Tokyo Pilot Experiment Phase Two
Moving towards the introduction of digital terrestrial television
broadcasting, the Tokyo Pilot (Digital Terrestrial Broadcasting Tokyo
Pilot Project) was established in the Autumn of 1998 and since then
has been conducting experiments in the Kanto district. Additionally,
since 1999, joint research development facilities were established where
promotional experiments were conducted in Hokkaido (Sapporo), Tohoku
(Sendai), Shinetsu (Nagano), Hokuriku (Kanazawa), Tokai (Nagoya), Kinki
(Osaka), Chugoku (Hiroshima), Takamatsu/Okayama, Kyushu (Fukuoka), and
Okinawa.
The Tokyo Pilot performed phase one experiments mainly concerning digital
terrestrial transmission characteristics such as TV program and mobile
reception. These were followed by the fiscal 1999 phase two experiments
regarding transmission of video, audio, and data, which were application-oriented
tests similar to the actual services. An outline of the phase two experiments
from September, 1999 to March, is shown in Table 1.
Table 1: Tokyo Pilot phase 2 experiment
outline |
Video transmission |
Experiment name |
Outline |
Major participant companies, etc |
Transmission/
reception test |
Transmission parameters and reception
quality, CM transmission. |
NHK, 5 commercial broadcasters |
New video
services |
New video services experiments such
as for interactive programs which do not require return channels
and panoramic videos. |
TV Asahi, NHK Integrated Technology,
NTV |
CATV transmission |
OFDM reception over cable TV, Frequency
conversion, Passthrough. |
Maspro Denkoh, Yagi Antenna, Radiocommunication
Technology Association |
Satellite
distribution |
Transmission experiment of HDTV and
multiple SDTV hybrid programming via satellite. |
Space communication, Mitsubishi Electric |
Closed-captioning
broadcast |
Closed-Captioning transmission. |
NHK, 5 commercial broadcasters |
EPG/data transmission |
Experiment name |
Outline |
Major participant companies, etc |
EPG service |
EPG function development, Development of the EPG service. |
IBLabs., NHK, Nippon TV, Fuji TV |
Data transmission |
Verification of multimedia data contents transmission,various
presentation function experiment, and BML* data transmission. |
Fuji TV, NHK, Fujitsu |
Mobile
medium |
Interactive
program experiment using portable receiver
Various
antenna for mobile reception |
Denso, Maspro Denkoh, FM Tokyo, NHK, TBS, TV Asahi,
NTT DoCoMo |
Interactive
services |
Electronic
commerce
Interactive
contents, Application for CM |
ITF, Fuji TV, NTT. |
EPG terminal
operability |
Verification of interface operability for visually
impaired people. |
NEC, the MPT, Keio University. |
*XML-based multimedia coding sheme |
Extracted from the Tokyo Pilot (Digital
Terrestrial Broadcasting Tokyo Pilot Project) reference. |
Among these, in this article I will introduce two of the experiments:
data broadcasting and EPG service. Both experiments were conducted with
the Tokyo Tower being established as their program transmission facility.
This is also where the Tokyo Pilot experiment station (UHF Channel 15/Transmission
power 100W) is located.
1. Data broadcasting (TV program associated service)
During January 7 through January 21, 2000, performance verification
tests were conducted on the reception of XML-based multimedia coding
data which were to be broadcast with TV programs, data carousel transmission/reception
and TV program associated data service for the digital terrestrial television
broadcasting. The experimental program was received at Fuji TV (Odaiba),
and an open demonstration was presented to the members of the Tokyo
Pilot.
NHK, Fuji TV, and Fujitsu sent out their contents, confirmation of normal
reception and measuring of reception waiting time were carried out.
2. EPG service (Program indexing)
During February 21 through February 25, 2000, the Project conducted
experiments to confirm digital terrestrial television broadcasting's
application of program indexing systems, which transmit various attached
index signals as part of the TV program contents. For example, one of
the experiments was to transmit indexing of score data on a baseball
program to retrieve specific game scenes for viewing. The experimental
data was received at the Information Broadcasting Laboratories, Inc.
(IBLabs., Asakusa). Another open demonstration for the project members
was held on the last day of the experiment, February 25.
This series of experiments were carried out with the cooperation of
the IB Labs, NHK, Nippon TV, and Fuji TV.
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