jeongsoo_choi

Jeongsoo Choi

Postdoctoral Researcher at KAIST

I am a postdoctoral researcher in Multimodal AI Lab at KAIST EE, advised by Prof. Joon Son Chung. My research interests include multimodal conversational AI, with a focus on spoken language modeling, audio-visual speech understanding and generation, multilingual communication, and human-AI interaction.

About Me

Work Experience

  • KAIST, Daejeon, South Korea (Mar. 2026 - Present)
    Postdoctoral Researcher
    Alternative Military Service as Technical Research Personnel
  • Meta, Seattle, WA, United States (Jun. 2025 - Sep. 2025)
    Research Scientist Intern, FAIR Team
    Advisor: Dr. Hongyu Gong
  • Microsoft, Beijing, China (May 2024 - Oct. 2024)
    Research Intern, Speech Team
    Advisors: Dr. Shujie Liu and Dr. Jinyu Li

Education

  • KAIST, Daejeon, South Korea (Sep. 2020 - Feb. 2026)
    Ph.D. in Electrical Engineering
    Advisor: Prof. Joon Son Chung
  • KAIST, Daejeon, South Korea (Mar. 2015 - Aug. 2020)
    B.S. in Electrical Engineering

Publications

2025

  • Deep Understanding of Sign Language for Sign to Subtitle Alignment
    Youngjoon Jang*, Jeongsoo Choi*, Junseok Ahn, Joon Son Chung
    IEEE Transactions on Multimedia (TMM)
    [ paper ]
  • Dub-S2ST: Textless Speech-to-Speech Translation for Seamless Dubbing
    Jeongsoo Choi*, Jaehun Kim*, Joon Son Chung
    EMNLP 2025 Findings
    [ paper ]
  • AlignDiT: Multimodal Aligned Diffusion Transformer for Synchronized Speech Generation
    Jeongsoo Choi, Ji-Hoon Kim, Kim Sung-Bin, Tae-Hyun Oh, Joon Son Chung
    ACM MM 2025
    [ paper | code | demo ]
  • VoiceCraft-Dub: Automated Video Dubbing with Neural Codec Language Models
    Kim Sung-Bin, Jeongsoo Choi, Puyuan Peng, Joon Son Chung, Tae-Hyun Oh, David Harwath
    ICCV 2025
    [ paper | demo ]
  • MAVFlow: Preserving Paralinguistic Elements with Conditional Flow Matching for Zero-Shot AV2AV Multilingual Translation
    Sungwoo Cho, Jeongsoo Choi, Sungnyun Kim, Se-Young Yun
    ICCV 2025
    [ paper ]
  • Accelerating Diffusion-based Text-to-Speech Model Training with Dual Modality Alignment
    Jeongsoo Choi*, Zhikang Niu*, Ji-Hoon Kim, Chunhui Wang, Joon Son Chung, Xie Chen
    Interspeech 2025
    [ paper | code | demo ]
  • From Faces to Voices: Learning Hierarchical Representations for High-quality Video-to-Speech
    Ji-Hoon Kim, Jeongsoo Choi, Jaehun Kim, Chaeyoung Jung, Joon Son Chung
    CVPR 2025 Highlight presentation
    [ paper | demo ]
  • ARLON: Boosting Diffusion Transformers with Autoregressive Models for Long Video Generation
    Zongyi Li*, Shujie Hu*, Shujie Liu, Long Zhou, Jeongsoo Choi, Lingwei Meng, Xun Guo, Jinyu Li, Hefei Ling, Furu Wei
    ICLR 2025
    [ paper | demo ]
  • V2SFlow: Video-to-Speech Generation with Speech Decomposition and Rectified Flow
    Jeongsoo Choi*, Ji-Hoon Kim*, Jinyu Li, Joon Son Chung, Shujie Liu
    ICASSP 2025
    [ paper | demo ]
  • Accelerating Codec-based Speech Synthesis with Multi-Token Prediction and Speculative Decoding
    Tan Dat Nguyen, Ji-Hoon Kim, Jeongsoo Choi, Shukjae Choi, Jinseok Park, Younglo Lee, Joon Son Chung
    ICASSP 2025
    [ paper | demo ]

2024

  • Textless Unit-to-Unit training for Many-to-Many Multilingual Speech-to-Speech Translation
    Minsu Kim*, Jeongsoo Choi*, Dahun Kim, and Yong Man Ro
    IEEE/ACM Transactions on Audio, Speech, and Language Processing (TASLP)
    [ paper | code | demo ]
  • AV2AV: Direct Audio-Visual Speech to Audio-Visual Speech Translation with Unified Audio-Visual Speech Representation
    Jeongsoo Choi*, Se Jin Park*, Minsu Kim*, and Yong Man Ro
    CVPR 2024 Highlight presentation
    [ paper | code | demo ]
  • Text-driven Talking Face Synthesis by Reprogramming Audio-driven Models
    Jeongsoo Choi, Minsu Kim, Se Jin Park, and Yong Man Ro
    ICASSP 2024
    [ paper | demo ]
  • Towards Practical and Efficient Image-to-Speech Captioning with Vision-Language Pre-training and Multi-modal Tokens
    Minsu Kim, Jeongsoo Choi, Soumi Maiti, Jeong Hun Yeo, Shinji Watanabe, Yong Man Ro
    ICASSP 2024
    [ paper | code | demo ]
  • Exploring Phonetic Context-Aware Lip-Sync For Talking Face Generation
    Se Jin Park, Minsu Kim, Jeongsoo Choi, and Yong Man Ro
    ICASSP 2024
    [ paper ]
  • AKVSR: Audio Knowledge Empowered Visual Speech Recognition by Compressing Audio Knowledge of a Pretrained Model
    Jeong Hun Yeo, Minsu Kim, Jeongsoo Choi, Dae Hoe Kim, and Yong Man Ro
    IEEE Transactions on Multimedia (TMM)
    [ paper ]

2023

  • DiffV2S: Diffusion-based Video-to-Speech Synthesis with Vision-guided Speaker Embedding
    Jeongsoo Choi*, Joanna Hong*, and Yong Man Ro
    ICCV 2023
    [ paper | demo ]
  • Lip Reading for Low-resource Languages by Learning and Combining General Speech Knowledge and Language-specific Knowledge
    Minsu Kim*, Jeong Hun Yeo*, Jeongsoo Choi, and Yong Man Ro
    ICCV 2023
    [ paper ]
  • Intelligible Lip-to-Speech Synthesis with Speech Units
    Jeongsoo Choi, Minsu Kim, and Yong Man Ro
    Interspeech 2023
    [ paper | code | demo ]
  • Watch or Listen: Robust Audio-Visual Speech Recognition With Visual Corruption Modeling and Reliability Scoring
    Joanna Hong*, Minsu Kim*, Jeongsoo Choi, and Yong Man Ro
    CVPR 2023
    [ paper | code | demo | data ]

2022

  • SyncTalkFace: Talking Face Generation with Precise Lip-Syncing via Audio-Lip Memory
    Se Jin Park, Minsu Kim, Joanna Hong, Jeongsoo Choi, and Yong Man Ro
    AAAI 2022 Oral presentation
    [ paper ]

Awards & Honors

Academic Services

Conference Reviewer

  • AAAI
  • CVPR
  • ECCV
  • ICASSP
  • ICCV
  • Interspeech

Journal Reviewer

  • International Journal of Computer Vision (IJCV)

Jeongsoo Choi @ KAIST