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Alkis Koudounas

6 accepted papers

2025

Detecting and Mitigating Challenges in Zero-Shot Video Summarization with Video LLMs

ACL 2025finding

Video summarization aims to generate a condensed textual version of an original video. Summaries may consist of either plain text or a shortlist of salient events, possibly including temporal or spatial references. Video Large Language Models (VLLMs) exhibit impressive zero-shot capabilities in vide…

2025

voc2vec: A Foundation Model for Non-Verbal Vocalization

ICASSP 2025accepted

Speech foundation models have demonstrated exceptional capabilities in speech-related tasks. Nevertheless, these models often struggle with non-verbal audio data, such as vocalizations, baby crying, etc., which are critical for various real-world applications. Audio foundation models well handle non…

Cited by 0SourceScholar
2024

Ainur: Harmonizing Speed and Quality in Deep Music Generation Through Lyrics-Audio Embeddings

ICASSP 2024accepted

In the domain of music generation, prevailing methods focus on text-to-music tasks, predominantly relying on diffusion models. However, they fail to achieve good vocal quality in synthetic music compositions.To tackle this critical challenge, we present Ainur, a hierarchical diffusion model that con…

Cited by 0SourceScholar
2024

Prioritizing Data Acquisition for end-to-end Speech Model Improvement

ICASSP 2024accepted

As speech processing moves toward more data-hungry models, data selection and acquisition become crucial to building better systems. Recent efforts have championed quantity over quality, following the mantra "The more data, the better." However, not every data brings the same benefit. This paper pro…

Cited by 0SourceScholar
2024

Speech Analysis of Language Varieties in Italy

COLING 2024main

Italy exhibits rich linguistic diversity across its territory due to the distinct regional languages spoken in different areas. Recent advances in self-supervised learning provide new opportunities to analyze Italy’s linguistic varieties using speech data alone. This includes the potential to levera…

2023

Exploring Subgroup Performance in End-to-End Speech Models

ICASSP 2023accepted

End-to-End Spoken Language Understanding models are generally evaluated according to their overall accuracy, or separately on (a priori defined) data subgroups of interest. We propose a technique for analyzing model performance at the subgroup level, which considers all subgroups that can be defined…

Cited by 0SourceScholar