We introduce dual-decoder Transformer, a new model architecture that jointly performs automatic speech recognition (ASR) and multilingual speech translation (ST). Our models are based on the original Transformer architecture (Vaswani et al., 2017) but consist of two decoders, each responsible for one task (ASR or ST). Our major contribution lies in how these decoders interact with each other: one decoder can attend to different information sources from the other via a dual-attention mechanism. We propose two variants of these architectures corresponding to two different levels of dependencies between the decoders, called the parallel and cross dual-decoder Transformers, respectively. Extensive experiments on the MuST-C dataset show that our models outperform the previously-reported highest translation performance in the multilingual settings, and outperform as well bilingual one-to-one results. Furthermore, our parallel models demonstrate no trade-off between ASR and ST compared to the vanilla multi-task architecture. Our code and pre-trained models are available at https://github.com/formiel/speech-translation.

本文介绍了双解码器Transformer的新模型架构，该模型同时执行自动语音识别和多语言语音翻译。我们的模型基于原始Transformer体系结构，但由两个解码器组成，每个解码器负责一个任务（ASR或ST），并通过双关注机制相互交互。我们提出了两种不同的体系结构变体，分别对应于解码器之间的两个不同层次的依赖关系，称为并行双解码器Transformer和交叉双解码器Transformer。我们在MuST-C数据集上进行了大量实验，结果显示我们的模型在多语言设置中优于以前报道的最高翻译性能，并且也优于双语一对一结果。此外，我们的并行模型相对于香草多任务体系结构在ASR和ST之间没有权衡。

双解码器变压器模型实现联合自动语音识别与多语言语音翻译