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Yuichi KUSAKABE, Yukiko IWASAKI, Yukihiro NISHIDA
Article type: Article
Session ID: 16-1
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We are currently researching a next-generation broadcasting system named "Super Hi-Vision", which has 16 times higher image resolution than that of a high definition television. Super Hi-Vision adopts the wide-gamut system colorimetry, which can reproduce vivid colors accurately. We have developed a wide-color-gamut Super Hi-Vision projector by using red, green, blue lasers corresponding to the wide-gamut colorimetry as the light sources.
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Yusuke MORIUCHI, Kanako SAITO, Toshimitsu KANEKO
Article type: Article
Session ID: 16-2
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We estimated the concentrations of melanin and hemoglobin and the surface asperity by analyzing the skin image taken with unknown camera under uncontrollable illumination. By controlling amount of melanin, we confirmed improvement of face image quality.
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Toshiaki KUBO, Naoyuki FUJIYAMA, Satoshi YAMANAKA, Narihiro MATOBA, Ko ...
Article type: Article
Session ID: 16-3
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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These day, it is common to improve motion blur on hold type displays by frame interpolation. In this paper, we propose a new frame interpolation method.
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Yoshikuni HIRANO, Katsu TANAKA, Yasushi MOTOYAMA, Nobuo SAITO, Naoki S ...
Article type: Article
Session ID: 16-4
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We have been investigating a directional light control method of light-emitting diodes (LEDs). We proposed a new method which makes it possible to control a principle axis through fine-structures on the LEDs. In this paper, we describe a layout design of structures to obtain a sharply defined principle axis.
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Tatsuya TAKEI, Yoshiki NAKAJIMA, Mitsuru Nakata, Genichi MOTOMURA, Hir ...
Article type: Article
Session ID: 16-5
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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An 8-inch VGA flexible AMOLED display driven by oxide-TFTs was successfully fabricated. Solution-processed polymer material was used as the passivation layer of the backplane. Furthermore, higher efficient and long lifetime phosphorescent materials were also used as the OLEDs. The fabricated flexible display showed clear color moving images.
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Hirohiko FUKAGAWA, Katsuyuki MORII, Yoichi ARIMOTO, Mitsuru NAKATA, Yo ...
Article type: Article
Session ID: 16-6
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
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We developed a highly efficient inverted OLED with high air stability. The EQE of the inverted OLED was improved above 15% by employing a suitable electron injection layer. No dark spot formation was observed after 250 days in the inverted OLED encapsulated by a barrier film with WVTR of 10^<-4> g/m^2/day.
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Takenobu USUI, Keiji ISHII, Hiroto SATO, Nobuo SAITO
Article type: Article
Session ID: 16-7
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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It is difficult to estimate Moving Picture Resolution (MPR) of Plasma Display Panels (PDP) in theory. Therefore we developed an MPR evaluation system for Super Hi-Vision (SHV) displays. We evaluated the MPR of an SHV PDP by newly developed system and confirmed it have good moving picture quality.
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Masaki SUGIE, Takayuki HIROI, Seiichi GOHSHI
Article type: Article
Session ID: 16-8
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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TVs with "Super-Resolution Image Reconstruction" have been commercialized. In this paper, we examine the image quality assessment by pair comparison method that used these TVs. From the results, we prove that the resolution of the TV with Super-Resolution Image Reconstruction is inferior to the TV without it.
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Chinatsu MORI, Keiko KUBOTA, Seiichi GOHSHI
Article type: Article
Session ID: 16-9
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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3D TV has become common. The stereoscopic effect of 3D TV is determined with the distance of two video cameras when the content was made. Although it is implicitly thought to be the same among all TV sets, it has not reported. According to our subjective assessment, the stereoscopic effect of 3D TV is not the same. It depends on TV sets. The assessment results are reported in this paper.
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Koutaro KUDO, Masanori TAKEMOTO, Daiki TAKIZAWA, Syutaro MATSUMOTO, Sa ...
Article type: Article
Session ID: 16-10
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We compared 3D image quality of the three different types of 3D televisions by the method of paired comparison. Three 3D video clips were used for evaluation. The results indicated that the lenticular glassless 3D television was the lowest total image quality. In two of three video clips, there were no significant differences between the polarized glasses and the active shutter glasses. Factors affecting subjective image quality of 3D televisions were discussed.
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Ryo Saekusa, Masanori Takemoto, Satoru Kubota, Ai Sasaki, Hiroshi Ishi ...
Article type: Article
Session ID: 16-11
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
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We evaluated the subjective readability of nine different Japanese fonts displayed on a high resolution LCD viewer. The participants consist of three different age groups. The results indicated that the dominant factors affecting the subjective readability of fonts were character's weight and size of kana characters. Age differences in the results were discussed.
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Hirohisa TAKESHITA, Yuuki HAGIYA, Seiichi GOHSHI
Article type: Article
Session ID: 16-12
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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Noise is an essential point to evaluate image quality and image quality is subjective assessments are only the only practical method to satisfy user's requirements. However subjective assessments for still images and noise has not been discussed. In this paper a subjective assessment with Degradation Category Rating method is proposed.
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Takaaki YAMADA
Article type: Article
Session ID: 17-1
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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Mutual interference caused by dual embedding would degrade the performance of both types of watermark. Frequency filtering is used to divide the content into two types of region. The emergable watermark is embedded in a plain large region with low spatial frequency while the invisible one is not. Use of this method should help deter illegal copying of videos
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Nobutoshi SUGAI, Yusuke KAMEDA, Ichiro MATSUDA, Susumu ITOH
Article type: Article
Session ID: 17-2
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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As an efficient way for archiving the existing video contents compressed by the old standard, we are developing a lossless re-encoding scheme for MPEG-1 video. In this paper, simplified probability models used for arithmetic coding of DCT coefficients are investigated to reduce computation time needed for our coding scheme.
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Riku TSUTO, Yusuke KAMEDA, Ichiro MATSUDA, Susumu ITOH
Article type: Article
Session ID: 17-3
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
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We previously proposed a new type of lossy image coding scheme whose compressed data can be losslessly converted into JPEG bitstreams. In this paper, perceptual image quality of our coding scheme is improved by taking account of spatial frequency characteristics of the human visual system. Results of our subjective quality assessment test demonstrate that perceptual quality of the reconstructed images is certainly improved.
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Kazuhisa IGUCHI, Atsuro ICHIGAYA, Yasuko SUGITO, Shun-ichi SEKIGUCHI, ...
Article type: Article
Session ID: 17-4
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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This report describes the subjective evaluation of the HEVC encoder for Hi-Vision. The encoder is developed for the purpose of communicating and reporting with limited bandwidth in case of a disaster. The subjective evaluation suggests that the image quality of developed HEVC encoder is approximately equal to the image quality coded by an AVC encoder for broadcasting, which is set to twice the level of the bitrates of HEVC.
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Naoki SAKAKIBARA, Syun Yamazaki, Yusuke KAMEDA, Ichiro MATSUDA, Susumu ...
Article type: Article
Session ID: 17-5
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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This paper proposes an efficient lossless coding method for color quantized images each of which consists of an array of indices and corrsponding RGB values of representative colors. In the conventional methods, predictive coding techniques developed for lossless image coding are often applied to the array of indices. On the other hand, our method directly predicts a 3D position of each index in a RGB color space to accurately estimate its occurrence probability.
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Masato Fuseya, Naoya Wada, Hitomi Murakami, Atsushi Koike
Article type: Article
Session ID: 17-6
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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This paper investigates Relationship of the position of watermark embedding and power distribution of digital watermarking method using DCT. We found that there is a correlation between detection accuracy and the position of watermark embedding corresponding to the power distribution of the image.
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Yusuke HIYAMA, Nobuyuki UMEZU
Article type: Article
Session ID: 17-7
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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JPEG format, one of most commonly used image compression methods, focuses only on similarities of pixels in the same block. We present a new method to re-compress JPEG images by using similarities in multiple blocks decoded until the step before inverse DCT.
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Kazuki ASAI, Nobuyuki UMEZU, Masatomo INUI
Article type: Article
Session ID: 17-8
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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Data compression by using the Discrete Wavelet Transform has a problem in that the errors caused by irreversible process. We propose an algorithm for limited error compression for CAD models. By using our method, the user can specify the maximum error before compressing the shape data.
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Takashi KOMATSU, Takahiro SAITO
Article type: Article
Session ID: 17-9
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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Authors previously proposed the noise removal method that used redundant DCT and the Color-Shrinkage. In our noise removal method using redundant DCT, plural numbers of noise removal results are obtained in the process. This paper shows that improvement can be obtained by replacing the previous average operation with the aggregation operation.
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Masaharu SATO, Tomonobu YOSHINO, Sei Naito
Article type: Article
Session ID: 17-10
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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Cross-dissolve technique is one of the typical video effects for the scene change. The existing video coding standard such as H.264/AVC and H.265/HEVC does not work well especially for the video effect scene. The reason is that such video scene may include two types of object motion corresponding to fade-in and fade-out video, and the mixed motion degrades the performance of motion compensated prediction. In order to improve the coding performance of the cross-dissolve scene, we propose a weighted prediction method that can predict fade-in video characteristics even while encoding fade-out pictures in order to improve the weighted prediction performance.
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Shingo Asakura, Kenichi Murayama, Takuya Shitomi, Kazuhiko Shibuya
Article type: Article
Session ID: 18-1
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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In dual polarized MIMO transmission, the difference in received power between horizontal and vertical polarizations is occurred because of the difference of transmission characteristics, and it makes the total bit error ratio characteristics deteriorated. It is confirmed that multi-dimensional interleaving scheme, that shuffles transmission data in inter-polarization and frequency simultaneously, improves the bit error ratio performance. This report describes results of the laboratory experiment conducted by using the prototype modulator and demodulator with multi-dimensional interleave function.
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Takayuki ITSUI, Hiroharu SAKATE, Ayako HARADA, Nobuaki MOTOYAMA, Yasuk ...
Article type: Article
Session ID: 18-2
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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While HEVC is said to be about twice as efficient as H.264/AVC, its encoding complexity has increased compared to H.264/AVC because of increase of the number of coding parameters. We have developed a real-time HEVC encoding algorithm and realized real-time SHV (Super Hi-Vision) encoding for HEVC.
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Atsuro ICHIGAYA, Yasuko SUGITO, Kazuhisa IGUCHI, Shin-ichi SAKAIDA, Hi ...
Article type: Article
Session ID: 18-3
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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This paper describes the quality analysis of "slice" and "tile" parallel processing for development of the SHV real-time HEVC encoder. By analyzing slice and tile, slice achieved better subjective quality and low complexity. We developed the SHV encoder with slice processing according to the results of analysis.
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Takuji SOENO, Yukihiro NISHIDA, Takayuki YAMASHITA, Yuichi Kusakabe, R ...
Article type: Article
Session ID: 18-4
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We have devised a new mapping method to transmit various formats of ultra-high definition television (UHDTV) signals including 120 frames per second (fps) into multi-link 10-Gbit/s stream, and developed an interface prototype using a parallel-fiber-optics transceiver with a capacity of 10-Gbit/s per channel.
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Shin HAMAGUCHI, Hidekazu IMATANI, Katsuichiro ISHIKAWA, Masanobu NISHI ...
Article type: Article
Session ID: 18-5
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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The system of contents delivery and synchronizing second screen contents with aired TV programs, which is currently examined by Multi-screen Broadcasting Study Group is introduced in this thesis. Group examined essential element which realize connected service with TV programs on second screen, and designed necessary user interface for smartphones.
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Masaru KUSABA, Sho TANAKA, Katsuichiro ISHIKAWA, Yoshihiro GODA, Hitos ...
Article type: Article
Session ID: 18-6
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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Multi-screen Broadcasting Study Group examines the broadcasting Service of synchronizing second screen contents with aired TV programs. In this paper, we propose an architecture in channel switching using IPDC-based Multi-screen broadcasting.
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Masahiro OTSUKA, Atsushi ONOUE, Kaori WADA, Naoto MAWATARI, Katsuichir ...
Article type: Article
Session ID: 18-7
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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On the examination in Multi-screen Broadcasting Study Group, it's necessary to develop the production system of second screen contents for realization Multiscreen Broadcasting service applied the IPDC. Especially at local TV stations, it's important to be able to produce contents by simple or automatic method.
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Hiroki SAKANASHI, Masaru KUSABA, Sho TANAKA
Article type: Article
Session ID: 18-8
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We have verified the IPDC using experimental broadcast waves. We measured the amount of transmission IPDC under some conditions. Also, in the broadcast wave only IPDC, we have a test for transmitting a TS file encoded from 4K video.
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Kohei KAWAKAMI, Joji URANO
Article type: Article
Session ID: 18-9
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
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We developed new content delivery system for digital signage using terrestrial broadcasting, which enables real-time content updates without the connection of the Internet. This paper describes an overview of the developed system and the result of the field test.
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Yuki HIRONAKA, Hisayuki OHMATA, Go OHTAKE, Kazuhiro OTSUKI, Masaru TAK ...
Article type: Article
Session ID: 18-10
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We developed a Hybridcast application distribution system with digital signature toward full-scale popularization of Hybridcast. By affixing an ID and a signature to each application, we can distribute them safely and securely to users. This paper describes details of the system focusing on application authentication scheme and revocation method used for the system.
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Chigusa YAMAMURA, Yusei NISHIMOTO, Arisa FUJII
Article type: Article
Session ID: 18-11
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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Access control technology for protecting digital multimedia content is consistently important. In this paper, we propose an authorization system based on OAuth2.0, which is able to control license transmission. We developed the proposed system and verified the applicability of our system to access control to CAS-protected content and DRM-protected content.
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So TANAKA, Satoshi NISHIMURA, Yosuke ENDO
Article type: Article
Session ID: 18-12
Published: August 28, 2013
Released on J-STAGE: May 24, 2017
CONFERENCE PROCEEDINGS
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We have developed a push content delivery technology for realizing services of integrating broadcasting with the Internet. In order to provide services with high synchronization between the broadcast programs and the push contents, it should be considered how to deliver each data to all clients at the same timing under the condition that clients' transmission delay are individually different. In this report, we propose a new push content delivery method which controls content output timing by considering clients' RTT.
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