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Xubo Liu

25 accepted papers

2026

OMNI-AVSR: TOWARDS UNIFIED MULTIMODAL SPEECH RECOGNITION WITH LARGE LANGUAGE MODELS

ICASSP 2026poster

Large language models (LLMs) have recently achieved impressive results in speech recognition across multiple modalities, including Auditory Speech Recognition (ASR), Visual Speech Recognition (VSR), and Audio-Visual Speech Recognition (AVSR). Despite this progress, current LLM-based approaches typic…

Cited by 0SourcePDFScholar
2026

Scaling Speech Tokenizers with Diffusion Autoencoders

ICLR 2026poster

Speech tokenizers are foundational to speech language models, yet existing approaches face two major challenges: (1) balancing trade-offs between encoding semantics for understanding and acoustics for reconstruction, and (2) achieving low bit rates and low token rates. We propose Speech Diffusion To…

Cited by 0SourceScholar
2025

ALMTokenizer: A Low-bitrate and Semantic-rich Audio Codec Tokenizer for Audio Language Modeling

ICML 2025poster

Recent advancements in audio language models have underscored the pivotal role of audio tokenization, which converts audio signals into discrete tokens, thereby facilitating the application of language model architectures to the audio domain. In this study, we introduce ALMTokenizer, a novel low-bit…

Cited by 0SourcePDFScholar
2025

Disentangling Hierarchical Features for Anomalous Sound Detection Under Domain Shift

ICASSP 2025accepted

Anomalous sound detection (ASD) encounters difficulties with domain shift, where the sounds of machines in target domains differ significantly from those in source domains due to varying operating conditions. Existing methods typically employ domain classifiers to enhance detection performance, but…

Cited by 0SourceScholar
2025

FlowSep: Language-Queried Sound Separation with Rectified Flow Matching

ICASSP 2025accepted

Language-queried audio source separation (LASS) focuses on separating sounds using textual descriptions of the desired sources. Current methods mainly use discriminative approaches, such as time-frequency masking, to separate target sounds and minimize interference from other sources. However, these…

Cited by 0SourceScholar
2025

MoME: Mixture of Matryoshka Experts for Audio-Visual Speech Recognition

NeurIPS 2025poster

Large language models (LLMs) have recently shown strong potential in audio-visual speech recognition (AVSR), but their high computational demands and sensitivity to token granularity limit their practicality in resource-constrained settings. Token compression methods can reduce inference cost, but t…

Cited by 0SourceScholar
2025

NCL-CIR: Noise-aware Contrastive Learning for Composed Image Retrieval

ICASSP 2025accepted

Composed Image Retrieval (CIR) seeks to find a target image using a multi-modal query, which combines an image with modification text to pinpoint the target. While recent CIR methods have shown promise, they mainly focus on exploring relationships between the query pairs (image and text) through dat…

Cited by 0SourceScholar
2025

RiTTA: Modeling Event Relations in Text-to-Audio Generation

EMNLP 2025

Existing text-to-audio (TTA) generation methods have neither systematically explored audio event relation modeling, nor proposed any new framework to enhance this capability. In this work, we systematically study audio event relation modeling in TTA generation models. We first establish a benchmark

2025

Scaling Transformers for Low-Bitrate High-Quality Speech Coding

ICLR 2025poster

The tokenization of audio with neural audio codec models is a vital part of modern AI pipelines for the generation or understanding of speech, alone or in a multimodal context. Traditionally such tokenization models have concentrated on low parameter-count architectures using only components with st…

2025

Sound-VECaps: Improving Audio Generation with Visually Enhanced Captions

ICASSP 2025accepted

Generative models have shown significant achievements in audio generation tasks. However, existing models struggle with complex and detailed prompts, leading to potential performance degradation. We hypothesize that this problem stems from the simplicity and scarcity of the training data. This work…

Cited by 0SourceScholar
2024

Audio Prompt Tuning for Universal Sound Separation

ICASSP 2024accepted

Universal sound separation (USS) is a task to separate arbitrary sounds from an audio mixture. Existing USS systems are capable of separating arbitrary sources, given a few examples of the target sources as queries. However, separating arbitrary sounds with a single system is challenging, and the ro…

Cited by 0SourceScholar
2024

CM-PIE: Cross-Modal Perception for Interactive-Enhanced Audio-Visual Video Parsing

ICASSP 2024accepted

Audio-visual video parsing is the task of categorizing a video with weak labels at the segment level, and predicting them as audible or visible events. Recent methods have leveraged the attention mechanism to capture the semantic correlations among the whole video across the audio-visual modalities.…

Cited by 0SourceScholar
2024

First-Shot Unsupervised Anomalous Sound Detection with Unknown Anomalies Estimated by Metadata-Assisted Audio Generation

ICASSP 2024accepted

First-shot (FS) unsupervised anomalous sound detection (ASD) is a brand-new task introduced in DCASE 2023 Challenge Task 2, where the anomalous sounds for the target machine types are unseen in training. Existing methods often rely on the availability of normal and abnormal sound data from the targe…

Cited by 0SourceScholar
2024

Learning Temporal Resolution in Spectrogram for Audio Classification

AAAI 2024technical

The audio spectrogram is a time-frequency representation that has been widely used for audio classification. One of the key attributes of the audio spectrogram is the temporal resolution, which depends on the hop size used in the Short-Time Fourier Transform (STFT). Previous works generally assume t…

2024

Look before You Leap: Dual Logical Verification for Knowledge-based Visual Question Generation

COLING 2024main

Knowledge-based Visual Question Generation aims to generate visual questions with outside knowledge other than the image. Existing approaches are answer-aware, which incorporate answers into the question-generation process. However, these methods just focus on leveraging the semantics of inputs to p…

2024

Retrieval-Augmented Text-to-Audio Generation

ICASSP 2024accepted

Despite recent progress in text-to-audio (TTA) generation, we show that the state-of-the-art models, such as AudioLDM, trained on datasets with an imbalanced class distribution, such as AudioCaps, are biased in their generation performance. Specifically, they excel in generating common audio classes…

Cited by 0SourceScholar
2024

Selective Prompting Tuning for Personalized Conversations with LLMs

ACL 2024findings

In conversational AI, personalizing dialogues with persona profiles and contextual understanding is essential. Despite large language models’ (LLMs) improved response coherence, effective persona integration remains a challenge. In this work, we first study two common approaches for personalizing LL…

2023

AudioLDM: Text-to-Audio Generation with Latent Diffusion Models

ICML 2023poster

Text-to-audio (TTA) systems have recently gained attention for their ability to synthesize general audio based on text descriptions. However, previous studies in TTA have limited generation quality with high computational costs. In this study, we propose AudioLDM, a TTA system that is built on a lat…

2023

Learning Retrieval Augmentation for Personalized Dialogue Generation

EMNLP 2023long main

Personalized dialogue generation, focusing on generating highly tailored responses by leveraging persona profiles and dialogue context, has gained significant attention in conversational AI applications. However, persona profiles, a prevalent setting in current personalized dialogue datasets, typica…

Cited by 0SourcecodeScholar
2023

Personalized Dialogue Generation with Persona-Adaptive Attention

AAAI 2023technical

Persona-based dialogue systems aim to generate consistent responses based on historical context and predefined persona. Unlike conventional dialogue generation, the persona-based dialogue needs to consider both dialogue context and persona, posing a challenge for coherent training. Specifically, thi…

2023

Simple Pooling Front-Ends for Efficient Audio Classification

ICASSP 2023accepted

Recently, there has been increasing interest in building efficient audio neural networks for on-device scenarios. Most existing approaches are designed to reduce the size of audio neural networks using methods such as model pruning. In this work, we show that instead of reducing model size using com…

Cited by 0SourceScholar
2023

SynthVSR: Scaling Up Visual Speech Recognition With Synthetic Supervision

CVPR 2023poster

Recently reported state-of-the-art results in visual speech recognition (VSR) often rely on increasingly large amounts of video data, while the publicly available transcribed video datasets are limited in size. In this paper, for the first time, we study the potential of leveraging synthetic visual…

Cited by 27SourcePDFScholar
2022

Audio-Visual Tracking of Multiple Speakers Via a PMBM Filter

ICASSP 2022accepted

Audio-visual tracking of multiple speakers requires to estimate the state (e.g. velocity and location) of each speaker by leveraging the information of both audio and visual modalities. Estimating the number of speakers and their states jointly remains a challenging problem. We propose an Audio-Visu…

Cited by 0SourceScholar