Ericsson 1553-FGC 101 1010 Uen A Guía de usuario descargar pdf (Pagina 15)

Introduction to the EQ8096

• The RF channel that each TS is multiplexed to is defined in Table 1.3.

• The EQ8096 can optionally be controlled via an ERM/SDV server using RPC

control protocol.

1.2.3 Transport Stream Processing

The EQ8096 is designed to automatically detect incoming Transport Streams and

remultiplex them into new multi-program Transport Streams.

• Each service has its PCR recovered and re-stamped after Multiplexing into the

output MPTS (QAM). The subsequent absolute bit rate of the output stream will

be within +/- 30 ppm of the originating stream. The rate of change of bit rate of

each multiplexed service is within the MPEG-2 system specification.

1.2.4 PSI Extraction and Insertion

The unit carries out automatic PSI extraction (PAT and PMTs referenced in the

PAT) from each of the incoming TS flows. While the unit remains locked to the

incoming flow it periodically monitors the incoming transport stream for changes in

the PAT or PMT.

The PIDs extracted from these tables are used to configure the PID filters for each

of the flows. Each PID filter supports the filtering and remapping of up to 16

elementary streams. These are extracted sequentially from the PMT. A single SPTS

will occupy 1 PID filter. For MPTS, single services within occupy 1 PID filter, thus

allowing any MPEG service to convey up to 16 elementary streams. The EQ8096

does not support extraction of tables other than the PAT and PMT.

For each generated multiplexed transport stream, the EQ8096 generates a PAT and

series of PMTs that reflect the make up of the transport stream. Any descriptors

extracted from the incoming flow are transferred to the appropriate PMT.

The user can define the PID ranges to be used for the PMTs, elementary streams

and ECMs.

1.2.5 DOCSIS 3.0 DTI Timestamping

When a channel is being operated as a DEPI data device, the unit will automatically

adjust or insert time stamps based on the current unit running Time stamp. The

optional DTI client card translates DTI time stamps from the DTI server and provides

DTI lock to the EQ8096 unit. This frequency lock is used to stamp or insert

(depending on DEPI PSP or MPT mode) DEPI SYNC packets as they transit

through the box.

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Ericsson 1553-FGC 101 1010 Uen A Guía de usuario Pagina 15