基于WAV文件的独奏乐曲信号中的乐谱识别  

Musical score recognition of solo music signal based on WAV file

作　　者：曹西征[1] 刘春红[1] 孙林[1] 

机构地区：[1]河南师范大学计算机与信息技术学院,河南新乡453007

出　　处：《计算机应用》2009年第3期768-770,788,共4页journal of Computer Applications

基　　金：国家自然科学基金资助项目(60873104);河南省科技攻关项目(0624220038082102210107);河南师范大学引进博士科研启动基金(0716)

摘　　要：大多数乐谱识别工作都是在MIDI格式文件下进行的,而音乐数据大多采用音频格式存储,为此讨论一种从WAV音频文件的独奏乐曲信号中识别出乐谱的方法。采用离散余弦变换(DCT)结合能量比对的手段,并提出了一种变化音最少法则:以十六分音符对应的时值作为步长,将乐曲信号分为若干个子段;对每个子段进行一维DCT操作,提取基音频率;对相邻子段进行能量比对,查找音符的端点;利用变化音最少法则,生成乐谱。实验表明此方法具有良好的识别效果。Most work about musical score recognition is based on MIDI format file;however,most musical data are stored in audio frequency format.Therefore,this paper discussed a musical score recognition method from WAV format file including solo music signal,adopted the Discrete Cosine Transform(DCT) combined with energy,and presented a principle of least derived notes.The music signal was divided into several sub-sections and the length of each section was equal to the duration of one semiquaver.The base frequency w...

关 键 词：乐谱识别 WAV文件 离散余弦变换 基音频率 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]