Table 7 BER values due to Stirmark ® attacks
From: An imperceptible and robust audio watermarking algorithm
Stirmark attack | Extracted watermark (pop) | Pop audio | Instrumental audio | Speech audio | Average BER |
|---|---|---|---|---|---|
AddBrumm (55Â Hz Sinus) |
| 0 | 0 | 0 | 0 |
AddSinus (3000Â Hz sinus) |
| 0 | 0 | 0 | 0 |
AddNoise (20Â dB level) |
| 0 | 0 | 0 | 0 |
Stat1 (statistical distortion) |
| 0 | 0 | 0 | 0 |
Stat2 (statistical distortion) |
| 0 | 0 | 0 | 0 |
Smooth1 (simple smoothing) |
| 0.80 | 1.40 | 0.36 | 0.853 |
Smooth2 (simple smoothing) |
| 0.65 | 1.34 | 0.29 | 0.760 |
Amplify (increases amplitude) |
| 0 | 0 | 0 | 0 |
Invert (phase shift 180°) |
| 0 | 0 | 0 | 0 |
Exchange (swaps samples) |
| 5.01 | 5.54 | 3.68 | 4.74 |
CutSamples (7 samples per 1,000) |
| 2.41 | 3.11 | 1.08 | 2.20 |
LSBZero (reset LSBs) |
| 0 | 0 | 0 | 0 |
ZeroCross (reset samples) |
| 0 | 0 | 0 | 0 |
ZeroRemove (removes 0 samples) |
| 0 | 0 | 0 | 0 |
