In order to realize video storage for video surveillance system market, the MPEG-4 encoder was developed. Timestamp generation method in the MPEG-4 encoder are described in this paper.

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A mega-pixel surveillance system using high-resolution pictures is developed. The system displays the live video and the electrical pan-tilt-zoomed (PTZ) images simultaneously. As a result, the blind spot problem in the optical PTZ is solved, and the overlooked object can be decreased.

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We developed an H.264/AVC real-time software. H.264/AVC contains many effective coding modes, which require a large amount of calculation time. Our coding algorithm employs mode reduction, optimized fractional-pel plane calculation and parallel encoding. As a result, encoding speed of our software has achieved up to 30fps for 720x480 pixels.

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We developed a H.264/AVC based real-time encoding/transmission system. Since encoding of H.264/AVC requires a large amount of calculation power, the total calculation cost for realtime audio/video bi-directional communication has to be minimized while maintaining video quality. In this paper, we propose a system which achieves H.264/AVC live encoding/decoding of 30fps for 720x480 pixels with HE-AAC audio.

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A highly efficient video transmission system is proposed for swift video reporting from a disaster or accidental area. The system supports H.264 as well as software multi-link capability in order to achieve higher transmission throughput. A portable terminal is developed as an implementation of the proposed system.

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We developed Attendance Indication System on Multi-Media Platform : MIXTURE.

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RLM (Receiver-driven Layered Multicast) is an efficient solution for streaming multimedia content over IP networks. This paper proposes a reception control method for RLM with multiple sources, in which a receiver subscribes or unsubscribes to layers with consideration on the user-specified content priorities.

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This paper proposes a remote monitoring system that is based on cellular phone and IP network. The camera control using cellular phone is studied and the effectiveness is shown.

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We developed a CPU-based real-time video transmission equipment for remote video surveillance with 3G cellular phones. This paper proposes hardware configuration to realize very small size and optimal software implementation on the medium performance CPU that has a video encoding accelerator. In addition, performance evaluation is also explained.

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The LDPC decoder for perpendicular magnetic recording channel with burst is studied. A new sumproduct LDPC decoder with a burst position and length detector is proposed. The proposed system has the tolerance to a burst of 400 bits, while the conventional system has that of only 150 bits.

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In optical recording system, the tracking servo system must follow the track of optical disk against the influence of the force disturbance. This paper proposes a new force sensor-less robust tracking servo system, which detects and suppresses the sudden disturbance without external sensor.

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In optical recording system, the tracking servo system must follow the track of optical disk against the influence of the periodic disturbance. This paper newly proposes a high precision robust tracking servo system using ZPET-FF, which suppresses the periodic disturbance caused by track eccentricity.

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We propose a hierarchical algorithm in both temporal and spatial domains for detection and acquisition of IDs in the "Opto-Navi" system to reduce power consumption at the terminal. The algorithm is validated by the experiments.

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We have developed the network camera which transmits the image of the 1280×960 size. The image transmission rate of this camera realized 20 frame per seconds.

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The random noise appears more clearly in the flat part. Therefore, the experiment was made to remove the noise in the flat part from the image using the unevenness coefficient. From this method, it can be clear that the noise is removed from the image.

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Assuming that a ladder antenna has a structure of directly stacked number of full-wavelength quadrangle loops with a reflector, when the feed point is situated at the centre of the ladder type radiator. In this paper, we present useful designs from 2L to 6L ladder antennas for receiving UHF-DTTB (Digital Terrestrial Television Broadcasting), and that the dimensions are calculated according to the results made by the moment method.

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In a Two-Cirular Loop Antenna with a reflecter 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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It has been known that a good broad band antenna could be obtained by adding parasitic element at a small distance from and parallel to a monopole antenna. In this paper, a broad band twin delta loop antenna with a closely spaced parasitic element is presented. The effect of closely spaced parasitic element on twin delta loop antenna is discussed with respect to properties of input impedance. As a result, it is found that the twin delta loop antenna with closely spaced similar parasitic element have one octave band width.

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The conversion of data format made it possible to use a spectrum analyzer as a time- sequential level meter.

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Using a pair of spot-focused dielectric-horn antenna, complex permittivity ε^* of dielectric material was measured at K-band(18GHz〜26GHz) in free space without limitations on sample size, harmonic generation and experimental artifacts.

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In SFN, we receive compound radio wave of OFDM signals from more than one transmitter, but it is impossible to measure the each of them directly. Therefore we proposed the measuring and calculating method to grasp the each power from transmitters, and confirmed the validity of this method in IBARAKI where SFN had been constructed in.

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We have proposed Carrier-by-Carrier Bit Error Ratio (BER) measurement of an ISDB-T OFDM signal to identify the cause of interferences in received ISDB-T signal. Carrier-by-Carrier BER measuring equipment was manufactured for trial and the performance was tested on both laboratory and field experiments. The result showed the effectivity of Carrier-by-Carrier BER measuring system.

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Influence on MIMO-OFDM transmission made by automatic gain control (AGC) function in multiple front-end receivers is considered in this article. More than 10 dB of CNR penalty is seen when receiver AGC is applied under the condition that signal receiving power of one of multiple antennas is 20-dB lower than that of the others.

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For digital terrestrial broadcasting, we developed the prototype of on-board terrestrial digital TV receiver that can receive 12 segments and 1 segment simultaneously, and can switch each other according to C/N ratio automatically. While moving by vehicle, the receiver can provide seamless service without sudden freeze frame of video. We measured BER of 1 segment and 12 segments using this receiver on a vehicle. Test result shows that the service area will be extended compared with a receiver that can receive 12 segments only.

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In this paper, we propose an effective H.264 decoding method for mobile services. We had developed the method of switching from HDTV(High Definition Television) segment to H.264 segment dynamically according to the state of electric field strength to maintain enough quality of video. There are two problems to be solved for above method. One is the flicker noise when the segment switching is occurred, and the other is the block noise due to the instantaneous break of data. To solve these problems, we had developed the double decoding method with keeping simultaneous time stamp, and the IDR(Instantaneous Decoder Refresh) timing decoding method, that is, it makes use of an Intra frame refreshment effectively. Also we build a test system and verify the effect of proposed method. Test results show the effectiveness of our approach.

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Service for hand-held reception using one segment of ISDB-T is scheduled to be launched by Spring 2006. In this article, we study on the relation between the time-interleave length and correct reception rate in the hand-held reception environment. As a result of the field experiment, it is shown that the correct reception rate is improved as the interleave length increases and the difference of the correct reception rate between time-interleave length I=4 and I=2 is about 9%.

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In mobile reception of digital terrestrial broadcasting, receiving performance is deteriorated because of channel estimation error caused by receiving level fluctuation under multipath fading environment. We have proposed the diversity reception system using channel estimation by each symbol to improve receiving performance at high speed mobile reception, and experimental results show that the proposed diversity reception system is able to work stably at the 100Hz of the maximum Doppler frequency under the typical urban area propagation environment.

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We have developed a 4-branch space diversity receiving system to improve ISDB-T mobile reception performance. We investigate coverage area for HDTV mobile reception with our system in Nagoya. It is shown that coverage area is inside 75 dBμV/m contour drawn by the field strength prediction software for fixed reception.

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We have been developing a low-voltage Pulse-Frequency-Modulation (PFM)-based vision chip using capacitive-feedback reset and pulse-domain digital image processing. We have fabricated a 12 x 12-pixel PFM vision chip in a standard 0.35-μm CMOS technology. From the experimental results, we have demonstrated 1.2-V operation of several kinds of image processing.

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The image sensor with the function for high-speed readout in multiple region-of-interests which receiving ID signals and capturing normal images is proposed for the "Opto-Navi" system. A QVGA image sensor is fabricated in 0.35-μm CMOS process. This sensor can capture ID images @ 1.2 kfps/ID with capturing normal images @ 30 fps.

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In this paper, we describe the design and implementation of a one-chip camera device for a capsule endoscope. A prototype chip with 320x240 effective pixels was fabricated using 0.25μm CMOS image sensor process and the autonomous imaging was demonstrated. The chip size is 4.84mmx4.34mm. Using a 2.0 V power supply, the analog part consumes 950μW and the total power consumption at 6 fps (20MHz carrier frequency) was measured to be 3mW.

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A wide dynamic range image sensor with column parallel A/D converters which has a function of column FPN cancellation is proposed. Designed image sensor is utilizing burst readout multiple exposure (BROME) to expand its dynamic range. The offset voltage of an operational amplifier which is one of the most important component of column FPN is cancelled by using cross coupled connection during the signal sampling phase. The efficiency of this technique is verified from measurement results.

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In this paper, the comparison of image synthesis methods using a wide dynamic range (DR) CMOS image sensor with multiple exposure-time signals is discussed. A wide DR synthesis method using logarithmic compression in digital domain has a better image contrast than that with a piecewise linear synthesis method.

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Wide-dynamic-range and linear imaging can be done by controlling the timing of PD reset signal for each pixel. We have designed and implemented a CMOS image sensor with reset control function based on pixel parallel architecture. We show the results of the evaluation of the prototype.

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We propose a multi-camera surveillance system to track people moving over wide areas. This paper shows the outline of our system and the deliberation of the arrangement of multiple cameras. We also propose fast and robust tracking algorithm suitable for outdoor surveillance and show its availability.

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We have developed a new trigger system for an ultrahigh-speed camera. This system generates a trigger signal that notifies a timing of taking picture with detecting a brightness change of the object. To detect a brightness of the object without receiving influence of the background light, the system illuminates a frequency-modulated light and detects only the modulation frequency component of the reflected light.

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By controlling the exposure value and the tone characteristic adaptively, the trade-off between the dynamic range and contrast is eliminated. In this system, the optimal exposure value and tone characteristic are selected for every input image to improve image quality. Since the proposed technique does not need complicated operation, it enables real-time processing with F/W.

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We developed the small-sized SXGA camera with USB 2.0 interface. In this camera, image processsing, image analyzing and generating timing pulses are done by the single FPGA chip. This contributes to small-sizing the camera. Using the USB 2.0 interface, we achieved a 15 fps frame rate at a SXGA image size. This camera is available for various situations.

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We have developed the demosaicing methods based on the changes of colors in a local region. In this paper, we describe the technique to improve the demosaicing accuracy. The proposed technique evaluates the reliability of the analyzing result of the color changes and improves the demosaicing accuracy by switching the demosaicing methods according to the evaluation result. The result of image simulation show that the improvement can reduce the artifact noises.

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Previously we have presented the sharpening-demosaicking method with the total-variation (TV) based super-resolution. The TV-based super-resolution effectively suppresses ringing artifacts around salient edges, but it excessively flattens original signal variations in texture regions. This paper presents a scheme that controls the TV-based super-resolution adaptively according to the magnitude of color edges around a pixel to be processed.

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We have developed an HDTV handheld high-speed camera that uses three 2.2 M-pixel CMOS image sensors. The camera can shoot and record the image at maximum speed of 300 flames par second (fps). High quality pictures of slow motion and stop motion were obtained by means of progressive scanning.

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