一种有效识别MIDI文件中主旋律音轨的方法  

AN EFFECTIVE METHOD FOR IDENTIFYING THEME SOUNDTRACK IN MIDI FILES

作　　者：叶霖[1] 李雄飞[1] 刘丽娟[1] 武佳薇[1] 

机构地区：[1]吉林大学计算机科学与技术学院,吉林长春130012

出　　处：《计算机应用与软件》2010年第1期48-50,116,共4页Computer Applications and Software

基　　金：国家科技支撑计划项目(2006BAK01A33);吉林省科技发展计划项目(20070321)

摘　　要：互联网上存在着大量的MIDI文件,这使得构建以乐谱信息为存储对象的音乐数据库成为可能。MIDI文件通常由多轨组成,为实现旋律的检索、分析、比较等功能就需要从多轨中提取出主旋律。针对人声音乐,提出一种自动识别MIDI文件中主旋律音轨的方法,该方法先考察MIDI文件的各个音轨,如果该音轨具有旋律特征的片段总长度超过规定阈值,则将其加入到候选音轨集,再通过比较,从中择优选出主旋律音轨。通过测试各种音乐类型的MIDI文件证明了该方法的可行性。There are a large amount of MIDI files in internet,which makes it possible to build up music database which mainly stores score information.MIDI files are commonly composed of multi-track,in order to realise melody searching,analysing,comparing and other functions,it has to extract the theme soundtrack from MIDI files.This paper aims at presenting a method for automatic identification of the theme soundtrack in MIDI files,which is suitable for vocal music.First,the method analyses every soundtrack in MIDI file,if the soundtrack has sections with theme characters which total length exceeds the specified threshold,it will be added into the candidate soundtrack set,and the theme soundtrack would then be selected from candidate track set though optimised comparing.After testing the MIDI files of various styles,this method is proved to be feasible.

关 键 词：旋律搜索 主旋律提取 音乐数据库 MIDI 

分 类 号：TP317[自动化与计算机技术—计算机软件与理论] TP391.41[自动化与计算机技术—计算机科学与技术]