Denver, Colorado, USA  /  June 27, 2024  -  June 29, 2024

AES 8th International Conference on Audio Forensics

The 2024 AES 8th International Conference on Audio Forensics will be held June 27 – 29, 2024 in Denver, Colorado. Fraunhofer IDMT will present its latest contributions on synthetic speech detection.

Calibrating synthetic speech detection systems: a likelihood ratio-based approach

Luca Cuccovillo, Patrick Aichroth, Thomas Köllmer

In this paper, we introduce a calibration procedure designed to convert the uncalibrated output scores of neural networks for synthetic speech detection into calibrated and interpretable likelihood ratios. This procedure is based on the assumption that the networks subject to calibration are deterministic and have undergone training until they reached convergence. Provided these conditions are satisfied, it is then possible to transform their output values into likelihood ratios using a minimal set of validation and calibration data, eliminating the need for retraining the models. We successfully tested the entire workflow on a state-of-the-art network example, demonstrating not only its effectiveness in calibration but also its ability to enhance fault tolerance against inadequate inputs.

The paper will be presented on June 27, 2024 at 12:45 pm