Experiments indicate that diversity of attack generation methods improves cross-dataset generalization in speech anti-spoofing more than increasing training data scale.
Exploring the Scale and Diversity of Speech Anti-spoofing Datasets: Experiments and Analysis
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abstract
The scale of speech anti-spoofing datasets has grown exponentially over the past decade, driven by the assumption that larger data leads to better performance. However, it remains unclear whether indiscriminate scaling commensurately improves model generalization. This study challenges the "scale-first" paradigm by decoupling the impacts of training data scale versus diversity. Through experiments on representative datasets, we report two key findings: (1) Larger is not always better. Expanding data scale excessively under fixed generation methods yields negligible returns and may even degrade cross-domain generalization due to overfitting.(2) Diversity outweighs scale. A smaller composite training set featuring diverse attacks significantly outperforms larger-scale datasets with limited diversity in cross-dataset evaluations. We conclude that future dataset construction should prioritize the diversity of generation methods over scale to effectively enhance model generalization.
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Exploring the Scale and Diversity of Speech Anti-spoofing Datasets: Experiments and Analysis
Experiments indicate that diversity of attack generation methods improves cross-dataset generalization in speech anti-spoofing more than increasing training data scale.