| 摘要 |
<p>PROBLEM TO BE SOLVED: To accurately estimate what kind of acoustic elements an acoustic event included in time-series data of an acoustic signal is constituted from the time-series data.SOLUTION: An acoustic feature quantity component C^ is determined, Z^ representing what is a state of a basis, or that the state of the basis is a new state is determined at each time t, H^ representing a basis spectrum at each state k of the basis is determined, presence/absence of each acoustic event at a part of time tn to each of L preliminarily given acoustic events l is determined based on X^, U^ representing presence/absence of sound production of each time t is determined, a transition probability ais determined, a transition probability bis simultaneously determined, weight w^ of each of D acoustic elements d to each of the L acoustic events l is calculated, an accuracy parameterαto each of the L acoustic events is calculated, each processing is repeatedly performed until a predetermined convergence condition is satisfied, and C^, Z^, H^, U^ and w^ are output.</p> |
