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Digicast Media Router S2 Receiver CMR-5995 (MR-S2-ASI)
IP Routing Support
B.3
Section Packing
Section packing (Figure B-2) is a technique that provides more optimal utilization of the MPEG-2
transport stream (TS) packet structure. When section packing is not used, each TS packet
(containing the MPE section) can carry no more than a single section. This often results in wasted
payload capacity when the sections are less than 184 bytes.
The section packing feature allows more than a single MPE section to be carried by an MPEG-2
TS packet, thereby minimizing wasted payload capacity.
In the case of a large MPE section that spans multiple MPEG-2 packets, the ending of an MPE
section may occur in the middle of an MPEG-2 packet. In this instance, with section packing, a
new MPE section begins immediately after the first MPE section has finished without any 'fill'
(wasted) bytes having to be inserted before the start of the next MPEG-2 packet.
Figure B-2. Section Packing
B–4
Revision 1
MN-CMR5995-IOM
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