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An End-to-End Method for Data Filtering on Tibetan-Chinese Parallel Corpus via Negative Sampling

  • Sangjie Duanzhu
  • Cizhen Jiacuo
  • Rou Te
  • Sanzhi Jia
  • Cairang JiaEmail author
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11856)

Abstract

In the field of machine translation, parallel corpus serves as the most important prerequisite for learning complex mappings between targeted language pairs. However, in practice, the scale of parallel corpus is not necessarily the only factor to be taken into consideration for improving performance of translation models due to the quality of parallel data itself also has tremendous impact on model capacity. In recent years, neural machine translation systems have become the de facto choice of implementation in MT research, but they are more vulnerable to noisy disturbance presented in training data compared with traditional statistical machine translation models. Therefore, data filtering is an indispensable procedure in NMT pre-processing pipeline. Instead of utilizing discrete feature representations of basic language units to build a ranking function of given sentence pairs, in this work, we proposed a fully end-to-end parallel sentence classifier to estimate the probability of given sentence pairs being equivalent translation for each other. Our model was tested in three scenarios, namely, classification, sentence extraction and NMT data filtering tasks. All testing experiments showed promising results, and especially in Tibetan-Chinese NMT experiments, 3.7 BLEU boost was observed after applying our data filtering method, indicating the effectiveness of our model.

Keywords

Tibetan-Chinese Data filtering Neural machine translation 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Sangjie Duanzhu
    • 1
  • Cizhen Jiacuo
    • 1
  • Rou Te
    • 1
  • Sanzhi Jia
    • 1
  • Cairang Jia
    • 1
    Email author
  1. 1.Key Laboratory of Tibetan Information Processing and Machine TranslationQinghai Normal UniversityXiningChina

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