基于BREW手机的移动监控客户端设计

为了在CDMA 1x移动网络和BREW手机上设计和实现用于移动平台的监控客户端,在利用现有的流媒体和视频编解码等监控技术的基础上,综合考虑了移动网络带宽不足和移动设备性能较低等因素,讨论了在移动平台上实现视频监控的相关关键技术,提出了在网络不稳定的情况下对视频包丢失的处理流程,以及H.264解码器针对BREW平台的优化方法.测试结果表明,实现的移动监控客户端可以稳定播放比较清晰的监控视频,并且具有较高的实时性.     

移动视频监控系统的设计与实现

为了提高现有监控系统在实时性和可控性上的性能,满足日益迫切的安全需求,首先以GPRS为例,对移动网络中的视频编解码和远程命令传送等两个关键技术问题进行了探讨,并提出了有效的解决方案.进而在此基础上设计并实现了一个基于嵌入式平台的移动视频监控系统.通过将监控终端部署在智能手机、PDA和Pocket PC等移动设备,该系统允许用户对目标场景随时随地进行视频访问,同时利用Web Service技术实现了监控端对摄像头的远程控制,从而摆脱了传统监控系统对于监控回放地理位置的束缚,提高了整个监控系统的移动性、实时性、可控性和灵活性,为各类场馆、学校和家庭等场所的实时全方位监控提供了一个稳定、实用的解决方案.     

基于iOS平台的移动视频监控软件设计

传统的远程视频监控系统所需软硬件资源大、视频传输协议和视频采集设备控制协议相互独立,系统传输带宽要求高、时延长、实时性不高。为解决这些问题,利用开放无线监控协议中的信息体结构,将视频信息传输、视频采集设备控制和其他信息融合在一个数据包中,并基于iOS移动操作系统和H.264视频编码标准,设计并实现一种集视频传输与控制于一体的移动视频监控软件。测试结果表明,该移动视频监控软件可有效提高移动视频监控系统的性能,具有控制响应速度快、传输带宽要求低、分辨率自适应以及实时视频播放流畅等特点。     

达芬奇TMS320DM6446的视频软件设计

针对视频监控系统对实时性和带宽的高要求,提出以达芬奇异构双核处理器TMS320DM6446为基础的解决方案.双核间的通信和协作是基于编解码器引擎机制来实现的.ARM子系统负责I/O端口控制、算法调度、图形用户界面、网络传输等操作,DSP子系统则实现H.264视频编解码.经过研究,实现了视频软件设计.该方案实时性较好、部署方便,在视频监控领域具有较好的应用前景.     

基于DaVinci技术的3G移动视频监控系统设计与实现

本文针对3G移动视频监控系统面临实时性高、运算量大、带宽低的要求,提出了一种基于DaVinci技术和3G网络传输为基础的解决方案。该方案完成了系统硬件详细设计和软件模块化详细设计,实现了OSD字幕的前端添加功能,并解决了在3G无线带宽抖动下采用自适应帧码率和QoS机制,使视频图像流畅稳定。本设计的测试结果表明,能够在3G低带宽下流畅地进行移动视频监控。     

基于ARM的远程监控系统的设计

视频监控系统随着嵌入式技术、多媒体技术、计算机网络技术的快速发展也在不断地更新。本文设计实现了一个基于嵌入式处理器ARM9的网络视频监控系统。利用linux操作系统提供的V4L2API实现对视频设备的视频数据采集;使用Libjpeg进行视频压缩,实现了视频数据的网络传送和远程监控。基于嵌入式技术的网络视频监控系统与传统的视频监控系统相比具有体积小、成本低、稳定性高、实时性好等优点,具有广阔的应用前景。     

3G网络的移动视频监控系统

移动流媒体应用是基于3G独特高数据带宽的业务应用,是3G业务网络中最具市场潜力的增值业务类型。为了进一步推广移动流媒体技术的应用,该文将3G移动网络和固网视频监控结合起来,实现两者优势互补,提出了一种基于3G网络的移动视频监控系统模型,此模型能够弥补传统移动网络和固网的不足对移动视频监控系统的设计具有一定的指导意义。     

无线移动视频监控原型研究

提出一种基于DirectShow的无线移动视频监控方案,移动节点利用摄像头实时采集视频信息,通过WI-FI、GPRS网络传输到监控中心,从而使监控中心能实时监控各移动节点,并使各节点间进行视频通信。该方案不同于传统的视频监控方案,实验验证该方案合理有效,视频监控画面流畅,实时性好。     

面向移动网络的实时视频转码系统

针对宽带IPTV视频源向移动网络和移动终端提供视频服务需要解决的视频转码问题,设计开发以软件方式实现的实时视频转码系统,可将MPEG-4格式的高码率、高分辨率节目源实时转换为适合移动网络和移动终端的低码率、低分辨率视频。在误差补偿转码框架的基础上,提出一种自适应的转码时延保证方法,解决了转码计算复杂性和转码质量均衡的关键技术问题,保证了转码系统的实时性。测试结果表明,实现的转码系统视频转换质量损失少、实时性高。     

移动网络手机实时监控系统的设计与实现

通过分析动力环境实时监控系统的实际需求,结合移动网络、J2ME、Java媒体框架等技术,提出了一个基于移动网络的手机实时监控系统的设计方案.涵盖了图像监控和数字监控两条通道,实现了视频监控、监控数据实时查询、告警和控制命令等功能.针对图像监控通道中高实时性的要求,提出了双缓冲多线程图像捕捉、自缓冲输入流机制、双播放器播放模式等多个创新方法对系统进行优化.最后结合系统在动力环境监控系统中应用案例,表明了系统的可行性和可靠性,且系统具有较高的性能.     

Only connect: teaching, technology and telesis

Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.     

European Community policy and the market

Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.     

一种自适应子融合集成多分类器方法

融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。     

Avoiding semantic and temporal gaps in developing software intensive systems

Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.     

基于QTE的蒙古文显示机制研究与实现

蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。     

Designing economic np control charts: A programmed simulation approach

This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.     

基于AD9626的模拟信号采集存储卡设计

自然界的绝大部分信号都是以模拟的形式存在,因此模拟信号的采集转换存储在数字时代十分关键。文章讨论了在雷达信号处理领域基于AD9626的AD采集存储卡的设计原理、硬件结构和程序设计与芯片配置等问题,为今后相关领域的研究提供了可参考的方案。     

The development of robot art

Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008     

煤矿井下安全监控分站的设计及其仿真实现

为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.     

A human-computer interface for non-computer specialists

The COM teleconferencing system was designed to be easy to use for both beginners and people with much computer experience. A number of design choices in organizing the human-computer interface were considered very carefully. These design problems are not unique for teleconferencing applications, but will appear in many other developments of human-computer interfaces for non-computer specialists. This report discusses naming conventions, menu format, user commands, help facility and the treatment of ‘type ahead’ from the users.