On the Design of a High-Performance LSI Circuit Digital Signal Processor for Communication. - Hirohisa Gambe; Toshi Ikezawa; Toshihiko Matsumura; Toshitaka Tsuda; Toshitaka Fujii (IEEE J. Sel. Areas Commun., 1985)

Implementation of a 32 Kbit/s ADPCM Codec Using a General-Purpose Digital Signal Processor. - Toshihiko Matsumura; Hirohisa Gambe; Kazuo Murano (IEEE J. Sel. Areas Commun., 1986)