VoIP Steganography Using iLBC Start State Residuals
Ting-Xiao Miaw, Quincy Wu · 2023
In this paper, we propose a novel approach for information concealment within speech signals encoded using the iLBC codec. Our method leverages the start state's residual samples. We explore the utilization of the 3-bit quantized start state residual signal as an information hiding field. By strategically selecting specific quantization table indices based on the hidden bits, we achieved a remarkable four-fold enhancement in information hiding capacity while maintaining a high level of Perceptual Evaluation of Speech Quality (PESQ). This method offers a flexible balance between capacity and imperceptibility, allowing adaptation according to varying real-world scenarios. This adaptability empowers customization of information hiding techniques, making it highly applicable in diverse contexts.