RawBoost: A Raw Data Boosting and Augmentation Method applied to Automatic Speaker Verification Anti-Spoofing

Authors: Hemlata Tak, Madhu Kamble, Jose Patino, Massimiliano Todisco, Nicholas Evans

Published: 2021-11-08 12:50:51+00:00

Comment: Accepted to IEEE ICASSP 2022

AI Summary

This paper introduces RawBoost, a novel data boosting and augmentation method designed for raw waveform inputs in automatic speaker verification anti-spoofing. RawBoost simulates nuisance variability like encoding, transmission, and distortion using a combination of linear/non-linear convolutive noise, impulsive signal-dependent noise, and stationary signal-independent noise. Experiments on the ASVspoof 2021 logical access database demonstrate that RawBoost significantly enhances the performance of a state-of-the-art raw end-to-end baseline system without requiring external data or model-level interventions.

Abstract

This paper introduces RawBoost, a data boosting and augmentation method for the design of more reliable spoofing detection solutions which operate directly upon raw waveform inputs. While RawBoost requires no additional data sources, e.g. noise recordings or impulse responses and is data, application and model agnostic, it is designed for telephony scenarios. Based upon the combination of linear and non-linear convolutive noise, impulsive signal-dependent additive noise and stationary signal-independent additive noise, RawBoost models nuisance variability stemming from, e.g., encoding, transmission, microphones and amplifiers, and both linear and non-linear distortion. Experiments performed using the ASVspoof 2021 logical access database show that RawBoost improves the performance of a state-of-the-art raw end-to-end baseline system by 27% relative and is only outperformed by solutions that either depend on external data or that require additional intervention at the model level.