This Technical Specification establishes the method of location referencing used by TPEG applications such
as TPEG-RTM or TPEG-PTI.
TPEG applications are specified to contain all the information required by a client TPEG decoder (i.e. both
location referencing and event information), to present all the information intended for the end-user when it
was originated by the service provider.
The term ¿application¿ is used in TPEG specifications to describe specific applications, which are at the
highest layer of the ISO/OSI protocol stack (ISO/IEC 7498-1). Each TPEG application (e.g. TPEG-RTM) is
assigned a unique number that is called the Application IDentification (AID). In this respect TPEG-Loc is not
an application, but it is an essential constituent part of an application.
Location referencing requires a service provider to give an impression or image to the human end-user of
where an event has taken place. This cannot be done easily because the human end-user may or may not be
familiar with the location. TPEG-Loc has the added challenge of attempting to be as language independent as
possible. This is achieved by the use of TPEG-Loc tables (essentially word oriented data object dictionaries).
TPEG-Loc also provides location data in a machine-readable form that allows a ¿thick¿ client such as a
navigation system to map-match, on-the-fly, to locate the event being described onto a digital map display.