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22.34
Displaying 1-12 of 12 articles from this issue
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Article type: Cover
Pages Cover1-
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (17K) -
Article type: Index
Pages Toc1-
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
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Syunji NAKAHARA, Masayuki TAKADA, Kenich TSUCHIDA, Toru KURODAArticle type: Article
Pages 1-6
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe transmission method for Digital Terrestrial Television Broadcasting has been proposed to use OFDM (Orthogonal Frequency Division Multiplexing) in Japan. OFDM has robustness against multi path distortions compared with other digital modulation schemes. Nevertheless, 64QAM modulated OFDM signals considerably degrade in the presence of strong multi path distortion. This paper proposes tow methods of soft decision decoding of 64QAM-OFDM. The proposed methods make use of the channel estimation of each OFDM carriers, consequently show powerful performance.View full abstractDownload PDF (614K) -
Kenichi Tsuchida, Naohiko Iai, Toru KurodaArticle type: Article
Pages 7-12
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSA Terrestrial Integrated Services Digital Broadcasting (ISDB-T) system has been developed for digital terrestrial television and sound broadcasting. An OFDM (Orthogonal Frequency Division Multiplexing) scheme is used to provide robustness against multipath and fading interference. In ISDB-T, a narrow-band OFDM, which has a bandwidth of 432kHz, is used for terrestrial digital sound broadcasting. This paper describes transmission performances of narrow-band OFDM based on laboratory tests using a prototype equipment. A relationship among information bit rate, modulation of OFDM carriers and error coding rate of convolutional code is discussed, and required CN ratio for various parameters under multipath interference conditions is studied.View full abstractDownload PDF (571K) -
Kouchiro IMAMURA, Naohiko IAI, Kazuhiko SHIBUYA, Makoto SASAKIArticle type: Article
Pages 13-18
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDevelopment of SFN is a necessary for the introduction of DTTB in Japan. But the coupling disturbance from transmitting antenna to receiving antenna is a severe problem in relay station. For this step, we have made a equipment to measure the coupling. The measuring method which we had developed for this equipment makes it possible to observe a long term behavior of the coupling in addition to continual measurement in a short span. Now, measurement at Tomakomai relay station in Hokkaido have been carried out by the equipment. The data which is including coupling variation in a day suggest that reflection from surroundings should be considered in a design of a coupling canceler.View full abstractDownload PDF (593K) -
Kenzo MuroiArticle type: Article
Pages 19-24
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSThe xVIII Olympic Winter Games Nagano 1998 commenced on February 7. 1998 centering Nagano City for total of 16 days. resulting with a remarkable success. In this paper, I would like to comment on the comparative features of the Nagano Olympic to the previous Olympics as well as explaining the various duties such as pre- and post- unilateral transmissions unique to the Olympics compared to common sports broadcasting, and finally note the neccesary technical preparations before the Olympic broadcasting began.View full abstractDownload PDF (650K) -
Takashi MiyamotoArticle type: Article
Pages 25-30
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESS -
[in Japanese]Article type: Article
Pages 31-34
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESS -
Hiroyuki Tamaki, Tosiji KobayasiArticle type: Article
Pages 35-40
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSIn the XVIII Olympic Winter Games Nagano in 1998,we produced international signals as the host broadcaster We would like to here about International Signals Production at Alpine Skiing Men's Downhill venueView full abstractDownload PDF (639K) -
Hitoshi Mase, Michihiko Hayashi, Tomomi FukazawaArticle type: Article
Pages 41-44
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSWe developed the world's first air compressed rail track tube allowing the 5 axis camera to curve around 3 corners of the speed skating rink. This system assured the camera to follow and lead the speed skaters resulting with dynamic shots for the Nagano Olympic Games 1998.View full abstractDownload PDF (771K) -
Noriaki KUMATAArticle type: Article
Pages 45-48
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSFor Hi-vision broadcasting, NHK mobilized nine broadcasting vehicles, 100 cameras and 92 VCRs to cover a total of 50 events in seven categories at the 18th Winter Olympic Games at Nagano. This paper reports on triple-speed super slow system, WL cameras, ultra small cameras, VCR integrated cameras, as well as a 1.5Gbps optical multiplex HV transmission system for sending signals between Nagano and Tokyo and a 42-inch HV plasma display system.View full abstractDownload PDF (520K) -
Article type: Appendix
Pages App1-
Published: June 19, 1998
Released on J-STAGE: June 23, 2017
CONFERENCE PROCEEDINGS FREE ACCESSDownload PDF (76K)
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