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Translating university lectures in multiple languages

Date:
June 14, 2019
Source:
Nara Institute of Science and Technology
Summary:
Researchers report a new machine translation system that outputs subtitles in multiple languages for archived university lectures. As countries like China and Japan expand their international student cohort, this system could relax language demands and allow the students to study in their mother tongue.
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FULL STORY

Advances in communication technology have had a major impact in all sorts of industries, but perhaps none bigger than in education. Now anyone from around the world can listen live to a Nobel Prize Laureate lecture or earn credits from the most reputable universities with nothing more than internet access. However, the possible information to be gained from watching and listening online is lost if the audience cannot understand the language of the lecturer. To solve this problem, scientists at the Nara Institute of Science and Technology (NAIST), Japan, presented a solution with new machine learning at the 240th meeting of the Special Interest Group of Natural Language Processing, Information Processing Society of Japan (IPSJ SIG-NL).

Machine translation systems have made it remarkably simple for someone to ask for directions to their hotel in a language they have never heard or seen before. Sometimes the systems can make amusing and innocent errors, but overall achieve coherent communication, at least for short exchanges usually only a sentence or two long. In the case of a presentation that can extend past an hour, for example, an academic lecture, they are far less robust.

“NAIST有20%的外国学生,而全国矿工工会ber of English classes is expanding, the options these students have are limited by their Japanese ability," explains NAIST Professor Satoshi Nakamura, who led the study.

Nakamura's research group acquired 46.5 hours of archived lecture videos from NAIST with their transcriptions and English translations, and developed a deep learning-based system to transcribe Japanese lecture speech and to translate it into English. While watching the videos, users would see subtitles in Japanese and English that matched the lecturer's speaking.

One might expect the ideal output would be simultaneous translations that could be done with live presentations. However, live translations limit the processing time and thus the accuracy.

"Because we are putting videos with subtitles in the archives, we found better translations by creating subtitles with a longer processing time," he says.

The archived footage used for the evaluation consisted of lectures from robotics, speech processing and software engineering. Interestingly, the word error rate in speech recognition correlated to disfluency in the lecturers' speech. Another factor from the different error rates was the length of time speaking without pause. The corpus used for the training was still insufficient and should be developed more for further improvements.

"Japan wants to increase its international students and NAIST has a great opportunity to be a leader in this endeavor. Our project will not only improve machine translation, it will also bring bright minds to the country," he continued.

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Materials provided byNara Institute of Science and Technology.注意:内容可能被编辑风格d length.


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Nara Institute of Science and Technology. "Translating university lectures in multiple languages." ScienceDaily. ScienceDaily, 14 June 2019. /releases/2019/06/190614082935.htm>.
Nara Institute of Science and Technology. (2019, June 14). Translating university lectures in multiple languages.ScienceDaily. Retrieved August 21, 2023 from www.koonmotors.com/releases/2019/06/190614082935.htm
Nara Institute of Science and Technology. "Translating university lectures in multiple languages." ScienceDaily. www.koonmotors.com/releases/2019/06/190614082935.htm (accessed August 21, 2023).

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