Improving Fluency of Non-Autoregressive Machine Translation
Table 2: BLEU scores for English-to-German translation for different beam sizes and feature sets: CTC score (c), language model (l), ratio of the blank symbols (r), and the number of trailing blank symbols (t).
['Beam Size', '1', '5', '10', '20']
We can see that combining the features is beneficial and that the improvement is substantial with larger beam sizes. The feature weights were trained separately for each beam size.