远程教学系统课程在线编辑的设计与实现  

Design and implementation of online editing for courses recording in distance education system

作　　者：蔡树敏 郑洪英[2] 陈剑勇[1] 

机构地区：[1]深圳大学计算机与软件学院,广东深圳518060 [2]深圳信息职业技术学院软件学院,广东深圳518172

出　　处：《计算机工程与设计》2014年第6期2230-2233,2249,共5页Computer Engineering and Design

基　　金：国家863高技术研究发展计划基金项目(2013AA01A212);广东省自然科学基金项目(S2011040001331);深圳市科技计划基金项目(JCYJ20120615100614529;JCYJ20120613102750045)

摘　　要：基于Web的远程教学系统具有无需安装任何客户端软件、低带宽资源消耗、低系统资源开销、实时教学和离线点播相结合等优势,因此该类系统现已被广泛接受和认可。为了使用户在录制课程结束后能够简单、快速地裁剪自己所录制的课程内容,保证录制课程发布的质量,提出了课程在线编辑方案。对开源远程教学系统BigBlueButton实时教学时所录制保存的课程内容(文档+语音)进行在线编辑,通过播放时间点的调节,使剪辑后的文档和语音内容能够保持同步播放。实验和应用结果表明,该方案技术上可行、运行效率高,具有较好的应用前景。Web-based distance education system is widely accepted and recognized for its advantages.The system doesn＇t need to install any client software.It has low bandwidth consumption of resources and low system resource overhead.Moreover,it supports real-time teaching and offline video on demand.In order to improve the quality of the released recorded sessions,the solution of online editing for courses is proposed to allow users to cut the recording in a simple and fast way at the end of the course.The online editing solution is tested in the BigBlueButton which is an open source system and is used for real-time distance education.Experiments and applications show that the solution is feasible and efficient.

关 键 词：BigBlueButton 远程教学系统 在线编辑 多媒体同步 音频分割 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]