IP-, : .
. DVB 50(DVB-C (VHF/UHF) QAM: 16-QAM, 32-QAM, 64-QAM, 128-QAM 256-QAM), 100 . , DVB .
, . FEC ( ).
: , . RTP-, .
IPTV , unicast, multicast broadcast. Unicast ( ) . , , . . . 5.1. .
5.1 unicast
Broadcast () , IPTV- . . , .
Multicast ( ) IPTV-. -, , . multicast , , - . IGMP.
5.2 multicast
multicast STB. UDP. multicast .
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. , , .
:
1 , , .
2 , , .
3 . , .
4 . , .
5 , , , . , , IP .
IGMP
IGMP (Internet Group Management Protool) . . , , IGMP- (membership report), , - . , - , , .
. IGMP v.1 . , , (membership query) . . , . . , , . IGMP IGMP Snooping.
IGMP v.2 (leave group). , , ; , . , , . , , IP-, -, - , , , . . , . IGMP Snooping. IGMP- . , , . , . . IGMP Snooping IGMP v.2 . , , , , . , c IPTV .
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IGMP , , , , . - IGMP SAP (Service Announcement Protocol) , .