Digital broadcasting has spread, but radio disturbance occur. We have steadily observed UHF radio waves in Tsubata, and the radio waves are received from Matsue city. Therefore, we researched the relations between the wave from Matsue city and the height distribution of the refractive index of tropospheric air.

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In OFDM, one of the issues is the influence of the impulsive noise in the channel. In the compensation of impulsive noise, it is necessary to estimate the channel. In conventional channel estimation scheme has low performance of time domain and it is issue that estimation accuracy in time varying channel such as Rayleigh fading. Therefore, channel estimation scheme using time sample replacement scheme adapted for scattered pilot symbols is proposed in this paper. By computer simulations, the proposed scheme can achieve better characteristics than the conventional scheme.

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Fuji Television has developed the equipment “SDI-Hyper” which can be transmitted the carrier of one transponder (36MHz) or IP at high speed (960Mbps) via HD circuit. This equipment is useful in site diversity of SNG and transmission of 4K, file.

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This protocol makes it possible to transfer files using DVB-ASI line.

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We propose a method for acquiring clear color images under low-light scene. We use RGB-NIR single sensor with NIR flash control. Our imaging system allows us to obtain long exposure RGB components and short exposure NIR components in one shot. Using both the captured images, we reconstruct clear color images.

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In this paper, we propose a fundus camera based on high speed imaging at infrared wavelengths. We have fabricated near-infrared (NIR) band-pass filters and reconstructed a color image from NIR images.

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Förster resonance energy transfer (FRET) between molecules is an important phenomenon which can help understanding various biological interactions at molecular level. A small and compact FRET image sensor was designed and produced using CMOS technology.

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We developed a system that categorizes news articles by distributed vectors and visualizes their relations using self-organizing maps. In this paper, we describe the outline of the method and experimental results of visualization.

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In this paper, we proposed the visual evaluation of series position effect for the ability of short - term memory. Our method displays colored five patches in the 10 degrees field of view, and participant memorizes the color name in a sequential order. As the result of experiment for short - term memory , compatible trend is obtained as same as verbal test with series position effect. Moreover, the explicit difference exists that the ability of short - term memory in 50’s participant is degraded compared with 20’s participant.

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NHK has developed the 22.2 multichannel audio production system. In this paper, we propose an upmix Algorithm for 22.2ch audio from conventional 2ch stereo, which is based on adaptive signal processing.

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We developed an individual identification method using the difference of blinking speed distribution. This feature of blinking was measured by a high-speed camera and extracted the time variation as a percentage of the eyelid aperture. Next, a calculation of normalized correlation was used to evaluate the speed distribution in each position of eyelid. As a result of comparative experiment between voluntary and spontaneous brink by 6 participants, we found that the accuracy of individual identification with voluntarily is better than spontaneity.

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Si-doped zinc oxynitride (ZnON) thin-film transistors (TFTs) were fabricated using co-sputtering of Zn and Si targets. It was found that Si doping was effective at decreasing the carrier concentration in ZnON films. Furthermore, it was demonstrated that Si-doped ZnON-TFTs exhibited less negative threshold voltages than those of non-doped ZnON-TFTs.

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We have developed a magneto-optical spatial light modulator driven by spin transfer switching (spin-SLM). We have fabricated a spin-SLM device which has a 1000 × 1000 array of pixels with a 2-m pixel pitch and succeeded in its electrical operation. Moreover, we investigated a voltage-controlled magnetic anisotropy effect in the spin-SLM.

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We proposed a mortar-like electrode structure to improve the response time and alignment stability of twisted vertically aligned-mode devices for high-contrast reflective color LCDs. As a results, we confirmed response time of TVA mode was improved from 13.6 ms to 3.9 ms by controlling the alignment axisymmetrically in each pixel.

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We measured the empirical horopter at different apparent distances of the standard stimulus. The standard and comparison stimuli were presented with disparities on a display. Observers reported where they appeared at the same depth plane. The results showed that the empirical horopter was positioned closer to the standard stimulus as the apparent distance of the standard stimulus decreased. The stereoscopic space could be less distorted in front of the zero-disparity plane

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In our gaze detection system, the relative positions between a PC screen and optical systems for gaze detection are required for accurate detection. In the present study, we proposed an automatic estimation method for determining the relative positions using the reflection images of the light sources on small spherical surface, which are attached both to the frame of the PC screen and to the optical systems.

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For accurate gaze detection, the user gaze calibration which corrects the difference between visual and optical axes of an eyeball is necessary. In the present study, in order to automatically deal with the replacement of the user, we proposed the user discrimination method based on the p upil shape distortion for automatic selection from the several registered user calibration values.

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We are developing the next - generation field pick - up unit (FPU) to achieve higher data rate and link reliability in mobile environments . We prototyped our proposed 4x4 TDD - SVD - MIMO system , and evaluated its transmission performance in an indoor experiment .

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We are developing a next generation mobile relay FPU (Field Pick-up Unit) toward the capacity increase and higher link reliability in mobile environments. We conducted field experiments using the experimental equipment that adopted our proposed 4x4 TDD-SVD-MIMO technology.

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Time Division Duplex (TDD) - based bidirectional digital field pick - up unit (FPU) system is now being studied. Hence this new digital FPU system shares its frequency ban d with other wireless systems, digital FPU system should detect and avoid the interference from other systems. We studied the frequency sensing scheme using received power within preamble signals. From the results of baseband link - level computer simulation , it was confirmed that the proposed scheme achieved an excellent performance of interference detection.

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In the video encoding process which is necessary for the transmission of video signal, it is common that the image deterioration is caused when the image switching. This is recognized that lowering of similarity to previous frame is primary factor. To improve that similarity, this paper describes the measures of sharp change detection of video signal.

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We have been developing a system for automatic extraction of important tweets for news program production. In this paper, we show a system which shows important tweets that are automatically extracted and categorized using neural network. The system collects feedbacks from users, which can be used as additional training data to improve the accuracy of extracting tweets.

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A conference system with three - dimensional drawing using digital pens and a dot screen is proposed. Writing to the three - dimensional surfaces is possible even for users who does not master the three - dimensional CG tool. It can be expected to apply our meth od to medical care and product design.

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We have proposed a digital media content management system based on the blockchain technology. In this system, metadata such as copyright information or identification of a media content, not a content itself, is registered. It is important to link the content and its metadata uniquely even if the resolution or a coding method of the content is changed. We proposed a registration of the media fingerpr int in order to link a content and its information in the digital content management system .

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This paper proposes a generation method of utterance based on the keywords in the captions of TV programs. This method generates a n utterance text by combin ing the keyword and a template sentence that express emotions .

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Low toxic q uantum dot light - emitting diodes (QD - LEDs) were fabricated using ZnS - AgInS 2 solid solution (ZAIS) and their electrolumine scent properties were investigated. The emission color of ZAIS c ould be controlled by changing fraction of ZnS content in ZAIS. Th e QD - LED using the ZAIS , which gave 86% of the photoluminescence quantum yield , exhibited red light emission from ZAIS i n the DC voltage and its external quantum efficiency was 1.9% .

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We d evelope d efficient gre en Organic L EDs (OLEDs) with high color purity utilizing a platinum complex as an emitter . A 22% External Quantum Efficiency was obtained from a bottom - emitting OLED with CIE x - y coordinates of (0.27, 0.67). Furthermore, the CIE x - y coordinates reached (0.18, 0.74) upon employing a top - emitting structure.

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There are two ways to read an electronic book: reading visual content; and listening to audio. The present study examined the level of comprehension when combined with reading and listening to electronic books.

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In this research, the condition of optical properties on the headset for virtual reality (VR) systems are focused as one of reasons to cause motion sickness. The prototype headset was designed that each user was able to adjust optical properties for both the left and right eyes.

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In this study, we observed the differences in eye movement characteristics of subjects during visual scanning of a given scenes and during a mental visualization of the same scenes. Remote and head-mounted eye trackers were used to investigate spatial scanning and smooth-pursuit eye movement of the mental image, respectively.

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sic experiment. As a result, different method of video display have some influence on human even with the same contenDepending on the video display method, “Is there a difference in behavior level such as excitement, memory, understanding, etc.” This things will be clarified by bats.

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It is difficult to understand a ball movement direction in a ball game without visual information. We propose a direction indicate method by sliding a protuberance across the skin in a direction. Results of an examination to indicate direction by a sliding protuberance are reported.

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We are developing a microwave link for 4K･ 8K program contribution. To increase the data rate, OFDM with higher-order modulation and a dual-polarized MIMO technology are introduced. LDPC codes are employed to suppress the significant increase in the required carrier-to-noise ratio due to the higher-order modulation.

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We developed smart FPU (Field Pick-up Unit) which could transmit video footage quickly. This smart FPU implements wireless IP transmission owing to TDD (Time Division Duplex).

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We are developing a 42-GHz-band wireless link that can achieve 8K UHDTV live feed and electronic news gathering. The development of a dual-polarized Cassegrain antenna for the 42-GHz-band wireless link is reported. The antenna gain of 40 dBi with a 300-mm-diameter parabolic reflector is achieved.

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To simplify base station setup for wireless camera system, we are developing a radio over Ethernet system which transfer digitized radio signal from a radio head end to a radio processing end. Since frequency drift of sampling clock degrades signal quality, a simple clock synchronizing method for Ethernet is developed and successfully tested.

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Authors have been developed an 8K rigid endoscope system consist of a 1.7 inch 33M-pixel small camera and a new rigid endoscope with small F-number optics. The high resolution of 3,600TV lines was obtained in this system. This technology is expected to be useful for advanced and safety medical care.

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An implantable image sensor is a micro-device that can be implanted in a small animal brain. This technique enables biological activity measurement of freely moving mouse. In this study, we designed a CMOS image sensor chip with an on-chip ADC for implantation to reduce external noises.

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We propose a Si-CMOS terahertz image sensor. Our imaging pixel used a microstrip patch antenna for receiving THz waves. However, these antennas’ narrow bandwidth and large ground-plane size cause major problems. We introduce an on-chip folded-slot antenna to solve the problems. As a result, we successfully reduced the size, while keeping an antenna gain of 0 dBi over a broader bandwidth than the previous antenna.

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We have developed a contact fluorescence measurement system. Our device of the system consists of an FOP with excitation light elimination filter and a CMOS image sensor without an optical lens. We have demonstrated to measure the fluorescent solution droplet array by using the fabricated device.

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