Audio Anti-spoofing Using a Simple Attention Module and Joint Optimization Based on Additive Angular Margin Loss and Meta-learning

• URL: http://arxiv.org/abs/2211.09898v1
• Date: Thu, 17 Nov 2022 21:25:29 GMT
• Title: Audio Anti-spoofing Using a Simple Attention Module and Joint Optimization Based on Additive Angular Margin Loss and Meta-learning
• Authors: Zhenyu Wang and John H.L. Hansen
• Abstract summary: This study introduces a simple attention module to infer 3-dim attention weights for the feature map in a convolutional layer. We propose a joint optimization approach based on the weighted additive angular margin loss for binary classification. Our proposed approach delivers a competitive result with a pooled EER of 0.99% and min t-DCF of 0.0289.
• Score: 43.519717601587864
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Automatic speaker verification systems are vulnerable to a variety of access threats, prompting research into the formulation of effective spoofing detection systems to act as a gate to filter out such spoofing attacks. This study introduces a simple attention module to infer 3-dim attention weights for the feature map in a convolutional layer, which then optimizes an energy function to determine each neuron's importance. With the advancement of both voice conversion and speech synthesis technologies, unseen spoofing attacks are constantly emerging to limit spoofing detection system performance. Here, we propose a joint optimization approach based on the weighted additive angular margin loss for binary classification, with a meta-learning training framework to develop an efficient system that is robust to a wide range of spoofing attacks for model generalization enhancement. As a result, when compared to current state-of-the-art systems, our proposed approach delivers a competitive result with a pooled EER of 0.99% and min t-DCF of 0.0289.

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