22 citations · 22 across the 2 of their papers we have counts for
4 papers
Language Orthogonalization for Zero-Shot Cross-Lingual Audio Deepfake Detection
Minu Kim, Ji Sub Um, Hoirin Kim
Audio deepfake detectors need to transfer to languages absent from training, as multilingual speech synthesis outpaces labeled anti-spoofing resources. While detectors increasingly…
VeRe-Flow: Guiding Flow Matching toward Clean Speech via Velocity Contrastive Regularization and Representation Alignment for Noise-Robust Bandwidth Expansion
Sujin Koo, Sangyoon Kim, Ji Sub Um +1
Noise-robust bandwidth expansion aims to reconstruct high-fidelity wideband speech from noisy low-resolution inputs. While flow matching has shown strong performance in speech gene…
How Far Do SSL Speech Models Listen for Tone? Temporal Focus of Tone Representation under Low-resource Transfer
Minu Kim, Ji Sub Um, Hoirin Kim
Lexical tone is central to many languages but remains underexplored in self-supervised learning (SSL) speech models, especially beyond Mandarin. We study four languages with comple…
Anti-Spoofing Using Transfer Learning with Variational Information Bottleneck
Youngsik Eom, Yeonghyeon Lee, Ji Sub Um +1
Recent advances in sophisticated synthetic speech generated from text-to-speech (TTS) or voice conversion (VC) systems cause threats to the existing automatic speaker verification…