We studied an improvement of the demodulator for Digital Terrestrial Broadcasting, and achieved the error correction that exceeded the ability of error correction of conventional Reed-Solomon Codes.

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We developed AC Codec and Receiver for DTTB. AC is modulated in DBPSK and has the characteristic which is low delay. By using this equipment, broadcaster can transmit low delay audio and data. Now we are considering how to apply for contents making and broadcast system by using this equipment.

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We propose a splicing system for MPEG-2/H.264 video bitstream programs without re-encoding. This study includes a new message definition to notify video codec type change, a partial re-quantization method in the splicer, and a design consideration of an integrated MPEG-2 Video/H.264 decoder. As a result, we found that the integrated decoder can seamlessly decode spliced programs.

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This paper addresses a high quality splicing method for MPEG-2/H.264 program insertion system. The proposed method introduces picture type conversion and re-quantization technique for frame accurate splicing. Experimental results proved that the proposed method realizes seamless splicing of heterogeneous bitstreams and minimizes picture quality degradation of the spliced programs.

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We are developing audio watermarking techniques which enable extraction of embedded data by cell phones. For that we proposed a data embedding noise reduction technique applying an auditory stream segregation. In this paper, we describe an abstract of our proposed technique and application to information broadcasting for mobile terminals.

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The "B-to-B-to-C" business model--in which content delivery and billing are performed by an internet service provider (ISP) entrusted by a content holder--has caught on with content-distribution businesses on the Internet. It may be necessary to provide content or sort billings and so on according to the attributes of the viewer as required by the content holder. This paper proposes a new method of viewing control using the attributes of the viewer managed by the content holder while keeping attributes to the ISP secret. We present a method for the broadcaster to collect viewing logs in real time with personal identifiers by using ISP securely. We implemented this technology in an experimental VoD system for commercial mobile phones using a mobile public network.

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This paper describes our study to implement a service that provides visually impaired people with a read-out presentation of a superimposed news flash text. Data broadcasting is used for automatic start-up of speech that is generated by a speech synthesizer. Four possible solutions are considered and each of them is tested using a trial system.

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We have been investigating depth estimation method by DFF(Depth From Focus) using tilted focal planes imaging. This method uses fewer multiple focus images than ones for traditional method. Therefore it is suitable for real time depth estimation accomplished by high speed processing.

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This paper presents an analysis of the influence of ambient light to range resolution in a TOF range image sensor with ambient light charge draining structure. The ambient light charge draining efficiency R_A of 89.7% is achieved. The theoretical model of the range resolution under the influence of ambient light relatively well agrees with the experimental results.

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This paper describes a new type of global electronic shutter pixel for reset noise canceling in CMOS image sensors. The pixel has two potential wells with pinned diode structure, and allows two-stage charge transfer. A global electronic shuttering function and reset noise canceling can be realized by the two-stage transfer. Charge transfer characteristics of the proposed pixel are investigated with simulations.

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This paper addresses a high quality splicing method for MPEG-2/H.264 program insertion system. The proposed method introduces picture type conversion and re-quantization technique for frame accurate splicing. Experimental results proved that the proposed method realizes seamless splicing of heterogeneous bitstreams and minimizes picture quality degradation of the spliced programs.

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We propose a new method of wide dynamic range imaging and non-linear representation by adaptation to the brightness distribution of objects. We also present an image sensor we've fabricated for realization of the method and verified the effectiveness.

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This paper describes circuit architecture and operating principle of a wide-variable gain current mirror operating in subthreshold region for implementing a high-sensitivity and a wide-dynamic range CMOS image sensor.

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We are developing an implantable CMOS image sensor module for in vivo fluorescence imaging of mouse brain. We successfully developed an imaging device for in vivo experiments with less-invasive outline, evenly embedded excitation light source and improved biocompatibility.

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In this paper, a CMOS image sensor for fluorescence lifetime detection is presented. The fluorescence lifetime is a powerful tool to analyze molecule's structures, dynamics, and environments. The CMOS image sensor is designed and implemented in 0.18μm CMOS image sensor technology. The sensor consists of 256(H)×256(V) pixels, a vertical and a horizontal scanner, noise canceling column readout amplifiers, output buffers, and a delay circuit for pixel control pulses. The experimental results show that the proposed sensor can measure the lifetime in a nanosecond range.

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We have modified potential distribution of filter-less fluorescence detection sensor to improve wavelength differentiation characteristic. The potential distribution was changed from gentle slope to steep slope. In consequence, the measuring lower limit was expanded and the coefficient of correlation was improved from 0.966 to 0.999.

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A method of shoeprint coding using logarithm converted autocorrelation on Radon transform(LACR) is proposed. Autocorrelation on the LACR with some regularization become invariable in object expansion, translation, and ratation. We identify objects with their autocorrelation on the LACR, and estimate of two objects using phase only correlation.

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This paper presents the method for extraction of the features on the lip area. It is difficult to extract the lip area of the testee presses the expression only by color system. Then we tied to extract the lip area by adding information of a continuous frame and a shape of lip line to color system. We compared it with the previous methods. Moreover, we examined the method for extracting feature quantifies from the extracted lip area.

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This paper presents similarity based on isodensity maps. A personal authentication system based on the isodensity maps has been already presented. The previous method has the problem that the similarity was not stable. Therefore, the method calculating stable similarity is examined.

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We analyze and optimize parameters of the pathology-image retrieval method which we have proposed. In the method, we use nucleus-cytoplasm which is one of the useful features of pathology-images. This feature is calculated for each block in the method. In this paper, we show that the optimal block size is about twice as large as the average size of nucleus.

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This paper aims at stabilizing the accuracy of face detection from TV video. The proposed method detects candidate regions of face from the current frame and verifies the face candidates keeping the continuity between frames. Experimental results confirmed that the proposed method achieved highly accurate and stable detection for key face indexing.

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The ROI prediction model based on the color information of coded still image is proposed. This model is using the color information such as hue, chroma, brightness, color difference with surroundings, and the complexity of image content. The obtained ROI prediction data is comparing with the real data from the eye-tracker system.

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We propose the continuous video quality evaluation model for coded stereoscopic video. This model is based on the combination of frame quality, motion vector information, and disparity information without using the reference information. The evaluated video quality has good agreement with the subjective MOS data derived from the SSCQE method.

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We propose the Full-Reference video quality evaluation model using ANSI standard parameters for H.264 coded video. For subjective assessment test, we use 240 kinds of VGA resolution video sequence for various bit-rate and frame-rate. To obtain the evaluation model, we employ the stepwise regression based on 12 kinds of ANSI standard parameters and edge-PSNR.

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At a diagnosis on the case of the Alzheimer-type dementia, doctors especially look at the temporal lobes. We proposed an edge detection method for the temporal lobes by using Snake model. It was observed that the proposed method detected effectively the contours of the temporal lobes.

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For testing the controllability of controller in virtual environment, we trace multi-fingers and hand movement, and consider the interaction between virtual buttons and hand. We propose the evaluation method of button control on handheld devices using the SPIDAR-H and AR technology for tracking the fingertip and hand movement.

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To clarify the effect brought by a stereoscopic image in human interface, we are developing a system which can analyze the binocular eye movements while searching an object of the specific depth from the image, in which various depth objects are scattered.

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Tile Palette (TP) is proposed for mixing colors on a display. It is possible to set up the color space that matches each user's color image and knowledge in order to promote user's system understanding. TP can show quantity of color and mixing process visually by tile interface.

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To efficiently identify subjective colors, we devised a simple application program which displays reference colors to match the subjective colors. We first choose a color from a course color palette, then choose a color from a fine color palette.

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It is well known that the contents of utterance can be recognized from lip motions. This paper proposes a method for noncontact command input interface by using three kinds of lip motion features. The experimental results with 10 commands show that these lip motions are useful for command recognition.

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Analysis of gigantic BBS and system construction cooperates with other information

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This explains about Monopole and Dipole antenna and it's measurement results.

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A parallel branch wire element which is attached parallel to the antenna element works as a loadings element of the antenna as well as short-circuited coaxial stub. In addition, the parallel branch wire element works to thicken the element diameter of the antenna. In this paper, the monopole antenna with the parallel branch wire was analyzed. The effect on the monopole antenna with the parallel branch wire was examined for broadband performance of the impedance characteristic. As a result, it is found that the monopole antenna with the parallel branch wire have broadband.

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In a Two-Quadrangle Loop Antenna with a reflector it investigated about input impedance, radiation pattern, and power gain. It aims at development of the antenna to acquire the following features in a wide frequency band. 1, Input impedance adjustment can be easily taken. 2, It is high power gain. 3, When multiple arrangement is carried out, Horizontal radiation pattern becomes omnidirectional pattern.

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In a Two-Circular Loop Antenna with a reflector it investigated about input impedance, radiation pattern, and power gain. It aims at development of the antenna to acquire the following features in a wide frequency band. 1, Input impedance adjustment can be easily taken. 2, It is high power gain. 3, When multiple arrangement is carried out, Horizontal radiation pattern becomes omnidirectional pattern.

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the following result gets 1, Power gain of multiple arrangement is high. 2, Horizontal radiation pattern of multiple arrangement approaches omnidirectional pattern. 3. It is low VSWR.

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In this study, we explain the characteristic evaluations of microwave absorbers for central frequency 5.8GHz used by an ETC system on a highway. Using this arrangement and changing the structure of it, we evaluated a bias incidence characteristic of Transverse Electric waves, Transverse Magnetic waves and circularly polarized waves in a free-space.

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This paper describes indoor experimental results of robustness against co-channel interference suffered by analog FM broadcasting on a digital terrestrial broadcasting (ISDB-T) receiver. We evaluated the equivalent C/N degradation of the partial reception segment in ISDB-T receiver under the condition of FM interference environment. As a result, we confirmed that the amount of equivalent C/N degradation depending on the type of FM broadcasting programs.

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Reconsidering current way of designing or constructing of apparatus, we have developed compact and lightweight transmitters for low-power relay stations of digital terrestrial broadcasting, which also suffice the required specifications. The report below says about the results of critical temperature and humidity test in a factory, and long term stability tests of summertime 06 and wintertime 06-07, having the transmitters installed under actual conditions.

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We provide a theoretical improvement in bit-error-rate performance of a diversity reception using a majority decision algorithm. We will apply this diversity technique to HDTV transmission system in millimeter-wave band. From the analysis, the carrier-to-noise ratio improvement is 3.1 dB for ASK, BPSK and QPSK with the three-branch diversity reception at the BER of 10^<-12>.

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NHK is studying the advanced satellite broadcasting system which the Integrated Services Digital Broadcasting for Satellite (ISDB-S) system was improved. This advanced system can make use of the hierarchal transmission scheme using Transmission and Multiplexing Configuration Control (TMCC) signal adopted by the ISDB-S system and its channel capacity can be increased by using multi-level modulation schemes combined with Low Density Parity Check (LDPC) codes. In this paper, we report the LDPC codes we designed which are suitable for the transmission format of the advanced satellite broadcasting system and the computer simulation results of performances under the AWGN channel model.

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In recent years, high speed, large capacity and reliable data communication is demanded. OFDM is focused as one of the candidates satisfying these demands, because its frequency spectrum is ideal rectangler shape. However its performance is degraded under severe multipath fading environments. Therefore, in this report, performance of the scheme of iterative detection of pre-coded OFDM combined with error correcting code is analyzed. As the result of simulation, good performance under severe fading was confirmed.

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