【摘要】 首先分析了目前网络教学的发展趋势以及使用国产Linux操作系统的意义。然后简要描述了基于MPEG4IP的集成了音视频和教师屏幕数据等多种媒体的同步教学系统设计框架。之后重点分析了同步教学系统中学生客户端课件播放工具的设计方案与基于GTK+图形库的实现机制,并深入探讨了播放器实现中SDL库的运行机制。最后针对系统的不足提出了进一步的研究方向。更多还原

【Abstract】 Firstly the development trend of Web-based Distance Learning and the usage prospect of Linux made in China are analyzed.Then,the design architecture of MPEG4IP-based synchronic teaching system integrating audio,video and screenshot data is described.Based on the architecture,the designs of synchronic courseware player in student end,and its implementation based on GTK+ lib are analyzed.As a part of implementation mechanism,the running principle of SDL lib used in the player tool development is discussed.Finally,the future research issues and direction in this field are summarized.更多还原