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伊達 誠, 広永 美喜也, 長江 貞彦
セッションID: 13-5
発行日: 2003年
公開日: 2004/03/26
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A moving robot needs to get the three-dimensional information of its surroundings. In this research, we propose the new technique using the optical flow for the three-dimensional view methods by a single eye. Moreover, we improved on accuracy and flexibility with a study of template matching.
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鈴井 智史, 渡辺 光司, 佐藤 美恵, 春日 正男, 羽島 一夫
セッションID: 13-6
発行日: 2003年
公開日: 2004/03/26
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In order to realize smooth communication between a man and a machine, the recognition of expressions plays an important role. We aim to construct an automatic recognition system of expressions using emotional characteristics on facial parts.
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宮地 悟史, 滝嶋 康弘, 中島 康之, 和田 正裕
セッションID: 14-1
発行日: 2003年
公開日: 2004/03/26
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This paper proposes mobile video monitoring system with an omni-directional camera, which can send a different view angle image to each mobile handset. Basic design of the system is studied, and experiments showed the practicality of the system. In addition, the point that further consideration should be given is disclosed.
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渡邊 修, 貴家 仁志
セッションID: 14-2
発行日: 2003年
公開日: 2004/03/26
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We propose a method for cross-fading of JPEG2000 encoded images. The main feature of the method is that memory usage with the cross-fading operation is lower than that of conventional methods. In this paper, firstly, problems on applying cross-fading operation to JPEG2000 compressed images are discussed. Then the method based on the code-block is proposed. The code-block is known as a coding unit of JPEG2000 coding system and it is defined as a rectangular region in DWT domain. Finally, we provide some simulations and also verify the effectiveness of the proposed method.
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山田 千彦, 朝比奈 教久, 新改 博久, 小室 哲郎, 磯野 春雄
セッションID: 14-3
発行日: 2003年
公開日: 2004/03/26
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As we enter the digital age, anybody can easily create a lenticular 3-D printing images with a computer. Cross-talk however occurs if the 3-D printing data conditions are not proper. We have found that cross-talk is caused by complicated moire between the electronic composite data and printer output and shall describe the method of improving screen quality of 3-D printing images without cross-talk.
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陳 彬, 目黒 光彦, 金子 正秀
セッションID: 14-4
発行日: 2003年
公開日: 2004/03/26
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This paper proposes a method to estimate sound source location by fusing auditory and visual information with Bayesian net. Since there are several auditory categories corresponding to different visual features, the sound signal is firstly classified into speech and non-speech categories, each of which correlate with skin-color and other color features distributed in the image, respectively. After modeling skin-color feature with Gaussian mixture model, we introduce Bayesian net to infer whether the pixels in the image correspond to sound source or not. Finally, the experimental results are presented to show the effectiveness of the proposed method.
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浜口 斉周, 道家 守, 林 正樹
セッションID: 14-5
発行日: 2003年
公開日: 2004/03/26
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Over the past year, our research team has been working on a new concept; TV4U(TV for you). The TV4U system automatically provides tailor-made TV programs based on user profiles. TV4U encompasses many processes from gathering TV resources, such as movies, images or texts, to making a presentation. In this paper, we propose a method to search TV resources and automatic production modules using their indexed metadata. Users can search for appropriate data from a lot of TV resources and automatic production modules using their metadata. We found that the TV4U system gives us the opportunity to produce TV programs with a variety of modifications depending upon user demand and contents of resources.
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田中 宏征, 坂野 鋭, 鈴木 賢一郎, 大塚 作一
セッションID: 15-1
発行日: 2003年
公開日: 2004/03/26
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フリー
Generally image and movie belong to multiple categories. Some methods have been proposed for single-labeled image and movie, but almost none can be cited for multi-labeled media. We propose a method to categorize and search multi-labeled image and movie by extending parametric mixture models (PMMs).
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特徴量に基づくスクリーニング
飯高 一郎, 小松 隆, 齊藤 隆弘
セッションID: 15-2
発行日: 2003年
公開日: 2004/03/26
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This paper presents a method for detecting and repairing film blotches with a small amount of computational complexity. The method first detects blotch candidates by using bidirectional interframe differences, and then screens those candidates out according to various image attributes.
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Cooharojananone Nagul, Auethavikiat Supatana, 相澤 清晴
セッションID: 15-3
発行日: 2003年
公開日: 2004/03/26
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フリー
In our previous algorithm, we proposed a home video summarization using shot importance. Shot importance is defined by the shot duration and motion activity. The more important the shot is, the more number of Representative frames (R-frames) is retrieved. However, when the event of all shots are unrelated. It is desired to receive more information from more shots. In this paper, we propose an improved algorithm of our previous work. Our algorithm allows user to select the number of shot to be appeared in the summarized video. The experiment shows that our algorithm gives an acceptable summarized result.
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小河 誠巳, 相澤 清晴
セッションID: 15-4
発行日: 2003年
公開日: 2004/03/26
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フリー
In this paper, we propose home video indexing based on audio event detection using GMM. Although exclusive audio segmentation and classification was usually used, various sounds overlap in practice, in which case an audio in which various sound overlapped was expressed by a labeling stratified index. Moreover, our method calculates indexes without performing segmentation. Experimentally, we showed that the proposed method correctly labeled four indexes of home video test data.
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真島 恵吾, 大竹 剛, 合志 清一, 小川 一人, 室田 逸郎, 難波 誠一, 小山田 公之
セッションID: 15-5
発行日: 2003年
公開日: 2004/03/26
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フリー
A video characteristic information extracting method for rights management and protection is newly proposed. The method computes the frequency response to successive DC components of each video frame for the characteristic information. It can be utilized for identification of illegally distributed contents, since it gives a good result that the values of the characteristic information on editing content tend to be close to those on original one.
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大竹 剛
セッションID: 15-6
発行日: 2003年
公開日: 2004/03/26
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In the content distribution on the broadband network, the rights management and protection against several illegal acts is essential. In this paper, a new method is proposed that extracts the characteristic information of content using multivariate analysis. It realizes identification of illegally distributed content.
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杉本 修, 川田 亮一, 小池 淳, 和田 正裕
セッションID: 16-1
発行日: 2003年
公開日: 2004/03/26
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フリー
To improve accuracy of picture defect detection based on the Reduced Reference framework, the authors study an adaptive control method of threshold level for detecting the local impairment caused by MPEG bitstream errors. The threshold level is adaptively controlled according to the relation between coding noise and optimum threshold level. Since the coding noise can be measured from the image features extracted by the proposed method, the optimum threshold is easily derived and this method enables more precise detection than the conventional scheme that uses a fixed level for the detection threshold.
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宝蔵寺 優介, 木本 伊彦
セッションID: 16-2
発行日: 2003年
公開日: 2004/03/26
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One of MPEG-4 feature is improvement of error tolerance. In this paper ,in case that only DC component is received ,error concealment effect by DC component of DCT is evaluated by using MOS.
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中村 晴幸, 山内 達郎, 西田 泰章, 山崎 順一, 砂崎 俊二, 山元 浩幸, 石田 薫
セッションID: 16-3
発行日: 2003年
公開日: 2004/03/26
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フリー
Conventional converters without motion compensation tend to exhibit double images and other picture-quality problems when handling scenes that contain motion.We develop a compact and lightweight PAL-HDTV standard converter which converts directly between PAL and HDTV.Accurate motion vector detection is achieved by two-way motion detection for smooth transitioning.
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加藤 和明, 趙 亮, 酒澤 茂之, 山本 英雄
セッションID: 16-4
発行日: 2003年
公開日: 2004/03/26
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フリー
In this paper, we propose a reception control method in which video layers are chosen automatically according to the motion in the video. If there is no or little motion, then the client receives layers including high frequency pictures as many as possible (for that purpose, some low frequency layers may be dropped even if the network capacity allows to receive). Experiments show that the proposed method is effective in improving user is impressions.
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友部 修, 石田 隆張, 金久保 貴史, 柴田 巧一, 幸田 恵理子, 春日井 靖
セッションID: 16-5
発行日: 2003年
公開日: 2004/03/26
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フリー
In this paper, we propose an effective multiplexing method of transport stream for the digital broadcasting. Especially for mobile service, it is one of the problems to minimize delay and jitter in the narrow bandwidth in case of transmitting various kinds of the broadcasting data. To solve the problem, we develop a new multiplexing method, that is, it controls the timing of the transport stream transmission. 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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黄 資雅, 大久保 榮, 亀山 渉
セッションID: 16-6
発行日: 2003年
公開日: 2004/03/26
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フリー
Talk-back and talk-together TV system will enhance current experiences with TV. In this paper, case study on talk-together TV system is given. Scenario description, parameters and required functions for system implementation are detailed here.
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塩寺 太一郎, 松田 一朗, 伊東 晋
セッションID: 17-1
発行日: 2003年
公開日: 2004/03/26
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This paper Proposes an efficient lossless video coding scheme based on motion compensation and 3D prediction. Not only predictors but also motion vectors are iteratively optimized for each frame so that a coding rate of prediction errors can have a minimum. Simulation results indicate that coding rates of the proposed coding scheme are 0.9-2.5 bits/pel lower than those of a JPEG-LS-based intra-frame coding scheme.
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山田 悦久, 関口 俊一, 加藤 嘉明, 浅井 光太郎
セッションID: 17-2
発行日: 2003年
公開日: 2004/03/26
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We studied about the coding efficiency for MPEG-4 AVC to HDTV. The experimental result using JM6.1e shows that the control of the bit allocation for the whole sequence and for each picture type is more complicated than the existing video encoding method like MPEG-2. And the control for the improvement in subjective quality of image is also difficult.
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松尾 賢治, 高木 幸一, 小池 淳, 松本 修一
セッションID: 17-3
発行日: 2003年
公開日: 2004/03/26
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フリー
This paper proposed two techniques that can improve coding efficiency in the enhancement layer of FGS. First is a method to decide the dynamic range of residue with reference to the base layer and to cut down the number of bits being candidate for coding. Second is a method to code binary symbols as they are, at lowest bit plane where coding efficiency becomes especially worst, and not to output marker codes of MPEG-4. Proposed method can improve the coding efficiency of conventional FGS by about 2%.
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茂出木 敏雄
セッションID: 17-4
発行日: 2003年
公開日: 2004/03/26
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We are developing a multimedia lossless encoder software tool, which can compress high-quality audio, video and still image data used in multimedia content productions. This paper describes the feature of our proposed lossless compression algorithm and presents several encoding experimental results using our prototype encoder software tool.
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橋本 真幸, 松尾 賢治, 小池 淳
セッションID: 17-5
発行日: 2003年
公開日: 2004/03/26
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フリー
This paper proposes an effective JPEG2000 encoding method for reducing tiling artifacts. The proposed method consists of two basic algorithms: (1) an algorithm that estimates the amount of code of each tile, and that allocates bits according to the prediction, and (2) an algorithm that predicts occurrence of the tiling artifacts and that locally improves quantization accuracy. These encoding methods require no additional processing in the decoder. In the experiment, it was subjectively confirmed that tiling artifacts were greatly reduced.
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酒澤 茂之, 滝嶋 康弘, 中島 康之, 和田 正裕
セッションID: 17-6
発行日: 2003年
公開日: 2004/03/26
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フリー
A direct watermarking method on MPEG video bitstream is investigated. A conventional method that embeds watermarks on YUV uncompressed video data is applied to DCT coefficients in the MPEG video bitstream. First, an impact on picture quality according to embedding intensity that is a parameter of DCT coefficients alteration is evaluated. Then, watermark resilience to MPEG re-encoding and filtering attacks is tested. A computer simulation shows that the direct watermarking method can retrieve embedded 80 bits from an attacked video data, however its reliability is lower than the conventional method.
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藤井 亮介, 馬養 浩一, 和田 稔, 伊藤 浩, 鈴木 光義
セッションID: 17-7
発行日: 2003年
公開日: 2004/03/26
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フリー
An MPEG-2 stream oriented real-time watermark system is reported in this paper which is included in a research project for the analogue copy tolerant watermark methodologies consigned by the TAO, Telecommunications Advancement Organization of Japan. The watermark is embedded without full decode of MPEG stream but on the layer separated MBs or blocks modified on their DCT components.
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野上 高, 角田 貢, 吉村 太志, 河野 正晴
セッションID: 17-8
発行日: 2003年
公開日: 2004/03/26
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フリー
A steganography application on the image hiding based on Karhunen Loeve Transform is considered. The application requires a large amount of embedded watermark information. In this paper, a multi-level information decoding by discriminant analysis from a single pixel of embedded watermark image is proposed, though a binary watermark image is embedded into a cover image in our previous work.
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森田 栄治, 野上 高, 角田 貢
セッションID: 17-9
発行日: 2003年
公開日: 2004/03/26
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フリー
A method for secret message exchange by the characteristic of Image hiding based on Karhunen-Loeve Transform (K.L.T.) is proposed. The conventional Steganography is takes into consideration by only one way communication. Then, the new scheme of the secrecy message exchange, which used Stego-image in used as Cover-image again is proposed. Concretely, character that watermark exchanging of image hiding by K.L.T. changes color of a Stego-image mainly is used. And its validity of the proposed method a technique is also shown by the results from computer simulation.
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大橋 俊夫, 小沢 慎治
セッションID: 17-10
発行日: 2003年
公開日: 2004/03/26
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フリー
As for digital watermarking corresponding to printing of a color image , the rate of detection is not stabilized with various kind of picture, resolution level, and printing picture size. So, we aim at stabilization of the rate of watermark detection in various conditions by pretreating image before embedding.
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相賀 崇昭, 吉田 哲雄, 村崎 出, 村山 研一
セッションID: 18-1
発行日: 2003年
公開日: 2004/03/26
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フリー
We have developed ISDB-T Compact Type TTL System for the Terrestrial Digital Broadcasting Network. It's system consists of a multi-wave duplexer, a 0.5W-amplifer in 7GHz-band, and a receiver with AGC. We investigated the method of improving Interference Reduction Factor. This paper describes the result of testing the equipment.
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村山 研一, 西村 昌一, 煙草 英一, 坪倉 勇
セッションID: 18-2
発行日: 2003年
公開日: 2004/03/26
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フリー
We have developed a multiplexer for digital STL(Studio to Transmitter Link) / TTL(Transmitter to Transmitter Link) of Terrestrial Digital Broadcasting Network. This paper describes about measured performance of the developed multiplexer.
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村崎 出, 西村 昌一, 村山 研一, 吉田 哲雄, 富樫 純一
セッションID: 18-3
発行日: 2003年
公開日: 2004/03/26
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フリー
We have developed ISDB-T Compact Type TTL System for the Terrestrial Digital Broadcasting Network. Its system consists of a multi-wave duplexer , a 0.5W-amplifer in 7GHz-band .And also we could miniaturize 1/4 scale of current model transmitter.
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山崎 正明, 築地 武彦
セッションID: 18-4
発行日: 2003年
公開日: 2004/03/26
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A parallel branch wire element is attached parallel to the antenna element works as a short-circuited coaxial stub used as a loadings element of the antenna.In this paper, the square loop antenna with the parallel branch wire is analyzed. The input impedance and the resonant frequency were obtained by using the moment method for the analysis.As a result, the operation and the effect of the parallel branch wire were clarified. And, the resonant frequency of the square loop antenna was able to be reduced up to 47% by the parallel branch wire.
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佐藤 佑也, 住広 尚三, 佐藤 源貞
セッションID: 18-5
発行日: 2003年
公開日: 2004/03/26
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フリー
In a Four-Circular Loop Antenna with a reflecter,it investigated about input impedance,radiation pattern,and power gain.It arms at development of the antenna to acquire the following features in a wide frequency range.1.Input impedance adjustment can be easily taken.2.It is high power gain.3.When multiple arrangement is carried out,horizontal radiation patterns become omnidirectional pattern.
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山口 惣一郎, 江頭 茂
セッションID: 18-6
発行日: 2003年
公開日: 2004/03/26
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This short theses is on the maximum band width available with gain,from 2L to 10L types of "Ladder Antenna" for receiving UHF-DTTB (Digital Terrestrial Television Broadcasting). It's designed optimum dimensions are calculated according to the simulated results made by the moment method.This antenna has a structure of directly stacked multi full-wavelength quadrangle loops with a reflector.
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笹野 耕治
セッションID: 18-7
発行日: 2003年
公開日: 2004/03/26
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フェージングが軽減されて無指向性を有するターンスタイルアンテナを提案する。3素子ヤギアンテナの導波器と反射器を同じ長さとし、それを2基90位相差給電してタースタイル構造をもたせた。 水平指向性はー9.6dBの落ち込みであるが、90度角度を変えてスタックすると改善される。
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斉藤 瓊郎, 大石 剛史, 浅川 恵一
セッションID: 18-8
発行日: 2003年
公開日: 2004/03/26
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To solve the problem that we can use the Off-set Grid Parabora Antenna what is needed for SFN(Single Freqency Network) of digital terevision broadcast on terrestrial under the condition on snow-field,we did the experiment with snow resistant and wind resistant of the Off-set Grid Parabora Antenna on the dummy weight condition and on the snow-field condition,and we get the good result.
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都竹 愛一郎, 永塚 守, 三浦 龍
セッションID: 19-1
発行日: 2003年
公開日: 2004/03/26
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Research and development of the stratospheric platform (SPF) has been aggressively pursued. SPF is useful for wireless communications, broadcasting and scientific observations. Although stably control of the SPF is difficult by means of strong wind in the stratosphere. In this paper, we described the wind velocity in the stratosphere, and proposed new operation method of the SPF.
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藤井 勝之, 伊藤 公一, 田島 茂
セッションID: 19-2
発行日: 2003年
公開日: 2004/03/26
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フリー
Studies of wearable computers have attracted public attention in these days. And one of the area of interest is the communication system adopted in those wearable computers. As anexample, wearable devices which use the human body as a transmission channel, have been developed. This communication system uses near field region of the electromagnetic wave generated by the device which is eventually coupled to human body by electrodes. However, little is known about the transmission mechanism of such devices in the physical layer. In this paper, we proposed calculation model of the transmitter attached to the arm of whole body in radio anechoic chamber using the FDTD method. From this model, we estimated the electric field distribution around the human body.
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川上 智朗, 淺津 博昭, 西村 智博, 香川 景一郎, 太田 淳, 布下 正広, 渡辺 國広
セッションID: 19-3
発行日: 2003年
公開日: 2004/03/26
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We have developed a new vision chip for optical wireless communication systems. The vision chip can detect the positions of communication terminals and receive optical signals from multiple terminals concurrently by use of an image senser mode and a communication mode, respectively. We have designed and fabricated a 50x50-pixel vision chip in a standard 0.35 micro meter CMOS technology. We have verified the communication speed of 50 Mbps Mbps and transimpedance gain of about 320 kilo ohm.
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中川 孝之, 池田 哲臣
セッションID: 19-4
発行日: 2003年
公開日: 2004/03/26
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We describe mathematical expressions on a delay profile measuring method which utilizes M-sequence and digital correlation technique. We also show that averaging of the received signal and over-sampling correlation can improve the dynamic range and the time delay resolution respectively.
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高橋 宏幸, 中村 充, 伊丹 誠, 伊藤 紘二
セッションID: 19-5
発行日: 2003年
公開日: 2004/03/26
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It is necessary for an OFDM receiver to synchronize to the desired carrier frequency precisely after power on, and to track the change of frequency continuously. Therefore, it requires stable synchronization method.In this paper, a method of carrier frequency synchronization using scattered pilot symbols. Better characteristics were confirmed by computer simulations.
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峯原 護, 伊丹 誠, 伊藤 紘二
セッションID: 19-6
発行日: 2003年
公開日: 2004/03/26
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In OFDM transmission, it is difficult to improve performance by equelization it influence of multipath is severe become of frequency dips. In this paper, data spreading OFDM combined Alamouti scheme is proposed. As the results of simulations, improvement of performance under severe Rayleigh fading environment was confirmed.
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京面 公士, 伊丹 誠, 伊藤 紘二
セッションID: 19-7
発行日: 2003年
公開日: 2004/03/26
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In the communication systems using OFDM, it is necessary to compensateinfluence of frequency selective fading caused by multi-path. We propose an MAP data reconstruction from the data symbols spread in frequency domainPerformance of the proposed scheme is examined by computer simulation and good performance is confirmed.
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安藤 嘉高, 神原 浩平, 中原 俊二
セッションID: 19-8
発行日: 2003年
公開日: 2004/03/26
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A relay system with equalization and symbol decision techniques has been developed to overcome the accumulation of deterioration signals in multi-stage relay routes. The CN ratio of the output signal of this system is beyond 40dB. Performance of this system against the multipath was measured in indoor experiments. The result of measurements shows that this system is significantly useful for broadcast wave multi-stage relay.
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神原 浩平
セッションID: 19-9
発行日: 2003年
公開日: 2004/03/26
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In mobile reception of Digital Terrestrial Broadcasting, receiving performance deteriorates by influences of multi-path fading. We developed a diversity receiving system to improve receiving performance. The system combines outputs of 4- branch antennas to maximize SN ratio. The performance of the system was experimentally measured in both indoor and outdoor. The result showed the efficiency of the system and realizability of mobile HDTV reception in urban areas.
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佐藤 誠, 石田 昌之, 田中 正克, 岡田 直紀
セッションID: 19-10
発行日: 2003年
公開日: 2004/03/26
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The digital terrestrial television broadcasting (DTTB) is scheduled for roll-out by the end of two thousand three (2003) in three
major cities, Tokyo, Osaka, and Nagoya. In DTTB, it is important to detect a receiving margin state. We developed the portable equipment
that can automatically measure the margin state of reception for each channel. And also can detect the receiving bit-error-rate by the usual
broadcast ing. This system can be used effectively when DTTB will be started.
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佐々木 正明, 間瀬 光人, 川人 祥二, 田所 嘉昭
セッションID: 20-1
発行日: 2003年
公開日: 2004/03/26
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A resent definition of the SNR for wide dynamic range image sensor is
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川人 祥二
セッションID: 20-2
発行日: 2003年
公開日: 2004/03/26
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This paper describes active pixel sensor circuits using an inverting amplifier for their applications to high-speed image sensors with a global shutter and time-of-flight (TOF) range CMOS image sensors. The negative feedback using the inverting amplifier is useful for achieving high-speed and high-efficiency signal charge transfer in the pixels, leading to low noise signal detection in high-speed sensor pixels, and high-resolution TOF range imaging. The performance of the active pixel circuits for high-speed and TOF range sensors are analyzed.
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間瀬 光人, 佐々木 正明, 川人 祥二
セッションID: 20-3
発行日: 2003年
公開日: 2004/03/26
会議録・要旨集
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In this paper, we propose a method to expand a dynamic range usingdigital integration and a multiple resolution A/D converter. Short accumulated signals are read out for multiple times, and integrated with digital memory in order to reduce the SNR dip. To do this, a high-speed, high-resolution A/D converter is necessary at the column of the image sensor. The multiple-resolution A/D converter is suitable for the column parallel A/D converter. Simulation results show that the proposed approach has a sufficient SNR.
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