Kazuhito Koishida

I am a Principal Lead Scientist at Applied Sciences Group in Experiences + Devices organization. I have been with Microsoft since 2000. My area of interests is in signal processing and machine learning for audio, speech, computer vision, and other sensor data.

Past projects

• Audio and voice compression: Bitrate/bandwidth scalable codec, MELP codec at 1.2kbps, and Windows Media Audio and Voice codec
• Audio matching: Voice note application and music recognition service
• Microphone array processing: Beamforming and sound source localization
• Audio/voice detection and recognition: Keyword spotting and speaker identification
• Speech enhancement: Audio/visual fusion and bandwidth expansion

Education

• B.S degree in Electrical Engineering from the Tokyo Institute of Technology, Japan, in 1994
• M.S. degree in Electrical Engineering from the Tokyo Institute of Technology, Japan, in 1995
• Ph.D. degree in Electrical Engineering from the Tokyo Institute of Technology, Japan, in 1998. Dissertation title: Speech Coding Based on Mel-Generalized Cepstral Analysis
• Post doctoral researcher at Signal Compression Lab in the University of California, Santa Barbara, 1998-2000

• Toward A Multimodal Approach for Disfluency Detection and Categorization

  Proceedings, ICASSP 2023 June, 2023 Pages 1-5

  By Amrit Romana, Kazuhito Koishida
• SCP-GAN: Self-Correcting Discriminator Optimization for Training Consistency Preserving Metric GAN on Speech Enhancement Tasks

  Proceedings, Interspeech 2023 August, 2023 Pages 2463-2467

  By Vasily Zadorozhnyy, Qiang Ye, Kazuhito Koishida
• Progressive Knowledge Distillation: Balancing Inference Latency and Accuracy at Runtime

  Workshop on Efficient Systems for Foundation Models @ ICML2023 July, 2023

  By Don Dennis, Abhishek Shetty, Anish Sevekari, Kazuhito Koishida, Virginia Smith
• Training Robust Zero-Shot Voice Conversion Models with Self-supervised Features

  Proceedings, ICASSP 2022 May, 2022 Pages 6557-6561

  By Trung Dang, Dung Tran, Peter Chin, Kazuhito Koishida
• A Training Framework for Stereo-Aware Speech Enhancement Using Deep Neural Networks

  Proceedings, ICASSP 2022 May, 2022 Pages 6962-6966

  By Bahareh Tolooshams, Kazuhito Koishida
• Cascaded Time + Time-Frequency Unet for Speech Enhancement: Jointly Addressing Clipping, Codec Distortions, and Gaps

  Proceedings, ICASSP 2021 June, 2021 Pages 7153-7157

  By Arun Nair, Kazuhito Koishida
• Single-Channel Speech Enhancement Using Learnable Loss Mixup

  Proceedings, Interspeech 2021 August, 2021 Pages 2696-2700

  By Oscar Chang, Dung Tran, Kazuhito Koishida
• INTERSPEECH 2021 Deep Noise Suppression Challenge

  Proceedings, Interspeech 2021 August, 2021 Pages 2796-2800

  By Chandan K A Reddy, Harishchandra Dubey, Kazuhito Koishida, Arun Nair, Vishak Gopal, Ross Cutler, Sebastian Braun, Hannes Gamper, Robert Aichner, Sriram Srinivasan
• Single-Channel Speech Enhancement by Subspace Affinity Minimization

  Proceedings, Interspeech 2020 October, 2020 Pages 2447-2451

  By Dung Tran, Kazuhito Koishida
• MMTM: Multimodal Transfer Module for CNN Fusion

  The IEEE Conference on Computer Vision and Pattern Recognition (CVPR) June, 2020

  By Hamid Vaezi Joze, Amirreza Shaban, Michael Iuzzolino, Kazuhito Koishida
• Neuro-Symbolic Visual Reasoning: Disentangling "Visual" from "Reasoning"

  Proceedings of the 37th International Conference on Machine Learning (ICML), Vienna, Austria July, 2020

  By Saeed Amizadeh, Hamid Palangi, Oleksandr Polozov, Yichen Huang, Kazuhito Koishida
• Low-Latency Single Channel Speech Enhancement Using U-Net Convolutional Neural Networks

  Proceedings, ICASSP 2020 May, 2020 Pages 6214-6218

  By Ahmet Bulut, Kazuhito Koishida
• Geometrically Constrained Independent Vector Analysis For Directional Speech Enhancement

  Proceedings, ICASSP 2020 May, 2020 Pages 846-850

  By Li Li, Kazuhito Koishida
• AV(SE)2 : Audio-Visual Squeeze-Excite Speech Enhancement

  Proceedings, ICASSP 2020 May, 2020 Pages 7539-7543

  By Michael Iuzzolino, Kazuhito Koishida
• Improved Active Speaker Detection Based on Optical Flow

  IEEE/CVF Conference on Computer Vision and Pattern Recognition Workshops (CVPRW) June, 2020 Pages 4084-4090

  By Chong Huang, Kazuhito Koishida
• Online Directional Speech Enhancement Using Geometrically Constrained Independent Vector Analysis

  Proceedings, Interspeech 2020 October, 2020 Pages 61-65

  By Li Li, Kazuhito Koishida, Shoji Makino
• Low-Latency Single Channel Speech Dereverberation using U-Net Convolutional Neural Networks

  Proceedings, Interspeech 2020 October, 2020 Pages 2442-2446

  By Ahmet Bulut, Kazuhito Koishida
• Robust Pitch Regression with Voiced/Unvoiced Classification in Nonstationary Noise Environments

  Proceedings, Interspeech 2020 October, 2020 Pages 175-179

  By Dung Tran, Uros Batricevic, Kazuhito Koishida
• Adversarial Training for Speech Super-Resolution

  IEEE Journal of Selected Topics in Signal Processing May, 2019 Vol. 13, No. 2 Pages 347-358

  By Sefik Emre Eskimez, Kazuhito Koishida, Zhiyao Duan
• Speech Super Resolution Generative Adversarial Network

  Proceedings, 2019 International Conference on Acoustics, Speech and Signal Processing (ICASSP) May, 2019 Pages 3717-3721

  By Sefik Emre Eskimez, Kazuhito Koishida
• Sound Event Detection in Multichannel Audio Using Convolutional Time-Frequency-Channel Squeeze and Excitation

  Proceedings, Interspeech 2019 September, 2019 Pages 3629-3633

  By Wei Xia, Kazuhito Koishida
• Text Independent Speaker Verification Based on Triplet Convolutional Neural Network Embeddings

  IEEE/ACM Transactions on Audio, Speech, and Language Processing September, 2018 Vol. 26, No. 9 Pages 1633-1644

  By Chunlei Zhang, Kazuhito Koishida, John H. L. Hansen
• End-to-End Text-Independent Speaker Verification with Flexibility in Utterance Duration

  Proceedings, 2017 IEEE Automatic Speech Recognition and Understanding Workshop (ASRU) December, 2017 Pages 584-590

  By Chunlei Zhang, Kazuhito Koishida
• End-to-End Text-Independent Speaker Verification with Triplet Loss on Short Utterances

  Proceedings, Interspeech 2017 2017 Pages 1487-1491

  By Chunlei Zhang, Kazuhito Koishida
• Hybrid Low Bitrate Audio Coding Using Adaptive Gain Shape Vector Quantization

  Proceedings, 2008 IEEE 10th Workshop on Multimedia Signal Processing October, 2008 Pages 927-932

  By Sanjeev Mehrotra, Wei-ge Chen, Kazuhito Koishida, Naveen Thumpudi
• A 1200/2400 BPS Coding Suite Based on MELP

  Proceedings, 2002 IEEE Workshop on Speech Coding October, 2002 Pages 90-92

  By Tian Wang, Kazuhito Koishida, Vladimir Cuperman, Allen Gersho, J.S. Collura
• Vector Quantization of Speech Spectral Parameters Using Statistics of Static and Dynamic Features

  IEICE Transactions on Information and Systems October, 2001 Vol. E84-D, No. 10 Pages 1427-1434

  By Kazuhito Koishida, Keiichi Tokuda, Takashi Masuko, Takao Kobayashi
• A 16 kb/s Wideband CELP-based Speech Coder Using Mel-Generalized Cepstral Analysis

  IEICE Transactions on Information and Systems April, 2000 Vol. E83-D, No. 4 Pages 876-883

  By Kazuhito Koishida, Gou Hirabayashi, Keiichi Tokuda, Takao Kobayashi
• A 16-kbit/s Bandwidth Scalable Audio Coder Based on the G.729 Standard

  Proceedings, 2000 International Conference on Acoustics, Speech and Signal Processing (ICASSP) June, 2000 Pages 1149-1152

  By Kazuhito Koishida, Vladimir Cuperman, Allen Gersho
• A 1200 BPS Speech Coder Based on MELP

  Proceedings, 2000 International Conference on Acoustics, Speech and Signal Processing (ICASSP) June, 2000 Pages 1375-1378

  By Kazuhito Koishida, Tian Wang, Vladimir Cuperman, Allen Gersho, J.S. Collura
• Enhancing MPEG-4 CELP by Jointly Optimized Inter/Intra-frame LSP Predictors

  Proceedings, 2000 IEEE Workshop on Speech Coding September, 2000 Pages 90-92

  By Kazuhito Koishida, Tian Wang, Vladimir Cuperman, Allen Gersho, Jan Lindén
• CELP Speech Coding Based on Mel-Generalized Cepstral Analysis

  IEICE Transactions on Information and Systems February, 1998 Vol. J81-A, No. 2 Pages 252-260

  By Kazuhito Koishida, Keiichi Tokuda, Satoshi Imai, Takao Kobayashi
• A 16 kbit/s Wideband CELP Coder Using Mel-Generalized Cepstral Analysis and Its Subjective Evaluation

  Proceedings, 5th International Conference on Spoken Language Processing (ICSLP '98) 1998 Vol. 6 Pages 2583-2586

  By Kazuhito Koishida, Gou Hirabayashi, Keiichi Tokuda, Takao Kobayashi
• A Wideband CELP Speech Coder at 16 kbit/s Based on Mel-Generalized Cepstral Analysis

  Proceedings, 1998 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) May, 1998 Vol. 1 Pages 161-164

  By Kazuhito Koishida, Gou Hirabayashi, Keiichi Tokuda, Takao Kobayashi
• Low Bit Rate Speech Coding Based on Mel-Generalized Cepstral Analysis

  Tokyo Institute of Technology 1998

  By Kazuhito Koishida
• Spectral Representation of Speech Based on Mel-Generalized Cepstral Coefficients and Its Properties

  IEICE Transactions on Information and Systems November, 1997 Vol. J80-A, No. 11 Pages 1999-2006

  By Kazuhito Koishida, Keiichi Tokuda, Satoshi Imai, Takao Kobayashi
• Spectral Quantization Using Statistics of Static and Dynamic Features

  Proceedings, 1997 IEEE Workshop on Speech Coding for Telecommunications September, 1997 Pages 19-20

  By Kazuhito Koishida, Takashi Masuko, Keiichi Tokuda, Takao Kobayashi
• Efficient Encoding of Mel-Generalized Cepstrum for CELP Coders

  Proceedings, 1997 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) April, 1997 Vol. 2 Pages 1355-1358

  By Kazuhito Koishida, S. Imai, Keiichi Tokuda, Takao Kobayashi
• CELP Coding System Based on Mel-Generalized Cepstral Analysis

  Proceedings, 4th International Conference on Spoken Language Processing (ICSLP '96) October, 1996 Vol. 1 Pages 314-317

  By Kazuhito Koishida, S. Imai, Keiichi Tokuda, Takao Kobayashi
• CELP Coding System Based on Mel-Cepstral Analysis

  Proceedings, 1995 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP) October, 1995 Vol. 1 Pages 33-36

  By Kazuhito Koishida, S. Imai, Keiichi Tokuda, Takao Kobayashi