An audio data hiding based on complete complementary codes and its application to an evacuation guiding system. - Tetsuya Kojima; Akihiro Oizumi; Kohei Okayasu; Udaya Parampalli (IWSDA, 2013)

A disaster prevention broadcasting based on data hiding scheme using complete complementary codes. - Tetsuya Kojima; Toru Tachikawa; Akihiro Oizumi; Yoshimasa Yamaguchi; Udaya Parampalli (ISITA, 2014)

Properties of an Emergency Broadcasting System Based on Audio Data Hiding. - Tetsuya Kojima; Akihiro Oizumi; Udaya Parampalli (IIH-MSP, 2015)