Multimedia object modeling and storage allocation strategies

The improvements in disk speeds have not kept up with improvements in processor and memory speeds. Many techniques have been proposed and utilized to maximize the bandwidths of storage devices. These techniques have proven useful for conventional data, but when applied to multimedia data, they tend to be insufficient or inefficient due to the diversified data types, bandwidth requirements, file sizes and structures of complex objects of multimedia data. In this paper, we discuss the design of an efficient multimedia object allocation strategy that strives to achieve the expected retrieval rates and I/O computational requirements of objects; and also effectively balances the loads on the storage devices. We define a multimedia object model, describe the multimedia object and storage device characteristics, the classification of the multimedia objects according to their I/O requirements, and the fragmentation strategies. We use a bipartite graph model for mapping of fragments to storage devices. A cost function based on a disk utilization per allocated space, the amount of free space, and the bandwidth of a storage device is used to determine the optimal allocation for an object's data.     

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 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.     

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     

分布式多媒体系统同步机制的研究

分布式多媒体系统将是未来国家信息基础设施（NII）的重要组成之一。多媒体同步机制是分布式多媒体系统及CSCW系统中的一个关键问题,多媒体同步机制的优劣直接影响着分布式多媒体系统及CSCW系统的应用。在文章中,对分布式多媒体系统的关键技术--多媒体同步进行了讨论。着重分析了分布式多媒体同步、同步参考模型及形式化描述技术。     

多媒体数据库的关键技术:多媒体数据模型

该文在分析多媒体数据库MMDBMS体系结构的基础上,指出了MMDBMS设计中的关键技术及其相互关系。然后在mpeg-7标准的背景下,重点描述了一个面向对象的多层框架结构的多媒体数据模型UMMD。     

一种针对多媒体扩展指令集和实际多媒体程序的自动向量化方法

自动向量化编译是利用处理器的多媒体扩展指令集提升多媒体程序性能的理想工具．但目前的研究不能有效加速实际程序．其主要原因是：普通算术操作的向量化不一定有性能提升;而多媒体典型操作因为其在源代码中表现形式多样而不能充分向量化．为了解决这一问题,文章对经典向量化算法进行改进以灵活统一地向量化这两类操作．主要的改进是增加了两个步骤：统一操作的不同表现形式和识别有价值的向量化操作．改进后的算法可以充分利用指令集生成高效代码,从而对实际多媒体程序拥有良好效果．此外,该算法可扩展性也很强．     

Benchmarking Multimedia Databases

Multimedia technologies are being adopted both in the professional and commercial world with great enthusiasm. This has led to a significant interest in the research and development of multimedia databases. However, none of these efforts have really addressed the issues related to the benchmarking of multimedia databases. We analyze the problem of benchmarking multimedia databases in this paper and suggest a methodology.     

多媒体音箱

女白领的首选——索尼多媒体音箱SRS-M5上市日前,在针对游戏用户、时尚便携用户、入门级用户和桌面用户分别推出各种各具特色的多媒体音箱产晶之后,索尼又专为女性白领用户推出了一款SRS-M5多媒体音箱。洁白通透的象牙白、轻盈时尚的造型、人性化的设计,让索尼SRS-M5在音乐欣赏上拥有无限自     

多媒体技术漫谈

这篇文章,主要是从宏观上总结了一下现阶段图像视频底层技术的发展及应用点,从一个图像视频算法研究人员的角度谈一谈对这个领域的认识。图像视频领域的商业应用,集中在多媒体娱乐、互联网、智能监控、工业机器视觉、OCR、生物特征识别、医学图像处理以及军事国防几个领域,多媒体领域是其中的一个重要分支,很多图像视频领域的新算法和新理论往往在多媒体领域得到最先的应用。     

多媒体教学之我见

多媒体的课堂教学形式,是未来常规课堂教学形式的必然发展趋势.在课堂教学中,如何科学、合理地利用多媒体信息,怎样走出目前对多媒体教学手段使用与认识上的误区,值得思考与探讨.     

Multimedia und Workflow

Ohne Zusammenfassung