A broadcast signal transmission processing apparatus, includes a header compression processor that generates a first packet including first header information in a uncompressed form and second packets including second header information in a compressed form by performing header compression on Internet protocol (IP) packets containing broadcast data, a header information extracting processor that extracts the first header information from the first packet and converts the first packet from which the first header information is extracted to a third packet including third header information in a compressed form, a signaling data generating processor that generates signaling packets containing information related to the header compression and mapping information between the IP packets and at least one data pipe for the IP packets, and a broadcast signal transmitting processor that transmits a broadcast signal including multiple data pipes that include at least one data pipe.