互动式多媒体课件的交互性设计与实现

当前,中小学教师自己制作的多媒体课件虽然数量很多,但是大多数质量不高;特别是课件中的交互形式较少、设计得不够科学合理。文章阐述了多媒体课件交互性设计的相关理论,并在理论指导下制作了一个互动式多媒体课件,通过实例阐述了教学内容、学习情境、交互控制和教学媒体的整合与实现。     

QoS Management in Educational Digital Library Environments

Advances in multimedia computing technologies offer new approaches to the support of computer-assisted education and training within many application domains. Novel interactive presentation tools can be built to enhance traditional teaching methods with more active learning. Since a variety of user expectations are possible in such an environment, research must address the incorporation of these factors into presentation tools. During an interactive learning/training process, presentation tools must be able to handle various types of delays. A flexibly adjustable quality of service (QoS) should thus be supported. In this paper, we investigate a framework and systematic strategies for supporting the continuous and synchronized retrieval and presentation of multimedia data streams in a client/server distributed multimedia environment for educational digital libraries. Specifically, we establish a practical framework for specifying multimedia objects, tasks, schedules, and synchronization constraints between media streams. We identify the QoS parameters critical to the support of multimedia presentations for learning and training activities. Based on the proposed framework and QoS specifications, we develop presentation scheduling and buffer management strategies which can enforce the specified QoS requirements in an educational digital library environment.     

Query Processing Techniques for Multimedia Presentations

A multimedia presentation is a synchronized, and possibly interactive, delivery of multimedia data to users. We expect that, in the future, multimedia presentations will be stored into and queried from multimedia databases. In an earlier work, we have designed a graphical query language, called GVISUAL, that allows users to query multimedia presentations based on content information. In this paper, we discuss GVISUAL query processing techniques for multimedia presentations. More specifically, we discuss the translation of GVISUAL queries into an operator-based language, called O-Algebra, with three new operators, and efficient implementations of the new O-Algebra operators using a coding system called nodecodes.     

MING-I: a distributed interactive multimedia document development mechanism

The next generation of interactive multimedia documents can contain both static media, e.g., text, graph, image, and continuous media, e.g., audio and video, and can provide user interactions in distributed environments. However, the temporal information of multimedia documents cannot be described using traditional document structures, e.g., Open Document Architecture (ODA) and Standard Generalized Mark-up Language (SGML); the continuous transmission of media units also raises some new synchronization problems, which have not been met before, for processing user interactions. Thus, developing a distributed interactive multimedia document system should resolve the issues of document model, presentation control architecture, and control scheme. In this paper, we (i) propose a new multimedia document model that contains the logical structure, the layout structure, and the temporal structure to formally describe multimedia documents, and (ii) point out main interaction-based synchronization problems, and propose a control architecture and a token-based control scheme to solve these interaction-based synchronization problems. Based on the proposed document model, control architecture, and control scheme, a distributed interactive multimedia document development mechanism, which is called MING-I, is developed on SUN workstations.     

基于校园网的多媒体网络教学系统设计

多媒体网络教学系统是一个基于校园网的集备课、课件制作、课件点播、自主学习、网上考试于一体的虚拟教学环境。本文重点介绍安徽建筑工业学院多媒体网络教学系统的总体结构设计和各子系统的功能。     

多格式共存的多媒体课件库的设计与实现

多媒体课件库是实现数字化教与学的基础.探索一种基于B/S结构的多格式共存的多媒体课件库的设计与实现方法,提出了系统结构模型、系统数据流框架和主要功能模块的设计,针对每一种格式的多媒体课件,探讨了课件的存储、管理、应用、下载等技术实现方法,并重点解析了几种关键的实现技术,如流媒体技术、虚拟光驱技术和数据库处理技术等.     

基于Authorware平台的多媒体设计方法

Authorware是一个功能强大而且应用广泛的多媒体创作工具软件,以Authorware为多媒体的集成设计平台,结合典型的平面设计、二维、三维动画设计以及视频处理、音频处理等软件,阐述了构建多媒体应用的总体设计架构、交互设计方法,提出了文字、图形、动画、音频、视频等各种多媒体素材的建议文件格式以及导入方式,介绍了发布多媒体课件或产品演示程序时所运用的方法。     

一种面向多对象多媒体应用的同步控制方法

多对象多媒体应用允许多路媒体同时呈现,其同步控制比较复杂,可分为传输过程中与呈现过程中的同步。然而现有的同步方法忽略了媒体在最后呈现过程中的同步,也没有考虑各媒体对象之间的同步要求差异。针对以上问题,为视频点播提出了一种在应用层上控制多对象多媒体同步呈现质量的方法。在采用多级缓冲门限实现媒体内同步反馈控制的基础上,依据主要媒体对象的呈现时间戳,在每一个呈现场景内调整次要媒体对象的呈现速率,从而实现媒体间的同步呈现。实验结果表明该方案能够有效地提高同步质量,且媒体间的同步性能平均提高28.45%。     

多媒体结构的设计与选择

构造一个上下文敏感,具有可交互性的多媒体表示远比单纯构造视听信息或者单纯构造文本信息复杂得多.多媒体对象之间的交互需要有一个用来同步和异步交互的,包括立即响应的时空关系组织起来.根据构造环境的需要来考虑多媒体的结构构造.先通过介绍影响多媒体结构构造的7个要素来认识多媒体,然后在4种典型的构造模式中进行多媒体环境的选择.这4种构造模式分别是:结构化、时间关系、图关系、脚本形式.通过各种各样的观察和分析发现,结构化的多媒体构造为多媒体的表示提供了最为有效的表示形式.     

基于FLASH的多媒体课件开发探索

随着计算机技术的飞速发展,现代教学越来越多地依托于多媒体技术,Flash以其交互性强、容量小、色彩鲜明、节奏明快等优点受到广大用户的青睐。结合教学及开发实践经验,对利用Flash开发多媒体课件、特别是如何使用脚本语言实现课件的交互性进行了一些探索。     

Synchronization of distributed multimedia systems with user interactions

Without user interactions, multimedia presentations are just fancy slide shows with sound and video supports. User interactions by themselves do not change the temporal relationships among multimedia objects, such as texts, graphics, images, audio, and video, but affect the playback schedules. In this paper, we propose a synchronization mechanism to guarantee the quality of multimedia presentation with user interactions. In our protocol, each presentation site requests media transmission from the required media servers at certain time intervals prior to the playback deadlines, where these time intervals are the response times to cover possible experienced end-to-end delays and packet losses, and waits for an initial setup time to ensure intermedia synchronization before starting the presentation. Users may interact with the presentation. This synchronization mechanism solves the problems incurred by user interactions by determining the new presentation scenario produced by the interactive operation, calculating the corresponding setup time, and then rendering the new playback and retrieval schedules.     

基于Petri网的多媒体同步通信模型

本文提出了一种新的多媒体同步模型--交互式多媒体动态同步Petri网模型(IMDSPN)。IMDSPN能够准确地描述多媒体对象的各种同步时态关系，可以克服其表现过程中的同步失败问题，并可以保证在用户交互控制下同步关系的全局一致性，它有效地描述了多媒体的动态特性。     

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.     

Storyline 2 在交互式网络多媒体 课件制作中的应用 ——以《css 列表》一课为例

本文介绍了storyline2 的功能及特点,通过具体的案例介绍了交互式多媒体课件的制作过程,旨在为没有编程 基础的教师开发交互式网络课件提供一种借鉴。     

基于人机界面学的多媒体课件的应用探索

从传统教学模式向多媒体教学模式的过渡中极大的提高了学生的学习兴趣。该文从人机界面学的角度出发探索其在多媒体课件开发中的实际应用,并且结合人机界面学的理论来开发多媒体课件,这样可以更好的把握学生的学习心理,以便制作出更好的多媒体课件。     

基于多媒体技术的高校《数字电子技术》 教学改革研究

本文在对高校《数字电子技术》教学现状和多媒体技术进行简要了解的基础上,对多媒体技术应用于《数字电 子技术》中的教学意义进行了分析,并从引导学生自主教学,增强课件交互性,采用“板书+多媒体”组合式教学,引入电路仿真 以及提高教师多媒体应用能力等方面对基于多媒体技术的《数字电子技术》课程教学改革进行了研究,以期调动学生学习自主 性,提高教学有效性。     

虚拟现实技术——多媒体课件开发的新方向

随着虚拟现实技术的发展,基于虚拟现实技术的多媒体课件在教育中的作用越来越重要,使用具有交互功能的3D课件,学生可以在实际的动手操作中得到更深的体会,从而提高多媒体课件的功能,更加有效地提高教学效果。     

Cross-media retrieval using query dependent search methods

The content-based cross-media retrieval is a new type of multimedia retrieval in which the media types of query examples and the returned results can be different. In order to learn the semantic correlations among multimedia objects of different modalities, the heterogeneous multimedia objects are analyzed in the form of multimedia document (MMD), which is a set of multimedia objects that are of different media types but carry the same semantics. We first construct an MMD semi-semantic graph (MMDSSG) by jointly analyzing the heterogeneous multimedia data. After that, cross-media indexing space (CMIS) is constructed. For each query, the optimal dimension of CMIS is automatically determined and the cross-media retrieval is performed on a per-query basis. By doing this, the most appropriate retrieval approach for each query is selected, i.e. different search methods are used for different queries. The query dependent search methods make cross-media retrieval performance not only accurate but also stable. We also propose different learning methods of relevance feedback (RF) to improve the performance. Experiment is encouraging and validates the proposed methods.     

基于动态网站开发技术的《学生应聘简历制作》 多媒体交互课件的设计和实现

本文利用asp 技术设计并实现了关于学生应聘简历制作的多媒体交互课件,课件采用项目教学的思想,分为项 目预学习、项目学习、讨论区、作品展示区、自我评价区等几个部分;能实现作品的上传,开展学生之间的互评以及学生的自评, 从而很好地实现课堂师生以及学生之间的交互功能。