Directional discrete cosine transforms arising from discrete cosine and sine transforms for directional block-wise image representation. - Tomohiro Ichita; Seisuke Kyochi; Taizo Suzuki; Yuichi Tanaka 001 (ICASSP, 2017)

Audio Source Separation Based on Nonnegative Matrix Factorization with Graph Harmonic Structure. - Tomohiro Ichita; Seisuke Kyochi; Keisuke Imoto (APSIPA, 2018)