ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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25.1
Displaying 1-10 of 10 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • The real-time recording system for DVD camera using 8cm DVD-RAM disc
    Yukio Isobe, [in Japanese], [in Japanese], [in Japanese]
    Article type: Article
    Session ID: MMS2001-1
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    We have developed the DVD camera that is an application of DVD-RAM system standardized at DVD Forum. In this paper, we describe the following features of DVD camera system, Real time video recording, Intermittent driving of DVD-RAM Drive and still picture recording.
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  • Narrow track writing/reading in laser-assisted magnetic recording
    Hiroyuki Katayama, Masaki Hamamoto, Jun-ichi Sato, Kosuke Watanabe, Ku ...
    Article type: Article
    Session ID: MMS2001-2
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Narrow track write/read properties in laser-assisted magnetic recording were investigated by using a TbFeCo magnetic recording film with perpendicular anisotropy. The effect of a smaller size of an assisting beam with a blue laser diode was a focused issue in this study. Thermal simulation results combining the temperature-dependent magnetic properties gave us a good insight into crosstalk canceling function in laser-assisted magnetic recording. Also, the dependence of recorded bit shape on an assisted laser power was well explained by using a macromagnetic simulation regarding bit formation. Thereby the thermal profile in the magnetic recording media was found to be crucial for the narrow track write/read performance in laser-assisted magnetic recording. By adjusting both media properties and the assist laser power, we have demonstrated the possibility of the 100ktpi recording with a narrow track pitch of less than a half of the assisting beam size.
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  • DVCPRO HD Professional Use 1/4" Digital VCR
    Hirofumi Uchida, Yuji Fujiwara, Mitsuhiro Miyashita, Hiroshi Saito, Ke ...
    Article type: Article
    Session ID: MMS2001-3
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    HDTV is expected to be a major TV system in the digital TV broadcasting era. For HDTV news gathering and production, HDTV equipment should have operating capabilities and cost efficiency that is equivalent to conventional equipment for standard TV systems(SDTV). Accordingly, we have developed the DVCPRO HD formart based on the DVCPRO conventional digital VCR for SDTV. In DVCPRO HD, a 1.5 Gbps HDTV video signal is compressed to 100 Mbps by a newly developed algorithm. The compressed video data and 8-ch audio data are recorded on 1/4-inch tape with a total recording rate of 167 Mbps, which is four times higher than that of conventional DVCPRO.
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  • Fast Access for Magnetic Storage in Multi Head System
    Norio SASAKI, Hiroaki MURAOKA, Yoshihisa NAKAMURA
    Article type: Article
    Session ID: MMS2001-4
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_19
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Transfer time simulation in hard disk drive was carried out. Dependence of transfer time on parameters of hard disk drive and shorting of time by multi head system were studied. The relationship between transfer time and rotational speed, average seek time and sector size of hard disk drive was obtained. It was shown that sector allocation for data affected large influence on the transfer time. The result of transfer time of video data by multi head system showed that multi head was effective in the view points of fast access.
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  • Improved Construction and Performance Evaluation of High Rate(0, G/I)Codes
    Hidetoshi Saito, Toshihiko Iga, Yoshihiro Okamoto, Hisashi Osawa
    Article type: Article
    Session ID: MMS2001-5
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_25
    CONFERENCE PROCEEDINGS FREE ACCESS
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    In this report, improvement of high rate(0, G/I)codes and it's performance evaluation are studied. Our new construction method of(0, G/I)code is based on a minimized G constraint. New 32/33(0, 6)and 64/65(0, 8)codes are obtained by using this method. As a result, computer simulation shows that both of these(0, G/∞)codes with E^2PR4ML systems provide the better performance than the conventional 16/17(0, 6/6)code.
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  • The relation between head field gradient and medium noise for perpendicular magnetic recording
    Kenji MIURA, Hiroaki MURAOKA, Yoshihisa NAKAMURA
    Article type: Article
    Session ID: MMS2001-6
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_31
    CONFERENCE PROCEEDINGS FREE ACCESS
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    Dependence of transition noise on writing head field in perpendicular magnetic recording was studied by transition jitter measurement and simulation. By using single-pole type head, Increment of writing current resulted in the depression of transition jitter and less medium noise. Transition jitter was inversely proportional to head field gradient. Sharpening head field gradient was an efficient method in order to reduce the medium noise.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Cover
    Pages Cover2-
    Published: January 18, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.1.0_Cover2
    CONFERENCE PROCEEDINGS FREE ACCESS
    Download PDF (69K)
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