Input Combination Strategies for Multi-Source Transformer Decoder

Jindřich Libovický, Jindřich Helcl, David Mareček

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In multi-source sequence-to-sequence tasks, the attention mechanism can be modeled in several ways. This topic has been thoroughly studied on recurrent architectures. In this paper, we extend the previous work to the encoder-decoder attention in the Transformer architecture. We propose four different input combination strategies for the encoder-decoder attention: serial, parallel, flat, and hierarchical. We evaluate our methods on tasks of multimodal translation and translation with multiple source languages. The experiments show that the models are able to use multiple sources and improve over single source baselines.
Original languageEnglish
Title of host publicationProceedings of the Third Conference on Machine Translation: Research Papers
Place of PublicationBrussels, Belgium
PublisherAssociation for Computational Linguistics
Number of pages8
ISBN (Electronic)978-1-948087-81-0
Publication statusPublished - 31 Oct 2018
EventEMNLP 2018 Third Conference on Machine Translation (WMT18) - Brussels, Belgium
Duration: 31 Oct 20181 Nov 2018


WorkshopEMNLP 2018 Third Conference on Machine Translation (WMT18)
Abbreviated titleWMT18
Internet address


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