We introduce an Edit-Based Transformer with Repositioning (EDITOR), which makes sequence generation flexible by seamlessly allowing users to specify preferences in output lexical choice. Building on recent models for non-autoregressive sequence generation (Gu et al., 2019), EDITOR generates new sequences by iteratively editing hypotheses. It relies on a novel reposition operation designed to disentangle lexical choice from word positioning decisions, while enabling efficient oracles for imitation learning and parallel edits at decoding time. Empirically, EDITOR uses soft lexical constraints more effectively than the Levenshtein Transformer (Gu et al., 2019) while speeding up decoding dramatically compared to constrained beam search (Post and Vilar, 2018). EDITOR also achieves comparable or better translation quality with faster decoding speed than the Levenshtein Transformer on standard Romanian-English, English-German, and English-Japanese machine translation tasks.

本文介绍了一种基于编辑的转换器，其通过编辑假设使序列生成更加灵活。 实验证明，它在处理序列时，比Levenshtein Transformer更有效，并且在标准的机器翻译任务中可以实现与Levenshtein Transformer相媲美的翻译质量和更快的解码速度。

基于编辑和重定位的编辑器——用于具有软词汇约束的神经机器翻译