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MODEL ESTIMATION DEVICE, TARGET SOUND ENHANCEMENT DEVICE, MODEL ESTIMATION METHOD, AND MODEL ESTIMATION PROGRAM
MODEL ESTIMATION DEVICE, TARGET SOUND ENHANCEMENT DEVICE, MODEL ESTIMATION METHOD, AND MODEL ESTIMATION PROGRAM
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机译：模型估计装置，目标声音增强装置，模型估计方法和模型估计程序
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摘要
PROBLEM TO BE SOLVED: To achieve sound source separation with higher precision even when a reverberation time is long as compared with a frame length.;SOLUTION: A model estimation device 10A comprises a storage part which stores a parameter of a model for a mixture signal, including reverberation, including a regression matrix showing characteristics of reverberation due to sounds output from a plurality of sound sources. The model estimation device 10A estimates a mixture signal including no reverberation through linear prediction using an observation signal obtained by observing a sound by a plurality of microphones and a regression matrix stored in a storage part. The model estimation device 10A calculates a posterior probability corresponding to a sound source that each time frequency point belongs to from the estimated mixture signal. The model estimation device 10A estimates a parameter from the observation signal, the estimated mixture signal, posterior probability, and parameter stored in the storage part, and updates the parameter stored in the storage part with the estimated parameter. The model estimation device 10A repeats the signal estimation, clustering and parameter estimation until a predetermined condition is met.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2016,JPO&INPIT
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