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Reproduction of paper Void: A Fast and Light Voice Liveness Detection System

Python 100.00%

void-voice-liveness-detection's Introduction

void-voice-liveness-detection

Reproduction of paper Void: A Fast and Light Voice Liveness Detection System

任务描述

  • 受到2020 USENIX Security论文“Void: A fast and light voice liveness detection system”的启发,尝试复现文中描述的轻量化语音活体检测方法;
  • 任务 1:从语音样本中提取由4种子特征构成的Void语音特征向量;
  • 任务 2:训练合适的SVM分类器,用于准确区分真人语音和仿冒攻击语音;

数据集

  • 主要基于ASVspoof 2017 Version 2.0数据集;
  • 原文中为了验证Void系统的活体检测效果,作者还引入了自建重放攻击数据集以及隐藏语音、超声语音指令、合成语音等多种攻击方式;

代码功能简介

  • data_preparation.py
    • ASVspoof 2017 V2数据集的训练集、开发集和测试集的语音中分别提取Void特征并保存在features_labels路径下;
    • 特征提取相关函数在feature_extraction.py中定义;
  • train_svm.py
    • 特征提取完成后,使用训练集和开发集中的特征向量训练SVM分类器,训练好的模型保存在models路径下;
    • 根据原文中的实验结果,采用RBF核的SVM取得了最低的等错误率(EER=11.6%);
  • svm_evaluation.py
    • 用于单独验证一个已训练好的SVM分类器在测试集数据上的效果;

效果

  • 目前该项目在ASVspoof 2017 V2测试集上的等错误率与原文中的指标仍存在较大差距;
  • 该项目会持续改进,同时也欢迎大家针对特征提取过程和模型训练过程提出宝贵建议;

参考文献

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