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Ismail Rasim Ulgen

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Preprint Aug 2026

AffectDF: The Most Comprehensive Benchmark for Speech Deepfake Detection against Emotionally Expressive Attacks

This work introduces AffectDF, the most comprehensive benchmark for emotionally expressive speech deepfakes, spanning TTS, VC, emotional VC, and LALM-based spoofing attacks across both acted and spontaneous emotional speech.

Aurosweta Mahapatra, Xiutian Zhao, Shreeram Suresh Chandra et al. · 1 citation
Preprint Sep 2026

Not All Attacks Are Learned Equally in Speech Deepfake Detection

A replay-regularized, attack-aware curriculum that steps exposure based on measured attack influence is proposed that shows improved overall robustness and reduced attack-level imbalance compared with standard multi-attack training.

Avantika Singh, Aurosweta Mahapatra, I. R. Ulgen et al. · 0 citations
#natural language process... Preprint Aug 2026

Is Prosody Lost in Translation? Fine-Grained Cross-Lingual Prosody Similarity Across Languages

This work presents the first fine-grained cross-lingual analysis of prosody using multilingual dubbing data across English-German, English-Spanish, and English-French language pairs and reveals inherent cross-lingual correlations in prosodic structure between certain languages.

Haopeng Xie, I. R. Ulgen, Sofia Son et al. · 1 citation

DiffAnon: Diffusion-based Prosody Control for Voice Anonymization

DiffAnon is proposed, a diffusion-based anonymization method with classifier-free guidance (CFG) that provides explicit, continuous inference-time control over prosody preservation, and is the first voice anonymization framework to provide structured, interpolatable inference-time prosody control.

Ismail Rasim Ulgen, Zexin Cai, Nicholas Andrews et al. · 0 citations
#machine learning Preprint Jul 2024

Rethinking Speaker Embeddings for Speech Generation: Sub-Center Modeling for Capturing Intra-Speaker Diversity

This work revisits this design choice and proposes a sub-center modeling framework for speaker embeddings, which improves intelligibility, increases pitch variability, achieves higher naturalness ratings, and retains strong speaker verification performance in zero-shot voice conversion.

Ismail Rasim Ulgen, J. Hansen, Carlos Busso et al. · 0 citations

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