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    • 24. 发明专利
    • Information processing device and method, and program
    • 信息处理设备和方法,程序
    • JP2007156434A
    • 2007-06-21
    • JP2006278351
    • 2006-10-12
    • Sony Corpソニー株式会社
    • KOBAYASHI YOSHIYUKI
    • G10H1/20G10G3/04G10H1/00G10H1/40G10L25/06G10L25/51
    • G10H1/0008G10H2210/051G10H2210/061G10H2210/066G10H2250/135G10H2250/235G10L25/48
    • PROBLEM TO BE SOLVED: To analyze a waveform of a musical piece having modulation, using less calculation amount. SOLUTION: A beat feature amount extracting part 41 extracts a feature amount related to a beat in a section of the waveform of the musical piece with modulation divided by each beat; a beat feature amount removal part 42 removes the phase component from the frequency component of the extracted feature amount; a self-correlation map generation part 43 generates self-correlation information, indicating the correlation between a certain section and another section, based on the feature amount from which the phase component has been removed; and thereby, the waveform of the musical piece, having modulation, can be analyzed by using less calculation amount. The present invention is applicable to information processing devices. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:使用较少的计算量来分析具有调制的乐曲的波形。 解决方案:拍子特征量提取部分41通过每个节拍除以音调的波形的一部分提取与节拍相关的特征量; 拍子特征量去除部分42从提取的特征量的频率分量中去除相位分量; 自相关图生成部43基于相位成分被去除的特征量,生成指示特定部与另一部之间的相关性的自相关信息; 从而可以通过使用较少的计算量来分析具有调制的乐曲的波形。 本发明可应用于信息处理装置。 版权所有(C)2007,JPO&INPIT