A Steganography Method for G.729a Speech Coding

Fufang Li, Binbin Li, Liangchen Liu, Yuanyong Feng, Lingxi Peng

Table 4 The PESQ score and its percentage under different hiding processing scenarios of gain coding adjustment

Experiment condition	boy voice	girl voice	male singing	female singing	Chinese music	western music
No confidential information embedded	2.841425	2.962733	3.287391	2.910467	2.876323	2.917364
Information hiding of gain bit +1 processing	1.974506	1.888446	2.151926	1.921781	2.049955	2.111880
Information hiding of gain bit +1 processing	69.49%	63.74%	65.46%	66.03%	71.27%	72.39%
Information hiding of gain bit -1 processing	2.112599	2.010807	2.292298	2.086514	2.089073	2.152723
Information hiding of gain bit -1 processing	74.35%	67.87%	69.73%	71.69%	72.63%	73.79%