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Santiago Rubio

2 papers indexed

arxiveess.AScs.LG2026-07-03

An Intervention-Based Framework for Shortcut Diagnosis in Spoofing Countermeasures

Santiago Rubio, Pilar Bello, Dayana Ribas, Antonio Miguel, Eduardo Lleida, Alfonso Ortega

While deepfake audio detection systems achieve high performance in controlled benchmarks, their reliability often diminishes in the wild. Prior work shows that dataset-specific artifacts contribute to this gap. Yet, systematic tools to identify which acoustic properties a model e…

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arxiveess.AScs.LG2026-07-03

Open-Set Source Tracing as Compositional Factors via Structured Prototypes

Santiago Rubio, Antonio Almudévar, Antonio Miguel, Eduardo Lleida, Alfonso Ortega

Recent research expands beyond binary anti-spoofing with the emergence of Source Tracing, the task of identifying the specific generative origins of synthetic speech. However, current research often equates a "source" with its generative architecture. We propose redefining a sour…

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