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Displaying 1-22 of 22 articles from this issue
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Article type: Cover
Pages Cover1-
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (12K) -
Article type: Index
Pages Toc1-
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (64K) -
Hiroki OHTAArticle type: Article
Session ID: BCT2012-60
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe signal bandwidth is 5.57MHz(6MHz^* 13/14) in the channel of digital broadcasting, and the distance resolution 54m of the delay profile. The transfer functions of two or more of digital broadcasting channels were connected, an equivalent signal band expanded, and it examined it concerning the technology that improved the analytical accuracy of the propagation property. In this paper, we examined the adjustment condition of the phase to connect the signal bands.View full abstractDownload PDF (866K) -
Akira NAKAMURA, Kohei OHNO, Makoto ITAMIArticle type: Article
Session ID: BCT2012-61
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn mobile reception of uplink OFDM signal, the performance is deteriorated because of ICI (Inter-Carrier Interference) caused by Doppler-spread of the channel as in the case of downlink. Especially, OFDMA (Orthogonal Frequency Division Multiplexing Access) uplink system, the influence of ICI is different in each user block. Therefore, the ICI cancellation technique in the base station for the uplink OFDMA signal is necessary. In this paper, ICI canceller for uplink OFDMA signal is proposed. The channel matrix considering the influence of ICI in each user is calculated. However, the inverse of the channel matrix cannot be calculated because the diagonal elements of the channel matrix are zero because of Null subcarriers. In proposed scheme, "1" is substituted to the diagonal element of zero corresponding to Null subcarriers of the channel matrix and the pseudo channel matrix is generated. The inverse of pseudo channel matrix is multiplied to the received signal. It is confirmed to that reduction of the influence of ICI using the proposed channel matrix.View full abstractDownload PDF (532K) -
Takayuki NAKAGAWA, Fumiki UZAWA, Kazuhiko MITSUYAMA, Tetsuomi IKEDAArticle type: Article
Session ID: BCT2012-62
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSFeasibility study on a frequency reallocation of Field Pick-up Unit (FPU) system from 700-MHz band to 1.2-GHz or 2.3-GHz band is being carried out. The authors developed 2x2 STTC-MIMO-OFDM system for the new frequencies, revised the transmission equipment, and improved the performance. Using this system, field tests on various road racing courses were conducted. In this report, from the Lake Biwa Marathon course trials, test results on high altitude reception with an outside broadcast van (transmitter) moving in urban area are described.View full abstractDownload PDF (604K) -
Madoka NAKAMURA, Yoshikazu NARIKIYO, Hitoshi SANEI, Masahiro OKANO, Ma ...Article type: Article
Session ID: BCT2012-63
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSAfter analog television broadcasting was terminated in Japan, the frequency bands from 90 to 108 MHz (VHF-Low band) was reallocated to mobile multimedia broadcasting (VHF-Low MMB). We propose three methods (the extended time-interleaving length, iterative decoding technology, and space diversity reception technology) to improve the mobile reception performance. And the improvements of the mobile reception performance were evaluated through laboratory and field experiments. As a result of laboratory experiments, the extension of time-interleaving length from I=4 (0.5 s) to I=32 (4 s), iterative decoding, and 2-branch space diversity reception improved the mobile reception performance by 8.9 dB at a vehicle speed of around 30 km/h. We conducted field experiments, and the results from these matched those from the laboratory experiments.View full abstractDownload PDF (672K) -
Kenichi MURAYAMA, Makoto TAGUCHI, Takuya SHITOMI, Shingo ASAKURA, Kazu ...Article type: Article
Session ID: BCT2012-64
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSNHK is conducting research on the next generation of digital terrestrial broadcasting using UHF band to enable large-volume content services such as Super Hi-Vision. We have reported our prototype system applying dual polarized MIMO and ultra multi-level-OFDM. We have conducted field experiment to send compression-coded Super Hi-Vision signal by applying the bulk transmission scheme using two television channels in the UHF band. This paper describes the details of the prototype system and the field experiment.View full abstractDownload PDF (751K) -
Hidefumi YASUDAArticle type: Article
Session ID: BCT2012-65
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe 'flip-board' is popular item in TV program. Almost all 'flip-board' is made by paper. But these are dust after using TV show. It's waste. So, we tried to replace its to digital one. We realize touch-panel system with very low cost. Because we use popular tools (ex.Adobe Flasd) for OA Systems. And cut off a safety margin of running cost. It's very tight situation but if the user can use very carefully, they get a good system with low costs.View full abstractDownload PDF (850K) -
Katsuma KODERA, Tetsuo MAKINOArticle type: Article
Session ID: BCT2012-66
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn recent years, the concern over electricity shortages has underscored the importance of environmentally conscious lighting design. While LED technology presents a solution, research efforts have yet to produce a LED solution compatible with existing dimmer systems, preventing the industry wide adoption of LED technology. At Nippon Television, we have designed and developed "LED Floodlight", a LED electric drive system that produce smooth variable lighting while seamlessly connecting with existing dimmers. In addition to minimizing costs through the use of generic LED panels, our technology greatly contributes to an environmentally sustainable future.View full abstractDownload PDF (685K) -
Haname ARAI, Kanji HATADAArticle type: Article
Session ID: BCT2012-67
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe storage batteries are prepared in small-powered repeater of terrestrial DTV as a reserve power supply at the time of a power failure. In Hokkaido, there is a small-powered repeater of terrestrial DTV where temperature falls to minus 30 degrees outside in winter. There is a possibility that the discharge possible hour will be short by low temperature and be discharge impossibility by very-low temperature for storage batteries. Then, some experiments and analyses were carried out about the technique of easing the temperature fall of the storage batteries using regenerating agents. Moreover, the ventilation improvement of the batteries accommodation box corresponding to the temperature change in summer and winter is also reported.View full abstractDownload PDF (960K) -
Hideaki KIMATA, Yoshie YAMAGUCHI, Hajime NOTO, Katsuhiko FUKAZAWA, Aki ...Article type: Article
Session ID: BCT2012-68
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSTo enjoy the event scene, the effect of the fun by direction of manipulating and switching cameras work is essential, in addition to increasing the presence by high-quality video and audio. Movie direction in TV broadcasting is made for the public, however, it is desirable to match the tastes of the individual viewer if possible. In this paper, we propose a video distribution system to achieve the performance that is personalized for individual audience. On the assumption that viewers can enjoy the video contents in conjunction with the TV broadcasting, the total system was examined from shooting to viewing. In addition to the traditional multi-angle viewing, we propose a method such as a scenario based panoramic video viewing.View full abstractDownload PDF (848K) -
Tsukasa KAKINUMAArticle type: Article
Session ID: BCT2012-69
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn the exhibition of "The Inka Empire Revealed," held at National Museum of Nature and Science, Ueno, Tokyo, between March and June 2012, a screening of Stereoscopic 3D movie of 4K on the 13-meter-wide screen named "3D Sky View Theater", was well received. In this movie, we realized the appearance of prosperity and the current figure of Machu Picchu. 3D previsualization was used in the production of this content, which was the application of the technology of virtual studio system to be used in broadcast program production. And also a wealth of experience to use monitors and projectors in the sets of TV show has been utilized in the theater design and construction. A number of new attempts by the application of broadcast technology has been made.View full abstractDownload PDF (828K) -
Naoto KOGO, Masahiro YATAGAI, Fumihiro MURAKAMI, Tetsuomi IKEDAArticle type: Article
Session ID: BCT2012-70
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe study on the transmission antennas to achieve more stable transmission of 700MHz band FPU used in the road race live broadcast. Considering the locations of the course and receiver base stations, we have already evaluated an array antenna for the transmitter to create a narrow beam configuration in the course at Kyoto. In this report, we evaluated a parameter of the array antenna in Lake Biwa Mainichi Marathon to improve the cover area of the receiving stations. We confirmed the stability of video transmissions by analyzing and evaluating the propagation data by choosing a proper parameter of the transmission antenna.View full abstractDownload PDF (662K) -
Susumu NAKAZAWA, Masafumi NAGASAKA, Shoji TANAKAArticle type: Article
Session ID: BCT2012-71
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSNHK Science and Technology Research Laboratory is researching and developing satellite broadcasting system using 21-GHz band to broadcast Super High-Vision programs. It is required for the antennas onboard a broadcasting satellite that the gain of the antenna is ensured constant inside the service area as well as the side robes are suppressed outside, and that the radiation pattern is tolerant of temperature changes occurred in the space environment. We prototyped an engineering model of the onboard shaped reflector antenna for 21-GHz band satellite broadcasting. In this report, we evaluated the electrical performances of the engineering model antenna in thermal vacuum condition.View full abstractDownload PDF (970K) -
Shinichi SUZUKI, Takayuki NAKAGAWA, Tetsuomi IKEDAArticle type: Article
Session ID: BCT2012-72
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe have developed a wireless high-definition TV (HDTV) camera, called the "Millimeter-wave Mobile Camera," which can transmit HDTV pictures with high-capacity and low delay. The camera was improved in transmission capacity and link reliability by the application of 42-GHz band wave and transmitter/receiver diversity, so the camera is extensively used at many TV program productions in outdoor environment such as "Golf tournament" and in indoor environment such as "Charity concert". We recorded the receiving IF (Intermediate Frequency) signals in indoor and outdoor real environment of TV program productions and analyzed the channel characteristics from the receiving IF signals. In addition, we evaluated the differences of channel characteristics between indoor and outdoor environment.View full abstractDownload PDF (757K) -
Koki NIIMI, Shinji SUGIMURA, Aiichiro TSUZUKUArticle type: Article
Session ID: BCT2012-73
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe 13th channel of the DTTB(Digital terrestrial television broadcasting) signal is the lowest frequency in the DTTB and adjacent to wireless communicator signal for taxi on frequency band. Therefore, the 13th channel has a possibility to degrade if wireless communicator for taxi is used near the receiving antenna for DTTB. In this paper, we describe the results of indoor and field experiments. We also mention degradations of the DTTB signal by wireless communicator for taxi.View full abstractDownload PDF (631K) -
Shinji SUGIMURA, Koki NIIMI, Aiichiro TSUZUKUArticle type: Article
Session ID: BCT2012-74
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSOFDM (Orthogonal Frequency Division Multiplexing) is used for DTTB (Digital Terrestrial Television Broadcasting). It is not affected by multipath easily, so SFN (Single Frequency Network) is possible. However, it is affected in worse reception environment. Therefore, estimating the cause of degradation is useful for improvement of reception condition. In this paper, we propose a new estimation method in regard to horizontally and perpendicular direction. We describe measurement results of field experiments with proposed method.View full abstractDownload PDF (585K) -
Fumiaki MINEMATSU, Kazuhiko SHIBUYA, Yoshiyuki OBARA, Toru IWASAKIArticle type: Article
Session ID: BCT2012-75
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSInterferences to ISDB-T terrestrial digital TV receptions at home and relay stations by a distant terrestrial digital TV airwave are caused by anomalous radio propagations such as radio ducting. It is often extremely difficult to search the interfering station because the interfering airwave is commonly unstable and easily masked by a desired digital TV airwave. To conduct efficient search of the interfering station, an ISDB-T receiver with a network ID estimation function and an ISDB-T interfering airwave extractor have been developed. In this paper, these equipments are introduced and some results of the performance confirmation tests are also reported.View full abstractDownload PDF (785K) -
Makoto SATO, Kohei KAWAKAMI, Tomoya SUGIMOTO, Satoshi IZUMIDA, Satoshi ...Article type: Article
Session ID: BCT2012-76
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIntroduction of area limited broadcasting is considered by white space of the UHF band for DTTB. On the other hand, in Kanto area, a main station is due to be relocated to Tokyo Sky Tree from Tokyo Tower in 2013. After the relocation, Tokyo Tower will become a reserve transmitting station. From now on, the frequency situation will be complicated. We developed the equipment which can measure the signal of each channel automatically, and it can detect the transmission point of DTTB waves.View full abstractDownload PDF (949K) -
Article type: Appendix
Pages App1-
Published: July 12, 2012
Released on J-STAGE: September 21, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (83K) -
Article type: Appendix
Pages App2-
Published: July 12, 2012
Released on J-STAGE: March 30, 2018
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (83K) -
Article type: Appendix
Pages App3-
Published: July 12, 2012
Released on J-STAGE: March 30, 2018
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (83K)
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