We fabricated a 128x96 pixel, stacked organic image sensor with R-, G- and B-sensitive organic photoconductive films, each of which had a zinc oxide (ZnO) thin film transistor (TFT) readout circuit. A color image obtained from the sensor shows the potential for the development of high-resolution prism-less color cameras.

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We have fabricated a stacked photoluminescence film with an amorphous selenium (a-Se) photoconductive layer and an organic EL layer. The spectral luminescence properties and the characteristics between the intensity of the incident light and the emission light were measured. From these results, we concluded that the photo carrier flows into the organic EL layer and causes electroluminescence.

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A pH (power of Hydrogen) and optical multimodal bio-image sensor is developed with low signal interference which occurs the strong light is irradiated during pH sensing period. The cause of the interference is shown to be a mechanism of pH measurement. We successfully removed the signal interference by changing the mechanism of pH measurement.

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We fabricated an in-vivo fluorescent image sensor with an interference filter and a light guide array. We demonstrate improvement of spatial resolution and fluorescent imaging by the sensor.

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To realize a miniaturization of the sensor chip for μTAS system, we propose a polarization analyzing image sensor using 65nm CMOS process for the first time. We describe the design details and characterization of our proposed CMOS image sensor. By the fabricated sensor, polarization property is successfully measured.

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We are currently in the process of developing Super-Hi-Vision(SHV) system with 4320 scanning line. In order to reproduce the image of SHV on a plasma display panel(PDP), the high-frequency address driving techniques must be required. However, the high-frequency address driving cause image degradation, because an increase of the address driving can result in unstable discharge. Hence we propose a method for simultaneous scanning of multiple lines to shorten the address discharge period.

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Color reproduction using a wide-gamut system colorimetry proposed for UHDTV is demonstrated.

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We have made a prototype of LED display system with High Speed Frame Rate, which enable s to display the image recorded by Super Slow Camera, without missing any lines. It also reduced periodic variation of brightness when the image is played in slow motion.

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Dome theaters are suitable to provide enhanced sense of presence to viewers. Contrast ratio is degraded with larger screen sizes on a dome theater. Quantitative measurement of contrast ratio versus screen size was carried out and possible solutions are discussed.

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We have developed the laser TV with moving screen system to decrease speckle noise. A reasonable measure of speckle noise is the ratio of the standard deviation to the mean defined as speckle contrast. In this paper, we quantitatively discuss about the relationship among probability density function, speckle contrast and upper probability.

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3-D recursive search block matching which has been used for motion estimation is efficient and effective algorithm. However, the algorithm tends to fail to estimate the true motion when the spatio-temporal smoothness of motion is not held. In this paper, we propose a novel motion estimation algorithm using hierarchical search.

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A 5-in. QVGA flexible AMOLED display with OTFT backplane has been fabricated. The gate insulator film of the OTFT backplane was formed using solution process. The fabricated OTFT-driven flexible display, in which phosphorescent materials were used as emitting layers of OLEDs, showed clear moving images.

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A wide-QQVGA flexible organic thin film transistors (OTFTs) backplane was fabricated using a new transfer technology. The characteristics of the transferred OTFT could almost be maintained after the transfer process from glass to plastic substrates. We confirmed that this transfer technique is useful for the formation of an OTFT backplane on a plastic film.

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The authors have been developing high efficacy mercury-free cold cathode fluorescent lamp with auxiliary external electrode (AEE). In this study the inside electrodes were optimized and it is found that thinner and longer cathode (high voltage side) and thicker and shorter anode (ground side) are preferred for sleeve shape electrodes.

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A double-frequency and -voltage driving technique is proposed for luminous efficacy improvement of Xe content PDP. The sustain pulse consists of a low frequency, high voltage pulse and high frequency, low voltage pulse. Luminance and luminous efficacy of 50% Xe panel increase by 40% and 60%, respectively.

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We have developed the compact high resolution CRT for HDTV viewfinder. By using phosphor thin-films, the horizontal resolution of 900 TV lines was obtained by optimizing the device structure of CRTs and the growth condition of phosphor thin-films.

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A playback system of high-definition video content with multi channels is described. The content has 4 channel's high-definition video in one MPEG stream, and the playback was successful to display the content on each high-definition television (HDTV) display.

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Recently, we have proposed a method for clipping a rectangular region from an image by minimizing a weighted intersection of two color histograms of inside and outside of the rectangular region. In this paper, we propose a method for detecting salient regions on the basis of the two color histograms of the inside and outside of the clipped rectangular region. We experimentally compare the proposed method with the latest method by Achanta et al. Experimental results show that the proposed method can detect salient regions more clearly than Achanta's method.

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This paper proposes a new JPEG restoration method to suppress the block noise and the mosquito noise of the JPEG compressed image. Our new method applies the redundant DCT and the soft shrinkage repeatedly to the reconstructed image under the condition that DCT coefficients of the reconstructed image are within its specified quantization ranges.

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This paper proposes the hybrid image-denoising approach which connected the redundant DCT and the shift-invariant Haar wavelet transform hierarchically, and experimentally demonstrates that performance of image denoising is improved than the existing method.

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Previously we have proposed the color-image denoising method that applies the tight-frame grouplet transform to shift-invariant Haar wavelet coefficients of a noisy color image and then denoises those grouplet coefficients with the hard color-shrinkage. This method preserves textures and diagonal edges much better than the conventional denoising method, but it tends to cause color smears. To solve this problem, we present a method to control the application of the grouplet transform.

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This paper addresses the issue of the training optimization of a generic scalar-shrinkage scheme for their application to the wavelet color-image denoising in the shift-inavariant Haar wavelet transform domain. As the generic scalar-shrinkage scheme to be optimized through training, this paper takes up scalar shrinkage utilizing the single-variable shrinkage function, referred to as the Bayesian shrinkage function, which is derived as the Bayesian estimate according a statistical model of the mixture Gaussian distribution.

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Previously we proposed the soft color-shrinkage for the sparse coding of a color image. Our previous approach tries to optimize the soft color-shrinkage with a kind of alternately-iterative greedy algorithm, but it achieves the optimization only in the specifically qualified parameter-setting. To cope with this difficulty, this paper constructs a new projected gradient solver, which always achieves the optimization of the soft color-shrinkage irrespective of the parameter setting.

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This paper, past degradation movie proposed restoration method of four noises up to now. Integration was examined about it this time.

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Recently, we have improved our previously proposed BV-G nonlinear image-decomposition method, by introducing the hard color-shrinkage instead of the soft color-shrinkage. This paper applies the improved nonlinear image-decomposition method to the image oversampling problem, in which each component separated by the decomposition method is separately processed with an interpolation method suitable to each component.

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We introduce a method that generates free-viewpoint Images from recorded video by handy camera. In this method, Structure from Motion is used to estimate camera pose/position. In our previous work, we used a factorization method in assumption of pseudo-perspective projection. With this assumption, a camera angle cannot be changed. In our new method, free-viewpoint images can be generated from a video recorded by a camera with variable angles.

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This paper proposes a free viewpoint image generation scheme in a round camera configuration using Lagrange interpolation focused on areas that should be interpolated. By utilizing adjacent EPI correlation, good images have been generated on a condition of camera interval around 4.0 degrees or less.

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In the previous method to generate free-viewpoint images, it needs many cameras and physical costs are high. Then, the proposed method reduces the number of cameras with some mirrors and generates the free-viewpoint images efficiently. This system does not need the calibration pattern because the mirrors are in the image as already-known shape.

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The previous method used fixed camera array , which limits range of capturing. However , the proposed approach uses moving camera array to capture in lager range and generate the high-quality free-viewpoint image.

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We proposed a method of generating free viewpoint images directly from multi-focus images by dimension reduction and a 2-D filtering. However, actually, the filter must be view-dependent for improving quality of reconstructed images. In this paper, we propose a new view-dependent filter and discuss its implementation on FPGA.

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The FPUs are desired to maintain the performances even in severe or unpredictable weather conditions. We have improved the protection against ingress of water and heat-management to develop an all-weather FPU. We have met the IEC/JIS IPX4 specifications in the water-protection test.

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A TV-studio-use wireless HDTV camera, "millimeter-wave mobile camera" is being developed and bi-directional transmission is required for live TV shooting. To consider a return link system of the camera, BER performance of the OFDM and STBC transmission with 2 or 4 transmitting antennas was evaluated in Rayleigh fading MIMO channel model with channel correlation by computer simulation.

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We are developing next generation FPU that is 120-GHz-band wireless transmission system for the transmission of 10 Gbps multiplexed HD-SDI signal. This paper describes the results of indoor transmission experiments that measured BER characteristics with 10Gbps forward error correction system using convolutional codes.

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This paper presents the world smallest solid state power amplifier (SSPA) for Ku-band satellite applications which operates 80W output power that satisfies -25dBc of a third-order intermodulation distortion (IM3). The SSPA can be divided to two units for ease of transportation, though having a total size of 22.8L only. The final stage of SSPA is applied six gallium nitride (GaN) high electron mobility transistors (HEMTs) are combined.

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In the field of SNG(Satellite News Gathering), portability and reliability are required for HPA(High Power Amplifier) as its urgent operation. NHK, along with Toshiba developed a world smallest 80W class(operation power) outdoor SSPA(Solid State Power Amplifier) for Ku-band, using GaN(Gallium Nitride) devices. Transmission test verified the validity of its performance over practical communication satellite.

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When some wireless communication systems operate in the same frequency band, it is essential to employ the techniques for interference mitigation. The goal of this paper is to investigate the performance of some mitigation techniques and to show the superiority of metric based limiting, which yields the better bit error rate performance.

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In this paper, the reduction method of impulse noise is proposed in OFDM system. The proposed scheme estimates amplitude, phase and position of additive impulse noise, and generates the replica signal. By substracting the reprica signal from the received signal,the effect of additive impulse noise can be redused.

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Radio wave propagation over ground of different electrical properties has been calculated by the FDTD method. Propagation characteristics of parallel and vertically polarized radio waves are discussed.

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In recent years, study of location identification by mobile phone has been attracting a lot of attention. So far, many investigations have been carried out for GPS error performance by conventional GPS devices, but a few people study mobile phone GPS error performance. In this paper, we used some mobile telephones under various environments and examined about the GPS error performance.

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It has been shown that loading a certain reactance component at the feeding point of an antenna is useful in reducing antenna size. However, a small antenna usually has low input resistance. The approach outlined is to increase the input resistance of the small loading antenna and utilize knowledge of a folded monopole antenna. A loaded folded monopole antenna with high resistance can then be realized. Coaxial line is also used as the loading element for the loading antenna. It is proposed that a loaded folded monopole antenna can be realized by replacing the parallel antenna elements with coaxial cable transmission line. All other results are provided by computer simulation using the method of moments, since results are assumed to be similar to those recorded from practical experimentation.

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Along with the installation of a large number of relay stations for digital terrestrial broadcasting, co-channel interference occur in part of service area. As a countermeasure to this interference, we have developed an interference canceller using adaptive array technology that uses a re-modulated time-domain signal with channel distortion as a reference signal. Experimental results in a real field show the effectiveness of the canceller.

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In this report, we show the field experimental results of digital terrestrial broadcasting reception in an interference environment caused by multipath outside the guard interval. To combat the delay spread over the guard interval, we use channel equalizer that performs a fast Fourier transform (FFT) on 4 OFDM symbols in combination and equalizes the multipath distortion in frequency domain. Experimental results show the effectiveness of the channel equalizer.

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A new broadcasting system which utilizes broadband AV materials for customizing TV programs is proposed. TV programs are mixed with other AV materials on broadband network depending on each user's individual profile. With proposal system, users can enjoy TV programs more easily and conveniently.

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We propose a social television service (STS) which is generated by comments from TV viewers. In this paper, we focus on how to access information on the database which generates a various services for STS. We design API format that suits the needs of each service and abilities of each client terminal, and implement them as Restlet application.

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A service that utilizes IP network to offer additional content for a broadcast program is being developed. We focus on the issue of handling timing synchronization between broadcast and IP delivered content. This paper discusses our study to implement a system that allows for synchronization of streaming media from IP network, such as video and audio.

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We experimented on the transmission of new a spot full-segment system.

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Wide spread of broadband access environment and high performance PC lead wide use of P2P streaming. We are developing P2P streaming technologies for delivering various programs over the Internet. P2P content delivery is supported by each user's PC and network, in which performance and availability cannot be controlled. Therefore, each delivery quality quite differs among user terminal and it was difficult to evaluate delivery quality as a whole. In this paper, new stability measures for P2P live streaming is introduced and network configuration of P2P network is evaluated by this stability measures.

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We evaluated our digital watermarking technology for a video distribution system over the Internet. It is proved that our watermarks survived against video compression at distributors and degradation derived from a network environment at receivers.

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We have been doing research on high-quality transmission technologies using Ethernet devices, and developed wired and wireless Ethernet devices which can stabilize their transmission delay precisely. In this report, a jitter-free MPEG-2 TS transmission system is introduced, which keeps TS packet delay variation less than 1 microsecond.

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We study rateless codes transmitted over the binary-input erasure channel. In this paper, we introduce a novel rateless coding scheme with non-binary LDPC (Low-Density Parity-Check) codes. The decoding complexity of the proposed rateless code does not depend on the channel. Numerical experiments show that the proposed codes exhibit better performance than conventional rateless codes, especially for small number or information bits.

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