NHK Engineering Services Inc.

Nishi-Tokyo-shi, Japan

NHK Engineering Services Inc.

Nishi-Tokyo-shi, Japan
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Okano F.,NHK Engineering Services Inc. | Kanazawa M.,NHK Engineering Services Inc. | Kusakabe Y.,NHK Engineering Services Inc. | Furuya M.,JVC | Uchiyama Y.,JVC
IEEE Transactions on Broadcasting | Year: 2012

We propose a new scanning method which is comparable to progressive scanning. The method improves the resolution of video equipment with GRB three elements. We position both red (R) and blue (B) pixels diagonally offset at a half the pixel pitch from green (G) pixels, and alternating the position of G pixels and both the position of R and B pixels for each field. The Nyquist frequency in both horizontal and vertical directions of the video equipment is doubled compared to that of each field. The method also eliminates artifacts caused by interlace scanning. © 2012 IEEE.

Kikuchi K.,NHK Science and Technical Research Laboratories | Ohkawa Y.,NHK Science and Technical Research Laboratories | Miyakawa K.,NHK Engineering Services Inc. | Matsubara T.,NHK Science and Technical Research Laboratories | And 3 more authors.
Physica Status Solidi (C) Current Topics in Solid State Physics | Year: 2011

HARP photoconductive film made of amorphous selenium (a-Se), which makes use of the avalanche multiplication phenomenon, has been developed for the ultrahigh-sensitivity television cameras that are used to report breaking news at night or to produce nature and science programs. We have tried to reveal the hole-blocking mechanism in HARP films in the present work to improve their characteristics. It is important to reduce the dark current in HARP film to improve its sensitivity. HARP film has a hole-blocking layer to suppress dark current, which interrupts the injection of holes to the a-Se layer. Hole injection is considered one of the main factors related to dark current. The hole-blocking layer consists of cerium dioxide (CeO2), which is an n-type wide-gap material. We have recently succeeded in producing improved CeO2 whose hole-blocking capabilities are superior to the abilities of conventional normal CeO2. This paper describes the hole-blocking mechanism in HARP film. To investigate this, the relationship between dark current and the film thickness of the CeO2 layer were measured with each HARP film using the two different types of CeO2. Furthermore, we analyzed the Ce 3d core-level photoemission spectra for both types of CeO2 layers in HARP film by using hard X-ray photoelectron spectroscopy (HAX-PES) at Spring-8. As a result, we found that the hole-blocking capabilities of the film could be improved by reducing the number of defect levels generated from oxygen vacancies in the CeO2 hole-blocking layer. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Okano F.,NHK Engineering Services Inc. | Shishikui Y.,Science and Technology Research Laboratories
Proceedings of the IEEE | Year: 2012

Many engineers and researchers contributed towards the development of television since the successful experiments conducted by John Baird in the United Kingdom and Kenjiro Takayanagi in Japan in the 1920s. The research and development of television systems continued over the years culminating in the standardization of the NTSC, PAL, and SECAM formats as standard definition television (SDTV) systems. The motion picture, which was invented by the Lumiere brothers in 1895, has progressed dramatically since the invention of the television. It is now becoming possible to fabricate semiconductor devices, which form the basis of elemental technologies essential to video systems, at a submicrometer level of precision. If a new video system can be constructed exceeding the capabilities of HDTV, certainly it would bring many benefits in a wide range of fields. Science and Technology Research Laboratories has taken up the challenge of developing UHDTV as the system beyond HDTV, and it is called Super Hi-Vision.

Kanazawa M.,NHK Engineering Services Inc.
Proceedings of the International Display Workshops | Year: 2012

The relationship of the luminance and the color gamut for reflective type displays is investigated. It is shown that methods based on the human visual system other than the current RGB sub-pixel can have better luminance and color gamut.

Arai J.,NHK Japan Broadcasting Corporation | Kawakita M.,NHK Japan Broadcasting Corporation | Yamashita T.,NHK Japan Broadcasting Corporation | Sasaki H.,NHK Japan Broadcasting Corporation | And 4 more authors.
Optics Express | Year: 2013

Integral three-dimensional (3D) television based on integral imaging requires huge amounts of information. Previously, we constructed an Integral 3D television using Super Hi-Vision (SHV) technology, with 7680 pixels horizontally and 4320 pixels vertically. We report on improved image quality through the development of video system with an equivalent of 8000 scan lines for use with Integral 3D television. We conducted experiments to evaluate the resolution of 3D images using an experimental setup and were able to show that by using the pixel-offset method we have eliminated aliasing produced by full-resolution SHV video equipment. We confirmed that the application of the pixel-offset method to integral 3D television is effective in increasing the resolution of reconstructed images. © 2013 Optical Society of America.

Arai J.,NHK Japan Broadcasting Corporation | Yamashita T.,NHK Japan Broadcasting Corporation | Miura M.,NHK Japan Broadcasting Corporation | Hiura H.,NHK Japan Broadcasting Corporation | And 3 more authors.
Optics Letters | Year: 2013

We have developed a compact integral three-dimensional (3D) imaging equipment that positions the lens array and image sensor in close proximity to each other. In the conventional scheme, a camera lens is used to project the elemental images generated by the lens array onto the image sensor. In contrast, the imaging equipment presented here combines the lens array and image sensor into one unit and makes no use of a camera lens. This scheme eliminates the resolution deterioration and distortion caused by the use of a camera lens and improves, in principle, the quality of the reconstructed 3D image. We captured objects with this imaging equipment and displayed the reconstructed 3D images using display equipment consisting of a liquid crystal panel and a lens array. The reconstructed 3D images were found to have appropriate motion parallax. © 2013 Optical Society of America.

Miura M.,Japan Broadcasting Corporation NHK | Arai J.,Japan Broadcasting Corporation NHK | Mishina T.,Japan Broadcasting Corporation NHK | Okui M.,Japan Broadcasting Corporation NHK | Okano F.,NHK Engineering Services Inc.
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2012

We developed a three-dimensional (3-D) imaging system with an enlarged horizontal viewing angle for integral imaging that uses our previously proposed method for controlling the ratio of the horizontal to vertical viewing angles by tilting the lens array used in a conventional integral imaging system. This ratio depends on the tilt angle of the lens array. We conducted an experiment to capture and display 3-D images and confirmed the validity of the proposed system. © 2012 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).

Narita N.,Japan Broadcasting Corporation | Kanazawa M.,NHK Engineering Services Inc.
IEEE Transactions on Broadcasting | Year: 2013

We analyze the psychological factors of high-sensation-of-reality sequences for the HDTV and stereoscopic (3-D) HDTV. We discuss the applicability of a 1-D quality grading scale, which is used in the evaluation of picture quality, to the evaluation of their overall impressions. First, HDTV and 3-D HDTV sequences were analyzed with the semantic differential technique and factor analysis. Eight psychological factors were obtained separately for each television, and it was confirmed that naturalness extracted from the 3-D HDTV sequences was closely related to the disparity. Next, we examine whether the relationship between the opinion scores obtained using a seven-grade quality scale and the factor scores could be represented by multiple regression models. Consequently, the regression model was found to be applicable to scores for the HDTV sequences and inapplicable to those for the 3-D HDTV ones. The factor scores for naturalness (sense of naturalness) obtained from the 3-D HDTV sequences were found to have strong negative correlations with the disparities between sequences for right- and left-channels. Copyright © 1963-12012 IEEE.

Kanazawa M.,NHK Engineering Services Inc. | Kusakabe Y.,Advanced Research Corp.
Proceedings of the IEEE | Year: 2013

Japan Broadcasting Corporation (NHK) promotes research and development of Super Hi-Vision (SHV), an ultrahigh-definition TV system with 16 times the number of pixels of HDTV and with a 22.2 multichannel sound system. So far, three types of SHV displays have been developed, using liquid-crystal-on-silicon (LCOS) projection technologies. The three types are the pixel-offset method, the dual-modulation method, and the three-panel type. Development of these displays is described in detail in this paper. © 2012 IEEE.

NHK Engineering Services Inc. | Date: 2012-08-28

Photographic machines and apparatus, namely, Cameras; Cinematographic machines and apparatus; Optical apparatus and instruments, namely, Telescopes, Periscopes, Binoculars, Microscopes, Magnifying glasses; Electric wires and cables; Telecommunications devices and apparatus, namely, Telephone apparatus, Mobile phones, Facsimile machines, Audio frequency transmitters, Relays for radio and TV stations; Television receivers, TV sets, Television transmitters, Radio receivers, Radio transmitters, wireless communication device featuring voice, data and image transmission, Navigation apparatus for vehicles on-board computers, Public-address systems and instruments, Compact disk players, Tape recorders, Electric phonographs, Record players, Sound recording machines and apparatus, Digital cameras, Video cameras, camcorders, Video disk players, Videotape recorders, DVD players, DVD recorders; Parts and accessories for telecommunication machines and apparatus, namely, Antennas, aerials, Cabinets for telecommunication apparatus, Magnetic tape erasers, Magnetic tape cleaners, Magnetic head erasers, Magnetic head cleaners apparatus, Loudspeakers, Connectors for telecommunication apparatus, Blank magnetic tapes for tape recorders, Blank video tapes, Headphones, Microphones; Electronic machines apparatus and their parts, namely, Computers and computer peripheral devices, Thermistors, Central processing units, Diodes, Transistors, Disk drives for computers, Word processors, Shield cases for magnetic disks, Integrated circuits, Large scale integrated circuits, Electrostatic copying machines, Electron tubes, Computer programs for editing images, sound and video, Computer programs for document management, Computer programs for using the internet and the world wide web, Electronic desk calculators; Phonograph records featuring music; Electronic circuits; Pre-recorded CDs, video tapes, laser disks and DVDs featuring music and images; Downloadable ring tones via the internet and wireless devices; Downloadable music via the internet and wireless devices; Downloadable electronic games via the internet and wireless devices; Exposed cinematographic films; Exposed slide films; Slide film mounts; Downloadable image files containing artwork; text, audio, video, games, and Internet Web links relating to sporting and cultural activities; Downloadable electronic publications in the nature of books, magazines, and newspapers featuring news, sheet music, cartoon strips, games, and images. Telecommunication services, namely, Mobile telephone communication, Electronic bulletin board services, Electronic mail, Communications by computer terminals, Communications by fiber optic networks, Facsimile transmission; Broadcast communication services, namely, Television broadcasting, Cable television broadcasting, Radio broadcasting; Wire services, namely, the transmission of news items to news reporting organizations.

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