数字电视播出字幕实时创编系统

发布时间：2018-05-01 22:38

本文选题：字幕编辑 + 字幕播出　；参考：《电子科技大学》2014年硕士论文

【摘要】：网络化和数字化的发展推动着数字电视技术水平的不断提升,使得电视台对字幕制作软件的要求越来越高。传统的播出字幕创编系统已经不能再满足编辑字幕和播出字幕的需求。为了适应当今字幕制作的需求,很多公司研制出新一代播出字幕创编系统,虽然在一定的程度上满足了要求,但是新型的字幕机系统仍然存在一些问题:1.对于带图像的字幕文件缩放时边缘存在明显的锯齿现象,文本字幕的字体调整的过大时字体边缘也会出现锯齿现象。2.左飞滚动字幕速度不能按需要调整。3.动画字幕和左飞滚动字幕不能够按次连续播放。4.字幕文件模板不能够共享,当多个频道需要播放相同的字幕模板时,用户需要在多个频道分别编辑字幕。本课题研究的目的是针对当今电视台字幕制作的实际需求,设计并实现一款界面优良、功能齐全、性能良好的播出字幕创编系统。同时本课题针对现阶段播出字幕创编系统存在的问题作了分析研究,并给出了相应的解决方案。本文完成的主要工作内容如下:1.字幕编辑模块的设计与实现。在编辑模块能够实现字幕文件的添加;实现字幕文件属性修改的操作;实现字幕文件的预览,包括多字幕预览和单节目预览;实现字幕文件的数据管理,包括字幕保存、上载、下载等功能;实现字幕文件的共享。该模块主要采用了GDIPlus技术、多线程技术。2.字幕播出模块的设计与实现。在字幕播出模块能够实现数据的下载;实现对播出字幕的管理操作,包括字幕文件添加、删除、修改、刷新等操作;实现字幕文件的播放、发送、停止播放等功能。3.字幕渲染效果的实现。采用边缘检测技术和改进的边沿自适应插值算法进行图像字幕缩放,消除图像边缘锯齿现象;采用沿八个方向移位描边的方法,消除文字的锯齿现象。4.对系统进行测试。对系统功能和性能展开测试,测试结果满足预期的要求。该系统在某些电视台以投入使用,通过用户反馈表明它是一套操作界面优美、功能强大、易于操作、性能良好的系统,能够满足电视台制作字幕需求。
[Abstract]:With the development of network and digitalization, the technology level of digital TV is improving continuously, which makes the demand of subtitle making software more and more high. The traditional system can no longer meet the needs of editing and broadcasting subtitles. In order to meet the needs of today's subtitle production, many companies have developed a new generation of subtitle creation system, although to some extent meet the requirements, but the new subtitle machine system still has some problems: 1. The edge of the subtitle file with image is obviously sawtooth while the font of text subtitle is too large and the edge of text subtitle is also sawtooth. 2. The left-flying subtitle speed cannot be adjusted as required. 3. Animation subtitles and left-flying scrolling captions cannot be played sequentially. 4. The subtitle file template cannot be shared. When multiple channels need to play the same subtitle template, users need to edit the subtitles separately on multiple channels. The purpose of this research is to design and implement a subtitle creation system with excellent interface, complete function and good performance. At the same time, this paper analyzes and studies the problems existing in the current system of broadcast subtitle creation, and gives the corresponding solutions. The main work accomplished in this paper is as follows: 1. Design and implementation of subtitle editing module. In the editing module, the subtitle file can be added; the operation of modifying the properties of the subtitle file can be realized; the preview of the subtitle file, including multi-caption preview and single-program preview; the data management of the subtitle file, including the subtitle saving, uploading, and the previewing of the subtitle file are realized. Download and other functions; realize the sharing of subtitle files. This module mainly adopts GDIPlus technology, multithread technology. 2. 2. Design and implementation of subtitle broadcasting module. In the subtitle broadcast module can realize the data download; realize the management operation of the broadcast subtitle, including subtitle file add, delete, modify, refresh and so on; realize the subtitle file play, send, stop play and other functions. 3. The realization of subtitle rendering effect. Edge detection technique and improved edge adaptive interpolation algorithm are used for image subtitle scaling to eliminate the phenomenon of edge sawtooth, and the method of moving edge along eight directions is used to eliminate the sawtooth phenomenon of text. Test the system. The function and performance of the system are tested and the test results meet the expected requirements. The system has been put into use in some TV stations, and it is proved by user feedback that it is a system with beautiful operating interface, powerful function, easy operation and good performance, which can meet the needs of TV stations in making subtitles.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN949.197

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