A method includes compressing headers of Internet Protocol (IP) packets in an IP packet stream to output a compressed IP packet stream, wherein the compressed IP packet stream includes Initialization Refresh (IR) packets, a first group of IR-dynamic packets, and compressed IP packets, extracting context information from the compressed IP packet stream, building signaling information including the context information, encapsulating the signaling information into one or more link layer packets of a first group and the compressed IP packet stream into link layer packets of a second group that are distinct from the one or more link layer packets of the first group, and transmitting broadcast signals including the one or more link layer packets of the first group and the link layer packets of the second group that correspond to a plurality of data pipes.