On the effect of snr and superdirective beamforming in speaker diarisation in meetings

Erich Zwyssig, Steve Renals, Mike Lincoln
2012 2012 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)  
On the effect of SNR and superdirective beamforming in speaker diarisation in meetings Citation for published version: Zwyssig, E, Renals, S & Lincoln, M 2012, 'On the effect of SNR and superdirective beamforming in speaker diarisation in meetings'. ABSTRACT 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
more » ... r sensor performance. We present superdirective 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. Index Terms-Speaker diarisation in meetings, digital MEMS microphone array, time difference of arrival (TDOA), superdirective beamforming
doi:10.1109/icassp.2012.6288839 dblp:conf/icassp/ZwyssigRL12 fatcat:gwj7lwf6rrbejccouagwoqksau