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Kazuhito Koishida

19 accepted papers

2025

Automatic Joint Structured Pruning and Quantization for Efficient Neural Network Training and Compression

CVPR 2025poster

Structured pruning and quantization are fundamental techniques used to reduce the size of deep neural networks (DNNs) and typically are applied independently. Applying these techniques jointly via co-optimization has the potential to produce smaller, high-quality models. However, existing joint sche…

2025

CorrGAN: Simultaneous Learning of Speech Enhancement and Perceptual Quality Loss Functions

ICASSP 2025accepted

Deep-learning models have allowed effective end-to-end SE systems in the Speech Enhancement (SE) field. Most of these methods are trained using a fixed reconstruction loss in a supervised setting. Often these losses do not perfectly represent the desired perceptual quality metrics, resulting in sub-…

Cited by 0SourceScholar
2025

Hierarchical Self-Attention: Generalizing Neural Attention Mechanics to Multi-Scale Problems

NeurIPS 2025poster

Transformers and their attention mechanism have been revolutionary in the field of Machine Learning. While originally proposed for the language data, they quickly found their way to the image, video, graph, etc. data modalities with various signal geometries. Despite this versatility, generalizing t…

Cited by 0SourceScholar
2025

VideoWebArena: Evaluating Long Context Multimodal Agents with Video Understanding Web Tasks

ICLR 2025poster

Videos are often used to learn or extract the necessary information to complete tasks in ways different than what text or static imagery can provide. However, many existing agent benchmarks neglect long-context video understanding, instead focus- ing on text or static image inputs. To bridge this ga…

Cited by 3SourcePDFScholar
2025

WinSpot: GUI Grounding Benchmark with Multimodal Large Language Models

ACL 2025short

Graphical User Interface (GUI) automation relies on accurate GUI grounding. However, obtaining large-scale, high-quality labeled data remains a key challenge, particularly in desktop environments like Windows Operating System (OS). Existing datasets primarily focus on structured web-based elements,…

2025

Windows Agent Arena: Evaluating Multi-Modal OS Agents at Scale

ICML 2025poster

Large language models (LLMs) show potential as computer agents, enhancing productivity and software accessibility in multi-modal tasks. However, measuring agent performance in sufficiently realistic and complex environments becomes increasingly challenging as: (i) most benchmarks are limited to sp…

2024

Weakly-supervised Audio Separation via Bi-modal Semantic Similarity

ICLR 2024poster

Conditional sound separation in multi-source audio mixtures without having access to single source sound data during training is a long standing challenge. Existing mix-and-separate based methods suffer from significant performance drop with multi-source training mixtures due to the lack of supervis…

2024

uaMix-MAE: Efficient Tuning of Pretrained Audio Transformers with Unsupervised Audio Mixtures

ICASSP 2024accepted

Masked Autoencoders (MAEs) learn rich low-level representations from unlabeled data but require substantial labeled data to effectively adapt to downstream tasks. Conversely, Instance Discrimination (ID) emphasizes high-level semantics, offering a potential solution to alleviate annotation requireme…

Cited by 0SourceScholar
2023

Progressive Ensemble Distillation: Building Ensembles for Efficient Inference

NeurIPS 2023poster

Knowledge distillation is commonly used to compress an ensemble of models into a single model. In this work we study the problem of progressive ensemble distillation: Given a large, pretrained teacher model , we seek to decompose the model into an ensemble of smaller, low-inference cost student mode…

Cited by 5SourcePDFScholar
2022

A Training Framework for Stereo-Aware Speech Enhancement Using Deep Neural Networks

ICASSP 2022accepted

Deep learning-based speech enhancement has shown unprecedented performance in recent years. The most popular mono speech enhancement frameworks are end-to-end networks mapping the noisy mixture into an estimate of the clean speech. With growing computational power and availability of multichannel mi…

Cited by 0SourceScholar
2022

Training Robust Zero-Shot Voice Conversion Models with Self-Supervised Features

ICASSP 2022accepted

Unsupervised Zero-Shot Voice Conversion (VC) aims to modify the speaker characteristic of an utterance to match an unseen target speaker without relying on parallel training data. Recently, self-supervised learning of speech representation has been shown to produce useful linguistic units without us…

Cited by 0SourceScholar
2021

Cascaded Time + Time-Frequency Unet For Speech Enhancement: Jointly Addressing Clipping, Codec Distortions, And Gaps

ICASSP 2021accepted

Speech enhancement aims to improve speech quality by eliminating noise and distortions. While most speech enhancement methods address signal independent additive sources of noise, several degradations to speech signals are signal dependent and non-additive, like speech clipping, codec distortions, a…

Cited by 0SourceScholar
2020

Low-Latency Single Channel Speech Enhancement Using U-Net Convolutional Neural Networks

ICASSP 2020accepted

Single-channel speech enhancement (SE) can be described, in its simplest terms, as learning a transformation from single-channel noisy speech to the clean speech. To do this, we propose a simple but effective U-Net convolutional neural network (CNN) based architecture with skip-connections with a fo…

Cited by 0SourceScholar
2020

MMTM: Multimodal Transfer Module for CNN Fusion

CVPR 2020poster

In late fusion, each modality is processed in a separate unimodal Convolutional Neural Network (CNN) stream and the scores of each modality are fused at the end. Due to its simplicity, late fusion is still the predominant approach in many state-of-the-art multimodal applications. In this paper, we p…

Cited by 397PDFScholar
2020

Neuro-Symbolic Visual Reasoning: Disentangling "Visual" from "Reasoning"

ICML 2020poster

Visual reasoning tasks such as visual question answering (VQA) require an interplay of visual perception with reasoning about the question semantics grounded in perception. However, recent advances in this area are still primarily driven by perception improvements (e.g. scene graph generation) rathe…