ESPnet-ST-v2 is a revamp of the open-source ESPnet-ST toolkit necessitated by the broadening interests of the spoken language translation community. ESPnet-ST-v2 supports 1) offline speech-to-text translation (ST), 2) simultaneous speech-to-text translation (SST), and 3) offline speech-to-speech translation (S2ST) -- each task is supported with a wide variety of approaches, differentiating ESPnet-ST-v2 from other open source spoken language translation toolkits. This toolkit offers state-of-the-art architectures such as transducers, hybrid CTC/attention, multi-decoders with searchable intermediates, time-synchronous blockwise CTC/attention, Translatotron models, and direct discrete unit models. In this paper, we describe the overall design, example models for each task, and performance benchmarking behind ESPnet-ST-v2, which is publicly available at https://github.com/espnet/espnet.

翻译：ESPnet-ST-v2 是开源ESPnet-ST工具包的升级版本，旨在满足口语翻译领域日益广泛的研究需求。该工具包支持：1）离线语音到文本翻译（ST），2）同步语音到文本翻译（SST），以及3）离线语音到语音翻译（S2ST）。每项任务均集成多种技术方案，这使得ESPnet-ST-v2区别于其他开源口语翻译工具包。本工具包提供包括转换器、混合CTC/注意力机制、带可搜索中间表示的多解码器、时间同步分块CTC/注意力机制、Translatotron模型以及直接离散单元模型在内的先进架构。本文详细阐述了ESPnet-ST-v2的整体设计、各任务示例模型及性能基准测试结果，工具包开源地址为https://github.com/espnet/espnet。