A Study on Correlation among Viewers by Medium based on KBS PIE-TV Index

이종수,Hamacher Alaric Carl,권순철,이승현 한국인터넷방송통신학회 2017 Journal of Advanced Smart Convergence Vol.6 No.4

In order to respond to the ever-changing media environments in the era of smart and mobile technology, KBS has introduced and partially applied PIE-TV and PIE-nonTV modes that monitor the average number of viewers among the national population group by means of the sample household extraction method which is a traditional way of rating investigation. This study analyzes the correlation between the number of viewers of premiere, re-air broadcasting, and MPP channel programs and the number of OTT-based VOD viewers in reference to the data extracted from PIE-TV survey results. KBS conducted a survey for 3 months between June and August 2017 to measure the PIE-TV Index, based on which the above-mentioned correlation was analyzed with programs classified to entertainment, drama, and cultural programs. For data analysis, SPSS (Ver. 18.0 for Window, SPSS Inc, Chicago, IL, USA) was utilized. It was assumed that when p<0.05 in the confidence interval of 95%, statistically significance would be secured. Among the 30 subjects in the simple correlation analysis, the parameter was determined by the Person correlation coefficient and the non-parameter by the Spearman correlation coefficient. Analysis results are as below: ① As the number of viewers of premier entertainment, drama, and cultural programs was larger, the number of VOD viewers was larger accordingly. ② As for entertainment and drama programs, as the number of re-air broadcasting viewers was larger, the number of VOD viewers decreased accordingly. ② As for entertainment and drama programs, as the number of MPP viewers was larger, the number of VOD viewers decreased accordingly. It is expected that this statistical data can be utilized for strategic planning of MPP channel lineups including terrestrial TV broadcasting, cable TV, etc.

System Integration for the Operation of Unmanned Audio Center based on AoIP

이재호,Hamacher Alaric Carl,권순철,이승현 한국인터넷방송통신학회 2017 Journal of Advanced Smart Convergence Vol.6 No.2

Recently, the development of the information communication industry has made many changes in the industrial acoustic industry. Especially, it has a great influence on the change of system and equipment of acoustic system. Analog equipment is changing to digital equipment, and integrated control equipment makes it easier to operate and manage the sound system. However, the integrated control system currently on the market is only controllable for some devices. In this paper, we propose a new AoIP - based system configuration method, which enables the operation status monitoring, unmanned operation and self - diagnosis of equipment. As a result of the study, it is confirmed that the proposed system can be operated, monitored, and self - diagnosed at remote sites. It is expected that an AoIP- based sound system will be the industry standard in the future.

A Study on the Quality of Photometric Scanning Under Variable Illumination Conditions

전형준,Jahanzeb Hafeez,Hamacher Alaric Carl,이승현,권순철 한국인터넷방송통신학회 2017 Journal of Advanced Smart Convergence Vol.6 No.4

The conventional scan methods are based on a laser scanner and a depth camera, which requires high cost and complicated post-processing. Whereas in photometric scanning method, the 3D modeling data is acquired through multi-view images. This is advantageous compared to the other methods. The quality of a photometric 3D model depends on the environmental conditions or the object characteristics, but the quality is lower as compared to other methods. Therefore, various methods for improving the quality of photometric scanning are being studied. In this paper, we aim to investigate the effect of illumination conditions on the quality of photometric scanning data. To do this, 'Moai' statue is 3D printed with a size of 600 (H) × 1,000 (V) × 600 (D). The printed object is photographed under the hard light and soft light environments. We obtained the modeling data by photometric scanning method and compared it with the ground truth of 'Moai'. The 'Point-to-Point' method used to analyseanalyze the modeling data using open source tool 'CloudCompare'. As a result of comparison, it is confirmed that the standard deviation value of the 3D model generated under the soft light is 0.090686 and the standard deviation value of the 3D model generated under the hard light is 0.039954. This proves that the higher quality 3D modeling data can be obtained in a hard light environment. The results of this paper are expected to be applied for the acquisition of high-quality data.

3D TV 근거리 시청에 따른 사위도와 조절성폭주비 평가

손정식,김동수,김정호,김재도,Hamacher Alaric Carl,유동식 한국안광학회 2015 한국안광학회지 Vol.20 No.3

Purpose: This study was designed to evaluate the changes of phoria and calculated AC/A ratio, and their recovery time points by watching 3D television (3D TV). Methods: 50 subjects (male 30, female 20) of 20s to 40s ages who can watch 3D, were measured phoria using a Howell phoria card at 3 m for distance and 40 cm for near. The phoria was evaluated before watching 3D TV and every 10 minutes from starting of watching 3D TV for 30 minutes, and every 5 minutes after finishing of watching 3D TV for 30 minutes again. Results: For the distance phoria during and after watching 3D TV, it was increased to more exophoria −0.98±1.37 Δ (prism diopters) after 10 minutes from starting of 3D TV watching (p=0.063) and increased to more exophoria −1.00± 1.28 Δ after 30 minutes (p=0.024), and started to decrease after finishing of watching 3D TV and recovered to the level of before 3D TV watching (−0.78±1.11 Δ) after 20 minutes (p=0.32) with comparing to phoria of before watching 3D TV (−0.80±1.12 Δ). For the near phoria, it was also increased to more exophoria −5.71±4.45 Δ after 10 minutes from starting of watching 3D TV (p=0.000) and −6.58±4.36 Δ after 30 minutes (p=0.000), and started to decrease after finishing of watching 3D TV and recovered to the level of before watching 3D TV after 20 minutes (−4.34±3.67 Δ) (p=0.32) with comparing to the phoria of before watching 3D TV (−4.36±3.66 Δ). AC/A ratio was decreased from 4.92±1.17 Δ/D for before 3D TV watching to 4.11±1.50 Δ/D for after 30 minutes from starting of watching 3D TV (p=0.000), and increased after the end of watching 3D TV and recovered to the level of before 3D TV watching (4.93±1.18 Δ/D) after 25 minutes (p=0.598). Conclusions: During watching 3D TV at near, it showed a tendency of convergence insufficiency by decrease of calculated AC/A ratio as result that exophoria at near was higher increased than exophoria at distance. However, the increased exophoria at both near and distance was recovered to the level of base line after 25 minutes from the end of watching 3D TV. Through this study, it seems to need rational proposals of advice for watching 3D TV. 목적: 3D TV의 근거리 시청에 따른 사위와 조절성폭주비의 변화와 회복 시점을 평가하고자 하였다. 방법: 3D TV 시청이 가능한 20~40대의 50명(남 30명, 여 20명)을 대상으로 하웰(Howell) 사위 카드를 사용하여 원거리(3 m)와근거리(40 cm)에서 사위도를 측정하였다. 시청 거리는 1 m이며 시청 전, 시청 시간 30분 동안 10분 간격으로, 시청이후 30분 동안 5분 간격으로 사위도를 측정하였다. 결과: 3D 영상 시청의 원거리 사위도 변화는 3D영상 시청 전−0.80±1.12 Δ과 비교하여 10분, 30분 후 각각 −0.98±1.37 Δ(p=0.063), −1.00±1.28 Δ(p=0.024)로 외사위 경향으로증가하였으며, 영상 시청 종료 후에는 외사위도가 감소하기 시작하여 20분 이후에는 −0.78±1.11 Δ로 시청 전 사위도 수준으로 회복되었다(p=0.322). 근거리 사위도 역시 영상 시청 전 −4.36±3.66 Δ과 비교하여 10분, 30분 후 각각 −5.71±4.45 Δ(p=0.000)과 −6.58±4.63 Δ(p=0.000)으로 외사위 방향으로 증가하였으며, 영상 시청 종료 후에는외사위도가 감소하기 시작하여 25분 이후에는 −4.34±3.67 Δ로 시청 전 사위도 수준으로 회복되었다(p=0.322). 조절성폭주비는 영상 시청 전 4.92±1.17 Δ/D과 비교하여 영상시청 30분 후 4.11±1.50 Δ/D로 낮아졌으며(p=0.000), 영상 시청 종료 후에는 증가하기 시작하여 25분 후 4.93±1.18 Δ/D으로 시청 전으로 회복되었다(p=0.598). 결론: 근거리 3D TV 시청 시에 원거리보다 근거리의 외사위도가 더 크게 증가하였으며, 이로 인해 조절성폭주비는 낮아져폭주부족의 경향을 보였다. 그러나 시청 후 25분 후에는 증가된 원거리와 근거리의 외사위도 모두 시청 전의 상태로 회복되었다. 따라서 3D TV 시청에 관한 합리적인 시청 권고안을 제시할 필요가 있는 것으로 본다.