Measurement of Objective Intelligibility of Japanese Accented English Using ERJ (English Read by Japanese) Database. - Nobuaki Minematsu; Koji Okabe; Keisuke Ogaki; Keikichi Hirose (INTERSPEECH, 2011)

Robust i-vector extraction tightly coupled with voice activity detection using deep neural networks. - Hitoshi Yamamoto; Koji Okabe; Takafumi Koshinaka (APSIPA, 2017)

Automatic Speech Translation System Selecting Target Language by Direction-of-Arrival Information. - Masanori Tsujikawa; Koji Okabe; Ken Hanazawa; Yoshinobu Kajikawa (EUSIPCO, 2018)

Attentive Statistics Pooling for Deep Speaker Embedding. - Koji Okabe; Takafumi Koshinaka; Koichi Shinoda (INTERSPEECH, 2018)

Attention Mechanism in Speaker Recognition: What Does it Learn in Deep Speaker Embedding? - Qiongqiong Wang; Koji Okabe; Kong Aik Lee; Hitoshi Yamamoto; Takafumi Koshinaka (SLT, 2018)

I4U Submission to NIST SRE 2018: Leveraging from a Decade of Shared Experiences. - Kong Aik Lee; Ville Hautamäki; Tomi H. Kinnunen; Hitoshi Yamamoto; Koji Okabe; Ville Vestman; Jing Huang 019; Guohong Ding; Hanwu Sun; Anthony Larcher; Rohan Kumar Das; Haizhou Li 001; et al. (INTERSPEECH, 2019)

The NEC-TT 2018 Speaker Verification System. - Kong Aik Lee; Hitoshi Yamamoto; Koji Okabe; Qiongqiong Wang; Ling Guo; Takafumi Koshinaka; Jiacen Zhang; Koichi Shinoda (INTERSPEECH, 2019)

Speaker Augmentation and Bandwidth Extension for Deep Speaker Embedding. - Hitoshi Yamamoto; Kong Aik Lee; Koji Okabe; Takafumi Koshinaka (INTERSPEECH, 2019)

I4U Submission to NIST SRE 2018: Leveraging from a Decade of Shared Experiences. - Kong Aik Lee; Ville Hautamäki; Tomi Kinnunen; Hitoshi Yamamoto; Koji Okabe; Ville Vestman; Jing Huang 019; Guohong Ding; Hanwu Sun; Anthony Larcher; Rohan Kumar Das; Haizhou Li 001; et al. (CoRR, 2019)

A Generalized Framework for Domain Adaptation of PLDA in Speaker Recognition. - Qiongqiong Wang; Koji Okabe; Kong Aik Lee; Takafumi Koshinaka (ICASSP, 2020)

NEC-TT Speaker Verification System for SRE'19 CTS Challenge. - Kong Aik Lee; Koji Okabe; Hitoshi Yamamoto; Qiongqiong Wang; Ling Guo; Takafumi Koshinaka; Jiacen Zhang; Keisuke Ishikawa; Koichi Shinoda (INTERSPEECH, 2020)

Speaker Detection in the Wild: Lessons Learned from JSALT 2019. - Leibny Paola García-Perera; Jesús Villalba 001; Hervé Bredin; Jun Du 002; Diego Castán; Alejandrina Cristià; Latané Bullock; Ling Guo; Koji Okabe; Phani Sankar Nidadavolu; Saurabh Kataria 001; Sizhu Chen; et al. (Odyssey, 2020)

NEC-TT System for Mixed-Bandwidth and Multi-Domain Speaker Recognition. - Kong Aik Lee; Hitoshi Yamamoto; Koji Okabe; Qiongqiong Wang; Ling Guo; Takafumi Koshinaka; Jiacen Zhang; Koichi Shinoda (Comput. Speech Lang., 2020)

Task-aware Warping Factors in Mask-based Speech Enhancement. - Qiongqiong Wang; Kong Aik Lee; Takafumi Koshinaka; Koji Okabe; Hitoshi Yamamoto (EUSIPCO, 2021)

I4U System Description for NIST SRE'20 CTS Challenge. - Kong Aik Lee; Tomi Kinnunen; Daniele Colibro; Claudio Vair; Andreas Nautsch; Hanwu Sun; Liang He 003; Tianyu Liang; Qiongqiong Wang; Mickael Rouvier; Pierre-Michel Bousquet; Rohan Kumar Das; et al. (CoRR, 2022)

Generalized Domain Adaptation Framework for Parametric Back-End in Speaker Recognition. - Qiongqiong Wang; Koji Okabe; Kong Aik Lee; Takafumi Koshinaka (IEEE Trans. Inf. Forensics Secur., 2023)