An 8-32 kbit/s scalable wideband coder extended with MDCT-based bandwidth extension on top of a 6.8 kbit/s narrowband CELP coder. - Masahiro Oshikiri; Hiroyuki Ehara; Toshiyuki Morii; Tomofumi Yamanashi; Kaoru Satoh; Koji Yoshida (INTERSPEECH, 2007)

Superwideband extension of g.718 and g.729.1 speech codecs. - Lasse Laaksonen; Mikko Tammi; Vladimir Malenovsky; Tommy Vaillancourt; Mi Suk Lee; Tomofumi Yamanashi; Masahiro Oshikiri; Claude Lamblin; Balázs Kövesi; Lei Miao 004; Deming Zhang; Jon Gibbs; et al. (INTERSPEECH, 2010)

Low Bit-Rate High-Quality Audio Encoding and Low Complexity Bandwidth Extension Technologies for ITU-T G.718/G.718-SWB. - Tomofumi Yamanashi; Masahiro Oshikiri; Hiroyuki Ehara (ICC, 2011)