Abstract-Traditional speech information hiding methods
have several disadvantages, for example, constant embedding
amplitude, lower speech quality, higher bit error rate. A novel
speech information hiding method based on Itakura-Saito
measure and psychoacoustic model is proposed. The embedding
amplitude can be controlled by Itakura-Saito measure and
psychoacoustic model together. The host speech is decomposed
by wavelet packet transformation and then mapped into the
critical bands. According to the audio masking threshold, the
embedding amplitude in each subband can be determined. And
then, the adjustment factors can be calculated by Itakura-Saito
measure to control the embedding amplitude in each frame so
that the speech quality is good. The embedding amplitude can
be determined automatically. Experimental results show that
the performance of this method is better than that of the
traditional methods.
