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Christos Tsirigotis

5 accepted papers

2025

FLAM: Frame-Wise Language-Audio Modeling

ICML 2025poster

Recent multi-modal audio-language models (ALMs) excel at text-audio retrieval but struggle with frame-wise audio understanding. Prior works use temporal-aware labels or unsupervised training to improve frame-wise capabilities, but they still lack fine-grained labeling capability to pinpoint when an…

Cited by 0SourcePDFScholar
2023

A General Framework For Proving The Equivariant Strong Lottery Ticket Hypothesis

ICLR 2023poster

The Strong Lottery Ticket Hypothesis (SLTH) stipulates the existence of a subnetwork within a sufficiently overparameterized (dense) neural network that---when initialized randomly and without any training---achieves the accuracy of a fully trained target network. Recent works by Da Cunha et. al 202…

Cited by 18SourcePDFScholar
2023

Group Robust Classification Without Any Group Information

NeurIPS 2023poster

Empirical risk minimization (ERM) is sensitive to spurious correlations present in training data, which poses a significant risk when deploying systems trained under this paradigm in high-stake applications. While the existing literature focuses on maximizing group-balanced or worst-group accuracy,…

2023

Simplicial Embeddings in Self-Supervised Learning and Downstream Classification

ICLR 2023top-25%

Simplicial Embeddings (SEM) are representations learned through self-supervised learning (SSL), wherein a representation is projected into $L$ simplices of $V$ dimensions each using a \texttt{softmax} operation. This procedure conditions the representation onto a constrained space during pretraining…

2021

Convex Potential Flows: Universal Probability Distributions with Optimal Transport and Convex Optimization

ICLR 2021poster

Flow-based models are powerful tools for designing probabilistic models with tractable density. This paper introduces Convex Potential Flows (CP-Flow), a natural and efficient parameterization of invertible models inspired by the optimal transport (OT) theory. CP-Flows are the gradient map of a stro…