SASV Based on Pre-trained ASV System and Integrated Scoring Module

TL;DR

This paper introduces a novel SASV system that leverages the correlation between anti-spoofing and speaker verification by integrating pre-trained ASV features and an advanced scoring module, achieving significant performance improvements.

Contribution

The paper proposes a Total-Divide-Total integrated SASV system that utilizes pre-trained ASV features and a new scoring method to better exploit the correlation between anti-spoofing and speaker verification.

Findings

Achieved 3.07% EER on SASV 2022 development dataset.

Reduced error rate by 25% compared to baseline systems.

Effectively integrated anti-spoofing and speaker verification tasks.

Abstract

Based on the assumption that there is a correlation between anti-spoofing and speaker verification, a Total-Divide-Total integrated Spoofing-Aware Speaker Verification (SASV) system based on pre-trained automatic speaker verification (ASV) system and integrated scoring module is proposed and submitted to the SASV 2022 Challenge. The training and scoring of ASV and anti-spoofing countermeasure (CM) in current SASV systems are relatively independent, ignoring the correlation. In this paper, by leveraging the correlation between the two tasks, an integrated SASV system can be obtained by simply training a few more layers on the basis of the baseline pre-trained ASV subsystem. The features in pre-trained ASV system are utilized for logical access spoofing speech detection. Further, speaker embeddings extracted by the pre-trained ASV system are used to improve the performance of the CM. The integrated scoring module takes the embeddings of the ASV and anti-spoofing branches as input and preserves the correlation between the two tasks through matrix operations to produce integrated SASV scores. Submitted primary system achieved equal error rate (EER) of 3.07\% on the development dataset of the SASV 2022 Challenge and 4.30\% on the evaluation part, which is a 25\% improvement over the baseline systems.