基于Internet的可回放式语音教学系统的开发
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摘要
当今的社会是一个信息化的社会，人们对知识的要求越来越高。而现有的以课堂教学为主、面对面的传统教学模式因为受到时间和空间等诸多因素的限制，已经远远不能满足人们对知识的渴求。而网络教育作为一种新兴的教学模式，能使有限的教学资源被最大化的利用，并具有不受时空限制和个性化教学的特点，所以更符合信息化时代的要求。
网络教育即基于Internet的远程教育。它结合多媒体技术、数据库技术和网络技术将传统教室搬到网上，使人们可以随时随地进行学习。但是现在的基于Internet的远程教学系统缺乏教师和学生交互的手段，随着技术的发展，人们希望网络教育同样能像传统课堂那样能和教师进行语言交流甚至视频的交互。正是在这种情况下，我们在已有的远程教学系统BlueGLAS的基础上开发了“基于Internet的可回放式语音教学系统(Internet-based Recordable Voice Teaching System)”。
本文阐述了该系统的设计思路和步骤，分析了它的技术特点，并讲述了它的实现功能和不足，由此说明一个典型的基于Internet的交互式教学系统所必须具备的元素，并对其将来的发展趋势做了展望。
全文分为五章。引言部分讲述了网络教育的产生背景；第一章是网络教育的现状分析和前景，介绍了它的发展阶段、表现形式、优点、阻碍其发展的因素和网络教育在中关两国的发展情况；第二章勾画了一个完整的远程教学系统，并以美国BlueShoe公司和本院计算中心合作开发的软件BlueGLAS为例，说明了一个典型网络教学系统的结构和模块划分；第三章是技术背景的整体介绍，将涉及到面向对象的技术、COM技术、网络通讯和WinSock的基本概念；第四章是全文的重点，它先讲述本系统采用的UDP协议和多媒体数据声音知识，然后分析了系统的概要设计、模块设计，并给出语音通信部分的实现方法；第五章指出了系统的不足，并对未来交互式教学系统的功能应用做了展望。
Today we live in an information world and people need to update his knowledge constantly in order to catch up with this vast exploring information world. The traditional face-to-face learning approaches are no longer satisfying the need of learning request because of the confinement of the time and the place. The new learning method - Internet based learning and education (E-Learning/E-Education) which makes best use of limited teaching source and without restriction on the time and the place is accepted by the increasing number of people.
Internet Education means internet-based distance education. It puts traditional classroom into internet by means of multimedia, database and internet technology. But current available Internet Education solutions are lack of interaction and tracking on communication between teachers and students. Students want to not just listen to the teachers' voice and they want to replay it once it is needed. Students want to see the teachers' and replay the scene once it is needed again. To facilitate this need, this paper introduce the concept "Internet-based Recordable Voice Teaching System(RVTS)" in accordance with sample distance education system桞lueGLAS.
This paper describes the concept and design method of RVTS, analyzes its technical characteristics and discusses its functions as well as future improvement. In conclusion this paper shows the elements of prototype on this internet-based interactive teaching system and picture of its future.
This paper is composed of five chapters. Chapter One introduces Internet Education's development stages, representation form, merits and current development status of Internet Education in China and USA; Chapter Two describes a full distance education system桞lueGLAS and discusses its system architecture; Chapter Three discusses the underlying technologies including Object Oriented technology, COM and WinSock technology; Chapter
Four is the key part of this paper, it discusses the concept and module design of RVTS and also presents the approaches for implementing the voice communication. Chapter Five discusses the future of RVTS and the picture of future interactive teaching system.
网络教育即基于Internet的远程教育。它结合多媒体技术、数据库技术和网络技术将传统教室搬到网上，使人们可以随时随地进行学习。但是现在的基于Internet的远程教学系统缺乏教师和学生交互的手段，随着技术的发展，人们希望网络教育同样能像传统课堂那样能和教师进行语言交流甚至视频的交互。正是在这种情况下，我们在已有的远程教学系统BlueGLAS的基础上开发了“基于Internet的可回放式语音教学系统(Internet-based Recordable Voice Teaching System)”。
本文阐述了该系统的设计思路和步骤，分析了它的技术特点，并讲述了它的实现功能和不足，由此说明一个典型的基于Internet的交互式教学系统所必须具备的元素，并对其将来的发展趋势做了展望。
全文分为五章。引言部分讲述了网络教育的产生背景；第一章是网络教育的现状分析和前景，介绍了它的发展阶段、表现形式、优点、阻碍其发展的因素和网络教育在中关两国的发展情况；第二章勾画了一个完整的远程教学系统，并以美国BlueShoe公司和本院计算中心合作开发的软件BlueGLAS为例，说明了一个典型网络教学系统的结构和模块划分；第三章是技术背景的整体介绍，将涉及到面向对象的技术、COM技术、网络通讯和WinSock的基本概念；第四章是全文的重点，它先讲述本系统采用的UDP协议和多媒体数据声音知识，然后分析了系统的概要设计、模块设计，并给出语音通信部分的实现方法；第五章指出了系统的不足，并对未来交互式教学系统的功能应用做了展望。
Today we live in an information world and people need to update his knowledge constantly in order to catch up with this vast exploring information world. The traditional face-to-face learning approaches are no longer satisfying the need of learning request because of the confinement of the time and the place. The new learning method - Internet based learning and education (E-Learning/E-Education) which makes best use of limited teaching source and without restriction on the time and the place is accepted by the increasing number of people.
Internet Education means internet-based distance education. It puts traditional classroom into internet by means of multimedia, database and internet technology. But current available Internet Education solutions are lack of interaction and tracking on communication between teachers and students. Students want to not just listen to the teachers' voice and they want to replay it once it is needed. Students want to see the teachers' and replay the scene once it is needed again. To facilitate this need, this paper introduce the concept "Internet-based Recordable Voice Teaching System(RVTS)" in accordance with sample distance education system桞lueGLAS.
This paper describes the concept and design method of RVTS, analyzes its technical characteristics and discusses its functions as well as future improvement. In conclusion this paper shows the elements of prototype on this internet-based interactive teaching system and picture of its future.
This paper is composed of five chapters. Chapter One introduces Internet Education's development stages, representation form, merits and current development status of Internet Education in China and USA; Chapter Two describes a full distance education system桞lueGLAS and discusses its system architecture; Chapter Three discusses the underlying technologies including Object Oriented technology, COM and WinSock technology; Chapter
Four is the key part of this paper, it discusses the concept and module design of RVTS and also presents the approaches for implementing the voice communication. Chapter Five discusses the future of RVTS and the picture of future interactive teaching system.
引文
[1]．李学明，李继，魏芳．远程教育系统及其实现．人民邮电出版社．2000
[2]. Robert Summers. Official Microsoft Net Meeting Book. Microsoft Press.
[3]．赵宇．用NetMeeting开发网络会议软件．计算机世界．
[4]．刘聪，郝建英，林士洪，郭玉成．基于NetMeeting的音视频交互式教学环境的开发与实践．北方交通大学．
[5]．陈淑珍，杨涛．基于Internet的远程教学系统的设计与实现．武汉大学．
[6]．林天山．基于Socket的聊天室实现原理．福建泉州数据通信局．
[7]．张小真，廖剑，周竹荣．基于WWW的远程教学系统的构建．西南师范大学．
[8]．陶遵适．计算机网、电视网、电信网的有机结合----第三代远程教育的媒体环境分析．电化教育研究．2000．5
[9]．黄东霖．中国现代化远程教育网的建设与发展．电信科学．1999．2
[10]．吴宏途．浅谈视频媒体在网络教学中的应用与实现．福建师范大学网络中心．
[11]．廖均勇．基于Internet的答疑系统．北京师范大学．
[12]．李英壮，黄宝贵，张晓景．大连理工大学网上教学支持系统的开发和实现．大连理工大学网络中心．
[13]. the Technology of Windows Mediafrom: http://www. microsoft. com/windows/windowsmedia/EN/default. asp
[14]. http://www. webct. com
[15]．Paul DuBois. MYSQL网络数据库指南．机械工业出版社．
[16]．编程高手工作室．Asp编程高手．北京希望电子出版社．
[17]．Wayne S Freeze. Visual Basic开发指南—COM和COM+篇．电子工业出版社，2000
[18]．GuyEddon, HenryEddon. COM+组件编程技术内幕．北京希望电子出版社．
[19]．郝建英，刘聪，郭玉成，林世洪．现代远程教育的技术手段及其实现．北方交通大学．
[20]．汪建元，赖德生，杨纪生，现代远程教育支撑环境软件的设计与实践．
浙江大学．
[21]．蒋东兴等．Windows Sockets网络程序设计大全．清华大学出版社．1999
[22]．钟玉琢．多媒体技术(高级)．清华大学出版社．1999
[23]．朱雪文．美国远程高等教育发展的基本态势分析．中国远程教育．2002．3
[24]．杨帆．Web远程教育的在线交流模型及其实现．中国远程教育．2002．1
[25]．丁婧．网络中等教育现状与需求调查(上)．中国远程教育．2001．11
[26]．王史维．网络环境下的教学交互．中国远程教育．2001．11
[27]．刘俊等．发展网络教育适应多元化的教育需求．中国远程教育．2001．10
[28]．中国高校网．http://www.china-school.net/
[29]．中国人民大学网络教育学院．http://www.cmr.com.cn/
[30]．杨丽萍．远程计算机辅助教学系统的设计．上海海运学院学报．2001．4
[31]．曹贺锋，石雄，杨利民．COM技术在多种编程环境中的应用．软件天地．
[32]．康师友．C++面向对象程序设计简明教程，西安电子科技大学出版社．1998
[33]．邵维忠 杨芙清．面向对象的系统分析．清华大学出版社．广西科学技术出版社．1998
[2]. Robert Summers. Official Microsoft Net Meeting Book. Microsoft Press.
[3]．赵宇．用NetMeeting开发网络会议软件．计算机世界．
[4]．刘聪，郝建英，林士洪，郭玉成．基于NetMeeting的音视频交互式教学环境的开发与实践．北方交通大学．
[5]．陈淑珍，杨涛．基于Internet的远程教学系统的设计与实现．武汉大学．
[6]．林天山．基于Socket的聊天室实现原理．福建泉州数据通信局．
[7]．张小真，廖剑，周竹荣．基于WWW的远程教学系统的构建．西南师范大学．
[8]．陶遵适．计算机网、电视网、电信网的有机结合----第三代远程教育的媒体环境分析．电化教育研究．2000．5
[9]．黄东霖．中国现代化远程教育网的建设与发展．电信科学．1999．2
[10]．吴宏途．浅谈视频媒体在网络教学中的应用与实现．福建师范大学网络中心．
[11]．廖均勇．基于Internet的答疑系统．北京师范大学．
[12]．李英壮，黄宝贵，张晓景．大连理工大学网上教学支持系统的开发和实现．大连理工大学网络中心．
[13]. the Technology of Windows Mediafrom: http://www. microsoft. com/windows/windowsmedia/EN/default. asp
[14]. http://www. webct. com
[15]．Paul DuBois. MYSQL网络数据库指南．机械工业出版社．
[16]．编程高手工作室．Asp编程高手．北京希望电子出版社．
[17]．Wayne S Freeze. Visual Basic开发指南—COM和COM+篇．电子工业出版社，2000
[18]．GuyEddon, HenryEddon. COM+组件编程技术内幕．北京希望电子出版社．
[19]．郝建英，刘聪，郭玉成，林世洪．现代远程教育的技术手段及其实现．北方交通大学．
[20]．汪建元，赖德生，杨纪生，现代远程教育支撑环境软件的设计与实践．
浙江大学．
[21]．蒋东兴等．Windows Sockets网络程序设计大全．清华大学出版社．1999
[22]．钟玉琢．多媒体技术(高级)．清华大学出版社．1999
[23]．朱雪文．美国远程高等教育发展的基本态势分析．中国远程教育．2002．3
[24]．杨帆．Web远程教育的在线交流模型及其实现．中国远程教育．2002．1
[25]．丁婧．网络中等教育现状与需求调查(上)．中国远程教育．2001．11
[26]．王史维．网络环境下的教学交互．中国远程教育．2001．11
[27]．刘俊等．发展网络教育适应多元化的教育需求．中国远程教育．2001．10
[28]．中国高校网．http://www.china-school.net/
[29]．中国人民大学网络教育学院．http://www.cmr.com.cn/
[30]．杨丽萍．远程计算机辅助教学系统的设计．上海海运学院学报．2001．4
[31]．曹贺锋，石雄，杨利民．COM技术在多种编程环境中的应用．软件天地．
[32]．康师友．C++面向对象程序设计简明教程，西安电子科技大学出版社．1998
[33]．邵维忠 杨芙清．面向对象的系统分析．清华大学出版社．广西科学技术出版社．1998