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Ito T.,Japan Broadcasting Corporation NHK
2010 IEEE Asian Solid-State Circuits Conference, A-SSCC 2010

NHK is conducting research on two future television themes: Super Hi-Vision and Integral 3DTV. In the talk, these two television systems will be introduced and their impacts on the semiconductor industry will be discussed. We consider Super Hi-Vision as the ultimate 2-dimensional television system. It is designed to be viewed with 100 degrees of visual angle to provide viewers with a sensation of reality and immersion as if they were present at the site of the video scene. This super-realistic television system requires sixteen times more resolution than the current Hi-Vision system. In the talk, the specifications of Super Hi-Vision are explained and a roadmap toward the introduction of Super Hi-Vision for the home will be shown. Research on Integral 3DTV will also be introduced as a post-Super-Hi-Vision candidate system. In the talk, the capabilities of this system and current status of research will be discussed along with expected breakthroughs. ©2010 IEEE. Source

Emoto M.,Japan Broadcasting Corporation NHK
IEEE/OSA Journal of Display Technology

A short, but finite, exposure aperture time is necessary for an imager to photoelectrically accumulate converted electrons in a temporal sample. As the output is the electrical signal averaged over the exposure time, motion blur in images of moving objects can occur. In current assessments of the quality of television images, the observer's static visual acuity (SVA) must be screened before the subjective evaluation. However, in the subjective evaluation of moving image sharpness, an observer's evaluation may not be correlated with their SVA but instead with their dynamic visual acuity (DVA). In the present work, we show that the evaluation of moving-picture sharpness was not correlated with SVA but instead with DVA for a visual target with a spatial frequency corresponding to a decimal-scale SVA of 0.8 (DVA 0.8). Our results show that viewers with good DVA tend to provide a harsher assessment (i.e., a lower score) of the sharpness of images of moving objects, suggesting that DVA screening is essential before assessment of the sharpness of television images. We also propose an SVA screening threshold value of 0.8, because the maximum DVA is almost equal to SVA when the viewed object is not in motion. © 2005-2012 IEEE. Source

Fukagawa H.,Japan Broadcasting Corporation NHK
Journal of the Vacuum Society of Japan

Highly efficient and stable phosphorescent organic-light emitting diodes (PHOLEDs) were demonstrated in view of optimization of emitting and/or carrier transporting materials. The device characteristics of the red PHOLED was improved by selecting a host material, which surrounds the phosphorescent dopant. The host/dopant combination was found to be a crucial factor in obtaining high efficiency and stability in the PHOLEDs. On the other hand, the novel hole-transporting materials were synthesized to improve the efficiency and operational stability of green PHOLEDs. The optimized red and green OLEDs exhibit a maximum external quantum efficiency of about 20% and an expected half lifetime of over 10,000 h with an initial luminance of 1,000 cd/m2. Source

Obata I.,Japan Broadcasting Corporation NHK
Digital Television Tape Recording and Other New Developments: 20th Annual SMPTE Television Conference

Japan Broadcasting Corporation (NHK) has fourty local stations. In the local stations, many programs, such as infomation, sports, amusement etc., are made with VTRs. © 1986 Society of Motion Picture and Television Engineers, Inc. Source

Emoto M.,Japan Broadcasting Corporation NHK | Sugawara M.,Japan Broadcasting Corporation NHK
IEEE/OSA Journal of Display Technology

The use of bright and wide field-of-view (FOV) displays in future TV systems will enable us to enjoy TV programs with a rich sense of presence, i.e., a sense of "being there." However, such displays can strongly stimulate human peripheral vision, which is sensitive to flicker. The recent widespread adoption of hold-type displays such as liquid crystal displays might circumvent the flicker problem in current TV systems. For temporal specification of future TV systems with bright and wide FOV displays, we measured the critical fusion frequency (CFF) in 26 participants, using varying luminance, duty ratios, and FOVs. We showed that CFF depended on the duty ratio and the FOV, and that more than 90 Hz was required to avoid flicker perception with wide FOV displays. Moreover, we demonstrated that flicker was regularly perceived in viewing wide FOV natural images presented at 60 Hz with a 50% duty ratio. © 2012 IEEE. Source

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