An audio data hiding based on complete complementary codes and its application to an evacuation guiding system

Information hiding schemes using complete complementary codes (CCCs) have been developed for image data. It has been shown that a high payload and a low bit-error-rate (BER) can be achieved by such data hiding strategies because of the ideal correlation properties of CCCs. In this work, we apply a data hiding scheme based on CCCs to audio signals. Properties such as signal-to-noise ratio (SNR) and BER of the proposed method are investigated through numerical experiments. We also propose to apply the developed data hiding method to an evacuation guiding system. In the proposed system, detailed information on disasters such as earthquakes and tsunamis are embedded into audio signals like sirens. The audio signals in sirens can be processed easily by smartphones and mobile terminals for faster dissemination of disaster information in the community aiding an effective and safe evacucation.