A high-efficiency speech coding algorithm based on ADPCM with multi-quantizer. - Tomohiko Taniguchi; Kohei Iseda; Shigeyuki Unagami; Syozi Tominaga (ICASSP, 1986)

A 16 kbps ADPCM with multi-quantizer (ADPCM-MQ) codec and its implementation by digital signal processor. - Tomohiko Taniguchi; Shigeyuki Unagami; Kohei Iseda; Yukou Mochida; Syozi Tominaga (ICASSP, 1987)

An 8 kbps TC-MQ (time domain compression ADPCM-MQ) speech codec. - Fumio Amano; Kohei Iseda; Koji Okazaki; Shigeyuki Unagami (ICASSP, 1988)

ADPCM with a multiquantizer for speech coding. - Tomohiko Taniguchi; Shigeyuki Unagami; Kohei Iseda; Shoji Tominaga (IEEE J. Sel. Areas Commun., 1988)

CORBA-based network operation system architecture. - Kohei Iseda; Takafumi Chujo; T. Suzuki (NOMS, 1998)

A policy server for an access network (PSAN). - Takao Ogura; Kenichi Fukuda; Kohei Iseda; Masato Okuda (ICC, 2001)