Multimedia information hiding method for AMBTC compressed images using LSB substitution technique

Communication bandwidth plays a significant role in real-time communication. For this, absolute moment block truncation coding (AMBTC) has been popular. An AMBTC based high capacity multimedia data hiding method for covert communication is proposed in this paper. The proposed method applies AMBTC to the host image to get the compressed image in the form of AMBTC trios. The trios are then classified into three categories based on the difference between their quantization levels. The proposed method then adaptively conceals the secret message bits in the bitmaps of the trios based on their type. Additionally, the proposed method conceals two bits of secret data in every combination of quantization levels irrespective of their block types using the LSB substitution technique. The experimental results show that the proposed AMBTC based method is perform better to the other related data hiding based methods in terms of embedding capacity while providing comparable PSNR.