When it constitutes SFN on ISDB-T transmission network, it is necessary to do the delay adjustment between SFN Relay Station. We develop the TS/IF/RF delay measuring instrument for terrestrial digital broadcasting. This measuring instrument makes the operation easier doing the delay adjustment between SFN Relay Station.

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This paper describes the result of field strength measurement of NTSC signal transmitted from Minamitane Station at Nakanoshima Station and that from Sonai Station at Yonaguni Station. The field strength for 99.9% of the time is 16.8dB and 13.4dB lower than that for 50% of the time respectively.

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We propose a new high-accuracy squelch system for DTTB relay station. It demodulates the received broadcast wave and compares the network-id with that of its parent station. This paper describes the details of our proposal and shows the results of field experiments.

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We have developed and evaluated several Billboard shadowing techniques considering perspective transformations. Each Billboard that casts its shadow is corrected taking into account elevation to a light source. Several experimental results verify our method caused realistic shading from often billboard images efficiently.

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We propose a method for generating maze-like images by using minimum spanning trees (MSTs). We generate a stippling from a given monochromatic image by using centroidal Voronoi tessellation (CVT), and then connect all the points in the stippling with MST to obtain a maze-like image. We derive a relationship of darkness between the input images and the maze-like images by approximating CVT with hexagonal lattice, and utilize it for correcting the brightness of the maze-like images. Experimental results show that the brightness correction method improves the contrast of the maze-like images.

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Our aim in this research is generating sketch touch images form vector images such as CAD data, hi this paper, we focused on a characteristic of handwritten sketches that several strokes are generated for forming outline. Based on the consideration, we implemented an algorithm for converting vector curves to sketch touch curves.

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We have already developed TVML player which can generate TV programs using real-time CG (Computer Graphics) and speech synthesis from TVML scripts. We have also developed a new high quality TVML player using skinned mesh CG character, hi this paper, we describe functionality improvement of external control of TVML player.

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Recently, simple methods of 3D modeling are needed in CG image areas. We suggest a method of 3D shape reconstruction from a single image for simplifying 3D modeling. In this paper, we conduct a basic study of relations between the distance and defocus blur, and between the distance and color.

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We describe a new equidistant projection technique for real-time three dimensional computer graphics to generate images on hemisphere shaped screens for planetarium domes. We propose a new usage of programmable shaders, which can generate real-time projected images with in less image distortions and low processing costs.

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As "Awa Navi" appeal project, we created images related to tradition culture of Tokushima. And these explain how to dance "Awa Dance" and how to carry out a pilgrimage at "Shikoku 88 temples". These websites prove the effect of images to sightseeing and local promotion.

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In this paper, we propose a new fingerprint method for Internet video which inserts fingerprint information in logo parts in video content. This method makes it possible to solve current severe problems which can not be solved by existing fingerprint technologies.

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In this study, motion vector prediction in H.264 coding is assumed as a target technical component. First, a performance degradation problem of H.264 is addressed especially for video signals with a specific image feature. To overcome this problem, an extensive modification for H.264 standard scheme is proposed. The proposed scheme can decide the optimal prediction vector for every block dependent on corresponding image feature. From coding experiments under low bit-rate condition for HDTV signals, it was confirmed that the coding performance gain was 12.6% as the maximum case.

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We have proposed a reversible information hiding for binary images. In this paper, we presents a lossless data hiding method for JPEG2000 compressed data based or. the reversible information hiding. The propsoed method embeds not only secret data and a part, of original cover images but also the bit-depth informatin of code-blocks.

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The paper presents survivability of our digital watermarking system against re-shooting and video compression. We extracted 35-bit watermark data from 5-minute re-shot and MPEG-2 compressed moving pictures, irrespective of MPEG-2 video bitrate or screen type.

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The reference SVC encoder searches all the prediction modes to selece the best mode for each macroblock. This achieves the high coding efficiency, but needs large encoding time. We propose a fast prediction mode decision technique for SVC encoders. Our technique selects the best mode based on the similarity of coding information between layers. Experiments shows that it reduces encoding time with negligible coding loss.

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In this paper, we propose video lossless compression based on 3-dimensional prediction using spatio-temporal gradients. The proposed method predicted the target pixel using the LGM(Local Gradient Magnitude), which is the gradient between the neighborhood pixel and the current pixel in the spatio-temporal. From the experimental results, we demonstrated that the spatio-temporal gradients prediction is more efficient.

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Motion estimation is one of the key techniques in video processing. In general, the block matching is used for the motion estimation, hi this paper, we propose the method of block matching which uses sub-frame images. The method improves the speed and accuracy by comparison with the existing block matching.

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This paper proposes a partial MPEG video scrambling method that is applicable to a new digital content protection scheme, i.e., digital content duplication with gradual degradation, which requires a capability of quality control with arbitrary strength. The proposed method introduces a new threshold determination algorism for video scrambling based on the pixel variance of a partial area. Experimental results showed that the subjective quality degradation incurred by the proposed method was proportional to the value of the threshold

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We propose an adaptive coding method of motion vectors according to their magnitude in order to improve the performance of 4:4:4 video compression based on AVC/H.264. Motion vector search is performed coarsely for big motion and finely for small motion by means of restrictive sub-pel search depending on the magnitude of motion vectors to derive theirefficiently coded representations. Computer simulation for our proposed method has been performed to clarify significant coding gain for the condition of higher compression ratio, which is essentially important for end-user applications.

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Two-pass encoding method[1] for H.264 video was proposed to stabilize picture quality of a whole video sequence. However, on further investigation, it turned out that realization of uniform picture quality may be difficult in some cases. This paper proposes a noble multi-pass H.264 encoding method to improve the stability of picture quality.

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Signature-based personal identification systems are used and accepted widely due to its distinctness and stability. In this paper, we propose a new function-based method with Hilbert-Scanning patterns for signature matching. We evaluate the performance by using the online signature database Signature Verification Competition (SVC) 2004.

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This paper establishes a mathematical model of the relationship among the dimensionality of KLT, the statistical property of the input signal and the energy compaction of the transform coefficients.

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In order to provide a wide band antenna for digital terrestrial broadcasting system, We proposed a double folded monopole antenna using parasitic element. Properties of this antenna are analyzed by means of the moment method. It is possible to adjust an operating frequency of this antenna by changing a size of parasitic element easily. Moreover, it has very small size antenna and a gain of about 5dBi.

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In this paper, we propose a novel method to obtain circularly polarization for single-feed microstrip antenna using modified EBG structures. Initially, EBG structures are designed for 6GHz that is resonant frequency of microstrip antenna, and are incorporated into the microstrip antenna. The proposed antenna is simulated and measured.

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We present small and low profile antennas at 300 MHz using modified peano line and offset-feed. The designed antennas are two types. The radiation efficiency is improved by enlarging the element width. Finally, we actually mounted the antenna on the circuit, and confirmed the radiation up to 3 m.

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In this paper, high gain space-fed array antenna is proposed. This antenna consists of two layers. The under-layer consists of a fed microstrip antenna. The upper-layer consists of sixteen slot-lines. The distance between the layers is 1.5λ. Very high gain of 22.8dBi at 5.3GHz is adieved.

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It has been known that a good broad band antenna could be obtained by adding two parasitic elements at a small distance from and parallel to a monopole antenna. In this paper, the monopole antenna with the two parasitic elements was analyzed. The effect on the monopole antenna with the two parasitic elements was examined for broadband performance of the impedance characteristic. As a result, it is found that the monopole antenna with the two parasitic elements has 42% band width.

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In this paper, cross polarization characteristic of polarization switchable microstip antenna is investigated. This antenna is composed of a patch with a cross shaped slot and four switching diodes mounted on the patch. The orthogonal linear polarizations can be changed by the polarity of the control voltage applied to the diodes.

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We have proposed a microstrip antenna for triple band operation. In the antenna in our previous study, a shorting plate and helical pin operated as radiation element at the lower and middle frequency bands, respectively. In this paper, the antenna changed the order of the two operating modes is redesigned.

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For re-transmission of digital broadcasts over FTTx, we have proposed a baseband time-division multiplexing system. To apply the system to non-optical network at customer's premises, we propose re-modulation system of transmitted MPEG-2 streams. In this report, we describe a method to synchronize ISDB-T signals without rate conversion failure.

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In this report, we describe the development result about TS-Regenerator which generate synchronization signals from ISDB-T program signal(DVB-ASI) transmitted by ATM network.

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We proposed a new estimation method of delay profile for Chinese digital terrestrial broadcasting, and reduced the calculation amount.

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I developed automatic switching AM radio system that was suitable for mobile reception. This system automatically switches in best receiving station by a level comparison of each relay station and the positional information used GPS equipment.

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In terrestrial broadcasting relay stations, various filters are used for mitigating effect due to other channel signals. However, the actual filters have amplitude ripples in the passband and deteriorate the quality of broadcasting signals. In this satiation, we measured how input and output filters affect the terrestrial broadcasting signals.

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This paper presents an improvement of our previous research that applies color information in order to improve the recognition rate and equal error rate (EER). Our previous research just considered the luminance (Y) element in facial features extraction. In this research, we also consider the chrominance elements (Cb and Cr) to deal with the face skin information. The facial features vector is extracted using non-block DCT with selecting just small part of dominant frequency elements. Experimental results using data from four face databases containing 2268 images with 196 classes show the YCbCr color configuration improve the rank one of our previous result by about 5.91%. However, it requires three times more of the previous method time consumptions.

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We present a system for segmenting continuously archived human locomotion data. A portable GPS receiver acquires and stores data regarding its bearer's location and motion. A constrained hierarchical clustering algorithm segments these data into two basic classes of locomotion. A visualization incorporating user knowledge allows effective summarization of the results. A quantitative evaluation demonstrates that the average accuracy of the clustering algorithm is approximately 94%, despite the presence of location-dependent noise.

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In this paper, we propose a new method for pathology image retrieval using relevance feedback. In this method, we select a past query image which is most similar to the current query image, and retrieve the database using the retrieval parameters determined by the past relevance feedback of the past query image. By a subjective experiment, we show that the proposed method increases precision compared to the conventional method.

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It is effective and economical to diagnose as lung diseases with a traditional stethoscope, moreover it is painless for patients. While except for experienced doctors, it is difficult to diagnose as diseases with a traditional stethoscope. Therefore, we developed a system to inspect abnormal lung sounds with an electronic stethoscope, a computer and other devices.

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This study proposes two display designs of onboard TVs for reducing car sickness when watching TV in a car. Both display designs induce linear vection according to acceleration/deceleration in distinct ways. Experiment showed that the designs remarkably reduced car sickness severity.

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We aimed to develop onboard display that inhibits the incidence of carsickness. The display was designed to reduce visuo-vestibular sensory conflict by causing a sensation of self-motion coincident with car movement. Experiment showed that the approaches remarkably reduced car sickness severity.

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We examined visual effects on riding comfort in a oscillating car. Subjects were provided with roll oscillation of the body and the internal and/or external view of the car. The riding comfort was lowered when the oscillations of the internal view and the body were out of phase.

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Sound effects on the vection, presence, and discomfort induced by 3D movies were examined. Synchronized sound with screen images enhanced vection and presence without affecting visually-induced discomfort. Music served to reduce discomfort while providing moderate vection.

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We have already proposed 'PupilMouse', which is useful for the severely handicapped who can move their head to operate a cursor on a PC screen by their head movements. In the present study, we applied our head pose detection method into the conventional PupilMouse additionally. The improved PupilMouse immediately returns the cursor that shifts from the face front to the front of the face.

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Pupil detection is useful for human monitoring systems. We detected the pupils by differentiating the bright and dark pupil images which are obtained in every field. This method makes pupil detection dramatically easy. However, when a subject's quickly moves, the method does function well because of the gap between the positions of the bright and dark pupils. This paper proposes the image difference method with positional compensation based on our head pose detection method.

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