Silicon Labs Si2183 (current brand is Skyworks).
It was already answered by crazycat, who is the most knowledged user around here:
viewtopic.php?f=203&t=25658&p=56571#p56571It is a multistandard chip, which might be switched programatically between: DVB-S/S2/S2X, DVB-T/T2, DVB-C, DVB-C2 and ISDB-T.