C. Audible MessageAn JPEG metadata format allows to have voice data into JPEG file [10]. However, as explained in previous section, since all metadata information is entirely removed from transcoding process of IMS or SNS, it is impossible to send voice data with the JPEG image file to the receivers. However, as same as the method described in the previous sub-section, Photo Message, audio data can also be encoded by the data embedding method into JPEG image file.