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Article type: Cover
Pages
Cover1-
Published: October 29, 1998
Released on J-STAGE: May 24, 2017
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Article type: Appendix
Pages
App1-_2_
Published: October 29, 1998
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Article type: Index
Pages
3-11
Published: October 29, 1998
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Article type: Appendix
Pages
12-
Published: October 29, 1998
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Atsushi HASE, Yoshinobu OKANO, Koichi ITO
Article type: Article
Pages
1-2
Published: October 29, 1998
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The human body significantly alters characteristics of the antenna, which is used for cellular telephones and similar communication devices. This interaction as well as the resultant deposition of microwave power in the human body is of particular interest for potable radio equipment. Radio wave induces the current inside the human body, whose heat evolution action causes the biological effects. For the evaluation measures, Specific Absorption Rate(SAR) is used. In this paper, Measurements by the thermographic method using an infrared-camera and Tissue Equivalent Phantom is introduced to estimate the SAR in the human head exposed to microwave sources.
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Norio AOYAGI, Shin-ichiro MATSUZAWA, Koichi ITO
Article type: Article
Pages
3-4
Published: October 29, 1998
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Recently, the demand for the mobile satellite communication is increasing, and many communication services are in the planning stage. Various types of vehicle antennas which can track the satellite have been studied. In this paper, we chose the circularly polarized slot antenna. We have described the beam-switching printed array antenna at 2.6GHz-band.
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Noboru ONO, Yasuhiro OKADA, Yoshikazu YOSHIDA
Article type: Article
Pages
5-6
Published: October 29, 1998
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The digital satellite broadcasting in JAPAN was started by JCSAT-3 (128 degree of east longitude) in October, 1996. Another digital satellite broadcasting will be started in April, 1998 by JCSAT-4 (124 degree of east longitude). The angle of orbital separation between JCSAT-3 and JCSAT-4 is 4 degrees. We've developed the essential technologies of "Overlap-Dual-Feed" and "Feed-Cap with Protrusion" for Dual Beam Antenna. We've completed design of a small size (Diameter=40cm) Dual Beam Antenna to receive services by both JCSAT-3 and JCSAT-4 ("JCSAT-3/JCSAT-4-DBA").
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Tetsuya YAMADA, Kazuyoshi SHOGEN
Article type: Article
Pages
7-8
Published: October 29, 1998
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Masaaki YAMASAKI, Takehiko TSUKIJI
Article type: Article
Pages
9-10
Published: October 29, 1998
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In this paper, the monopole antenna loaded by a short-circuited coaxial stub is analyzed. The moment method has been used to calculate the input impedance, resonant frequency. Practical design parameters to optimize the antenna size and impedance matching for the loaded monopole antenna are presented.
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KOUJI SASANO
Article type: Article
Pages
11-12
Published: October 29, 1998
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This contribution reports the HORIZONTAL CHARACTERISTICS OF TURN-STILE-ANTENNA (T) on the car roof top. The Results of mobile reception of TV-DATA-BROADCASTING/MPX-ON-AUDIO show that T ANTENN is suitable for digital signal.
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T. ONZUKA, H. NISHIKAWA, M. TOZAWA
Article type: Article
Pages
13-14
Published: October 29, 1998
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This Paper Describes Technology Of Analogue/Digital Channel Combiner For Using Existing Analogue Common Antenna System
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Mayuko Yamashita, Masahiro Kuwabara, Makoto Itami, Kohji Itoh, Hiroki ...
Article type: Article
Pages
15-16
Published: October 29, 1998
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In this paper, a pilot symbol assisted equalizer that directly estimates complex attenation factor and delay time of multipath is proposed. It is bit error rate characteristics under various multipath environments are analized by computer simulations. As the results, better performance of the proposed equalizer is confirmed.
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Hiroki OHTA, Makoto ITAMI, Aiichiro TSUZUKU
Article type: Article
Pages
17-18
Published: October 29, 1998
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Under the mobile condition, the signal quality degrades seriously by frequency selective fading and Doppler shift, because under that condition, carriers in OFDM(Orthogonal Frequency Division Multiplex) can not be kept the orthogonality by these interferences. In this paper, we propose a symbol equalization method for synchronized demodulation with the propagation path characteristics estimated from complex delay profiles calculated from the received pilot signals.
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Mamoru NAGATSUKA, Aiichiro TSUZUKU
Article type: Article
Pages
19-20
Published: October 29, 1998
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For digital terrestrial broadcasting with OFDM, the designing method of transmitter systems have to be different from that for the current analog systems. Decline of CN ratio, result of non-linear distortion, could be predicted successfully with the measured AM-AM and AM-PM conversion coefficients.
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Shinya Hatakeyama, Makoto Itami, Kohji Itoh
Article type: Article
Pages
21-22
Published: October 29, 1998
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We have already proposed an OFDM system that spreads data symbols in frequency domain. In this paper, we consider influence of non-linear property of amplifier and bit error performance is analized by computer simulations. As the results, it is confirmed that the bit error performance of the data spreaded OFDM system is better than the convensional OFDM system.
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Yuji HIGUCHI
Article type: Article
Pages
23-
Published: October 29, 1998
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Digital Terrestrial Television Broadcasting will be realized by OFDM(Orthogonal Frequency Division Multiplex) because of the robustness against ghost interference and the realization of SFN(Single Frequency Network). In this paper, the comparison result between SFN and DFN(Double Frequency Network) is described.
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Yasuhide OKUHATA, Toshiyuki TAKEGAHARA, Seiichi AKAISHI, Satoshi OKUDA ...
Article type: Article
Pages
24-25
Published: October 29, 1998
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As terrestrial digital audio broadcasting, DAB of EUREKA 147 system is already put into practice in Europe. We made an experimental system to be able to change the OFDM signal bandwidth of conventional DAB system to the half bandwidth. This paper describes the BER characteristic at each bandwidth in AWGN channel and in 0dB echo channel.
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Makoto Sato, Noboru Taga, Takashi Seki, Yuji Oohashi, Masahiko Sugimot ...
Article type: Article
Pages
26-27
Published: October 29, 1998
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In this paper we report indoor experimental results of co-channel and adjacent-channel interference of NTSC TV signals for 2k and 8k carrier OFDM demodulation. In the experiment we evaluate D/U vs BER(bit err rate) performance of 64QAM. In adjacent-channel interference we describes the effect of audio carrier suppression for IF BPF.
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Atsushi SUMASU, Minoru OKADA, Shozo KOMAKI, Heiichi YAMAMOTO
Article type: Article
Pages
28-
Published: October 29, 1998
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We propose a new frequency offset compensation scheme for OPFDM signals. OPFDM is a class of OFDM whose sub-channels signals are transmitted over the different polarization. The proposed scheme can further compensate for the frequency offset by making use of the cyclostationarity of the OPFDM signals.
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Fumiyasu Suginosita, Toshihiro Nomoto
Article type: Article
Pages
29-30
Published: October 29, 1998
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Elliptic function filters are designed for UHF-band transmitter to meet the requirement of good frequency selectivity and passband transmission characteristics. An eight-pole filter with six imaginary-axis zeros shows the best characteristics.
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Keisuke Harada, Masami Aizawa, Makoto Satoh, Masahiko Sugimoto
Article type: Article
Pages
31-32
Published: October 29, 1998
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OFDM(Orthogonal Frequency Division Multiplexing) is an efficient modulation method for digital terrestrial broadcasting. On the terrestrial transmission, there are severe receiving conditions caused by multipath fading and co-channel interference. In order to improve the receiving performance, we propose an FEC(Forward Error Correction) method for OFDM transmission systems.
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Masahiro Okano, Syunji Nakahara, Makoto Sasaki
Article type: Article
Pages
33-34
Published: October 29, 1998
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At a TV relay station in SFN, transmission characteristic is more or less degraded with the coupling from transmitter to receiver. The degradation is gradually accumulated through cascade relays and in case of large coupling, transmission characteristic results in failure. By controlling the phase of a coupling signal to compensate the distorted spectrum in each station, the degradation can be suppressed to an allowable amount under a certain condition.
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Takaaki Konishi, Hisaya Kato, Kunio Ninomiya, Takehiro Kamada, Kazutos ...
Article type: Article
Pages
35-
Published: October 29, 1998
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We have developed a front-end module with one-chip channel decoding LSI for the US digital terrestrial broadcasting(DTV). The front end module comprises high speed and high performance equalizer and wide dynamic range AGC circuit. This front end module will be adopted DTV receiver.
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Masaya SHIRAKAWA, Syu TOMIYA, Toshiya OTAKE, Yuji HIGUCHI
Article type: Article
Pages
36-
Published: October 29, 1998
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We have developed a FFT LSI for OFDM(Orthogonal Frequency Division Multiplexing) systems. This LSI is a pipelined Fast Fourier Transform processor for 8192 complex data points. This LSI contains all the function required to perform FFT of 8192 complex data points in some 700μS.
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K. Arauchi, K. Enomoto, A. Inoguchi, K. Komuro, H. Nishikawa
Article type: Article
Pages
37-38
Published: October 29, 1998
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NEC develops the digital terrestrial television transmitter and supplies UK. This transmitter is very compact size and has excellent linearity. And this transmitter system is able to keep ERP by one antenna, when another antenna is maintenance.
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Takahiro Okada, Tamotsu Ikeda, Yasunari Ikeda
Article type: Article
Pages
39-40
Published: October 29, 1998
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We have developed a receiver LSI for a terrestrial disital television broadcasting. FFT, viterbi decoder, and RS decoder are included in one chip LSI. The main characteristics are a 361-pin PGA package, 720k gates, 3.3 volt operation, and 1.5W power dissipation.
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K. Goushi, H. Yura, K. Murayama, H. Iwakuni, K. Hanafusa, S. Kawashiri
Article type: Article
Pages
41-42
Published: October 29, 1998
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This paper describes features and outlines of a high efficiency 50kW digital AM radio transmitter. We developed a high efficiency power amplifier and a high efficiency power supply for the transmitter. The measured overall efficiency is over 83 percent at 1.0MHz.
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F MIYAMOTO, K ISHIGURE, K NORITAKE, U KANBE
Article type: Article
Pages
43-44
Published: October 29, 1998
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A study of Electric Power Line in TV Broadcasting feld (1) A study of an impediment and steps (2) A study of measurement techniques and measuring dovlce
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Tadahiko Yoshida, Taizo Kondo
Article type: Article
Pages
45-46
Published: October 29, 1998
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A household VCR is interfered by radio broadcasting at medium frequency when it is placed beside a transmitting tower and it's in playback-mode. This report shows the interference mechanism and method to improve on it.
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Yutaka SHIBATA, Jiro HIRONO, Masayuki ISHIDA, Kazuo TADA, Hiroaki OKAM ...
Article type: Article
Pages
47-48
Published: October 29, 1998
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OFDM is expected to be a suitable modulation method for digital terrestrial broadcasting systems. One of the reasons is that it makes it possible to provide services to an indoor/outdoor portable receiver with an in-built or set-top receiving antenna. For planning of broadcasting services to portable receivers, indoor field measurements in urban areas around Tokyo were carried out. In this paper, the measurement results of signal levels attenuated by external walls, windows and obstacles are described.
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Nobuhiro ARAI
Article type: Article
Pages
49-50
Published: October 29, 1998
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The voltage difference appears between the metallic frame of color LCD and the sheet metal of the equipment installed. This paper reports that the voltage difference contribute to the radiation characteristics.
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T. Takei, K. Fukui, K. Matsuo, F. Yamamoto, S. Murasato, T. Okuda, H. ...
Article type: Article
Pages
51-52
Published: October 29, 1998
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This report describes a large scale Remote Control System for overseas market. This Remote Control System is a turnkey project which includes the design, installation, testing and inspection. CT1 is able to remote totally 11 TV station composend of broadcasting station, relay stations.
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Yusuke Moriyama, Yasuichi Inoue
Article type: Article
Pages
53-54
Published: October 29, 1998
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To facilitate the efficient surveying of TV signal transmission characteristics, a system has been developed to measure the transmission characteristics of each type of image signal by inputting AD-converted optional scanning lines of NTSC signals into a personal computer for processing according to a software program.
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Hirohisa Yamashita, Yuuichi Kimura, Kazuhiko Wakamori, Takeshi Hayashi ...
Article type: Article
Pages
55-56
Published: October 29, 1998
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As for optical wireless LAN, when the communication distance becomes long, the influence by the weather cannot be disregarded. Then, we investigated the influence on optical wireless LAN by measuring the transmission rate in long distance (6.2Km) and medium distance (1.8Km) simultaneously. Moreover, we investigated the influence which the weather exerted on optical wireless LAN. As a result, it was confirmed that the weather hardly influenced if the communication distance was within 2Km and practical use was possible.
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Yuuichi Kimura, Hirohisa Yamashita, Kazuhiko Wakamori, Takeshi Hayashi ...
Article type: Article
Pages
57-58
Published: October 29, 1998
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We demonstrate a 155-Mbps ATM backbone using an optical wireless LAN system is effective for transmission of multi-media data (etc movie). The effective speed of this system maintained at 120Mbps or higher. And we mounted a function on the workstation, in which the network can be altered to a backup line when the optical line speed becomes extremely low. As a result, we can construct high speed ATM backbone using an optical wireless LAN system in long distance (over several kms).
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Yosuke ENDO, Kimiyuki OYAMADA, Shuichi FUJISAWA, Yasuaki NISHIDA, Mana ...
Article type: Article
Pages
59-60
Published: October 29, 1998
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We have developed a new optical transmission equipment for HDTV outside broadcasting using dense wavelength division multiplexing technology. This paper describes the structure of this equipment, the characteristics of optical filter and transmission performance of HDTV signal.
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Hiroyuki Furuta, Masao Yamamoto, Mikio Maeda, Kimiyuki Oyamada, Noboru ...
Article type: Article
Pages
61-62
Published: October 29, 1998
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An optical double-sideband suppressed-carrier(DSB-SC) transmission with amplitude-shift-keying(ASK) external modulation was proposed for fiber-optical transmission of microwave signals. The good results were obtained in the experiments at 13.6GHz, which proved that the scheme could overcome fiber-chromatic dispersion.
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Masao YAMAMOTO, Hiroyuki FURUTA, Mikio MAEDA, Kimiyuki OYAMADA, Noboru ...
Article type: Article
Pages
63-64
Published: October 29, 1998
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This report describes an allowable frequency interval for optical PSK coherent transmission. An optical signal by the direct optical phase modulation occupies wider transmission band width than that by the intensity modulation with a microwave subcarrier. A computer simulation shows that the latter can be received under an adjacent allocation, whereas the former suffers from large penalty.
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Hiroyuki Mizukami, Kazuhide Tamizu, Daini Okajima, Kazuyuki Yokoyama, ...
Article type: Article
Pages
65-
Published: October 29, 1998
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Image signal interference and mutual interference of local oscillators in RF section of a digital CATV receiver which consists of a tuner and a down converter, were described. Frequency response of a band pass filter and output frequency of the RF section should be decided taking account of these interferences.
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Yutaka Kakita, Goh Miyamoto, Masa-aki Iguchi, Moriyoshi Akiyama, Tsuto ...
Article type: Article
Pages
66-67
Published: October 29, 1998
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Experimental results of 256QAM signal transmission by DAVIC 1.0 with cw carrier interference and Composite Triple Beat(CTB) in a transmission line are described. We have obtained the required condition that D/U of a cw carrier interference level is more than 36dB and CTB is less than -50dBc in order to keep BER of less than 1×10^<-4> without forward error correction.
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Moriyoshi Akiyama, Tomotake Sato, Takatoshi Shirosugi, Tsutomu Noda, M ...
Article type: Article
Pages
68-69
Published: October 29, 1998
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We have developed a DAVIC 1.0 based 256QAM modulator/demodulator. An experimental result of their IF and RF signal transmission with noise in a transmission line is described. C/N of more than 32.5dB is required to keep BER of less than 1×10^<g;-4> without forward error correction. This result indicates that about 7dB better C/N is necessary to achieve same performance than that of 64QAM transmission.
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Takayuki Nakagawa, Terumasa Tokumoto, Hironori Yasunaga, Mitsumasa Koy ...
Article type: Article
Pages
70-71
Published: October 29, 1998
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We measured various characteristics on the up-streams of Ehime CATV, such as Carrier to Noise Ratio(CNR), Impulse Noise, Reflection, and Bit Error Rate(BER). After that, over one up-stream, which we recognized as relatively good condition in respect of the measurement results, we transmitted MPEG2 coded video signal by 64QAM. As a result, flawless picture and BER of less than 1×10^<g;-10> (post FEC) were obtained.
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Yuji Nadamoto, Takafumi Ueno, Hiroaki Shimazaki, Yasuhiro Kubo, koso S ...
Article type: Article
Pages
72-73
Published: October 29, 1998
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Since December, '97,digital CS Trial Broadcasting (Transmission Frequency : 12.388GHz, 525p video bit rate : 9Mbps) for 525 Progressive have been started using JCSAT3. In response to the demand for 525p/i digital broadcasting, 525p/i Set Top Box has been developed.
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Takafumi Ueno, Hiroaki Shimazaki, Jun-ichi Komeno, Yuji Nadamoto, Yasu ...
Article type: Article
Pages
74-75
Published: October 29, 1998
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This paper describes a PC type Receiver for 525 line progressive/interlaced scanning (525p/i) digital broadcast. The graphic overlay onto 525p picture has not been realized in a conventional PC receiver. We have achieved PC graphics overlay onto high quality 525p picture as well as 525i picture by implementing Matsushita's proprietary video decoder LSI for 525p/i and a specially designed graphics accelerator. A front-end module is also implemented.
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Hiroaki Shimazaki, Takafumi Ueno, Yuji Nadamoto, Yasuhiro Kubo, Naoki ...
Article type: Article
Pages
76-77
Published: October 29, 1998
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This paper is concerned with the 525p/i video decoder LSI, which has been realized by the development of a Matsushita's proprietary media processor called Media Core Processor and the fast processing microcode for 525p. This LSI can decode 525p/i video bit stream with the 16Mbit external SDRAM, which is the same as in 525i LSI.
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Mikihiko YAMADA, Hirotoshi UEHARA, Shouichi GOTOH, Naoki KURITA, Fumia ...
Article type: Article
Pages
78-79
Published: October 29, 1998
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This paper is concerned with the display control for 525-Line Interlaced/Progressive STB such as frame rate conversion and aspect ratio conversion and with the display control LSI which has been developed.
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Takahiko FUKINUKI, Masaru ARAI
Article type: Article
Pages
80-81
Published: October 29, 1998
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Vertical resolution in vertically-moving scanned pictures is analyzed in the [temporal-vertical] frequency domain. The spectrum inclines (or, rotates) from the vertical frequency axis as they move, with the horizontal frequency axis μ as a pivot. The mechanism that the slowly moving horizontal stripes degrade picture quality seriously and there is a limit in the vertical resolution in interlaced pictures is made clear.
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Masaru ARAI, Takahiko FUKINUKI
Article type: Article
Pages
82-83
Published: October 29, 1998
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Vertical resolution in vertically-moving scanned pictures is measured experimentally by MOS(Mean Opinion Score), based on the analysis in the temporal-vertical frequency domain. It is found that the vertical resolution in interlaced scanning is as little as half of that of progressive scanning.
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Yuzuru Masuya, Hidekazu Fukazawa, Norihito Ouchi, Hiroyuki Shimano, Ry ...
Article type: Article
Pages
84-85
Published: October 29, 1998
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The HDTV Frame Rate Converter can convert different field frequency both 1125/60 and 1125/59.94 with motion compensated interpolation using motion vector, scene change detection and still picture detection.
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H. Yamanoue, M. Emoto, M. Okui, S. Yano, T. Yosida
Article type: Article
Pages
86-87
Published: October 29, 1998
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Studies are in progress to develop stereoscopic television as a potential future broadcast service. In order to promote the studies, the Institute of Image Information and Television Engineers has been working towards the establishment of common assessment conditions appropriate for stereoscopic television systems. A principal work is aimed at producing stereoscopic test materials of 3D HDTV.
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