Publications

Journal Papers

2023

Kayo Nada, Keisuke Imoto, and Takao Tsuchiya

Joint Analysis of Acoustic Scenes and Sound Events Based on Multitask Learning with Dynamic Weight Adaptation

Acoustical Science and Technology, Vol. 44, No. 3, pp. 167-175, 2023.
Yuki Shiroma, Yuma Kinoshita, Keisuke Imoto, Sayaka Shiota, Nobutaka Ono, and Hitoshi Kiya

Missing Data Completion of Multi-Channel Signals Using Autoencoder for Acoustic Scene Classification

APSIPA Transactions on Signal and Information Processing, Vol. 12, No. 3, e16, 2023.

2022

Noriyuki Tonami, Keisuke Imoto

Sound Event Triage: Detecting Sound Events Considering Priority of Classes

EURASIP Journal on Audio, Speech, and Music Processing, Vol. 2023, No. 5, pp. 1-13, 2023.
Keisuke Imoto, Sakiko Mishima, Yumi Arai, and Reishi Kondo

Impact of Data Imbalance Caused by Inactive Frames and Difference in Sound Duration on Sound Event Detection Performance

Applied Acoustics, Vol. 196, 108882, 2022.
Yuki Okamoto, Keisuke Imoto, Shinnosuke Takamichi, Ryosuke Yamanishi, Takahiro Fukumori, and Yoichi Yamashita

Onoma-to-wave: Environmental sound synthesis from onomatopoeic words

APSIPA Transactions on Signal and Information Processing, Vol. 11, No. 1, e13, 2022.
Noriyuki Tonami, Keisuke Imoto, Yuki Okamoto, Takahiro Fukumori, and Yoichi Yamashita

Evaluation Metric for Sound Event Detection Considering Severity of Misdetections

Journal of Acoustical Society of Japan, Vol. 78, No. 5, pp. 217-226, 2022. (in Japanese)

2020

Peer-reviewed Conference Papers

2024

Yuki Okamoto, Keisuke Imoto, Shinnosuke Takamichi, Ryotaro Nagase, Takahiro Fukumori, and Yoichi Yamashita

Environmental Sound Synthesis From Vocal Imitations and Sound Event Labels

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 411-415, 2024.
Kevin Wilkinghoff and Keisuke Imoto

F1-EV Score: Measuring the Likelihood of Estimating a Good Decision Threshold for Semi-supervised Anomaly Detection

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 256-260, 2024.

2023

Yoto Fujita, Yoshiaki Bando, Keisuke Imoto, Masaki Onishi, and Kazuyoshi Yoshii

DOA-Aware Audio-Visual Self-Supervised Learning for Sound Event Localization and Detection

Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 2037-2043, 2023.
Ami Igarashi, Shunsuke Tsubaki, Daisuke Niizumi, Daiki Takeuchi, Noboru Harada, and Keisuke Imoto

Joint Analysis of Acoustic Scenes and Sound Events Based on Semi-Supervised Approach

Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 2050-2056, 2023.
Shunsuke Tsubaki, Yohei Kawaguchi, Keisuke Imoto, Tomoya Nishida, Kota Dohi, Takashi Endo, and Yuki Okamoto

Audio-Change Captioning to Explain Machine-Sound Anomalies

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 201-205, 2023.
Noriyuki Tonami, Sakiko Mishima, Reishi Kondo, Keisuke Imoto, and Tomoyuki Hino

Event Classification With Class-Level Gated Unit Using Large-Scale Pretrained Model for Optical Fiber Sensing

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 196-200, 2023.
Keunwoo Choi, Jaekwon Im, Laurie Heller, Mathieu Lagrange, Keisuke Imoto, Yuki Okamoto, Shinnosuke Takamichi, and Brian McFee

Foley Sound Synthesis at the DCASE 2023 Challenge

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 16-20, 2023.
Kota Dohi, Keisuke Imoto, Noboru Harada, Daisuke Niizumi, Yuma Koizumi, Tomoya Nishida, Harsh Purohit, Takashi Endo, Masaaki Yamamoto, and Yohei Kawaguchi

Description and Discussion on DCASE 2023 Challenge Task 2: First-Shot Unsupervised Anomalous Sound Detection for Machine Condition Monitoring

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 31-35, 2023.
Yuki Okamoto, Kanta Shimonishi, Keisuke Imoto, Kota Dohi, Shota Horiguchi, and Yohei Kawaguchi

CAPTDURE: Captioned Sound Dataset of Single Sources

Proc. INTERSPEECH, pp. 1683-1687, 2023.
Hien Ohnaka, Shinnosuke Takamichi, Keisuke Imoto, Yuki Okamoto, Kazuki Fujii, and Hiroshi Saruwatari

Visual Onoma-to-Wave: Environmental Sound Synthesis From Visual Onomatopoeias and Sound-Source Images

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 1-5 2023.

2022

Ami Igarashi, Keisuke Imoto, Yuka Komatsu, Shunsuke Tsubaki, Shuto Hario, and Tatsuya Komatsu

How Information on Acoustic Scenes and Sound Events Mutually Benefits Event Detection and Scene Classification Tasks

Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 7–11, 2022.
Yuki Okamoto, Keisuke Imoto, Shinnosuke Takamichi, Takahiro Fukumori, and Yoichi Yamashita

How Should We Evaluate Synthesized Environmental Sounds

Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 307–312, 2022.
Kota Dohi, Keisuke Imoto, Noboru Harada, Daisuke Niizumi, Yuma Koizumi, Tomoya Nishida, Harsh Purohit, Takashi Endo, Masaaki Yamamoto, and Yohei Kawaguchi

Description and Discussion on DCASE 2022 Challenge Task 2: Unsupervised Anomalous Sound Detection for Machine Condition Monitoring Applying Domain Generalization Techniques

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 31-35, 2022.
Rie Koga, Sawa Takamuku, Keisuke Imoto, and Naotake Natori

Model Training that Prioritizes Rare Overlapped Labels for Polyphonic Sound Event Detection

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 56-60, 2022.
Shunsuke Tsubaki, Keisuke Imoto, and Nobutaka Ono

Joint Analysis of Acoustic Scenes and Sound Events with Weakly labeled Data

Proc. International Workshop on Acoustic Signal Enhancement (IWAENC), pp. 1-5, 2022.
Yukiko Takahashi, Sawa Takamuku, Keisuke Imoto, and Naotake Natori

Semi-supervised Domain Adaptation for Acoustic Scene Classification by Minimax Entropy and Self-supervision Approaches

Proc. International Workshop on Acoustic Signal Enhancement (IWAENC), pp. 1-5, 2022.
Yuki Shiroma, Yuma Kinoshita, Keisuke Imoto, Sayaka Shiota, Nobutaka Ono, and Hitoshi Kiya

Missing Data Recovery Using Autoencoder for Multi-Channel Acoustic Scene Classification

Proc. European Signal Processing Conference (EUSIPCO), pp. 767-771, 2022.
Yuki Okamoto, Shota Horiguchi, Masaaki Yamamoto, Keisuke Imoto, and Yohei Kawaguchi

Environmental Sound Extraction Using Onomatopoeia

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 221-225, 2022.
Noriyuki Tonami, Keisuke Imoto, Ryotaro Nagase, Yuki Okamoto, Takahiro Fukumori, and Yoichi Yamashita

Sound Event Detection Guided by Semantic Contexts of Scenes

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 801-805, 2022.

2021

Kayo Nada, Keisuke Imoto, Reina Iwamae, and Takao Tsuchiya

Multitask Learning of Acoustic Scenes and Events Using Dynamic Weight Adaptation Based on Multi-Focal Loss

Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 1156–1160, 2021.
Yuki Shiroma, Keisuke Imoto, Sayaka Shiota, Nobutaka Ono, and Hitoshi Kiya

Investigation on Spatial and Frequency-based Features for Asynchronous Acoustic Scene Analysis

Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 1161–1166, 2021.
Yohei Kawaguchi, Keisuke Imoto, Yuma Koizumi, Noboru Harada, Daisuke Niizumi, Kota Dohi, Ryo Tanabe, Harsh Purohit, and Takashi Endo

Description and Discussion on DCASE2021 Challenge Task2: Unsupervised Anomalous Sound Detection for Machine Condition Monitoring Under Domain Shifted Condition

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 186–190, 2021.
Keisuke Imoto

Acoustic Scene Classification Using Multichannel Observation with Partially Missing Channels

Proc. European Signal Processing Conference (EUSIPCO), pp. 875-879, 2021.
Keisuke Imoto, Sakiko Mishima, Yumi Arai, and Reishi Kondo

Impact of Sound Duration and Inactive Frames on Sound Event Detection Performance

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 860-864, 2021.
Noriyuki Tonami, Keisuke Imoto, Yuki Okamoto, Takahiro Fukumori, and Yoichi Yamashita

Sound Event Detection Based on Curriculum Learning Considering Difficulty of Events

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 875-879, 2021.

2020

Taiga Kawamura, Ryoichi Miyazaki, Keisuke Imoto, and Nobutaka Ono

Experimental Investigation of Robustness of Spatial Cepstrum Features Under Various Recording Conditions

Proc. Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), pp. 701-704, 2020.
Yuma Koizumi, Yohei Kawaguchi, Keisuke Imoto, Toshiki Nakamura, Yuki Nikaido, Ryo Tanabe, Harsh Purohit, Kaori Suefusa, Takashi Endo, Masahiro Yasuda, and Noboru Harada

Description and Discussion on DCASE2020 Challenge Task2: Unsupervised Anomalous Sound Detection for Machine Condition Monitoring

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 81–85, 2020.
Yuki Okamoto, Keisuke Imoto, Shinnosuke Takamichi, Ryosuke Yamanishi, Takahiro Fukumori, and Yoichi Yamashita

RWCP-SSD-Onomatopoeia: Onomatopoeic Word Dataset for Environmental Sound Synthesis

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 125–129, 2020.
Noriyuki Tonami, Keisuke Imoto, Takahiro Fukumori, and Yoichi Yamashita

Evaluation Metric of Sound Event Detection Considering Severe Misdetections by Scenes

Proc. Detection and Classification of Acoustic Scenes and Events (DCASE) Workshop, pp. 195–199, 2020.
Keisuke Imoto, Noriyuki Tonami, Yuma Koizumi, Masahiro Yasuda, Ryosuke Yamanishi, and Yoichi Yamashita

Sound Event Detection by Multitask Learning of Sound Events and Scenes with Soft Scene Labels

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 621-625, 2020.
Tatsuya Komatsu, Keisuke Imoto, and Masahito Togami

Scene-dependent Acoustic Event Detection with Scene Conditioning and Fake-scene-condition Loss

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 646-650, 2020.
Masahiro Yasuda, Yuma Koizumi, Shoichiro Saito, Hisashi Uematsu, and Keisuke Imoto

Sound Event Localization Based on Sound Intensity Vector Refined by DNN-based Denoising and Source Separation

Proc. IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), pp. 651-655, 2020.
Yuki Okamoto, Keisuke Imoto, Naoki Tsukahara, Ken Nagata, Koh Sueda, Ryosuke Yamanishi, and Yoichi Yamashita

Crow Call Detection Using Gated Convolutional Recurrent Neural Network

Proc. RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP), pp. 171-174, 2020.

Award

2023

Takezo Ohta

Best Student Presentation Award for the 86th National Convention of IPSJ

Yuki Okamoto, Shinnosuke Takamichi, Ai Morimatsu, Aya Watanabe, Keisuke Imoto, and Yoichi Yamashita

Sponsor Award (Kotoba Technologies, Inc. Award) from NLP2024

2021

2020

Book Chapters

2017

Keisuke Imoto, et al.

Q15 How to use sound level meters?

Acousticpedia for Beginners, Acoustical Society of Japan, Eds. Corona Publishing, pp. 60–63, March 2017. (in Japanese)

Review papers

2023

Keisuke Imoto

DCASE Challenge: Series of Competitions for Analyzing and Understanding Environmental Sounds

Journal of the Acoustical Society of Japan, Vol. 79, No. 9, pp. 470–476, 2019. (in Japanese)
Keisuke Imoto

Environmental Sound Analysis

The Journal of the Institute of Electronics, Information and Communication Engineers, Vol. 106, No. 8, pp.774-776, 2023. (in Japanese)

2022

Keisuke Imoto

Environmental Sound Analysis Utilizing Domain Knowledge

The Journal of the Institute of Electronics, Information and Communication Engineers, Vol. 105, No. 12, pp.1434-1440, 2022. (in Japanese)
Keisuke Imoto and Yohei Kawaguchi

Research Trends in Environmental Sound Analysis and Anomalous Sound Detection

IEICE Engineering Sciences Society Fundamentals Review, Vol. 15, No. 4, pp. 268-280, 2022. (in Japanese)

2018

Invited Talks

2022

Keisuke Imoto

Introduction to DCASE Challenge

Annual Meeting of Acoustical Society of Japan, pp. 1151-1152, 2023.

2021

Keisuke Imoto

Fundamentals and Recent Advances in Environmental Sound Analysis

Overview Session (OS-2 #3), Asia Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC), 2021.

Domestic Conferences

2021

Keisuke Imoto, Yuki Okamoto, Shinnosuke Takamichi, and Yoichi Yamashita

Environmental sound synthesis using RWCP-SSD and RWCP-SSD-Onomatopoeia

IDR user forum, 2021.

Others