Some Evaluations on Spectrogram Art Communications Exchanging Secret Visual Messages

This study investigates the possibility of visual communications using spectrogram arts drawn on sound signals. This approach attempts to increase the readability of the communications so that their messages are directly understandable by human users without any advanced decoders. This paper describes some pilot studies of our spectrogram art communication system that exchanges text messages in some chatting services. The experimental results indicate that the proposed technique may have certain appropriateness. It may be employed as a sort of steganography techniques enabling sub-channel communications in a covert manner.