支持 AltiVec技术的多媒体协处理单元的研究 *

通过对嵌入式处理器进行多媒体处理能力的扩展可增强其对多媒体数据的处理能力。以 32 bit龙腾嵌入式处理器为基础 ,研究 AltiVec技术以及超标量技术 ,设计了该处理器中支持 AltiVec技术的多媒体协处理单元。该单元采用五级流水线 ,将指令动态调度技术分配到不同的流水线中 ,在提高处理性能的同时保证了设计频率。通过多媒体基准程序测试 ,该单元的指令 IPC为 1. 2, SMIC0. 18μm工艺库下 ,频率为 350 MHz,该协处理单元提高了龙腾处理器的性能。     

飞思卡尔QorlQ T4240处理器提供AltiVec软件库

飞思卡尔半导体的旗舰产品QorlOT4240通信处理器开始采用由MentorGraphicsCorporation提供的AltiVec软件库。该信号处理库在新一代AltiVec引擎上运行,使客户能够实现飞思卡尔OorIQT系列处理器的卓越计算性能,同时符合嵌入式计算的容量、重量和功率要求。     

飞思卡尔QorIQT4240处理器提供AltiVec软件库

飞思卡尔半导体的旗舰产品QorIQ T4240通信处理器开始采用由 Mentor Graphics Corporation提供的AltiVec软件库。该信号处理库在新一代AltiVec引擎上运行,使客户能够实现飞思卡尔QorIQ T 系列处理器的卓越计算性能,同时符合嵌入式计算的容量、重量和功率要求。     

基于MPC8641D处理器的对称多处理技术研究

针对当前自动化控制领域对嵌入式计算机性能不断提高的要求,围绕双核PowerPC处理器MPC8641D,开展了双核PowerPC处理器的硬件设计技术和SMP软件技术研究,掌握了一套基于双核PowerPC处理器的通用嵌入式计算平台的软硬件设计技术。     

连续实时信号处理器的性能分析

对AD公司的Tiger SHARC DSP(ADSP-TS101S)和摩托罗拉公司的具有AltiVec矢量处理器核的Power PC系列MPC7410和MPC7455处理器，在连续实时信号处理领域的应用进行了评估。     

多PowerPC 7400/7410处理器体系架构研究

PowerPC 7400/7410处理器是新一代的PowerPC G4处理器,带有高性能的AltiVec单元,其大小为128bits,该单元有利于处理高吞吐量的数据,因此可用来满足完成数字信号处理的要求,成为DSP的强有力替代品.该文通过对4个PowerPC处理器的3种并行体系架构分析和在雷达数字信号处理的性能比较下提出了改进参考模型,以供研究.     

飞思卡尔选择Mentor Graphics来开发其增强Altiec引擎的软件库

飞思卡尔半导体公司选择MentorGraphics Corporation开发包含高级算法和信号处理功能的软件库,该软件库专门针对最新版飞思卡尔AltiVee处理引擎进行优化。面向飞思卡尔AltiVec技术的MentorEmbedded Performance Library旨在帮助飞思卡尔近期推出的QorIQ Advanced Multiprocessing（AMP）处理器利用最新的AltiVec引擎实现性能的最大化,同时使软件开发人员提高生产效率。     

面向医用电子内窥镜的高清视频处理系统

设计一种基于现场可编程门阵列(FPGA)和双数字信息处理器(DSP)的嵌入式高清内窥镜视频处理系统。利用FPGA对视频数据进行预处理,采用2片基于DaVinci-HD技术的DSP进行H.264编解码并行运算,通过PowerPC处理器完成系统管理、视频存储与网络传输。测试结果表明,该系统实时处理的视频分辨率达到1080i60,在图像质量上能达到H.264的高画质级别。     

多处理器雷达系统监控程序的设计和实现

本文介绍了一种基于多PowerPC处理器高速信号处理系统的Host监控程序的设计和实现,该监控程序基于Solaris,实现了对雷达信号处理中间结果的实时监控和显示。该程序利用Host与PowerPC处理器间的共享内存实现了数据通信,利用多线程监控来获取多个处理器的运算结果,并使用GTK+提供的库函数建立了雷达监控系统的图形化界面,实现了对多个PowerPC处理器处理结果的显示和更新。其方法也可用作设计和实现其他目的的多处理器系统的监控程序的参考。     

G4通信效率增一倍

采用Linux操作系统(Linux OS)的嵌入式系统开发商现在可以充分利用AltiVec技术来提升他们的网络与通信设备的性能。摩托罗拉公司已经开始提供免费下载的AltiVec技术源代码库,以支持Linux OS中经常使用的功能。该代码库可帮助Linux OS开发商提升他们基于     

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.