DVB高标清视频节目串编的设计与实现

发布时间：2019-03-01 10:38

【摘要】：随着数字广播电视技术的巨大发展,各级电视台创建了越来越多的电视频道,由此要求有更多的视频媒体来满足各级电视台的节目需求,从而要求电视台扩大媒体节目的来源范围,使其从单一的经国家许可的影视制作方扩展到从网络获取、从国外引进,乃至从小的制片方或者业余的摄影爱好者中购买,这些途径丰富了节目来源与节目内容,同时也带来诸多的问题,如获取的视频封装格式不适合广电网络的传输与播放;视频文件中存在不宜内容,需要选择性裁剪;视频文件时长过短,需要进行多视频文件串编;媒体文件中存在多数据流时,需对音视频流进行选择与提取等,而国外的视频节目编辑系统售价过高,操作复杂,不适于地方电视台的推广应用。论文以广播电视业中高标清视频节目串编为主要研究对象,阐述了视频节目制作过程中上述问题的解决方法,完成了如下工作:1.通过对编解码器与封装格式的分析,设计了一套支持多种视频封装格式与编码处理方式的分析程序,程序支持文件格式的验证校准与视频文件的参数获取。2.采用获取的视频文件参数信息,设计了多流视频文件的分流的操作,同时在视频文件的处理过程中添加了非线性的处理思想,支持播放与串编处理过程中入点与出点的设定。通过视频文件入出点的设定,能裁剪掉视频文件中的不宜内容,或者将一个视频文件中的多个节目片段串编成一个新的节目文件;此时,将串编操作分成了串编文件输入模块与串编文件输出模块,解决了多视频文件串编时,其封装格式与编码器各不相同的问题,也便于新视频文件时码的重新设定。3.常见的视频处理软件一般采用的是序列精度与视频图像组精度,这满足不了电视台对视频节目处理时的精度要求。本文的播放与串编操作中,实现了帧精度的设计,即完成了帧进帧退、帧定位、帧精度下的视频节目播放与串编处理。4.对所设计的应用成果进行了验证与分析,并与同类型的国内外软件进行了测试对比。
[Abstract]:With the great development of digital radio and television technology, more and more TV channels have been created by TV stations at all levels, which demands more and more video media to meet the program needs of TV stations at all levels. Thus, television stations are required to expand the range of media programmes from a single state-licensed film and television producer to an online acquisition, import from abroad, and even purchase from small producers or amateur photographers. These ways enrich the source and content of the program, but also bring a lot of problems, such as the obtained video encapsulation format is not suitable for the transmission and playback of radio and television networks; There are unsuitable contents in the video file, which need to be cropped selectively, and the video file is too long and too short, so it needs multi-video file serialization. When there are many data streams in the media files, it is necessary to select and extract the audio and video streams. However, the foreign video program editing systems are too expensive and complex to operate, so they are not suitable for the promotion and application of local TV stations. This paper takes the high standard definition video program serialization in the broadcasting and television industry as the main research object, expounds the solutions to the above problems in the process of making the video program, and completes the following work: 1. Based on the analysis of codec and encapsulation format, an analysis program is designed to support many kinds of video encapsulation formats and coding methods. The program supports the verification and calibration of file format and the acquisition of video file parameters. 2. By using the obtained parameter information of video file, the operation of multi-stream video file shunting is designed. At the same time, the nonlinear processing idea is added to the process of video file processing, which supports the setting of point and exit point in the process of playback and serial editing. By setting the input and output points of the video file, the unsuitable contents of the video file can be cut out, or the multiple program segments in a video file can be compiled into a new program file. At this time, the serial editing operation is divided into the serial file input module and the serialized file output module, which solves the problem that the encapsulation format is different from the encoder when the multi-video file is serialized, and it is also convenient to reset the code of the new video file. 3. The common video processing software usually uses the sequence precision and the video image group precision, which can not meet the TV station to the video program processing accuracy requirements. In this paper, the design of frame precision is realized in the operation of playback and serial editing, that is to say, the frame forward and back frame, frame positioning, and video program playback and serial editing under frame precision are completed. 4. The designed application results are verified and analyzed, and compared with the same type of software at home and abroad.
【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】：TN948.13

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