基于DSP和CPLD的脉冲氙灯电流实时采集系统的研制

介绍了基于DSP（数字信号处理器）和CPLD（复杂可编程逻辑器件）为控制核心、MAX125为A／D转换芯片的脉冲多路氙灯负载电流同步采集系统的研制,使用CPLD同时控制多片MAX125来实现了高速多路波形同步采集。详细介绍了波形采集模块的硬件及软件设计,重点分析了MAX125的控制时序和CPLD的控制逻辑。实验结果表明该装置完全能满足系统精度和实时性的要求,已经被成功应用到神光-Ⅲ主机激光装置验证系统的能源组件中,运行可靠、稳定。     

具有液晶显示及语音提示功能的智能电动车设计

为实时获取智能电动车的状态信息,将液晶显示器及语音芯片应用于智能电动车系统。智能电动车由两个模块组成:电动车模块和无线控制模块。无线控制模块向电动车发送命令,电动车依据接收到的命令动作。无线控制模块在发送命令的同时,将命令信息实时显示在液晶显示器上,并通过语音芯片发出语音提示。语音提示部分同时具有现场重录功能。在概要介绍系统组成的基础上,着重分析了液晶显示及语音提示的设计,最后给出了无线控制模块实物图。实际系统运行结果表明,液晶显示和语音播放与无线发射命令同步,语音模块现场重录功能便于实现。     

智能声控电视系统

智能声控系统集语音识别、语音编解码功能于一体 ,具有容量大、识别率高、使用方便等优点 ,可以较好地解决功能控制复杂、记忆频率数量大的难题。该系统不对电视做任何改动 ,能对电视现有的各种功能、频率进行语音控制 ,同时也能满足一家多人同时采样语音使用。1　语音信号处理电路整个电路可分为信号处理单元、系统控制单元和用户界面单元 3个功能模块。1.1　信号处理单元本单元包括数字信号处理器、编解码器和存储器。它采用ＡＤＳＰ2 186Ｌ作为核心芯片 ,该芯片在系统中主要完成语音信号的提取、端点检测和模块匹配 ,同时负责用户记录的…     

可编程交通灯控制系统

本系统以AT89C52单片机系统为核心，分为中央控制模块、电源模块、交通灯转换模块、显示模块（LCD液晶、LED倒计时）、键盘模块、遥控传感模块。主要实现了对道路交通指示灯控制、放行时间、时间倒计时、异常情况处理、LCD提示信息以及显示户外温度、恶劣天气语音提示等智能控制。由于采用模块化设计。本系统硬件具有良好的可升级性和可扩展性。     

基于TTS技术的智能化英语自动翻译系统

提出基于TTS技术的智能化英语自动翻译系统设计研究。选型并配置文音转换器与语音处理器，以此为基础，引入TTS技术(文本分析、韵律控制与语音合成),结合英语翻译需求，设计系统软件模块，包括连续语音自动切分与标注模块、语音韵律控制模块、语音合成模块及语音库裁减模块。通过上述硬件单元与软件模块的设计，实现了智能化英语自动翻译系统的运行。实验数据显示：相较于对比系统，应用设计系统获得的语音韵律控制参数偏差较小，语音自然度因子数值更大，充分表明设计系统英语翻译语音更为精准。     

数字集群通信系统中语音提示模块的设计

由于移动能信系统发展很快,对语音提示的要求也越来越高。主要介绍了语音合成芯片XF1M01的功能、特点,并用它为主要芯片设计一种应用于数学集群通信系统中的语音提示模块,并对语音提示模块的优点作了简单评价。阐述了语音提示模块的组成、工作原理及其软、硬件设计,并给出了XF1MO1芯片的特点和数据传送的两种接口方式。     

基于CPLD的语音报警器设计

针对工业现场存在的语音报警问题,介绍了一种基于CPLD的语音报警器的设计方法。该报警器由CPLD器件FLEX10K10和语音芯片ISD1420等通用器件实现。系统根据需要,可以预先在给定的地址段范围内存入提示、报警等语音信息,也可以实时地将现场语音信息存储在给定段地址,根据系统工作情况播放需要的语音段信息。并给出了实现的硬件电路图和相关软件。试验结果证明这些方法是确实可行的。     

基于单片机STC89C58RD＋C的电梯智能语音系统设计

针对目前多数电梯楼层语音系统使用专门的语音芯片进行设计的一些缺陷,给出了用STC89C58RD C、CPLD、VS1011E和FLASH等器件设计智能化电梯楼层语音系统的具体方法.同时对整个系统的电路原理以及单片机、CPLD和解码器的接口硬件原理作了论述.     

嵌入式CPU外围接口电路的CPLD实现

介绍了一种采用CPLD实现嵌入式CPU外围电路的方法，将数据总线、译码单元、分频电路及逻辑电路集成于一片CPLD，大大缩小了印制板的面积并提高了系统可靠性，同时，由于CPLD的现场可编程特性，整个系统的灵活性显著增强。     

移运通信客户服务中心设计与实现

一、客户服务中心系统物理结构与逻辑结构 客户服务中心的网络物理结构是一个具备高可靠性的组网方案。方案中对核心的设备进行了双机热备份,其他关键设备进行不等量的冷备份。 逻辑结构从概念上定义了系统的组成。同时逻辑结构还定义系统的各个组成部分之间的接口方式。整个客户服务中心可以由９个模块组成。各模块间根据完成的功能不同,和其它模块间也有不同的接口。 １．模块描述 （１）排队机（ＡＣＤ） 自动接续用户的呼入;对呼人用户进行语音提示;对呼入用户进行排队管理;完成呼入用户和坐席台之间的接续。 （２）语音信箱（ＶＭ…     

AAL2分组话音复接器的研究与实现

该文研究在ATM虚通路带宽利用率一定的条件下,AAL2分组话音复接器性能随ATM虚通路输出速率的增加而变化的情况。得出结论:当ATM虚通路带宽利用率一定时,ATM虚通路输出速率越高,AAL2分组话音复接器的分组丢弃概率和平均分组排队时延越小。并提出了一种AAL2分组话音复接器的实现方案。该方案可以随着ATM虚通路输出速率的增加,方便地复接多个E1话音电路上的话音数据。     

Voice over ATM using AAL2 and bit dropping: performance and calladmission control

Asynchronous transfer mode (ATM) adaptation layer 2 (AAL2) has been designed for efficient transport of voice, fax, and voiceband data (VBD) traffic over an ATM virtual circuit. The protocol helps achieve low latency and high bandwidth efficiency while applying suitable compression methods on voice/VBD/fax calls and silence elimination on voice calls. We analyze the performance and capacity of an ATM multiplexer based on AAL2 adaptation. We assume that embedded adaptive differential pulse code modulation (ADPCM) is used to compress voice, and silence elimination is used to achieve statistical multiplexing gain. The embedded ADPCM coding scheme allows selective dropping of less significant bits of voice during congestion in the ATM/AAL2 multiplexer. We compare the call capacities of voice multiplexers with and without bit dropping (BD). The performance models and results presented are based on fairly general assumptions and can be used for traffic engineering and call admission control in land-line or wireless ATM systems for a variety of voice/voiceband compression algorithms. A generalized algorithm for call admission control is also described     

Cells-In-Frames: a system overview

Cells-In-Frames provides an efficient mechanism for integrating both voice and data traffic on an existing campus network that is currently supporting legacy LAN workstations. The solution suggested by this article is to export ATM services within standard LAN frames. Each frame will carry the traffic from one or more ATM cells, but any given LAN frame is associated with only one ATM virtual circuit. The widely different qualities of service required for voice and data traffic is achieved rough the use of AAL1 and AAL5 services. The AAL functions are split appropriately between the workstation and the LAN switch that interfaces to an ATM backbone network. With the use of the Q.2931 signalling protocols defined for ATM, Cells-in-Frames achieves a long-sought-after goal of providing switched networking services to LAN-attached workstations     

A simplified performance evaluation for bursty multiclass trafficin ATM systems

In broadband ISDN with ATM, various kinds of traffic, such as voice, data and video, share the common transmission resource. For such multiclass traffic systems, it is necessary to evaluate the grade of service (GOS) for individual traffic. In particular, for the ATM networks integrating voice and video which are of bursty property and delay sensitive, the individual performance evaluation for the mixed bursty traffic an important problem. The authors propose a simplified evaluation of the individual mean waiting time for the bursty multiclass systems appearing in the ATM network and show numerical examples for voice/video system     

Cash dispensing module

NCR (Manufacturing) Ltd., in Dundee, develops and produces automatic teller machines (ATM) for worldwide markets. It is the world leader in ATM quality and reliability.

This article deals with, in the main, the cash dispensing module located within an ATM. This is a classic mechatronics example with the mechanical conveyor system for note movement controlled by a microprocessor, PROM, RAM, digital and analogue circuits. These in turn are controlled by the main ATM processor, running under an RMX operating system.

The money movement and control mechansims will be addressed, as will the software procedures to ensure accurate note dispensing. To appreciate the manufacturing process discussion of the testing philosophy, the automated assembly line and robotic cell used to assemble the money cassettes is also included.     

话音ATM交换(VOA)──一种现实的网络过渡方案

ATM作为未来B－ISDN的交换方式，具有大容量、综合化及带宽经济的优点，因此64kb／s的话音ATM交换（VOA）技术必将成为现有窄带通信网向未来宽带综合网过渡有效的解决方案之一。本文首先介绍几种基于ATM的话音交换方案，重点将着眼于提出一种64kb／s的话音ATM交换（VOA）的实现模型，该系统包含了传统STM交换与ATM交换间的相互转换，并能有效地解决诸如信元打包时延、信元时延抖动、以及系统带宽利用率等关键环节，本文的最后还将介绍有关话音ATM交换（VOA）技术的其它热点。     

基于CPLD的清分机纸币图像采集系统

介绍了基于CPLD的清分机纸币图像采集控制系统.采用接触式传感器(CIS)SV233A4W对高速运行的钞票进行图像采样,并将采样数据缓存到CPLD内部RAM中,为后续的DSP等图像处理模块提供数据.该系统扩展性强,只需修改内部相关程序就可满足不同应用要求,并可移植到其他图像采集系统.     

A multimedia STM switch prototype

There is no doubt the concept of ATM (asynchronous transfer mode) has gripped the technical community and has raised the hope for truly integrated voice, data, imaging, and video services. Such a dream was never possible before because of the diverse bandwidth requirements of each service type. Existing narrowband switches could not possibly keep up with widely varying channel bandwidth or the enormous aggregate bandwidth required. New methods of signaling would also be required to support new broadband services. The signaling itself might need varying degrees of bandwidth, and would likely be carried in the same stream as the data, yet be easily distinguishable. A common unit of information in the form of a 53 byte cell, including a header that helps determine the final destination of that cell, was adopted as the broadband integrated services digital network (B-ISDN) standard. While a great deal of work has progressed on ATM since the standard was adopted, there remains a camp that voices concerns as to the technical challenges that face deployment of ATM for certain services. In particular, concerns have been raised questioning the use of ATM networks to effectively route traffic that is constant-bit-rate (CBR) in nature and highly correlated. Voice and video services are of particular interest because of their potential economic markets. While it is almost certain that ATM, given enough time and resources, will prove its ability to handle these services, it behooves us to look for alternatives based on experience with existing telecommunications products. We present work completed in this area     

基于TC35和CPLD的无人值守仓库监控系统设计

以往无人值守监控系统多采用有线结构，在距离很远时，非常的不方便。本文介绍由CPLD及TC35构成的基于短消息的无人值守监控系统，该系统上位机操作简单，下位机以CPLD为核心，可以很方便的进行功能扩展和系统升级。系统结构简单，工作稳定。