02이주영_ok.hwp
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1 (JBE Vol. 19, No. 2, March 2014) (Special Paper) 19 2, (JBE Vol. 19, No. 2, March 2014) ISSN (Online) ISSN (Print) 3DTV a), a), a), a), b), b), a) Quality Verification of Fixed and Mobile Hybrid 3DTV Services via a Subjective Test of Mixed-resolution Stereoscopic Videos Jooyoung Lee a), Sung-Hoon Kim a), Seyoon Jeong a), Jin Soo Choi a), Dong-Wook Kang b), Kyeong-Hoon Jung b), and Jinwoong Kim a) 3D,. 3D.,.,. 3DTV 3D. Abstract Various techniques have been developed for efficient compression of stereoscopic 3D videos. Mixed-resolution based approach is one representative bit-rate saving method based on the characteristics of human visual system that the mixed-resolution stereoscopic videos are perceived close to the higher resolution. However, when the difference between the left and right image resolutions is bigger than a certain threshold level, it causes the perceived quality degradation of the 3D images. Subsequently, several researches tried to find the correlation between the difference in resolution and the level of the perceived quality degradation, but they conducted the experiments just considering the difference in resolution without considering the viewing distances, so thereby different results were retrieved from test to test. In this work, we calculated the optimal viewing distance based on the human visual system, and conducted the subjective tests with the calculated viewing distance. With the results, we demonstrate that the fixed and mobile hybrid 3DTV, which is based on mixed-resolution stereoscopic images, can provide the high quality 3D services. Keyword : 3DTV, ATSC, mixed-resolution stereo video, stereo video compression
2 6 : 3DTV (Jooyoung Lee et al. : Quality Verrification of Fixed and Mobile Hybrid 3DTV Services via a Subjective Test of Mixed-resolution Stereoscopic Videos). 3D 3D, 3DTV. HEVC [1], MVC (Multiview Video Coding) [2]. 3D [3]. 3D. (Binocu- lar Rivalry Suppression) [4]., 3D. 3D.. HD,. a) (Broadcasting & Telecommunications Media Research Laboratory, ETRI) b) (School of Electrical Engineering, Kookmin University) Corresponding Author : (Jinwoong Kim) jwkim@etri.re.kr Tel: (ICT) Manuscript received January 13, 2014 Revised March 10, 2014 Accepted March 19, DTV. 3, 4.. 3DTV 3DTV 3D, 2D, 6MHz [5]. 6MHz 19.39Mbps, 6MHz 2D. 3DTV,. 3D, 2D 3D 2D. 3DTV 1 2D, 3DTV. 3DTV ATSC A/53 [6] A/153 [7], 2D. ATSC 3DTV
3 (JBE Vol. 19, No. 2, March 2014) 1. 3DTV Fig. 1. Concept of fixed and mobile hybrid 3DTV broadcast system, A/104 Part 5 Candidate Standard DTV HD SD 3D. (Binocular Rivalry Suppression),. 3DTV 3DTV.
4 6 : 3DTV (Jooyoung Lee et al. : Quality Verrification of Fixed and Mobile Hybrid 3DTV Services via a Subjective Test of Mixed-resolution Stereoscopic Videos) 3D [8]. 3D [8][9][10],. [8], [9], [10], H, 4H, 3.3H. 4H [9] 1/4 ( ), H [8] 1/4.,.,.., 3D. 1. ITU-R BT.500 [11] ITU-T P.910 [12],. [8],[9],[10] H, 4H, 3.3H, Fig. 2. Illustration of optimal viewing distance for the subjective quality assessment
5 (JBE Vol. 19, No. 2, March 2014),.. 2. min tan tan (1). (1),. 1.0 ( 20/20 6/6 ) [14][15], (arcminute; 1/60) [13]. 1,. (1) PW PH DHS DVS. (1), tan(1/60). (1) 3. (55, HD ) Fig. 3. Examples of the image resolution and the display size for the calculation of optimum viewing distance, Table 1. Examples of optimal viewing distance according to display sizes and image resolutions (inch cm) (cm) (pixels) (cm)
![5와 같이 다양한 공간 및 시간 인지 정보의 영상을 사용하였다. 화질 평가에서 네 시퀀스의 [12] 그림 5.](/docs-images/87/95679775/images/6-3.jpg "테스트 시퀀스의 시간 및 공간 인지 정보 Fig. 5.")
6 이주영 외 인 혼합 해상도 양안식 영상에 대한 주관적 화질평가를 통한 고정 및 이동 융합형 서비스의 품질 검증 6 : 3DTV (Jooyoung Lee et al. : Quality Verrification of Fixed and Mobile Hybrid 3DTV Services via a Subjective Test of Mixed-resolution Stereoscopic Videos) 153 인 경우의 식(1)에 대한 입력 파라미터를 도식화한 것이다. 표 1 은 식 (1)에 따라 계산된 디스플레이 사이즈 및 영상 해상도에 따른 최적 시청거리 예를 나타낸 것이다. HD(1920x1080) 2. 실험 환경 실험을 위해 그림 4와 같이 네 개의 테스트 시퀀스( Band, BMX, Musicians, Poker )를 이용하였다. 테스트 시퀀 스는 표 2와 같이 1920x1080 사이즈로 구성되었으며, 10초 짜리 영상 하나와 8초짜리 영상 셋으로 구성되었다. 각 시 퀀스의 프레임레이트는 fps였다. 영상의 특성을 확인 하기 위해 ITU-T P.910 권고안 에 따라 영상의 공간 인지 정보(SI; Spatial perceptual information)과 시간 인지 정보 (TI; Temporal perceptual information) 값을 계산하였으며, 권고안에 따라 그림 5와 같이 다양한 공간 및 시간 인지 정보의 영상을 사용하였다. 화질 평가에서 네 시퀀스의 [12] 그림 5. 테스트 시퀀스의 시간 및 공간 인지 정보 Fig. 5. Temporal and spatial perceptual information of the test sequences 좌영상은 1920x1080 해상도의 원영상을 사용하였으며, 우 영상은 830x480, 640x368, 416x240 세 가지 해상도 (이하 (a) Band (b) BMX (c) Musicians (d) Poker 그림 4. 주관적 화질평가용 테스트 시퀀스 스냅샷 Fig. 4. Snapshots of the test sequences for the subjective quality assessment
7 (JBE Vol. 19, No. 2, March 2014) 2. Table 2. Test sequence information SI (Spatial perceptual Info.) TI (Temporal perceptual Info.) Band 1920 x s BMX 1920 x1080 8s Musicians 1920 x1080 8s Poker 1920 x1080 8s p, 360p, 240p). ATSC A/ LG 3D (55LM9600), (1) 218Cm (3.18H). DSIS (Double Stimulus Impairment Scaling) [11],. DSIS,. 23, , 3, MOS (Mean Opinion Score) 95% p. 480p re S c o 2.5 O M Band BMX Musicians Poker 6. Fig. 6. Test results of the quality assessment. 360p, 360p. 360p MOS p. SI Musicians Poker, SI Band BMX. TI BMX 240p Ref
8 6 : 3DTV (Jooyoung Lee et al. : Quality Verrification of Fixed and Mobile Hybrid 3DTV Services via a Subjective Test of Mixed-resolution Stereoscopic Videos)..,,. HD 480p 3D HD 3D 3D., HD 240p..,. HD,, 3DTV., HD 480p, 240P. 3DTV 360p 480p 3DTV, 3DTV. (References) [1] S. Cho, S. Jeong, E. Lee, J. Choi, J. Kim, "A terrestrial stereoscopic 3DTV broadcasting system based on high efficiency video coding", Telecommunications Review, vol. 21, no. 4, pp.554~570, 2011 [2] A. Vetro, T. Wiegand and G. J. Sullivan "Overview of the stereo and multivew video coding extensions of the H.264/MPEG-4 AVC standard", Proc. IEEE, vol. 99, pp [3] L. Zhang and W. Tam "Stereoscopic image generation based on depth images for 3D TV", IEEE Trans. Broadcasting, vol. 51, no. 2, pp [4] H. Asher, "Suppression theory of binocular vision," Brit. J. Ophtamology, vol. 37, pp , [5] J. Lee, S. Kim, S. Jeong, J. Choi, J. Kim, Bandwidth-efficient stereoscopic 3D broadcasting system utilizing mobile broadcast network, ICT Convergence 2013 Conf., Jeju, to be published. [6] ATSC digital television standard, ATSC standard A/53, Aug [7] ATSC Mobile DTV standard, ATSC standard A/153, Oct [8] P. Aflaki, M. Hannuksela, M. Gabbouj, "Subjective quality assessment of asymmetric stereoscopic 3D video," Signal, Image and Video Processing, DOI: /s , Mar [9] L. Stelmach, W. J. Tam, D. Meegan and A. Vincent "Stereo image quality: Effects of mixed spatiotemporal resolution," IEEE Trans. Circuits Syst. Video Technol., vol. 10, no. 2, pp [10] B. Kim et al., "A study on feasibility of dual-channel 3DTV service via ATSC-M/H," ETRI Journal, vol. 34, no. 1, pp , Feb [11] Methodology for the subjective assessment of the quality of television pictures, ITU-R Recommendation BT , [12] Subjective video quality assessment methods for multimedia applications, ITU-T Recommendation P.910, [13] H. Kolb, E. Fernandez, and R. Nelson, Webvision : the organization of the retina and visual system, [Online]. Available: med. utah.edu/, [14] EyeCare Associates of East Texas, What does 20/20 vision mean?, [Online]. Available: [15] Wikipedia, Snellen chart, [Online]. Available: org/wiki/snellen_chart
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1. 3DTV Fig. 1. Tentative terrestrial 3DTV broadcasting system. 3D 3DTV. 3DTV ATSC (Advanced Television Sys- tems Committee), 18Mbps [1]. 2D TV (High
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Journal of the Korea Academia-Industrial cooperation Society Vol. 15, No. 2 pp. 1051-1058, 2014 http://dx.doi.org/10.5762/kais.2014.15.2.1051 멤리스터의 전기적 특성 분석을 위한 PSPICE 회로 해석 김부강 1, 박호종 2, 박용수 3, 송한정 1*
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Performance Optimization of SCTP in Wireless Internet Environments The existing works on Stream Control Transmission Protocol (SCTP) was focused on the fixed network environment. However, the number of
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그림 2. 최근 출시된 스마트폰의 최대 확장 가능한 내장 및 외장 메모리 용량 원한다. 예전의 피쳐폰에 비해 대용량 메모리를 채택하고 있지 만, 아직 데스크톱 컴퓨터 에 비하면 턱없이 부족한 용량이다. 또한, 대용량 외장 메모리는 그 비용이 비싼 편이다. 그러므로 기존
스마트폰을 위한 A/V 신호처리기술 편집위원 : 김홍국 (광주과학기술원) 스마트폰을 위한 동영상 압축 기술 호요성, 최정아 광주과학기술원 요 약 스마트폰이 대중화되면서 이동통신 시장은 일대 혁신을 맞이 했다. 최근 출시되는 스마트폰이 크고 선명한 화면과 빠른 프로 세서를 잇따라 탑재하면서 고해상도 및 고품질 영상에 대한 사 용자들의 수요가 급증하고 있다. 하지만
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시청공간을 넘어 새롭게 소통하기 - 인터넷 기반의 를 중심으로 - New Communication beyond Viewing Space - Focused on Social Television based on Internet - 주저자 오종서 Oh, Jongsir 동서대학교 방송영상전공 조교수 Assistant Professor of Dongseo University
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DBPIA-NURIMEDIA
Journal of the Korea Institute of Information and Communication Engineering 한국정보통신학회논문지(J. Korea Inst. Inf. Commun. Eng.) Vol. 19, No. 5 : 1031~1039 May. 2015 정보보호 산업의 경제적 파급효과 및 기여도 분석 김방룡 1 홍재표 2* Economic