Ericsson SPR1100, Handbook, Page: 97 / 256

Home > SPR1100 Handbook > Transport Stream Output > Transport Stream > Services
Services
Overview
The system is capable of forming up to 72 services divided between the output transport
streams.
Each service can contain a maximum of 18 elementary streams, consisting of a maximum of
8 data components, 8 audio components, one main video and one PIP video component.
An elementary stream can be included in up to four services. Only one main video
elementary stream can be assigned to a service, and the audio delay will be matched to the
video. A PIP Video stream may also be added. Only one
PCR can be associated with a
service.
Service Information Tables
The SI tables that the system generates for each individual output transport stream can be
selected. The following table shows the available levels.
SI Level Description
Off Elementary streams only
On (PAT/PMT Only) PAT/PMT are generated
On (PAT/PMT/SDT/CAT) The listed tables are generated. The CAT will
be empty as Conditional Access is not
supported in this release.
Some users may not require ETR 290 compliance, so it is possible to set the PMT repetition
rate to either 100 ms (default) or 500 ms.
Formation of SI
SI packet formation and play out is the responsibility of the host card. However it is the
Media Processing Module's responsibility to provide SI data fields related to the stream that
it is generating.
Repetition Rate
The repetition rate of SI packets must take into account the output transport stream rate,
otherwise the jitter introduced by the multiplexing of packets to form the transport stream
can lead to the SI repetition rate being too long.