commercial source.
One of the problems revealed by the early Designs Department
experimental mixer was the difficulty of priming the schedule file or
"store" of the device in an efficient manner.
This task is further complicated by the necessity of having to generate
in advance, detailed executive information converning the nature of the
junctions between programmes. In an attempt to alleviate such problems,
the Section will be providing a mini computer interface to bridge the
gap between the ICL based TMIS system, currently used for programme
planning, and the schedule store of the commercial mixer. This will
enable Television Presentation to access pre-planned schedules from the
main computer files, edit them and add the necessary executive
information, using the arithmetic and text processing functions provided
by the mini-computer. Final transmission schedules will then be loaded
directly into the automatic mixer in their correct time slot.
In 1977 the production staff and design engineers involved have
concentrated their efforts on claryifying the relevant operational
requirements. Hardware should be available for development purposes in
February of 1978 and software preparation will then commence with a view
to introducing the system into service in the autumn of the same year.
Due to the novel aspects and developing nature of the entire project, it
is envisaged that requirements will change as the staff concerned become
more familiar with the problems involved. Hence software amendment is
likely to continue well into the field trial period.
Matrix Remote Control System
This year has seen the development of a remote switching system for
Television Outside Broadcasts. The design arose out of a need to
simplify operational situations that called for central source selection
equipment to be controlled by an individual at a remote point. A
typical example would be picture
monitor
feed
for
a
commentator
and/or lighting engineer situated
some distance from a Colour Mobile
Control
Room.
Discussion
of
the
system specification for this design
started late last year and detailed
work
on
its
development
has
continued throughout 1977. The
equipment
generates
a
digital
control signal which can be
transmitted
back
to
the
CMCR's
v~sion switching matrix via either a
sound line, RF link or video coaxial
cable.
In the
latter case the same
cable can be used for the
contributing video and return data feed, hence eliminating the need for
an additional link. The design will be completed in the spring of 1978
and Designs Department and Equipment Department will be co-operating on
the early manufacture of some 25 systems to meet the urgent needs of
Type 5 Colour Mobile Control Rooms.
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