Generation of broadband speech from narrowband speech using piecewise linear mapping. - Yoshihisa Nakatoh; Mineo Tsushima; Takeshi Norimatsu (EUROSPEECH, 1997)

Scalable audio coder based on quantizer units of MDCT coefficients. - Akio Jin; Takehiro Moriya; Takeshi Norimatsu; Mineo Tsushima; Tomokazu Ishikawa (ICASSP, 1999)