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Kijong Han

4 accepted papers

2022

LittleBird: Efficient Faster & Longer Transformer for Question Answering

EMNLP 2022main

BERT has shown a lot of sucess in a wide variety of NLP tasks. But it has a limitation dealing with long inputs due to its attention mechanism. Longformer, ETC and BigBird addressed this issue and effectively solved the quadratic dependency problem.However we find that these models are not sufficien…

2021

An Evaluation Dataset and Strategy for Building Robust Multi-turn Response Selection Model

EMNLP 2021main

Multi-turn response selection models have recently shown comparable performance to humans in several benchmark datasets. However, in the real environment, these models often have weaknesses, such as making incorrect predictions based heavily on superficial patterns without a comprehensive understand…

2021

Do Response Selection Models Really Know What’s Next? Utterance Manipulation Strategies for Multi-turn Response Selection

AAAI 2021technical

In this paper, we study the task of selecting the optimal response given a user and system utterance history in retrieval-based multi-turn dialog systems. Recently, pre-trained language models (e.g., BERT, RoBERTa, and ELECTRA) showed significant improvements in various natural language processing t…

2019

Phonemic-level Duration Control Using Attention Alignment for Natural Speech Synthesis

ICASSP 2019accepted

Recent attention-based end-to-end speech synthesis from text systems have achieved human-level performance. However, many approaches cause a sequence-to-sequence model to generate only averaged results of the input text, making it difficult to control the duration of utterance. In this study, we pre…

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