A normalization knowledge distillation method for a speaker verification task

By decomposing the distillation loss into target and non-target class losses using the normalized knowledge distillation method and introducing dynamic weight adjustment, the decoupling problem between target and non-target classes in the speaker verification task is solved, thereby improving the accuracy and robustness of the model.

CN122417036APending Publication Date: 2026-07-17NINGBO ARTIFICIAL INTELLIGENCE RES INST OF SHANGHAI JIAOTONG UNIV
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Patent Information

Application Number
CN202610602904.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-30
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing technologies for speaker verification tasks suffer from problems such as coupling of target and non-target information, suppression of non-target information, lack of adaptive optimization mechanisms, and weak theoretical foundation, resulting in poor knowledge distillation performance.

Method used

A normalized knowledge distillation method is adopted, which decomposes the distillation loss into the knowledge distillation loss of the target speaker and non-target speaker, and introduces a learnable decoupling weight parameter γ to dynamically adjust the non-target weight. A dynamic weight update mechanism is designed to achieve decoupling and adaptive optimization between the target class and the non-target class.

Benefits of technology

Significantly reduces equal error rate (EER) and minimum detection cost function (minDCF), improving model accuracy and robustness while maintaining the same model parameter size and computational complexity.

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Abstract

本发明公开了一种面向说话人验证任务的归一化知识蒸馏方法,涉及人工智能和语音处理技术领域,包括:步骤1、数据准备与模型选择:获取说话人识别数据集、确定教师模型和至少一个轻量化学生模型;步骤2、构建解耦知识蒸馏框架:将教师模型和学生模型的输出都分别划分为非目标类分量与目标类分量,并对非目标类分量进行归一化处理;将传统蒸馏损失分解为目标说话人知识蒸馏损失和归一化非目标说话人知识蒸馏损失;步骤3、确定损失函数与初始参数;步骤4、动态权重更新:在每个批次完成训练后,对非目标权重参数γ进行调整;步骤5、模型测试与评估:评估学生模型的性能,用错误率和最小检测代价函数对方法进行验证。
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