| 摘要 |
PROBLEM TO BE SOLVED: To ensure that received sound signals outputted by a plurality of microphones do not have sparseness, and prevent the performance of interfering sound suppression or sound source separation from degrading even when there is no amplitude difference between the time-frequency components of these signals.SOLUTION: This automatic mixing device comprises: time-frequency conversion units 10 to 10-n for converting sound signals obtained by a main microphone 1 and a plurality of sub-microphones 10-2 to 10-n into time-frequency components; gain assignment units 70 to 70-n for assigning gain to each sound signal obtained by the plurality of sub-microphones 10-2 to 10-n; a level difference comparison unit 90 for comparing the amplitude of the time-frequency component of the sound signal of the main microphone 1 with the amplitude of the time-frequency component of each sound signal having been assigned gain, and generating a mask pattern; a masking processing unit 30 for masking the time-frequency component of the sound signal obtained by the main microphone 1 using the mask pattern; and a time-frequency synthesis unit 50 for synthesizing the masked sound signals.SELECTED DRAWING: Figure 1 |
