Table 1.
List of Signal Enhancement Strategies.
| No. | Abbreviation | Algorithm |
|---|---|---|
| 1 | NoPre | no pre-processing |
| 2 | ADM* | adaptive differential microphones |
| 3 | ADM + coh | adaptive differential micro-phones in combination with coherence filter |
| 4 | SCNR* | single-channel noise reduction |
| 5 | fixed MVDR | fixed binaural MVDR beamformer |
| 6 | adapt MVDR | adaptive binaural MVDR beamformer |
| 7 | com PF (fixed MVDR) | common postfilter based on fixed binaural MVDR beamformer |
| 8 | com PF (adapt MVDR) | common postfilter based on adaptive binaural MVDR beamformer |
| 9 | ind PF (adapt MVDR) | individual postfilter based on adaptive binaural MVDR beamformer |
Note. Two algorithms marked with asterisks are established monaural strategies, which were included as reference (ADM) and because they have been used as processing blocks in some of the binaural algorithms (ADM and SCNR). MVDR = minimum variance distortionless response.