| 基于MPEG-1/2视频的音频同步剪辑算法 |
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| 引用本文： | 王立平,罗森林,成华.基于MPEG-1/2视频的音频同步剪辑算法[J].北京理工大学学报,2002,22(6):746-749. |
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| 作者姓名： | 王立平 罗森林 成华 |
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| 作者单位： | 1. 北京理工大学,电子工程系,北京,100081;2. 中国科学院,软件技术研究所,北京,100080 |
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| 基金项目： | 国家高技术研究发展计划(863计划);863-306-ZT04-01-4; |
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| 摘 要： | 根据MPEG-1/2码流的特点,实现视音频同步编辑算法.通过对MPEG-1/2视音频码流的分析,利用两者的PTS值实现了基于MPEG-1/2码流PES层的非线性视音频同步编辑,并详述了剪辑算法.该算法无音频编解码操作,实时性好,不存在音频质量损失问题;对于少数次的剪辑同步效果很好.该算法实用性强,现已将该算法模块应用于非线性编辑系统中.
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| 关 键 词： | 非线性编辑 MPEG-1/2标准 音频剪辑算法 |
| 文章编号： | 1001-0645(2002)06-0746-04 |
| 收稿时间： | 2002/1/10 0:00:00 |
| 修稿时间： | 2002年1月10日 |
MPEG-1/2 Based Video and Audio Synchronized Non-Linear Editing Algorithm |
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| Institution: | Dept. of Electronics Engineering, Beijing Institute of Technology, Beijing100081, China;Dept. of Electronics Engineering, Beijing Institute of Technology, Beijing100081, China;Dept. of Electronics Engineering, Beijing Institute of Technology, Beijing100081, China |
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| Abstract: | Non linear editing systems based on MPEG 1/2 tend to replace M JPEG based non linear editing systems. As a result of the structure of the stream, the audio stream editing is very difficult to adapt to the video stream synchronically. A kind of synchronism editing algorithm is provided. Based on an analysis of the construction of the MPEG 1/2 stream, and making use of the PTS parameters of the video, a synchronism editing algorithm is realized. Characters of the algorithm are effective, and there is no audio quality loss because it needs not to code or decode any audio frame, and so it is a fast algorithm. Editing for a limited number of times is even better because of the accumulation of the editing error. |
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| Keywords: | non-linear editing MPEG-2 audio editing algorithm |
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