User guide

Introduction
1.3 Summary of Features
1.3.1 Overview
The MX8400 MPEG Video/Audio/Data Multiplexer is housed in a 2RU, 19-inch rack
mounted unit. It is designed to meet the needs of IP distribution infrastructures. It is
ideally suited to a wide range of multiplexing and re-multiplexing applications. These
include primary multiplexing in headends for Direct-to-Home (DTH) satellite
contribution and distribution systems. It can also provide the hub for applications in
cable and terrestrial television central headends.
1.3.2 Main Features
• Up to eight independent output transport streams, each capable of creating a
multi-program stream conforming to the MPEG-2 transport layer specification
(ISO/IEC 13818-1 MPEG-2 Systems). Each multiplexer can be configured
independently e.g. output data rates, PCR mode of operation.
Note: The MX8400/BAS provides a single multiplexer engine which produces a
single output transport stream, additional multiplexers are a licensable
feature (MX8400/SWO/MUX).
• The maximum output bit rate for a single multiplexer is 250 Mbps. The
resolution, to which the output rate of a transport stream can be set, by entering
a bit rate, is 1 bps.
• The output bit rate can be set exactly to any of the DVB-T modes.
• SFN adapter functionality is included to produce an output transport stream in
accordance to TS 101 191 V1.4.1.
Note: When operating in SFN mode, the output bit rate is calculated as described
in Annex H.
• The maximum aggregated output bit rate is 1 Gbps, shared across the transport
streams created.
• Each multiplexer supports Ericsson Reflex Statistical Multiplexing (see also
Section 1.3.3 for Remote Reflex). This enables connected Encoders to be
grouped together to share an overall group bit rate, allocating a percentage of
the total bit rate to each Encoder depending on the complexity of the encoded
content.
• Ericsson Reflex Statistical Multiplexing allows bandwidth harvesting to help
maintain quality targets. Any bit rates not being used by multiplexed components
are distributed across all component video services. Data rate sharing between
components allows a user-defined higher quality-target component to take
bandwidth from user-defined lower quality-target components.
• Internal time references are used to ensure the multiplexing process does not
affect time critical data.
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