Patent ID: 8874683

Claim:
A method of transmitting a broadcast signal for a Non-Real Time (NRT) service, the method comprising: generating the broadcast signal including the NRT service that is delivered in advance of its use and stored in a receiving device, and signaling data including an NRT Information Table (NRT-IT) describing one or more content items in the NRT service available for download to storage in the receiving device and a Service Map Table (SMT) containing information used as a linkage between the SMT and the NRT-IT; and transmitting the NRT service in advance of its use via a broadcast channel and the signaling data via a Service Signaling Channel (SSC) with a specific IP address and UDP port number, wherein the NRT service is delivered within IP packets, wherein the IP packets associated with a virtual channel are identified by references in a Virtual Channel Table (VCT) and an associated Program Map Table (PMT), wherein the IP packets are carried in MPEG-2 Transport Stream using Digital Storage Media Command and Control (DSM-CC) Addressable Section format, and wherein the NRT-IT is composed of at least one NRT-IT instance, wherein the NRT-IT instance includes data corresponding to an arbitrarily defined time period, wherein the NRT-IT instance includes information indicating a start time of a period covered by the NRT-IT instance and information indicating a length of the period covered by the NRT-IT instance.