| 摘要 |
A method of reducing noise in an acoustic system, the method comprising at a first user terminal: receiving an audio signal from at least one further user terminal over a network; executing a communication client on a processing unit, the client configured so as when executed to: supply the audio signal to an audio signal processing module of the first user terminal, wherein the processing module processes the audio signal, whereby a level of gain is applied to the audio signal, and outputs a processed audio signal to a speaker; estimate a noise level of the audio signal and the processed audio signal and estimate the gain applied by the processing module taking into account both the noise level estimates; selectively apply a system gain reduction step to at least one of the audio signal and an audio signal received via a microphone, based on at least the estimated gain. |
| 主权项 |
1. A method of reducing noise in an acoustic system comprising a first user terminal and at least one further user terminal, the method comprising, at the first user terminal:
receiving an audio signal from the at least one further user terminal over a communications network; supplying the audio signal to an audio signal processing module associated with the first user terminal, the audio signal processing module configured to:
process the audio signal whereby a level of gain is applied to the audio signal; andoutput a processed audio signal to an audio output mechanism associated with the first user terminal; estimating a noise level associated with the audio signal and a noise level associated with the processed audio signal, the estimating the noise level associated with the audio signal and the noise level associated with the processed audio signal comprising estimating the noise levels during one or more periods of silence of speech in the audio signal or processed audio signal; and estimating a gain applied by the audio signal processing module based, at least in part, on both the noise level estimates; and selectively reducing a system gain to at least one of the audio signal and a near-end audio signal received via an audio input mechanism associated with the first user terminal, the selectively applying based, at least in part, on at least the estimated gain applied by the audio signal processing module. |
