The Transfer of Hidden Information in Data in the AMR-WB Codec
Václav Plátěnka, Antonin Mazalek, Zuzana Vranova · 2019
In order to hide communication in a voice channel, this paper employs an Adaptive Mode Rate Wide Band codec (G.722.2). By deliberately damaging selected bits and a combination of them in a voice frame, a steganographic channel was created with a capacity of up to 2500 b/s without damaging the voice quality significantly. A number of tests based on the subjective evaluation of the voice quality were carried out to confirm the proposed method. PRNG was used to damage the bits. The findings showed the simplicity, effectiveness and speed of the proposed model.