Authorization of Digital Satellite Broadcasting
The Ministry of Posts and Telecommunications authorized data broadcasting
providers on December 17, 1999. By this authorization, all the participants
in digital television, sound, and data broadcasting have been decided.
Data broadcasting provider selection
Twelve transmission slots (1 slot=1.08Mbps of transmission capacity)
were allocated for providers specializing in data services, and eight
companies were authorized to use these transmission capacities. One
of the MPT's selection guidelines gave priority to new providers rather
than existing broadcasters. The newly authorized data broadcasting providers
consist of companies from various industries. Included are communications
services, newspapers, publishing firms, manufacturers, a retail store,
and software producers.
Securing engineering broadcasting
As a special form of data broadcasting, engineering broadcasting was
also approved. By means of engineering broadcasting, newly updated receiver
software can be transmitted to upgrade functions on a previously purchased
Frequency allocation for digital satellite broadcasting
Utilizing digital satellite broadcasting, new types of services are
going to be promoted by the 20 companies. Broadcasters assigned to four
transponders are shown in Figure 1. Data broadcasting services will
not be offered exclusively by the eight companies that provide data
broadcasting services. Eight authorized digital TV broadcasters and
four digital sound broadcasters are also permitted to carry out data
broadcasting using previously allotted transmission slots.
Each broadcasting provider is now implementing full-scale examination
of attractive service contents. New service-contents greatly exceeding
the framework of conventional broadcasting may be created. It can be
said that the dream of ISDB, geared towards more colorful services,
is about to be realized in the 21st century.
|Figure 1: The Second Launched BS-4 Satellite