Guided Alignment Training for Topic-Aware Neural Machine Translation

Association for Machine Translation in the Americas (AMTA), Oct. 2016
Guided Alignment Training for Topic-Aware Neural Machine Translation
Wenhu Chen, Evgeny Matusov, Shahram Khadivi, Jan-Thorsten Peter
Categories
eBay Authors
Abstract

In this paper, we propose an effective way for biasing the attention mechanism of a sequence-to-sequence neural machine translation (NMT) model towards the well-studied statistical word alignment models. We show that our novel guided alignment training approach improves translation quality on real-life e-commerce texts consisting of product titles and descriptions, overcoming the problems posed by many unknown words and a large type/token ratio. We also show that meta-data associated with input texts such as topic or category information can significantly improve translation quality when used as an additional signal to the decoder part of the network. With both novel features, the BLEU score of the NMT system on a product title set improves from 18.6 to 21.3%. Even larger MT quality gains are obtained through domain adaptation of a general domain NMT system to e-commerce data. The developed NMT system also performs well on the IWSLT speech translation task, where an ensemble of four variant systems outperforms the phrase-based baseline by 2.1% BLEU absolute.

Another publication from the same author: Evgeny Matusov

MT Summit, Nagoya, Japan, September 2017

Neural and Statistical Methods for Leveraging Meta-information in Machine Translation

Shahram Khadivi, Patrick Wilken, Leonard Dahlmann, Evgeny Matusov

In this paper, we discuss different methods which use meta information and richer context that may accompany source language input to improve machine translation quality. We focus on category information of input text as meta information, but the proposed methods can be extended to all textual and non-textual meta information that might be available for the input text or automatically predicted using the text content. The main novelty of this work is to use state-of-the-art neural network methods to tackle this problem within a statistical machine translation (SMT) framework. We observe translation quality improvements up to 3% in terms of BLEU score in some text categories.

Another publication from the same category: Machine Translation

MT Summit, Nagoya, Japan, September 2017

Harvesting Polysemous Terms from e-commerce Data to Enhance QA

Silvio Picinini

Polysemous words can be difficult to translate and can affect the quality of Machine Translation (MT) output. Once the MT quality is affected, it has a direct impact on post-editing and on human-assisted machine translation. The presence of these terms increases the risk of errors. We think that these important words can be used to improve and to measure quality of translations. We present three methods for finding these words from e-commerce data, based on Named Entity Recognition, Part-of-Speech and Search Queries.