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The 2nd generation of Digital Video Broadcasting for Satellite (DVB-S2) standards allows the direct transmission of IP content using the Generic Stream Encapsulation (GSE) protocol, replacing the existing Transport Stream (MPEG-2 TS). This represents an evolution from the two current encapsulation methods: the native use of the Packetized Elementary Stream (PES) over TS for MPEG-2 encoded applications and, the use of adaptation protocols such as the Multi-Protocol Encapsulation (MPE) and the Unidirectional Lightweight Encapsulation (ULE) over TS for IP-based MPEG-4 encoded content. This paper reviews this evolution and analyses the overhead improvement resulting from this IP-only architecture. This evaluation considers the impact of using RObust Header Compression (ROHC) on the efficiency for DVB-S2 IP/GSE-only transmission.