基于流媒体技术的教学视频点播系统的设计与实现

发布时间：2018-05-18 20:20

本文选题：信息化 + 视频点播　；参考：《电子科技大学》2013年硕士论文

【摘要】：教育信息化是高校传统教学手段的变革，运用现代教学技术手段开展教学活动，提高教学质量是教育信息化改革的主要目的，随着网络通讯、多媒体技术的发展，基于网络的多媒体视频教育、在线课堂等以其丰富的信息资源、友好的交互性能以及优良的开放性等特点逐渐发展成为比较成熟的新型教育形式。网络视频教学资源应用以其内容丰富、应用快捷、定位准确的优势得到高校的推动，结合传统教育网络资源进行网络学习和实时交流，网络视频信息为学生的学习提供生动、真实的场景。视频点播利用校园网和视频技术的优势，以自适应的方式按需播放，没有时间、地点、空间的限制，改变学生观看教学视频的被动方式。本文通过对教学视频点播技术的研究，利用流媒体技术对视频教学资源进行规范处理，构建具有实时交互功能的视频教学资源点播系统，应用于高校教学活动，为学生提供“面对面”学习的环境。论文采用了基于.net技术的B/S三层结构的教学视频点播系统解决方案，确定系统的实现模式和实现技术。利用DirectShow技术对视频流进行采集处理、解码回放，采用双队列缓冲技术保证流式传输方式的视频数据传输顺序、可靠。系统采用面向对象思想设计，功能完善、界面友好，保护制作者的知识产权。设计点播线程分配机制缓解视频服务器负载，并对不同带宽的客户端进行测试，，保证视频流文件在网络传输的稳定速率控制。该系统的设计技术先进、通用性强、稳定可靠，普遍适用于各高校网络教学平台，通过该平台可以将优秀教师的课堂进行网络实时传送，使学生犹如置身现场，打破了空间的局限性，真正达到视频资源共享。
[Abstract]:Education informatization is the change of traditional teaching means in colleges and universities. The main purpose of educational informatization reform is to use modern teaching technology to carry out teaching activities and improve teaching quality. With the development of network communication and multimedia technology, Web-based multimedia video education, online classroom and so on, with its rich information resources, friendly interactive performance and excellent openness, has gradually developed into a relatively mature new form of education. The application of network video teaching resources is promoted by colleges and universities because of its rich content, fast application and accurate positioning. Combined with traditional educational network resources, network learning and real-time communication are carried out. The network video information provides vividness for students' learning. A real scene. VOD makes use of the advantages of campus network and video technology to play on demand in an adaptive way, without time, place, and space constraints, and changes the passive way for students to watch instructional video. Based on the research of instructional VOD technology, this paper uses streaming media technology to normalize the video teaching resources, and constructs a VOD system with real-time interactive function, which is applied to the teaching activities in colleges and universities. Provide a "face to face" learning environment for students. In this paper, we adopt the B / S three-layer structure based on. Net technology to solve the system of instructional video on demand, and determine the realization mode and technology of the system. The video stream is collected and processed by DirectShow technology, decoded and played back, and the technology of double queue buffer is used to ensure the sequence and reliability of video data transmission in streaming mode. The system adopts object-oriented design, perfect function, friendly interface and protects the intellectual property of the producer. An on-demand thread allocation mechanism is designed to alleviate the load of the video server and test the clients with different bandwidth to ensure the stable rate control of the video stream files in the network. The design technology of this system is advanced, universal, stable and reliable, and it is generally applicable to the network teaching platform of colleges and universities. Through this platform, the excellent teachers' classroom can be transmitted in real time on the network, so that the students can be placed in the scene. Break the limitation of space, really achieve the sharing of video resources.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TP311.52

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