MPEG-4格式视频流传输与存储的设计方法

基于校园网的多媒体资源库,核心技术之一是 MPEG-1、MPEG-2和 MPEG-4等格式的视频流技术的应用。本文通过对多媒体资源库中的 MPEG 格式视频流传输与存储系统、网络传输系统相关运行参数的设计与计算,提出适合于 MPEG 格式视频流传输的多媒体资源库系统的相关设计与计算方法。     

多媒体数据压缩标准—MPEG系列

随着各种多媒体数据压缩标准的制定及计算机硬件、网络技术的发展，多媒体信息的应用呈现出爆炸式的增长。为了适应用户终端的多样性及网络自身的传输特性，20世纪90年代后期，一些国际标准化组织制定了几个多媒体数据压缩标准，并且获得了成功的应用，其中最主要的是MPEG系列。在此主要从视频的编码原理，视频数据组织结构和应用领域等方面对MPEG－1、MPEG－2、MPEG－4和MPEG－7做了一些介绍。     

MPEG-7概要

MPEG－7（多媒体内容描述接口）是一个全新的多媒体标准，将于今年9月正式成为国际标准。本文简要介绍了制定MPEG－7的背景和目标，以及MPEG－7的应用领域，并着重介绍MPEG－7标准的具体内容。     

MPEG-7及其应用

MPEG－7是国际MPEG组织正在制订定的第4个MPEG标准,旨在实现多媒体内容描述的标准化。简要介绍了MPEG－7的应用背景、目标、内容及常用术语,并探讨了MPEG－7可能的应用领域。     

MPEG—7：多媒体技术的新风景线

多媒体数据急剧增加，表示格式非常繁杂，使用户难以检索到所需信息。MPEG－7适时推出，为解决这一问题提供了许多方法和参考工具。MPEG－7具有较强的灵活性、可扩展性，应用广泛，必将促进多媒体技术快速发展。     

基于MPEG—4的互联网应用层接口的研究

本文针对MPEG－4压缩标准在互联网上应用,主要分析了MPEG－4对各种媒体对象的组织和数据流的管理,具体研究MPEG－4压缩标准在现有的Web浏览器上如何提供实时交互的多媒体服务,用多线程的方法设计了基于MPEG－4在现有互联网上的标准通信应用层接口软件。     

多媒体编码新标准—MPEG—4

本文介绍了一种新的多媒体编码标准－MPEG－4,着重讨论了它的特点、功能及MPEG－4的系统、视频和音频标准。     

MPEG—4视频的实时传输

MPEG－4是一个全新的多媒体标准,采用了基于对象和模型的编码方法。简要总结了MPEG－4视频编码的各种特点,对网络实时传输MPEG－4视频提出了各种评估标准,并针对面临的困难介绍了相应的解决方案。     

基于WEB方式的多媒体教学资源库平台建设研究与实践

多媒体网络教学资源库平台是把计算机技术、多媒体技术、网络技术和现代教学方法有机结合起来的一种教学资源库平台。本文研究的多媒体网络教学资源库平台是以高校公共课——ACCESS数据库应用基础为案例基于WEB技术搭建,主要包括课程教学、实验教学、教学资源、课程考试、成绩查询、在线答疑等环节。该平台的建成和应用对案例课程的教学资源共享、情境探究式教学、自主学习、丰富教学内容、提高教学质量和效益、实现教育技术现代化起到了积极作用。     

多媒体资源库与教学资源特性研究

主要介绍由多媒体素材库、多媒体课件库和VOD视频点播系统组成的多媒体资源库的基本原理和与多媒体资源库直接相关的多媒体教学资源分类与特性分析研究，特别是流媒体技术的应用。     

Multimedia databases

The rapidly growing interest in building multimedia tools and applications has created a need for the development of multimedia database management systems (MMDBMSs) as a tool for efficient organization, storage and retrieval of multimedia objects. We begin with a word about traditional database management systems (DBMSs). Then we present an overview of the MMDBMS research issues, challenges, methods, models, and architectures. We review the state of the art and research contributions from related disciplines. Finally, we consider possibilities and probabilities for MMDBMS research in the future.     

多媒体教学法在教学中的应用

多媒体技术由于其形象和直观等特点,在教学中得到了越来越多的应用,该文从多媒体的优点出发,分析了当前高校多媒体教学的现状和存在的一些问题并提出了相应的对策。     

Multimedia scouting

Experiments aimed at developing new media types through the serious consideration of existing media are described. Six areas (print, audiovisual, speech, computer-generated activities, materials, and expression of ideas) are examined, and it is shown how the multimedia approach can be used to extend them into new genres of information display. The benefits of multimedia are summarized     

Multimedia Algorithmics

If perceptually relevant multimedia methods with guaranteed performance are not developed soon, there is no hope that the problem of multimedia information overload is effectively solved. Research is needed to handle images, music, video, and 3D models, with methods that guarantee robustness, invariance, efficiency, etc., and are also perceptually and cognitively relevant. The invention of algorithms that provably satisfy such properties is a new field of research: multimedia algorithmics.     

多媒体同步模型研究

多媒体同步模型主要研究多媒体系统中各种媒体对象之间时态关系的规范问题。本文综述了国内外关于多媒体同步模型的研究现状，包括时间线模型、层次模型及参考点模型，并指出了进一步的研究方向。     

Multimedia Phase-Spaces

Dynamic phase-spaces are suggested as a way of designing and implementing interactive multimedia systems. A dynamic phase-space is a space of properties overlayed with dynamics. The space is “decorated” with multimedia resources such as pictures, music, sound-effects, speech, and movies. This architecture may help resolve the basic problem of interactive systems, namely that both user and author need to influence the system. If the user is passive, the system is not interactive, but if the author has no power, no interesting narratives can be told. But how can two or more people influence the same system at the same time? The solution presented in the paper is that the system objects are controlled by a global dynamics and neither party is allowed to influence the objects directly; they may only influence objects indirectly by perturbing the global dynamics. In this way, contradictory inputs from user and author have a well-defined solution. The paper describes an experimental museum installation that implements these ideas. In addition, a set of interactive rhetorical patterns are defined and exemplified. The main theoretical inspiration of the system is Thom's catastrophe theory, although it is not used in a literal sense.     

Multimedia mail

Electronic mail for traditional text exchange as asynchronous communication means between computer users is widely built upon in many application areas. Whereas Multimedia-Mail systems – including text, graphics, still images, audio, video and documents – were limited to isolated communities – at least two very promising approaches are being under development: the MIME (Multipurpose Internet Mail Extension), an extension of Internet Mail as well as the Multimedia Teleservice based on CCITT Recommendation X.400(88) being under development within the BERKOM project funded by the German TELEKOM. The store-and-forward mechanism inherent to electronic mail is complemented in the later one by an additional exchange mechanism allowing the resolution of references to message content, e.g. video. Such references may be put into a message in place of the content itself. Internet/MIME and OSI/X.400, their interworking, asynchronous information server access via Multimedia-Mail, as well as possible future developments especially in the area of asynchronous Computer Supported Cooperative Work (CSCW) are discussed.     

多媒体开采初探

1 引言对于多媒体的管理,早期采用文件的管理方式。70到80年代期间,数据库学派牵头,采用关键词的描述方法建立媒体数据的索引以达到管理的目的。90年代以后,人们转向研究面向网络环境下的支持基于内容检索的大规模的多媒体数据库。基于内容的检索在一定程度上解决了信息搜索和资源发现的问题,但是基于内容的检索只能获取用户要求的相关信息,而不能从大量多媒体数据中分析出隐含的有价值的模式和知