Spatial and Temporal Position Information Delivery to Mobile Terminals Using Audio Watermarking Techniques

We have been developing audio watermarking techniques which enable extraction of embedded data by mobile phones. Applying acoustic interpolating phenomena of our human auditory organs, we could embed data onto full phone-line frequency ranges, where our auditory response is prominent in order to make possible to extract data with widely used 3-G mobile phones. We are interested in applying this technique to a mobile guidance system in museums. Especially, we are considering applying audio watermarking techniques to synchronizing stored contents of mobile terminals with spatial positions of the terminal and temporal positions of playback contents of its surrounding media. For this purpose, we are developing transferring five linear spatial location identification codes to mobile terminals through 2-channel stereo audio media with watermarks embedded. Also, we are developing transferring time codes continuously to mobile terminals through audio media. In this paper, we present these novel audio watermarking applications of position information delivery to mobile terminals.