• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권5호
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• pp.2544-2557
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• 2019

Adaptive bitrate streaming is a crucial element in the implementation of high-quality streaming of media content over the Internet. Dynamic adaptive streaming over HTTP (MPEG-DASH) has lately emerged as the de facto solution for over-the-top (OTT) video streaming services. In this paper, we perform macro-level analysis on a real-world MPEG-DASH-based Internet live broadcasting service to gain insight into its behavior throughout the end-to-end service-provision chain, from broadcasters to viewers. Based on this analysis, we propose methods to improve the quality-of-experience (QoE) of MPEG-DASH-based services, particularly with regard to reducing broadcasting delays between recording and viewing of videos, as well as synchronizing client terminals.

• 방송공학회논문지
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• 제28권2호
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• pp.185-193
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• 2023

최근 인터넷을 통한 동영상 제공 서비스가 확대됨에 따라 높은 품질의 온라인 컨텐츠에 대한 수요가 급증하고 있다. 그런데 넓은 동적 범위 (dynamic range)를 표현할 수 있는 high dynamic range (HDR) 컨텐츠의 공급은 수요를 따라가지 못하고 있는 실정이다. 따라서 본 논문에서는 HDR 영상 제작의 한 방법으로서, 여러 노출값에서 촬영된 프레임들로 구성된 low dynamic range (LDR) 동영상을 이용해 HDR 영상을 생성하는 방법을 제안한다. 우선, 프레임들 사이에 움직임이 존재하기 때문에 정렬 과정을 통해 이웃 프레임들을 중심 프레임에 맞추어 정렬한다. 이때 내용 (content) 기반의 정렬을 하여 정확도를 높이고, 원래 크기의 입력을 그대로 이용하는 모듈을 함께 사용하여 세부 정보도 잘 살려준다. 그러고 나서 잘 정렬된 다중 프레임들을 합쳐서 하나의 HDR 프레임으로 만들어 준다. 실험을 통해 기존 방법들에 비해 우수한 성능을 보임을 확인하였다.

• Journal of Korea Trade
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• 제26권7호
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• pp.145-166
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• 2022

Purpose - The field of online videos has seen rapid changes in information and communications technology (ICT) development. Despite active academic research on the use of online platforms, few studies have analyzed the relative importance among the factors determined. In this study, the relative importance of factors found in previous studies was identified for users of online video platforms in China and Korea. Through this, factors that should be considered first in research on online video use were derived. In addition, the quality level of online video platforms currently used in China and Korea was measured and used for analysis. The analysis results can provide information for companies to enter Chinese and Korean markets and also be useful to platform providers aiming to increase usage. Design/methodology - Among the factors of Online Video Usage identified in previous studies, 13 factors to be studied were selected through focus group interviews and hierarchized into 2 layers. For the analytic hierarchy process (AHP), each factor was designed as a pairwise comparison questionnaire. The survey included questions on the quality of online video platform currently in use. Data collection was conducted on 16 platforms in China and 11 platforms in Korea, and the relative importance of factors and user perspectives was compared and analyzed using importance performance analysis (IPA). In the analytical process, platforms were divided into over-the-top (OTT) group and Creator group according to the weight of user-generated content, and data analysis focused on these groups. Findings - As a result of AHP, China and Korea showed both "Fun" and "Interests" factors at the top, while the importance of the Entertainment factor "Vicarious satisfaction" was very different for China and Korea. "Relationship with content creators" was the most important factor in China, but it ranked the lowest in Korea. The IPA showed that the factors with high importance and performance were fun, interests, and easy accessibility for both China and Korea. In contrast, the factors that showed low performance compared to high importance in China were relationship with content creators, relationship with acquaintances/friends, and trustworthiness. As for Korea, vicarious satisfaction was observed; thus, this study has raised the need for academic and industrial interest in vicarious satisfaction. The results show that fun, interests, vicarious satisfaction, and easy accessibility of the platform are factors that must be included in further studies on online videos. Originality/value - Existing studies related to the use of online platforms have derived factors or focused on the influence relationship between factors and performance. However, few studies have analyzed the relative importance among the determined factors. This paper explores factors to be considered in future studies by deriving the relative importance between these factors from the perspective of users in China and Korea.

• Journal of Information Processing Systems
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• 제18권4호
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• pp.470-479
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• 2022

Mukbang is a type of foodcasting where a host records or streams their eating rituals for audience consumption in live format. With origins in South Korea via the online broadcast genre found on Afreeca TV in the mid-2000s, the phenomenon has since found global popularity. Its development as a full-fledged genre is based on a communication culture that invites people to a meal rather than to talk to one another; viewers watch in silence as a host consumes a copious number of dishes from Korean gastronomy to fast food to other ethnic cuisine on display. An invitation to eat means the beginning of a public relationship that quickly turns to a private shared experience. This study analyzes several Mukbang video postings and makes use of Linden's culture approach model to provide a view toward a number of cross-cultural connections by Koreans and non-Korean audiences. Prior to the study, 10 Korean eating shows were selected and used as standard models. Korean Mukbang mainly consists of eating behavior and ASMR, with very few storytelling or narrative devices utilized by its creators. For this reason, eating shows make a very private connection. In other ways, this paper shows how 28 Mukbang-related YouTube contents selected by Ranker were evolving and examined through notions of acculturation and reception theory.

• 디지털융복합연구
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• 제17권11호
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• pp.523-530
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• 2019

본 연구에서는 한류 콘텐츠 자막 제작에 참여하는 해외 이용자들을 대상으로 자막 제작 활동의 동기와 인식, 커뮤니티 내의 한류 문화소비 등을 알아보고, 이것이 내포하는 한류 콘텐츠 글로벌 팬덤 현상의 특징과 의미를 살펴보았다. 한류 팬들이 자발적으로 한국 드라마 자막을 자국 언어로 제작하고, 이를 통해 가장 영향력있는 한류 플랫폼으로 성장한 동영상서비스인 비키를 연구대상으로 했으며, 자막제작 팬 커뮤니티에 참여하는 영어, 불어, 독일어, 스페인어, 루마니아어, 아랍어권 이용자 등 총13명의 자막 제작자들에 대한 이메일 심층인터뷰를 통해 연구를 진행했다. 연구결과, 팬 커뮤니티에서 발현되는 집단지성은 전문가 이상의 결과물을 만들어내고 있으며, 이들은 한류 콘텐츠의 소비자이자 문화생산자, 제2의 창작자로서 역할을 하고 있다. 나아가 한류 문화소비의 시공간을 확대하며 또 다른 한류 팬을 불러 모으는 선순환 구조를 구축하고 있다. 앞으로 한류 콘텐츠의 지속적인 확산을 위해, 뉴미디어 플랫폼의 팬 커뮤니티 활동과 네트워크 효과가 결합된 글로벌 팬덤의 방향성에 주목하고, 이를 더 활성화하는 장기적인 전략 연구에 관심을 기울일 필요가 있다.