Chanjun Park

About Me

Hi! I am a MS/Ph.D student in the Department of Computer Science and Engineering at Korea University. My advisor is Prof. Heuiseok Lim, and I am part of the Natural Language Processing & Artificial Intelligence Lab. See CV for more information.

Research Interest

Neural Machine Translation, Domain Specialized Neural Machine Translation, Ancient Korean Neural Machine Translation, Simultaneous Speech Translation, Automatic Post Editing, Quality Estimation, Korean Spelling Correction, Grammar Error Correction, Speech Recognition Post-Processor, AI for Accessibility, AI for Education

Professional Experience

2018.09 - 2019.07: SYSTRAN Research Engineer
2018.06 - 2018.08: SYSTRAN Research Engineer Intern

Publications

Top Conference

  1. Should we find another model?: Improving Neural Machine Translation Performance with ONE-Piece Tokenization Method without Model Modification
    Chanjun Park, Sugyeong Eo, Hyeonseok Moon, Heuiseok Lim
    NAACL-HLT 2021 Industry Track, 2021 (Accept)

International Journal (SCI/SCIE)

  1. Exploring the Data Efficiency of Cross-Lingual Post-Training in Pretrained Language Models
    Chanhee Lee, Kisu Yang, Taesun Whang, Chanjun Park, Andrew Matteson, Heuiseok Lim
    Applied Sciences, 11(5), 2021

  2. Decoding Strategies for Improving Low-Resource Machine Translation
    Chanjun Park, YeongWookYang, Kinam Park, Heuiseok Lim
    Electronics, 9(10), 2020

  3. Ancient Korean Neural Machine Translation
    Chanjun Park, Chanhee Lee, YeongWookYang, Heuiseok Lim
    IEEE Access, Volume.8, 116617-116625, 2020

  4. Comparison of the evaluation metrics for Neural Grammatical Error Correction with Overcorrection
    Chanjun Park, YeongWookYang, Chanhee Lee, Heuiseok Lim
    IEEE Access, Volume.8, 106264-106272, 2020

  5. Neural Spelling Correction: Translating Incorrect sentences to Correct sentences for Multimedia
    Chanjun Park, Kuekyeng Kim, YeongWookYang, Minho Kang, Heuiseok Lim
    Multimedia Tools and Applications(2020) pp. 1–18. Springer, 2020

Domestic Journal (KCI)

  1. A study on performance improvement considering the balance between corpus in Neural Machine Translation
    Chanjun Park, Kinam Park, Sugyeong Eo, Hyeonseok Moon, Heuiseok Lim
    Journal of the Korea Convergence Society, 2021 (Accept)

  2. Filter-mBART Based Neural Machine Translation Using Parallel Corpus Filtering
    Hyeonseok Moon, Chanjun Park, Sugyeong Eo, JeongBae Park, Heuiseok Lim
    Journal of the Korea Convergence Society, 2021 (Accept)

  3. Research on Subword Tokenization of Korean Neural Machine Translation and Proposal for Tokenization Method to Separate Jongsung from Syllables
    Sugyeong Eo, Chanjun Park, Hyeonseok Moon, Heuiseok Lim
    Journal of the Korea Convergence Society, 2021 (Accept)

  4. Cross-Validated Ensemble Methods in Natural Language Inference
    Kisu Yang, Taesun Whang, Dongsuk Oh, Chanjun Park, HeuiSeok Lim
    Journal of KIISE, 48(2), 154-159, 2021

  5. Neural Machine translation specialized for Coronavirus Disease-19(COVID-19)
    Chanjun Park, Kyeonghee Kim, Kinam Park, Heuiseok Lim
    Journal of the Korea Convergence Society, 11(9), 7-13, 2020

  6. An AI Service to support communication and language learning for people with developmental disability
    Chanjun Park, Yang-Hee Kim, Yoonna Jang, Umadevi G.R, Heuiseok Lim
    Journal of the Korea Convergence Society, 11(6), 51-57, 2020

  7. A Study on the Performance Improvement of Machine Translation Using Public Korean-English Parallel Corpus
    Chanjun Park, Heuiseok Lim
    Journal of Digital Convergence, 18(6), 271-277, 2020

  8. Automatic Post Editing Research
    Chanjun Park, Heuiseok Lim
    Journal of the Korea Convergence Society, 11(5), 1-8, 2020

International Conference

  1. Domain-specialize Neural Machine Translation Methodology
    Chanjun Park, Heuiseok Lim
    International conference on Interdisciplinary research on Computer Science, Psychology, and Education (ICICPE 2020)

  2. Design Neural Machine Translation Model Combining External Symbolic Knowledge in translation task
    Sugyeong Eo, Chanjun Park, Heuiseok Lim
    International conference on Interdisciplinary research on Computer Science, Psychology, and Education (ICICPE 2020)

  3. PicTalky: Deep learning-based speech therapy platform for developmental disabilities
    Chanjun Park, Yanghee Kim, Yoonna Jang, Umadevi G.R, HeuiSeok Lim
    The International Conference on Big data, IoT, and Cloud Computing (BIC 2020)

  4. Toward High Quality Parallel Corpus Using Monolingual Corpus
    Chanjun Park, Youngdae Oh, Jongkeun Choi, Dongpil Kim, HeuiSeok Lim
    The 10th International Conference on Convergence Technology (ICCT 2020)

  5. Can artificial intelligence translate the Annals of the Joseon Dynasty ?
    Chanjun Park, Sungjin Park, Kinam Park, Jaechoon Jo, HeuiSeok Lim
    The 10th International Conference on Convergence Technology (ICCT 2020)

  6. Self- Supervised Korean Spelling Correction via Denoising Transformer
    Chanjun Park, Sungjin Park, Heuiseok Lim,
    INTERNATIONAL CONFERENCE ON INFORMATION, SYSTEM AND CONVERGENCE APPLICATIONS(ICISCA 2020)

  7. Data Augmentation Method for Korean Neural Machine Translations
    Chanjun Park, Kinam Park, Heuiseok Lim
    INTERNATIONAL CONFERENCE ON INFORMATION, SYSTEM AND CONVERGENCE APPLICATIONS(ICISCA 2020)

  8. Quality before Quantity: Improved Machine Translation performance using parallel corpus filtering
    Chanjun Park, Seunggyu Han, Heuiseok Lim
    International conference on Interdisciplinary research on Computer Science, Psychology, and Education (ICICPE 2019)

  9. Improved Machine Translation Performance Using Two Stage Subword Tokenization
    Chanjun Park, Sora Choi, Heuiseok Lim
    International conference on Interdisciplinary research on Computer Science, Psychology, and Education (ICICPE 2019)

  10. Improved Machine Translation Performance Using Relative Ratio of Original and Synthetic Corpus
    Chanjun Park, Jang Mook Kang
    International conference on Interdisciplinary research on Computer Science, Psychology, and Education (ICICPE 2019)

  11. Free Talking NAO Robot for Children
    Chanjun Park, Jaekue choi, Sungjin Park, Yanghee Kim, HeuiSeok Lim
    International conference on Interdisciplinary research on Computer Science, Psychology, and Education (ICICPE 2019)

Domestic Conference

  1. Quality, not Quantity? : Effect of parallel corpus quantity and quality on Neural Machine Translation
    Chanjun Park, Yeonsu Lee, Chanhee Lee, HeuiSeok Lim
    The 32st Annual Conference on Human & Cognitive Language Technology

  2. Alleviation of Overcorrection Problem in Neural Korean Spelling Correction
    Chanjun Park, Yeonsu Lee, Kisu Yang, HeuiSeok Lim
    The 32st Annual Conference on Human & Cognitive Language Technology

  3. Cross-Lingual Transfer of Pretrained Transformers to Resource-Scarce Languages (Best Paper Award)
    Chanhee Lee, Chanjun Park, Gyeongmin Kim, Dongsuk Oh, HeuiSeok Lim
    The 32st Annual Conference on Human & Cognitive Language Technology

  4. Design Neural Machine Translation Model Combining External Symbolic Knowledge
    Sugyeong Eo, Chanjun Park, HeuiSeok Lim
    The 32st Annual Conference on Human & Cognitive Language Technology

  5. MMA: Multi-modal Message Aggregation for Korean VQA
    Sungjin Park, Chanjun Park, Jaehyung Seo, HeuiSeok Lim
    The 32st Annual Conference on Human & Cognitive Language Technology

  6. Korean Spell Correction based on Denoising Transformer
    Chanjun Park, Jeong Sol , Kisu Yang, Sumi Lee, Jaechoon Jo, HeuiSeok Lim
    The 31st Annual Conference on Human & Cognitive Language Technology

  7. Optimization of Data Augmentation Techniques in Neural Machine Translation
    Chanjun Park, Kuekyeng Kim, HeuiSeok Lim
    The 31st Annual Conference on Human & Cognitive Language Technology

  8. Parallel Corpus Filtering and Korean-Optimized Subword Tokenization for Machine Translation
    Chanjun Park, Gyeongmin Kim, HeuiSeok Lim
    The 31st Annual Conference on Human & Cognitive Language Technology

  9. Comparative Study of Sentiment Analysis Model based on Korean Linguistic Chracteristics
    Gyeongmin Kim, Chanjun Park, Jaechoon Jo, HeuiSeok Lim
    The 31st Annual Conference on Human & Cognitive Language Technology

  10. Cross-Validated Ensemble Methods in Natural Language Inference (Best Paper Award)
    Kisu Yang, Taesun Whang, Dongsuk Oh, Chanjun Park, HeuiSeok Lim
    The 31st Annual Conference on Human & Cognitive Language Technology

  11. Korean Spacing Module using Eojeol dictionary and Morpheme dictionary
    Chanjun Park, Jin-hyuk Choi, Pummo Ryu
    Korea Software Congress 2018

  12. Voice recognition performance improvement using TTS system in address recognition system
    Chanjun Park, Suntae Kim, Minho Kang, Myeongjin Hwang, Byunggun Park, Yeonsu Kim
    Korea Software Congress 2018

  13. Knowledge-enhancing Real-time Lecture interpreter service Development
    Chanjun Park, Minho Kang, Byunggun Park, Suntae Kim, Myeongjin Hwang, Dongpil Kim, Young-kil Kim
    Korea Software Congress 2018

  14. Improved speech recognition performance in business meeting environments using domain-specific method
    Chanjun Park, Suntae Kim, Minho Kang, Byunggun Park, Myeongjin Hwang, Yeonsu Kim
    Korea Software Congress 2018

  15. Two-Stage Korea Compound Noun Decomposer
    Chanjun Park, Pummo Ryu
    The 30st Annual Conference on Human & Cognitive Language Technology

  16. Spam/Ham Classification using Ensemble Technique of Machine Learning Algorithms
    Chanjun Park, Pummo Ryu
    Korea Computer Congress 2018

  17. Dictionary based Compound Noun Decomposer using Resource extension
    Chanjun Park, Hyejin Won, Pummo Ryu
    Korea Computer Congress 2018

Book Chapters

  1. Natural Langugae Processing Bible
    HeuiSeok Lim, Korea University NLP&AI Lab
    Human Science

Patents

  1. Improving speech recognition performance using TTS in domain-specific environment
    HeuiSeok Lim, Chanjun Park

  2. One-to-Many Multilingual Multi-Intelligent Correction System MMIC (Multilingual-Multi -Intelligence-Correction)
    HeuiSeok Lim, Chanjun Park

  3. METHOD OF BUILDING TRAINING DATA OF MACHINE TRANSLATION
    HeuiSeok Lim, Chanjun Park

  4. Correction performance evaluation metrics of neural network machine translation and method of constructing the same
    HeuiSeok Lim, Chanjun Park

  5. APPARATUS AND METHOD FOR OUTPUTTING IMAGE CORRESPONDING TO LANGUAGE
    HeuiSeok Lim, Chanjun Park, Yanghee Kim

  6. METHOD OF TRANSLATING ANCIENT KOREAN USING MACHINE TRANSLATION
    HeuiSeok Lim, Chanjun Park

  7. Device and method for correcting Korean spelling
    HeuiSeok Lim, Chanjun Park

Teaching

  1. Introduction to Natural Language Processing in Big Data (BDC101), Head Teaching Assistant, Korea Univ. (Autumn 2020)
  2. Natural Language Processing for Digital Finance Engineering (DFE610), Head Teaching Assistant, Korea Univ. (Autumn 2020)
  3. Natural Language Processing (COSE461), Teaching Assistant, Korea Univ. (Spring 2020)
  4. Artificial Intelligence and Natural Language Processing (DFC615), Teaching Assistant, Korea Univ. (Spring 2020)

Honors & Awards

Year Award
2020.11 1st Place in Flitto Hackathon (Team Lead)
2020.10 Best Paper Award, The 32nd Annual Conference on Human & Cognitive Language Technology (HCLT2020)
2020.05 Best practices for using NIA AI training data(Korean-English Neural Machine Translation model), NIA
2019.10 Best Paper Award, The 31st Annual Conference on Human & Cognitive Language Technology (HCLT2019)
2019.10 1st Place Microsoft AI Accessibility Hackathon in Korea (Team Lead), Microsoft
2019.03 Graduate School Associate Scholarship, Sungkyunkwan University
2018.10 Next Generation Information Processing NLP Competition 2018: Participation Award, Next-generation information computing technology development business
2017.06 Bit Computer Excellence Award (President Award), Bit Computer
2017.12 Scholarship for academic excellence, Sooyoungro Church
2016.12 Scholarship for academic excellence, Sooyoungro Church
2015.03 Full Scholarship, BUFS

Invited Talk

Year Place Contents
2020.03 LLsoLLu Latest natural language processing Research
2020.02 NC SOFT Technology Transfer Seminar
2020.01 Dongguk University A.I - NLP - MT for Liberal Arts
2019.10-2019.11 SKC Text Preprocessing, Machine Translation, Language Embedding
2019.08 SK T Academy Machine Translation for everyone
2019.08 NAVER Machine Translation for everyone

Demos

  1. Grammar Error Correction Platform
  2. Korea Spelling Error Correction
  3. Korea University Neural Machine Translation Platform
  4. Neural Symbolic Inference
  5. Korean Ancient Neural Machine Translation Platform
  6. PicTalky: Text to Pictogram for Children with Developmental Disabilities
  7. COVID-19 Machine Translation Platform
  8. English Free Talking and Grammar Error Correction Feed Back System using NAO Robot, Ver01, Ver02
  9. Ancient Korean Translation & Machine Reading Comprehension with NAO
  10. Bilingual Education Using NAO
  11. Ko-CSS (Korean Colloquial-Sentence-Splitter) for simultaneous speech translation