Dispersed-pulse codebook and its application to a 4 kb/s speech coder. - Kazutoshi Yasunaga; Hiroyuki Ehara; Koji Yoshida; Toshiyuki Morii (ICASSP, 2000)

A candidate for the ITU-T 4 kbit/s speech coding standard. - Jes Thyssen; Yang Gao; Adil Benyassine; Eyal Shlomot; Carlo Murgia; Huan-yu Su; Kazunori Mano; Yusuke Hiwasaki; Hiroyuki Ehara; Kazutoshi Yasunaga; Claude Lamblin; Balázs Kövesi; et al. (ICASSP, 2001)

Efficient spectrum coding for super-wideband speech and its application to 7/10/15 kHz bandwidth scalable coders. - Masahiro Oshikiri; Hiroyuki Ehara; Koji Yoshida (ICASSP (1), 2004)

Noise Post-Processing for Low Bit-Rate CELP Coders. - Hiroyuki Ehara; Kazutoshi Yasunaga; Koji Yoshida; Yusuke Hiwasaki; Kazunori Mano; Takao Kaneko (IEICE Trans. Inf. Syst., 2004)

Design of a Robust LSP Quantizer for a High-Quality 4-kbit/s CELP Speech Coder. - Yusuke Hiwasaki; Kazunori Mano; Kazutoshi Yasunaga; Toshiyuki Morii; Hiroyuki Ehara; Takao Kaneko (IEICE Trans. Inf. Syst., 2004)

Predictive VQ for Bandwidth Scalable LSP Quantization. - Hiroyuki Ehara; Toshiyuki Morii; Masahiro Oshikiri; Koji Yoshida (ICASSP (1), 2005)

Design of bandwidth scalable LSF quantization using interframe and intraframe prediction. - Hiroyuki Ehara; Toshiyuki Morii; Masahiro Oshikiri; Koji Yoshida; Kouichi Honma (INTERSPEECH, 2005)

An energy extrapolation-based concealment algorithm for an erased excitation signal. - Hiroyuki Ehara; Koji Yoshida (IEEE Signal Process. Lett., 2005)

An 8-12 Kbit/S Embedded CELP Coder Interoperable with ITU-T G.729 CIDER: First Stage of the New G.729.1 Standard. - Dominique Massaloux; Romain Trilling; Claude Lamblin; Stéphane Ragot; Hiroyuki Ehara; Mi Suk Lee; Do-Young Kim; Bruno Bessette (ICASSP (4), 2007)

ITU-T G.729.1: AN 8-32 Kbit/S Scalable Coder Interoperable with G.729 for Wideband Telephony and Voice Over IP. - Stéphane Ragot; Balázs Kövesi; Romain Trilling; David Virette; Nicolas Duc; Dominique Massaloux; Stéphane Proust; Bernd Geiser; Martin Gartner; Stefan Schandl; Hervé Taddei; Yang Gao; et al. (ICASSP (4), 2007)

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)

Predictive vector quantization of wideband LSF using narrowband LSF for bandwidth scalable coders. - Hiroyuki Ehara; Toshiyuki Morii; Koji Yoshida (Speech Commun., 2007)

ITU-T EV-VBR: A robust 8-32 kbit/s scalable coder for error prone telecommunications channels. - Tommy Vaillancourt; Milan Jelinek; Ali Erdem Ertan; Jacek Stachurski; Anssi Rämö; Lasse Laaksonen; Jon Gibbs; Udar Mittal; Stefan Bruhn; Volodya Grancharov; Masahiro Oshikiri; Hiroyuki Ehara; et al. (EUSIPCO, 2008)

Decoder Initializing Technique for Improving Frame-Erasure Resilience of a CELP Speech Codec. - Hiroyuki Ehara; Koji Yoshida (IEEE Trans. Multim., 2008)

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)

Study and Practice on Information Technology in an Educational Field Using a Cloud Service and SNS. - Ritsuko Watanabe; Hiroyuki Ehara; Eiji Aoki (CISIS, 2013)

Super-wideband fine spectrum quantization for low-rate high-quality MDCT coding mode of the 3GPP EVS codec. - Srikanth Nagisetty; Takuya Kawashima; Hiroyuki Ehara; Lasse Laaksonen; Hosang Sung; Kihyun Choo (GlobalSIP, 2015)

Overview of the EVS codec architecture. - Martin Dietz; Markus Multrus; Vaclav Eksler; Vladimir Malenovsky; Erik Norvell; Harald Pobloth; Lei Miao 004; Zhe Wang; Lasse Laaksonen; Adriana Vasilache; Yutaka Kamamoto; Kei Kikuiri; et al. (ICASSP, 2015)

Low bit rate high-quality MDCT audio coding of the 3GPP EVS standard. - Srikanth Nagisetty; Zongxian Liu; Takuya Kawashima; Hiroyuki Ehara; Xuan Zhou; Bin Wang; Zexin Liu; Lei Miao 004; Jon Gibbs; Lasse Laaksonen; Venkatraman Atti; Vivek Rajendran; et al. (ICASSP, 2015)

3GPP IVAS Codec - Perspectives on Development, Testing and Standardization. - Stefan Bruhn; Tomas Toftgård; S. Döhla; H.-Y. Su; L. Laaksonen; T. Moriya; Stéphane Ragot; Hiroyuki Ehara; M. Szczerba; Imre Varga; A. Schevciw; Milan Jelinek (ICASSP, 2025)