基于协同标注的教学视频管理系统的设计与实现

发布时间：2018-03-20 05:22

本文选题：教学视频　切入点：协同标注　出处：《武汉体育学院》2017年硕士论文　论文类型：学位论文

【摘要】：在多媒体教学中,视频资料因其形象、直观、获取便利等特点逐渐成为多媒体教学中的主力军。随着多媒体技术和数据压缩技术的发展,视频数量在不断增加,视频内容也越来越丰富。基于用户希望从大量的视频中准确快速地找到包含特定内容的视频剪辑的需要,视频数据的管理和有效的组织具有很广泛的应用前景。传统的教学视频管理系统存在以下问题:首先,海量视频数据的组织与管理是一个复杂的问题,需要权衡效率和数据一致性的问题;其次,多用户对视频内容的分析、标注时会出现重复标注和恶意标注的情况;再次,传统的系统只是提供在线服务,但不排除有时候需要提供离线、便携服务。针对以上问题,本文分别提出了相应的解决方案,实现了基于协同标注的教学视频管理系统。对于视频文件与标注信息一致性问题,开发了基于FileSystemWatcher的Windows服务来保证当视频文件出现移动、更名、删除情况时,数据库中的视频描述情况同步更新,视频标注信息不会由于这些事情的发生失效,保证了视频数据库的不间断有效服务的特性。针对多用户协同标注过程中可能出现的“重复标注”、“补充标注”和“恶意标注”等情况,提出了一套完整的处理机制来对其进行分类处理,以此来保证标注信息的有效性。对于重复标注和补充标注,系统通过设置阀值判断视频片段的起止时间的交叠程度和基于编辑距离的文本相似度来自动处理。对于恶意标注系统分两种情况处理:对于客人用户的恶意标注,通过客人“预标注”,主人“审核”的方式进行排除;对于主人用户的恶意标注,通过其他用户举报,系统管理员核实处理的方式解决。对于教学视频有时候需要在非网络环境使用的情况,实现了选择性导出标注信息的功能并开发实现了能够读取导出标注信息的视频播放工具,以此来提供带标注信息的视频信息的离线、便携服务。本文研究的基于协同标注的教学视频管理系统,把现有海量的教学视频进行数字化处理,并依据协同标注的原则对其进行内容分析、管理等,从而最大程度实现教学视频资源的内容挖掘、共享和推广等服务功能。通过此教学视频管理系统可提高教育教学质量,更好地辅助教师开展教学工作,对教育教学信息化水平的提高具有良好的应用效果,更好地为学校的教育教学信息化建设做出贡献。
[Abstract]:In multimedia teaching, video material has become the main force in multimedia teaching because of its image, intuition and convenience. With the development of multimedia technology and data compression technology, the number of video is increasing. Video content is also getting richer. Based on the need for users to accurately and quickly find video clips containing specific content from a large number of videos, The traditional instructional video management system has the following problems: firstly, the organization and management of mass video data is a complex problem. The need to balance efficiency and data consistency; second, multi-user analysis of video content, tagging will occur in duplicate and malicious tagging; third, the traditional system only provides online services, However, sometimes it is necessary to provide off-line and portable services. In view of the above problems, this paper proposes corresponding solutions, and implements a teaching video management system based on cooperative annotation. A Windows service based on FileSystemWatcher is developed to ensure that the video description in the database is updated synchronously when the video file appears moving, renaming and deleting, and the video tagging information will not be invalidated because of these events. It ensures the continuous and effective service of video database. In view of the situation of "repeat annotation", "supplementary annotation" and "malicious annotation" that may occur in the process of multi-user cooperative tagging, etc. In this paper, a complete processing mechanism is proposed to classify and process the information in order to ensure the validity of the tagging information. The system automatically processes by setting the threshold to judge the overlap of the beginning and ending time of the video segment and the text similarity based on the editing distance. For the malicious tagging system, there are two kinds of processing: the malicious tagging of the guest user. Through the guest "pre-mark", the host "audit" way to exclude; for the host user's malicious tagging, through other users to report, The system administrator verifies the processing way to solve. For the teaching video sometimes needs to use in the non-network environment, has realized the function of selectively exporting the annotated information, and has developed and realized the video playback tool which can read and export the annotated information. In order to provide off-line and portable services for video information with annotated information, this paper studies a teaching video management system based on cooperative annotation, which digitizes the existing mass of instructional video. According to the principle of cooperative tagging, the content analysis, management and other functions of teaching video resources can be realized to the maximum extent, such as content mining, sharing and promotion, etc. The teaching video management system can improve the quality of education and teaching. Better assist teachers to carry out teaching work, improve the level of education and teaching information has a good application effect, better for the school of education and teaching information construction to make a contribution.
【学位授予单位】：武汉体育学院
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：G434

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