Table 1.
Cutoff frequencies of the A and B bands at four spectral conditions and the relationship of the A and B bands with the eight vocoder bands from Fu and Nogaki (2005).
| Seventy-seven-percent-overlap | A234: Bands 2, 3, and 4 | |||||||
|---|---|---|---|---|---|---|---|---|
| Forty-one-percent-overlap | A345: Bands 3, 4, and 5 | |||||||
| Seventeen-percent-overlap | A456: Bands 4, 5, and 6 | |||||||
| No-overlap | A678: Bands 6, 7, and 8 | |||||||
| B bursts: Bands1234 | ||||||||
| Vocoder band (8-band resolution) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Low cutoff frequency (Hz) | 200 | 359 | 591 | 931 | 1426 | 2149 | 3205 | 4748 |
| (5.84) | (8.77) | (11.86) | (15.08) | (18.39) | (21.77) | (25.17) | (28.62) | |
| High cutoff frequency (Hz) | 359 | 591 | 931 | 1426 | 2149 | 3205 | 4748 | 7000 |
| (32.09) | ||||||||
The cutoff boundaries of the vocoder bands in the ERB scale are shown in parentheses.