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Creators/Authors contains: "Harwath, David"

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  1. Free, publicly-accessible full text available February 26, 2026
  2. Free, publicly-accessible full text available November 1, 2025
  3. Clinical diagnosis of stuttering requires an assessment by a licensed speech-language pathologist. However, this process is time-consuming and requires clinicians with training and experience in stuttering and fluency disorders. Unfortunately, only a small percentage of speech-language pathologists report being comfortable working with individuals who stutter, which is inadequate to accommodate for the 80 million individuals who stutter worldwide. Developing machine learning models for detecting stuttered speech would enable universal and automated screening for stuttering, enabling speech pathologists to identify and follow up with patients who are most likely to be diagnosed with a stuttering speech disorder. Previous research in this area has predominantly focused on utterance-level detection, which is not sufficient for clinical settings where word-level annotation of stuttering is the norm. In this study, we curated a stuttered speech dataset with word-level annotations and introduced a word-level stuttering speech detection model leveraging self-supervised speech models. Our evaluation demonstrates that our model surpasses previous approaches in word-level stuttering speech detection. Additionally, we conducted an extensive ablation analysis of our method, providing insight into the most important aspects of adapting self-supervised speech models for stuttered speech detection. 
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  4. Self-supervised speech (SSL) models have recently become widely adopted for many downstream speech processing tasks. Typically, SSL models are used as feature extractors, with a downstream prediction head trained for a specific task. However, since different layers of SSL models capture different types of information, the methods of combining them remain underexplored. To address this, the authors propose a general framework for SSL model utilization through the concept of an interface that connects the upstream and downstream. Within this view, the common technique of combining features via a layerwise weighted sum is treated as one specific interface. The authors propose several alternative interface designs and show that the weighted sum interface is suboptimal for many tasks. In particular, they demonstrate that a convolutional interface with depth scaling logarithmically with the upstream model’s depth consistently outperforms other designs. 
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  5. his paper introduces Semantic Parsing in Contextual Environments (SPICE), a task aimed at improving artificial agents’ contextual awareness by integrating multimodal inputs with prior contexts. Unlike traditional semantic parsing, SPICE provides a structured and interpretable framework for dynamically updating an agent’s knowledge with new information, reflecting the complexity of human communication. To support this task, the authors develop the VG-SPICE dataset, which challenges models to construct visual scene graphs from spoken conversational exchanges, emphasizing the integration of speech and visual data. They also present the Audio-Vision Dialogue Scene Parser (AViD-SP), a model specifically designed for VG-SPICE. Both the dataset and model are released publicly, with the goal of advancing multimodal information processing and integration. 
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  6. Generating realistic audio for human actions is critical for applications such as film sound effects and virtual reality games. Existing methods assume complete correspondence between video and audio during training, but in real-world settings, many sounds occur off-screen or weakly correspond to visuals, leading to uncontrolled ambient sounds or hallucinations at test time. This paper introduces AV-LDM, a novel ambient-aware audio generation model that disentangles foreground action sounds from ambient background noise in in-the-wild training videos. The approach leverages a retrieval-augmented generation framework to synthesize audio that aligns both semantically and temporally with the visual input. Trained and evaluated on Ego4D and EPIC-KITCHENS datasets, along with the newly introduced Ego4D-Sounds dataset (1.2M curated clips with action-audio correspondence), the model outperforms prior methods, enables controllable ambient sound generation, and shows promise for generalization to synthetic video game clips. This work is the first to emphasize faithful video-to-audio generation focused on observed visual content despite noisy, uncurated training data. 
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