Automatic audio tag classification via semi-supervised canonical density estimation. - Jun Takagi; Yasunori Ohishi; Akisato Kimura; Masashi Sugiyama; Makoto Yamada; Hirokazu Kameoka (ICASSP, 2011)

Suffcient Component Analysis. - Makoto Yamada; Gang Niu 001; Jun Takagi; Masashi Sugiyama (ACML, 2011)