Perspective:Societally connected multimedia across cultures

The advance of the Internet in the past decade has radically changed the way people communicate and col- laborate with each other. Physical distance is no more a barrier in online social networks, but cultural differences (at the individual, community, as well as societal levels) still govern human-human interactions and must be con- sidered and leveraged in the online world. The rapid de-ployment of high-speed Internet allows humans to interact using a rich set of multimedia data such as texts, pictures, and videos. This position paper proposes to define a new research area called ’connected multimedia’, which is the study of a collection of research issues of the super-area social media that receive little attention in the literature. By connected multimedia, we mean the study of the social and technical interactions among users, multimedia data, and devices across cultures and explicitly exploiting the cultural differences. We justify why it is necessary to bring attention to this new research area and what benefits of this new research area may bring to the broader scientific research community and the humanity.     

三网融合的技术现状和未来发展

三网融合是网络发展的主要方向,无线网络是接入有线网络的一个重要途径。本文主要概述了因特网、电信网络、有线电视网络和无线网络的技术现状;分析在三网融合的形势下,它们各自都可以为发展未来包含现在由三种网络提供的所有服务的综合业务网提供核心技术的能力;指出没有单个网络技术能够成为无争议的赢家:融合的网络将具有异构网络集合的特征,提供多种多样的服务;然后在更广阔的视野上阐明了在三网融合之后的未来全局多媒体网络的特征以及建立具有这样的特征的网络所面临的挑战和所需要的变革和创新。     

浅析高职院校多媒体课室中控系统的网络构建与维护

随着现代教育技术的不断发展,多媒体课室的中控系统在多媒体教学中起着举足轻重的作用。就目前来看,多媒体课室中控系统的构建大多采用网络化中央控制管理信息系统。该系统主要是网络技术、计算机技术、单片机技术结合起来,把多媒体课室的全部设备无机地衔接起来,使之成为一个具有远程控制的网络型中央控制系统。     

论版权保护的图像数字水印技术研究

对多媒体产品进行数字水印处理是解决这类产品的版权保护的有效途径。从数字水印的概念、原理和基本特性出发,探讨了如何构造版权水印信息、嵌入用户指定的授权信息、版权水印鉴定等问题。     

高校多媒体教室有效性管理探究

随着多媒体技术的不断发展及多媒体教学的普及,高校的多媒体教室日益增多,加大了管理的难度。在人力资源有限的情况下,怎样有效管理多媒体教室是亟待解决的问题。本文笔者通过分析管理中出现的问题,测试了多种管理方式,并分析了它们的优缺点,最后确定使用多媒体教室管理系统软件方式来有效管理多媒体教室。     

中学计算机多媒体技术应用

在新课改的推动下,初中课堂教学改革掀起来热潮,计算机多媒体技术的应用是其中一大亮点。但长期以来,由于很多教师对计算机多媒体技术的初中课堂教学中的作用认识不足,导致应用中出现了一些问题。文章基于初中课堂教学中计算机多媒体技术应用现状的分析基础上来审视计算机多媒体技术的作用,并提出应用策略。     

《无机及分析化学》在多媒体教学的应用及思考

对多媒体技术在无机及分析化学教学的应用进行了，阐述和分析，指出使用多媒体教学应注意的问题。     

Investigating dependencies in software requirements for change propagation analysis

ContextThe dependencies between individual requirements have an important influence on software engineering activities e.g., project planning, architecture design, and change impact analysis. Although dozens of requirement dependency types were suggested in the literature from different points of interest, there still lacks an evaluation of the applicability of these dependency types in requirements engineering.ObjectiveUnderstanding the effect of these requirement dependencies to software engineering activities is useful but not trivial. In this study, we aimed to first investigate whether the existing dependency types are useful in practise, in particular for change propagation analysis, and then suggest improvements for dependency classification and definition.MethodWe conducted a case study that evaluated the usefulness and applicability of two well-known generic dependency models covering 25 dependency types. The case study was conducted in a real-world industry project with three participants who offered different perspectives.ResultsOur initial evaluation found that there exist a number of overlapping and/or ambiguous dependency types among the current models; five dependency types are particularly useful in change propagation analysis; and practitioners with different backgrounds possess various viewpoints on change propagation. To improve the state-of-the-art, a new dependency model is proposed to tackle the problems identified from the case study and the related literature. The new model classifies dependencies into intrinsic and additional dependencies on the top level, and suggests nine dependency types with precise definitions as its initial set.ConclusionsOur case study provides insights into requirement dependencies and their effects on change propagation analysis for both research and practise. The resulting new dependency model needs further evaluation and improvement.     

基于HEVC的帧内快速模式选择算法

为了解决高效率视频编码(High Efficiency Video Coding,HEVC)复杂度过高的问题,基于粗粒度模式选择(Rough Mode Decision,RMD)过程提出一种降低编码复杂度的方法。该算法充分利用了RMD候选队列的相似程度和预测模式在方向上的相关性这两个特性,进一步减少了进入率失真优化过程(Rate Distortion Optimization,RDO)的预测模式数量,达到了降低编码复杂度的目的。实验结果表明,该算法在编码质量损失0.5%的情况下节省了近22%的编码时间。     

基于开发者协作关系和信息检索的需求跟踪系统

目前自动化需求跟踪的研究广泛使用文本信息检索技术。然而信息检索会遗漏一些文本不相似但是实际相关的软件制品,导致自动化跟踪的精度不高。针对上述问题,提出利用开发者协作关系来进行优化,研发了基于开发者协作关系和信息检索的需求跟踪系统。该系统在进行需求跟踪时,首先用信息检索推荐与需求文本上相似的代码,然后从代码提交日志中挖掘开发者协作关系,根据开发者协作关系再推荐相关代码,用户根据两次推荐的结果确定正确的需求代码跟踪关系。试验结果表明该系统能够找到信息检索遗漏的需求跟踪关系,能够提高自动化跟踪的准确性,节省跟踪时间。