Exact(12)
Interfering speaker cancellation.
The background noise includes an interfering speaker at 90°.
This can be explained by the observation that the SNR estimator uses the interfering speaker as target, such that the SBB attempts to enhance this interfering speaker, reducing the iSNR.
A dedicated signal processing block for interfering speaker cancellation attenuates the cross-talk components of undesired speech.
Given (17) and (18), we have adapted the interfering speaker model and the mixture and created a more matched condition for separation.
Different configurations of the system have been investigated, showing the advantage of the complete speech enhancement system comprising interfering speaker cancellation, cross-talk suppression, and dynamic signal combination.
Similar(48)
However, ICA outputs can still contain strong residual components of the interfering speakers whenever noise or reverberation is high.
Within the ISC block, interfering speakers can be suppressed in a distant target channel by using their dedicated microphone signals as reference for a noise compensation.
In our test conditions, target and interfering speakers are treated symmetrically, e.g., an interferer at 6 dB is considered as a target at −6 dB.
But, transient interferers like indicator noise, outside crossing cars, and speech from interfering speakers may be wrongly assigned to one speaker's activity, e.g., during interfering backseat passengers in a system with only two microphones in the front.
When a number of speakers are simultaneously active, for example in meetings or noisy public places, the sources of interest need to be separated from interfering speakers and from each other in order to be robustly recognized.
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