Table 6 The partial contribution of LP filtering and spectral valleys (SV) on LVCSR task, WER [%]
From: Advanced acoustic modelling techniques in MP3 speech recognition
| Bit-rate | 128k | 32k | 28k | 24k | 20k | 16k | 12k | |
|---|---|---|---|---|---|---|---|---|
| f cut | 7200 Hz | 5800 Hz | 5600 Hz | |||||
| PLP | SV | 14.16 | 14.28 | 14.45 | 14.22 | 14.43 | 14.96 | 16.68 |
| Low-pass | 14.22 | 14.34 | 14.54 | |||||
| MFCC | SV | 14.35 | 14.91 | 14.89 | 14.94 | 15.56 | 16.18 | 19.7 |
| Low-pass | 14.15 | 14.45 | 14.86 | |||||