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1. 发明申请

US20110271819A1 MUSIC ANALYSIS APPARATUS 有权
标题翻译：音乐分析装置
公开(公告)号：US20110271819A1
公开(公告)日：2011-11-10
申请号：US13081337
申请日：2011-04-06
申请人： Keita ARIMOTO , Sebastian Streich , Bee Suan Ong
发明人： Keita ARIMOTO , Sebastian Streich , Bee Suan Ong
IPC分类号： G10H1/40
CPC分类号： G10H1/40 , G10H2210/076 , G10H2240/141 , G10H2250/235
摘要： In a musical analysis apparatus, a spectrum acquirer acquires a spectrum for each frame of an audio signal representing a piece of music. A beat specifier specifies a sequence of beats of the audio signal. A feature amount extractor divides an interval between the beats into a plurality of analysis periods such that one analysis period contains a plurality of frames, and separates the spectrum of the frames contained in one analysis period into a plurality of analysis bands so as to set a plurality of analysis units in one analysis period in correspondence with the plurality of the analysis bands, such that one analysis unit contains components of the spectrum belonging to the corresponding analysis band. The feature amount extractor further calculates a feature value of each analysis unit based on the components of the spectrum contained in each analysis unit, thereby generating a rhythmic feature amount that is an array of the feature values calculated for the analysis units and that features a rhythm of the piece of music.
摘要翻译：在音乐分析装置中，频谱获取器获取表示音乐片段的音频信号的每个帧的频谱。节拍指定符指定音频信号的节拍序列。特征量提取器将节拍之间的间隔划分成多个分析周期，使得一个分析周期包含多个帧，并将包含在一个分析周期中的帧的频谱分离成多个分析频带，以便设置在一个分析周期内与多个分析带对应的多个分析单元，使得一个分析单元包含属于相应分析带的频谱的分量。特征量提取器还基于每个分析单元中包含的频谱的分量来计算每个分析单元的特征值，从而生成作为针对分析单元计算的特征值的阵列的节奏特征量，并且具有节奏的音乐。

2. 发明申请

US20090025538A1 Method, Apparatus, and Program for Assessing Similarity of Performance Sound 有权
标题翻译：评估性能相似性的方法，仪器和程序
公开(公告)号：US20090025538A1
公开(公告)日：2009-01-29
申请号：US12177398
申请日：2008-07-22
申请人： Keita ARIMOTO
发明人： Keita ARIMOTO
IPC分类号： G10H7/04
CPC分类号： G09B15/00 , G10H1/0008 , G10H2210/056 , G10H2210/066 , G10H2240/131 , G10H2240/325
摘要： A similarity assessment apparatus is provided for assessing a performance sound based on a model performance sound. In the apparatus, a probability density function generating unit divides data of a performance sound into a sequence of frames each having a predetermined temporal length, and generates a probability density function of a fundamental frequency for each frame of the performance sound. A probability density function providing portion provides a probability density function of a fundamental frequency for each frame of the model performance sound. A similarity assessment unit compares the generated probability density function of a frame of the performance sound with the provided probability density function of a frame of the model performance sound so as to assess a similarity between the performance sound and the model performance sound.
摘要翻译：提供了一种基于模型演奏声音来评估演奏声音的相似性评估装置。在该装置中，概率密度函数生成单元将演奏声音的数据分割为具有预定时间长度的帧序列，并且对于演奏声音的每一帧生成基本频率的概率密度函数。概率密度函数提供部分为模型演奏声音的每个帧提供基频的概率密度函数。相似性评估单元将演奏声音的帧的所生成的概率密度函数与所提供的模型演奏声音的帧的概率密度函数进行比较，以评估演奏声音和模型演奏声音之间的相似性。

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