Research Article
A Novel AMR-WB Speech Steganography Based on Diameter-Neighbor Codebook Partition
Table 1
MOS-LQO scores of the standard codec, CNV-based, NID-based, and our proposed steganography in four different rate modes and three embedding rates.
| Embedding rate | Method | Rate mode (kbit/s) | 12.65 | 15.85 | 19.85 | 23.85 |
| | Standard | 2.929 | 3.073 | 3.199 | 3.269 |
| 100 bps | CNV | 2.871 | 3.021 | 3.153 | 3.225 | | | | | NID | 2.750 | 2.895 | 3.020 | 3.091 | | | | | Ours | 2.864 | 3.010 | 3.139 | 3.216 | | | | |
| 200 bps | CNV | / | / | / | / | NID | 2.601 | 2.736 | 2.875 | 2.921 | | | | | Ours | 2.807 | 2.955 | 3.084 | 3.164 | | | | |
| 300 bps | CNV | / | / | / | / | NID | 2.284 | 2.386 | 2.475 | 2.533 | | | | | Ours | 2.699 | 2.841 | 2.971 | 3.046 | | | | |
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