Patent ID: 8893205

Claim:
A method of providing a virtual channel map in an Internet protocol TV (IPTV) transmitter, the method comprising: transmitting a provision information including location information of a master system information (SI) table through a network; and transmitting a master SI table pointed by the location information of the master SI table, wherein the master SI table includes location information of a virtual channel map information; and transmitting the virtual channel map pointed by the location information of the virtual channel map, wherein the virtual channel map includes a default location of details information of virtual channels in the virtual channel map, a first service identifier for identifying a virtual channel and an override location of details information of a virtual channel in the virtual channel map, wherein the override location overrides the default location, wherein the details information include a second service identifier, and wherein details information of the virtual channel identified by the first service identifier corresponds to details information whose second service identifier is equal to the first service identifier.