Table 4 Embedding rate estimation under different types of attacks
From: Existence detection and embedding rate estimation of blended speech in covert speech communications
Actual embedding rate (%) | No-attack (%) | The types of attacks | |||
|---|---|---|---|---|---|
Resample (%) | Requantization (%) | Gaussian white noise (25 dB) (%) | G.729 compression encoding (%) | ||
10 | 12.54 | 6.87 | 7.00 | 12.31 | 14.07 |
20 | 21.48 | 15.53 | 16.71 | 22.32 | 14.97 |
30 | 30.13 | 24.68 | 34.06 | 33.31 | 22.58 |
40 | 40.53 | 46.01 | 44.19 | 43.29 | 48.36 |
50 | 51.31 | 56.68 | 54.79 | 52.61 | 58.48 |
60 | 60.23 | 65.89 | 65.18 | 57.41 | 67.31 |
70 | 69.63 | 74.52 | 73.63 | 67.15 | 78.12 |
80 | 81.53 | 82.91 | 83.00 | 77.78 | 86.79 |
90 | 90.43 | 87.88 | 88.35 | 85.87 | 82.98 |
100 | 98.43 | 96.64 | 96.08 | 94.96 | 92.21 |