한국 대중가요 가사 유형화에 토픽 모델링(LDA 및 STM) 적용 실용성 시론 - 70년대 이후 “사랑” 주제어 관련 가사를 중심으로- = A study on the practicability of categorizing Korean popular songs by topic modeling(LDA & STM): based on lyrics with "love-centered" keywords since 1970s

다국어 초록 (Multilingual Abstract)

In Korea, popular songs could be a very important way for people to express their "love" feelings, which inspired many researchers to excavate the hidden connections between humans’ love perception and popular songs with different genres based on the lyrics with "love-centered" keywords. Traditionally, a qualitative analysis of "love-centered" lyrics should focus on several typical instances extracted from the whole samples, generalizing the characteristics of a specific writer or brief period. However, with the development of computer science and statistics, it now provides a new perspective for us to elucidate the true meanings behind the natural language texts without human beings’ subjective interpretations. This quantitative analysis method, on the one hand, can efficiently relieve the manual classification burdens and generate a more precise sorting result even than human beings' doing. On the other hand, the rigidly quantized classification criteria sometimes can also incur several enigmatic conclusions conflicting with people's intuitional judgment. To demonstrate the practicability of it, this paper hence chose to manipulate 5082 Korean "love-centered" lyrics collected from online with 2 kinds of considerably valuable "topic models": LAD & STM, aimed to 1. verify the feasibility of automatically constructing a taxonomy system of "love-centered" lyrics; 2. examine and speculate a diachronic correlation between "love-centered" lyrics and published years. As a result, it is of great necessity to optimize the themes K selection when conducting a topic modeling experiment. And based on a reasonable classification, it is possible to observe a significant regressive trend on different groups of "love-centered" lyrics through years. But because of the performance limitation of topic modelling, there are still some biased cases that can be found, which implies a further improvement not just on technical parameter testing but also on a potential collaboration between quantitative and qualitative analysis.

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