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Ke Hu

20 accepted papers

2026

Diffusion-based learning framework for Constrained Nonconvex Optimization with Weighted Bootstrapped Refinement

ICML 2026poster

Recent advances in diffusion models show promising potential to accelerate nonconvex problem solving by leveraging their multimodality. However, most existing diffusion-based optimization approaches rely on supervised learning and lack a mechanism to enforce constraint satisfaction, which is require…

Cited by 0SourceScholar
2026

FedTopo: Topology-Informed Representation Alignment in Federated Learning Under Non-I.I.D. Conditions

AAAI 2026technical

Current federated-learning models deteriorate under heterogeneous (non-I.I.D.) client data, as their feature representations diverge and pixel- or patch-level objectives fail to capture the global topology which is essential for high-dimensional visual tasks. We propose FedTopo, a framework that int

Cited by 0SourcePDFScholar
2026

Sample-Efficient Diffusion-based Reinforcement Learning with Critic Guidance

ICML 2026poster

Recent advances in reinforcement learning (RL) have achieved great successes by leveraging the multimodality and exploration capability of diffusion policies. Among these approaches, one representative branch focuses on the weighted-based policy optimization. This design enables better exploration c…

Cited by 0SourceScholar
2025

Chain-of-Thought Prompting for Speech Translation

ICASSP 2025accepted

Large language models (LLMs) have demonstrated remarkable advancements in language understanding and generation. Building on the success of text-based LLMs, recent research has adapted these models to use speech embeddings for prompting, resulting in Speech-LLM models that exhibit strong performance…

Cited by 0SourceScholar
2025

EMMeTT: Efficient Multimodal Machine Translation Training

ICASSP 2025accepted

A rising interest in the modality extension of foundation language models warrants discussion on the most effective, and efficient, multimodal training approach. This work focuses on neural machine translation (NMT) and proposes a joint multimodal training regime of Speech-LLM to include automatic s…

Cited by 0SourceScholar
2025

GenPO: Generative Diffusion Models Meet On-Policy Reinforcement Learning

NeurIPS 2025poster

Recent advances in reinforcement learning (RL) have demonstrated the powerful exploration capabilities and multimodality of generative diffusion-based policies. While substantial progress has been made in offline RL and off-policy RL settings, integrating diffusion policies into on-policy frameworks…

Cited by 0SourceScholar
2025

KD-MSLRT: Lightweight Sign Language Recognition Model Based on Mediapipe and 3D to 1D Knowledge Distillation

AAAI 2025technical

Artificial intelligence has achieved notable results in sign language recognition and translation. However, relatively few efforts have been made to significantly improve the quality of life for the 72 million hearing-impaired people worldwide. Sign language translation models, relying on video inpu…

Cited by 0SourcePDFScholar
2025

SpeechIQ: Speech-Agentic Intelligence Quotient Across Cognitive Levels in Voice Understanding by Large Language Models

ACL 2025long

We introduce Speech-based Intelligence Quotient (SIQ) as a new form of human cognition-inspired evaluation pipeline for voice understanding large language models (LLM_Voice), designed to assess their voice understanding ability. Moving beyond popular voice understanding metrics such as word error ra…

2025

VoiceTextBlender: Augmenting Large Language Models with Speech Capabilities via Single-Stage Joint Speech-Text Supervised Fine-Tuning

NAACL 2025long

Recent studies have augmented large language models (LLMs) with speech capabilities, leading to the development of speech language models (SpeechLMs). Earlier SpeechLMs focused on single-turn speech-based question answering (QA), where user input comprised a speech context and a text question. More…

2024

DALDet: Depth-Aware Learning Based Object Detection for Autonomous Driving

AAAI 2024technical

3D object detection achieves good detection performance in autonomous driving. However, it requires substantial computational resources, which prevents its practical application. 2D object detection has less computational burden but lacks spatial and geometric information embedded in depth. Therefor…

2024

Diffusion-based Reinforcement Learning via Q-weighted Variational Policy Optimization

NeurIPS 2024poster

Diffusion models have garnered widespread attention in Reinforcement Learning (RL) for their powerful expressiveness and multimodality. It has been verified that utilizing diffusion policies can significantly improve the performance of RL algorithms in continuous control tasks by overcoming the limi…

2024

Enhancing Visual Continual Learning with Language-Guided Supervision

CVPR 2024poster

Continual learning (CL) aims to empower models to learn new tasks without forgetting previously acquired knowledge. Most prior works concentrate on the techniques of architectures replay data regularization etc. However the category name of each class is largely neglected. Existing methods commonly…

Cited by 14SourcePDFScholar
2024

Feature Norm Regularized Federated Learning: Utilizing Data Disparities for Model Performance Gains

IJCAI 2024poster

Federated learning (FL) is a machine learning paradigm that aggregates knowledge and utilizes computational power from multiple participants to train a global model. However, a commonplace challenge—non-independent and identically distributed (non-i.i.d.) data across participants—can lead to signifi…

2024

Multilingual and Fully Non-Autoregressive ASR with Large Language Model Fusion: A Comprehensive Study

ICASSP 2024accepted

In the era of large models, the autoregressive nature of decoding often results in latency serving as a significant bottleneck. We propose a non-autoregressive LM-fused ASR system that effectively leverages the parallelization capabilities of accelerator hardware. Our approach combines the Universal…

Cited by 0SourceScholar
2023

Massively Multilingual Shallow Fusion with Large Language Models

ICASSP 2023accepted

While large language models (LLM) have made impressive progress in natural language processing, it remains unclear how to utilize them in improving automatic speech recognition (ASR). In this work, we propose to train a single multilingual language model (LM) for shallow fusion in multiple languages…

Cited by 0SourceScholar
2022

Transducer-Based Streaming Deliberation for Cascaded Encoders

ICASSP 2022accepted

Previous research on applying deliberation networks to automatic speech recognition has achieved excellent results. The attention decoder based deliberation model often works as a rescorer to improve first-pass recognition results, and requires the full first-pass hypothesis for second-pass delibera…

Cited by 0SourceScholar
2021

Learning Word-Level Confidence for Subword End-To-End ASR

ICASSP 2021accepted

We study the problem of word-level confidence estimation in subword-based end-to-end (E2E) models for automatic speech recognition (ASR). Although prior works have proposed training auxiliary confidence models for ASR systems, they do not extend naturally to systems that operate on word-pieces (WP)…

Cited by 0SourceScholar
2020

A Streaming On-Device End-To-End Model Surpassing Server-Side Conventional Model Quality and Latency

ICASSP 2020accepted

Thus far, end-to-end (E2E) models have not been shown to outperform state-of-the-art conventional models with respect to both quality, i.e., word error rate (WER), and latency, i.e., the time the hypothesis is finalized after the user stops speaking. In this paper, we develop a first-pass Recurrent…

Cited by 0SourceScholar
2020

Deliberation Model Based Two-Pass End-To-End Speech Recognition

ICASSP 2020accepted

End-to-end (E2E) models have made rapid progress in automatic speech recognition (ASR) and perform competitively relative to conventional models. To further improve the quality, a two-pass model has been proposed to rescore streamed hypotheses using the non-streaming Listen, Attend and Spell (LAS) m…

Cited by 0SourceScholar