  The automatic speaker verification spoofing and countermeasures (ASVspoof)
challenge series is a community-led initiative which aims to promote the
consideration of spoofing and the development of countermeasures. ASVspoof 2021
is the 4th in a series of bi-annual, competitive challenges where the goal is
to develop countermeasures capable of discriminating between bona fide and
spoofed or deepfake speech. This document provides a technical description of
the ASVspoof 2021 challenge, including details of training, development and
evaluation data, metrics, baselines, evaluation rules, submission procedures
and the schedule.
