,通过消息传递与对象展示状态事件控制对象展示集成的行为,保证了对象的封装性,并对用户的交互提供有力的支持,是一种动态集成模型.“事件-条件-动作”机制是主动数据库中广泛采用的方法,已有成熟的技术支持.通过对Allen所定义的时序关系的表示,说明了模型的表达能力,并通过实例加以验证.指出了展示集成模型在多媒体数据库中的作用.     

网络信息搜寻技术与发展

信息搜寻是网络技术的新课题。本文介绍了在因特网上进行信息搜寻采用的算法、策略和现有检索工具的工作原理以及网络信息搜寻技术的新发展。     

Automatically Determining Semantics for World Wide Web Multimedia Information Retrieval

Search engines are useful because they allow the user to find information of interest from the World Wide Web (WWW). However, most of the popular search engines today are textual; they do not allow the user to find images from the web. For effective retrieval, determining the semantics of the images is essential. In this paper, we describe the problems in determining the semantics of images on the WWW and the approach of AMORE, a WWW search engine that we have developed. AMORE's techniques can be extended to other media like audio and video. We explain how we assign keywords to the images based on HTML pages and the method to determine similar images based on the assigned text. We also discuss some statistics showing the effectiveness of our technique. Finally, we present the visual interface of AMORE with the help of several retrieval scenarios.     

Adaptive Multimedia Presentation Strategies

Multimedia presentations comprise various media objects such as text, audio, image, and video that are delivered to users according to certain temporal relationships. In stored multimedia presentations, these temporal relationships are explicitly formulated by the author(s) and stored along with the presentations. However, it is difficult to ensure that these temporal relationships are always strictly preserved in real-time, distributed multimedia presentations. This is due to the fact that various components of the run-time environment such as operating system and network may offer only best effort services, i.e., they may not be able to provide any real-time guarantees. In this paper, we survey the different approaches that can be used for adapting multimedia presentations to handle instances where temporal relationships cannot be preserved in a strict manner. We classify these approaches into three categories and discuss when these categories of adaptations can be used.     

弱同步及其在WWW上的应用

在当今世界,WWW已经成为新颖而强大的媒体,但是,现在运行于Web上的应用仍然不是完全多媒体化的.这主要是因为Internet网络是不可靠、尽力型的,无法提供数据实时传输的保证,尤其对那些大数据量的连续媒体(如视频与音频数据).因此,在Web环境中多媒体对象间的同步就变得格外复杂.该文提出了一种新颖的同步模型：弱同步.它使多媒体文档即使在多变的环境下也能获得最佳效果.在弱同步中,不仅可以定义对象间确定的时间关系,也可以定义非确定的时间关系.此外,媒体间的同步关系,如严格同步和松散同步,也可以在文档的同步描述中定义.     

A caching relay for the World Wide Web

We describe the design and performance of a caching relay for the World Wide Web. We model the distribution of requests for pages from the web and see how this distribution affects the performance of a cache. We use the data gathered from the relay to make some general characterizations about the web.