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This paper examines the effect of sensor performance on speaker diarisation in meetings and investigates the use of more advanced beamforming techniques, beyond the typically employed delay-sum beamformer, for mitigating the effects of poorer sensor performance. We present super-directive beamforming and investigate how different time difference of arrival (TDOA) smoothing and beamforming techniques influence the performance of state-of-the-art diarisation systems. We produced and transcribed a new corpus of meetings recorded in the instrumented meeting room using a high SNR analogue and a newly developed low SNR digital MEMS microphone array (DMMA.2). This research demonstrates that TDOA smoothing has a significant effect on the diarisation error rate and that simple noise reduction and beamforming schemes suffice to overcome audio signal degradation due to the lower SNR of modern MEMS microphones.
|Title of host publication||Acoustics, Speech and Signal Processing (ICASSP), 2012 IEEE International Conference on|
|Number of pages||4|
|Publication status||Published - 2012|
|Event||ICASSP 2012 - Kyoto, Japan|
Duration: 26 Mar 2012 → 30 Mar 2012
|Period||26/03/12 → 30/03/12|