An implementation of speech steganography for iLBC by using fixed codebook
Zhijun Wu, Sha Yongpeng · 2016
In order to achieve covert communication in low bit rate speech, this paper employs a low bit rate codec which is designed for Internet communication—iLBC, to obtain encoded bitstream, and integrates a codebook partition algorithm for quantization index modulation(QIM) in encoding process to achieve information hiding. According to relative experiments, the method obtains at least 100bps hiding capacity, the loss of PESQ value between original speech and stego speech is less than 1%, indicate that this method has a better speech quality and good imperceptibility.