发明名称 |
SOUND SIGNAL ANALYSIS APPARATUS, SOUND SIGNAL ANALYSIS METHOD AND SOUND SIGNAL ANALYSIS PROGRAM |
摘要 |
A sound signal analysis apparatus 10 includes sound signal input portion for inputting a sound signal indicative of a musical piece; feature value calculation portion for calculating a first feature value indicative of a feature relating to existence of a beat in one of sections of the musical piece and a second feature value indicative of a feature relating to tempo in one of the sections of the musical piece; and estimation portion for concurrently estimating a beat position and a change in tempo in the musical piece by selecting, from among a plurality of probability models described as sequences of states q classified according to a combination of a physical quantity relating to existence of a beat in one of the sections of the musical piece and a physical quantity relating to tempo in one of the sections of the musical piece, a probability model whose sequence of observation likelihoods each indicative of a probability of concurrent observation of the first feature value and the second feature value in corresponding one of the sections of the musical piece satisfies a certain criterion. |
申请公布号 |
US2014260912(A1) |
申请公布日期 |
2014.09.18 |
申请号 |
US201414212022 |
申请日期 |
2014.03.14 |
申请人 |
YAMAHA CORPORATION |
发明人 |
MAEZAWA Akira |
分类号 |
G10H1/40 |
主分类号 |
G10H1/40 |
代理机构 |
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代理人 |
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主权项 |
1. A sound signal analysis apparatus comprising:
sound signal input portion for inputting a sound signal indicative of a musical piece; feature value calculation portion for calculating a first feature value indicative of a feature relating to existence of a beat in one of sections of the musical piece and a second feature value indicative of a feature relating to tempo in one of the sections of the musical piece; and estimation portion for concurrently estimating a beat position and a change in tempo in the musical piece by selecting, from among a plurality of probability models described as sequences of states classified according to a combination of a physical quantity relating to existence of a beat in one of the sections of the musical piece and a physical quantity relating to tempo in one of the sections of the musical piece, a probability model whose sequence of observation likelihoods each indicative of a probability of concurrent observation of the first feature value and the second feature value in corresponding one of the sections of the musical piece satisfies a certain criterion. |
地址 |
Hamamatsu-shi JP |