• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.11a
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• pp.54-56
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• 2012

본 논문에서는 이어폰 및 헤드폰 환경에서 스테레오 음원의 공간 정보를 보존하고 청취자의 엔벨롭감을 향상시키기 위한 Binaural 렌더링 기법을 제안하였다. 스테레오를 그대로 Binaural 렌더링 하지 않고 업믹스를 통해 스테레오 음원을 5.1채널의 음원을 생성한 뒤에 5.1패널 포맷의 스피커 위치 기반에 의해 렌더링 시킨다. 제안된 알고리즘은 두 가지 단계로 나뉘는데 첫 번째 단계로 스테레오 음원을 주성분 분석법( PCA )을 통하여 primary와 ambient신호로 각각 분리 하고 두 번째 단계로 분리한 primary와 ambient신호를 스테레오의 공간 정보에 기반 하여 머리전달 함수 (HRTF)를 이용하여 렌더링 한다. 또한 초기 잔향을 이용한 외재화 기법을 통하여 음원을 머리 밖에 정위시킴으로써 음원의 공간감을 향상시켰다. 제안된 방법은 주관적인 평가를 통하여 기존의 방법보다 우수한 성능을 보임을 확인하였다.

• Proceedings of the Korean Information Science Society Conference
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• 2007.10d
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• pp.477-481
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• 2007

디지털 카메라의 성능향상과 보급으로 인하여 빛을 필름에 투영하여 촬영을 하는 필름 카메라보다 CCD, CMOS를 사용하는 디지털 카메라, 카메라 폰 등이 더욱 인기를 끌고 있다. 이러한 디지털 이미지를 보관하기 위하여 최근에는 사진을 보관 및 감상을 위한 목적의 전자액자가 등장하였고 LCD 패널의 가격 하락과 맞물려 전자액자의 가격도 점차 낮아져 새로운 사진 감상용 매체로 떠오르고 있다. 하지만 현재의 전자액자는 주로 사진 출력과 로컬의 동영상 재생의 기능만을 가지고 있다. 따라서 본 논문에서는 디지털 전자액자를 위한 네트워크 적응적 스트리밍 미디어 서비스를 구현하고자 한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2011.11a
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• pp.117-120
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• 2011

240 Hz 이상의 높은 프레임율을 가지는 LCD 기반 평판 FHD급 디스플레이 시스템은 높은 프레임율로 인하여 디스플레이 패널로 전송해야하는 유효한 데이터율이 1.9GB/s까지 이르게 되며, 수평/수직 동기를 감안하면 2GB/s 이상의 데이터 전송 대역이 필요하다. DRAM을 이용하여 이런 데이터 대역폭을 제공하려면 다수의 메모리 장치를 사용해야하기 때문에, 비용 상승, 전력소모량 증가 등의 문제를 야기한다. 이런 문제를 해결하기 위하여 본 논문에서는 JPEG 기반의 정지 영상 압축 시스템을 제안한다. 제안한 시스템은 8개의 디코더가 동시에 동작하는 구조를 가지고 있으며, 단일 데이터 열로부터 8개의 데이터 열을 용이하게 구분할 수 있도록 128-bit 데이터에 정렬된 64-bit 마커를 사용한다. 제안한 64-bit 마커는 마커 에뮬레이션을 야기하지 않도록 설계되었기 때문에, 인코더와 디코더의 구현 복잡도를 낮출 수 있고 단일 데이터열을 8개의 데이터열로 분리하는 작업을 매우 용이하게 한다.

• Journal of Korea Multimedia Society
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• v.22 no.2
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• pp.117-127
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• 2019

Simultaneous pattern measurement system is new research subject for OLED panel inspection. It is defect inspection of OLED panel after deposition. This research suggests the system that calculates the size and center point of each patterns after obtaining standard and deposition pattern as one image. This system could be applied to OLED manufacturing process. The research result shows that the size and center point of each patterns could be obtained by displaying the standard pattern and deposition pattern in one image.

• The KIPS Transactions:PartD
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• v.9D no.2
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• pp.313-322
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• 2002

Multimedia conference systems are classified into the tightly coupled conference and the loosely-coupled conference, the former is a peer-to-peer-conference or multi-point-conference based un the ITU-T H.323 standard, and the latter is the H.332 standard extended from the ITU-T H.323 standard. Loosely-coupled conference based on the H.332 standard is composed of small participants with the capacity of the send-receive mode and large participants with the capacity of the receive-only mode. In the H.332 conference, a subject and a media type of the multimedia conference is pre-announced for conquest of the difficulty of capability negotiation, and used SDP of IETF for that. Therefore, the H.332-conference can conquer a defect of the H.323 multimedia conference scalability. This paper analyzes H.332 standard for the loosely-coupled conference and describes an implementation of the H.332 multimedia conference systems.

• Journal of Digital Convergence
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• v.16 no.3
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• pp.1-12
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• 2018

The objective of this study is to explore the way to improve baby boom generation's ICT skills in their daily life. This study explores the effect of leisure activities on ICT skills. The analysis used 2016 Korea Media Panel data. Results show that the more leisure activities baby-boomers participate, the higher ICT skills they could get. The result of 2SLS regression also supports the leisure activities' effect on the improvement of ICT skills. More specifically, watching performing art such as movies, musicals, affects the improvement of the integrated ICT skills, and creative hobbies such as cooking, painting, affect the ability to use video contents and e-commerce; shopping affects the improvement of communication and information searching with a digital device. These findings suggest that leisure activities could improve ICT skills for baby boom generation who are familiar with face to face communication.

• Broadcasting and Media Magazine
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• v.18 no.3
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• pp.27-39
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• 2013

디스플레이 칩 상에 홀로그램을 표시할 때는 칩 자체의 화소 배열 구조에 의해 주어지는 회절 현상에 의해 표시되는 홀로그램의 재생상이 위치될 상 공간과 이 재생상을 볼 수 있는 시역이 정의된다. 그리고 상기 회절 현상뿐만 아니라 홀로그램 자체의 간섭무늬 패턴 구조에 의한 회절에 의해 생성된 회절 패턴이 상 공간 내에서 재생상과 중첩되어 나타나므로 이들은 잡음으로 주어진다. 이들 회절 패턴들은 칩 자체의 화소 구조 및 간섭무늬의 특성에 의해 주어지므로, 이들 칩이나 평판 표시패널의 고유한 것이어서 제거가 아주 어렵다. 그러므로 이들 칩들을 홀로그램 표시장치로 지속적인 사용을 위해서는 이들 문제의 해결이 필요하다.

• Smart Media Journal
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• v.11 no.10
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• pp.9-21
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• 2022

The recent expansion of the use of social media has served as an opportunity to express users' opinions in real time in various fields such as society, economy, politics, and culture, and brought many platforms that provide various information about companies. Among them, Glassdoor.com which started 2008 in US provides users with evaluations of the current and the former employees of their companies and also provides a outlooks for the company's growth Such a platform has the utility of providing necessary information to whom want to find a job or change jobs. In addition to this, variable studies have shown that the company information provided through these platforms is useful for investors as well. In this study, it was tested whether the corporate growth prospects of employees provided by Jobplanet, a platform with a typical function similar to Glassdoor.com in Korea, have predictive power to predict actual corporate growth. The forecast provided by Jobplanet and the company's financial indicator data received from FnGuide were collected and composed of panel data and analyzed using fixed effect model regression analysis. As a result, it was found that companies with positive prospects had higher employment growth than companies with negative prospects. When the outlook was neutral, the employment growth rate was higher than that of companies with a negative outlook.

• Journal of Digital Convergence
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• v.19 no.1
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• pp.11-22
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• 2021

The COVID-19 pandemic has led to distance learning in primary and secondary school. Little has been known whether home ICTs environment is appropriate for the distance learning. This paper aims to assess the current state of ICTs environment at home for the distance learning of children. Using 2012 and 2019 Korean Media Panel Survey, we investigated the number of smart devices owned by households and found differences in ownership by household characteristics. The results showed that the majority of household owned more than one smart devices per child. However, the difference in the proportion of households with less than one device per child varied depending on whether smartphone was included in smart devices. These results imply that public intervention is needed to prevent educational inequality caused by the home ICTs environment for the distance learning.

• Knowledge Management Research
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• v.24 no.4
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• pp.63-85
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• 2023

This study aims to identify the primary user group in the growing metaverse space based on the increased interest during the COVID-19 era. It also aims to explore the predictive factors for metaverse adoption. To predict online activities, the study examined user purposes, motivations, and relevant demographic factors as predictive variables through model analysis. The data from the Korean Media Panel Survey were used, and a two-stage analysis with the Heckman two-stage sample selection model was conducted to predict metaverse users. The analysis revealed that the key factors influencing metaverse adoption were offline activities, openness, OTT usage, and purchasing of paid content. Moreover, in the second stage model, openness, gender, and paid content purchases were identified as significant variables for increasing metaverse usage time. These results indicate that understanding metaverse users is essential in the context of the rising interest in online activities during the COVID-19 era and can provide valuable insights for metaverse platform-related companies and developers.