发明名称 |
Reverberation reduction device and reverberation reduction method |
摘要 |
A reverberation reduction device includes, a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, calculating reverberation characteristics in response to an impulse response of a path of a sound from an audio output unit to an audio input unit by determining the impulse response from a first audio signal and a second audio signal that represents a sound that the audio input unit has picked up from the first audio signal reproduced by the audio output unit, and estimating a distance from the audio input unit to a sound source in accordance with at least one of a volume and a frequency characteristic of a third audio signal that represents a sound that the audio input unit has picked up from a sound from the sound source; correcting the reverberation characteristics so that the reverberation characteristics. |
申请公布号 |
US9160404(B2) |
申请公布日期 |
2015.10.13 |
申请号 |
US201213674479 |
申请日期 |
2012.11.12 |
申请人 |
FUJITSU LIMITED |
发明人 |
Togawa Taro;Otani Takeshi;Suzuki Masanao |
分类号 |
H04B3/20;G10L21/0264;G10L21/0208;G10L21/0232 |
主分类号 |
H04B3/20 |
代理机构 |
Staas & Halsey LLP |
代理人 |
Staas & Halsey LLP |
主权项 |
1. A reverberation reduction device comprising:
a processor; and a memory which stores a plurality of instructions, which when executed by the processor, cause the processor to execute, calculating reverberation characteristics in response to an impulse response of a path of a sound from an audio output unit to an audio input unit by determining the impulse response from a first audio signal and a second audio signal that represents a sound that the audio input unit has picked up from the first audio signal reproduced by the audio output unit, estimating a distance from the audio input unit to a sound source in accordance with at least one of a volume and a frequency characteristic of a third audio signal that represents a sound that the audio input unit has picked up from a sound from the sound source; correcting the reverberation characteristics so that the reverberation characteristics become larger as the estimated distance becomes longer; and estimating a frequency spectrum of a reverberation component included in the third audio signal in response to the corrected reverberation characteristics; and attenuating the third audio signal more as a difference between the frequency spectrum of the third audio signal and the frequency spectrum of the reverberation component becomes smaller. |
地址 |
Kawasaki JP |