ITE Technical Report
Online ISSN : 2424-1970
Print ISSN : 1342-6893
ISSN-L : 1342-6893
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25.31
Displaying 1-8 of 8 articles from this issue
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  • [title in Japanese]
    Article type: Cover
    Pages Cover1-
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_Cover1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Index
    Pages Toc1-
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_Toc1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • Feasibility Experiments on Simultaneous HDTV and Mobile- terminal Broadcasting using Hierarchical Transmission by ISDB-T.
    Kiyoyasu ANDO, Naoki HAYASHI, Hidekazu TANAKA, Yoichi HIGASHI, Yukio K ...
    Article type: Article
    Session ID: BCS2001-10
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_1
    CONFERENCE PROCEEDINGS FREE ACCESS
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    ISDB-T enables multiple programs to be broadcast according to the purpose at hand using hierarchical transmission. With the objective of using this capability in actual broadcast services, we have performed experiments that set up two layers within one 6-MHz channel, one for HDTV stationary reception and the other for mobile reception. This is possible because high compression efficiency 720p is used for HDTV broadcast. In the experiments, We first examined mobile reception in urban areas and determined the parameters that would make it workable, and then performed two-layers transmission consisting of "HDTV including data broadcasts" and "mobile-reception broadcasts, " confirming that actual services could be achieved in this manner.
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  • An Application of Diversity Combining Techniques to Broadcasting Wave Relay Station for ISDB-T
    Syunji Nakahara, Hiroyuki Hamazumi, Kazuhiko Shibuya, Makoto Sasaki
    Article type: Article
    Session ID: BCS2001-11
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_7
    CONFERENCE PROCEEDINGS FREE ACCESS
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    It is necessary for the relay of the digital terrestrial broadcasting that the signal performance isn't made to deteriorate. This paper proposes that applications of the diversity combining technique to the broadcasting wave relay to secure the signal performance. The techniques apply diversity combining to every career of OFDM(Orthogonal Frequency Division Multiplexing)for the reception of the relay station. The proposed technique makes signal delay in a relay small, and improves the signal characteristic better compared with an equalizer.
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  • A Study of MPEG-2 Low Bit Rate Coding by Adaptive Selection of Picture Structure
    Masaaki Kurozuumi, Kikufumi Kanda, Tomohiko Sugimoto, Eisuke Nakasu, Y ...
    Article type: Article
    Session ID: BCS2001-12
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_13
    CONFERENCE PROCEEDINGS FREE ACCESS
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    A higher efficient HDTV coding technique is desired to enrich the services of the digital broadcasting. In the MPEG-2 video coding, which is commonly used for digital broadcasting, generally a motion vector rate is constant and not related to the coding bit rate. At the lower bit rate, the ratio of motion vector rate is generally high and the quantizer scale becomes large to reduce the DCT coefficient rate. To improve picture quality at the lower bit rate, the motion vector rate should be suppressed. This paper describes the effect on picture quality improvements by an adaptive picture structure coding method based on the vertical frequency level in a frame.
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  • A Study of Pre-Filtering in the MPEG-2 Video Coding
    Yoshimichi Ohtsuka, Tomohiko Sugimoto, Kikufumi Kanda, Masaaki Kurozum ...
    Article type: Article
    Session ID: BCS2001-13
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_19
    CONFERENCE PROCEEDINGS FREE ACCESS
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    BS digital broadcasting has been started since December 2000. The four frequencies were newly allocated to Japan in addition to the currently used eight frequencies for the BS broadcasting. Broadcasting via a communication satellite at 110 degrees of east longitude has been standardized in the same technical specifications as the BS digital broadcasting. The standardization of terrestrial broadcasting has been completed, and its broadcasting is just prepared on business. In this background, aiming the realization of digital HDTV broadcasting at the lower bitrates, we are studying the improvements on the coding algorithms at the encoder without changing the current MPEG-2 receivers. In this study, we have started research on a pre-filtering. This paper describes the structure of this hardware.
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  • [title in Japanese]
    Article type: Appendix
    Pages App1-
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_App1
    CONFERENCE PROCEEDINGS FREE ACCESS
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  • [title in Japanese]
    Article type: Cover
    Pages Cover2-
    Published: March 23, 2001
    Released on J-STAGE: June 23, 2017
    DOIhttps://doi.org/10.11485/itetr.25.31.0_Cover2
    CONFERENCE PROCEEDINGS FREE ACCESS
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