ISDB-Tmm Adopted for Mobile Multimedia Broadcasting in Japan

TOKYO, December 24 - ISDB-Tmm has been adopted as one of the standards for nationwide mobile
multimedia broadcasting in Japan. Broadcasting using this standard is
scheduled to start after July 24, 2011, when analog TV broadcasting will be
closed down. ISDB-Tmm belongs to the ISDB-T family of technologies, and has
been developed based on the same technology as ISDB-T. This technology is
being actively promoted by the ISDB-T Forum, a group made up of approximately
80 Japanese corporations, and thus it is almost certain that the use of
ISDB-Tmm technology for broadcasting will become a reality.

    (Photo: www.newscom.com/cgi-bin/prnh/20091222/ISDB-T-a )
    (Photo: www.newscom.com/cgi-bin/prnh/20091222/ISDB-T-b )

In addition to ISDB-Tmm, other standards adopted for multimedia
broadcasting include ISDB-Tsb and MediaFLO. Broadcasters will choose one of
the standards when they apply for a license. ISDB-Tmm eliminates the need for
a guard band by combining some blocks of 13 segments (5.6 MHz) and several
1-segment formats (1 segment = 0.4 MHz), and can be applied to various
frequency bands. A transmitter for a combination of 33 segments (14.2 MHz)
has already been developed, allowing a significant reduction in transmission
costs. As is clearly shown above, the versatility of ISDB-Tmm enables it to
be applied to a wide range of operating frequency bands, as well as support
spectrum allocations for 7 MHz and 8 MHz bands.

In addition, ISDB-Tmm is highly compatible with the digital terrestrial
television system standard, allowing the sharing of receivers and the
reduction of transmission costs. For these reasons, ISDB-Tmm is considered to
be the ideal multimedia broadcasting system for countries, including those in
South America, that have already adopted ISDB-T as the standard for their
digital terrestrial television system.

About ISDB-T Multimedia Forum

Approximately 80 organizations belong to the ISDB-T Multimedia Forum.

    Contact:
    Hiroaki Haranaka
    ISDB-T Multimedia Forum Head Office
    Tel: +81-3-3539-1785
    Fax: +81-3-3539-1753
    E-Mail: mmf-desk@mmbi.co.jp
    URL: www.isdb-t.jp/
    4F Sanno Park Tower, 2-11-1
    Nagata-cho, Chiyoda-ku, Tokyo 100-6104

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Hiroaki Haranaka, ISDB-T Multimedia Forum Head Office, +81-3-3539-1785, Fax: +81-3-3539-1753, mmf-desk at mmbi.co.jp