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.

翻译：自动演讲人核查和反措施(ASVSpoof)挑战系列是一个由社区牵头的倡议,旨在促进考虑和制定反措施,2021年ASVpoof是一系列每年两次的竞争性挑战中的第4个,其目标是制定能够区分善意和伪言或严重虚假言论的反措施,本文件对ASVspoof 2021年的挑战作了技术说明,包括培训、发展和评价数据、指标、基线、评价规则、提交程序和时间表的细节。