Method of transmitting broadcast signal, method of processing broadcast signal and apparatus for the same
A method of processing a broadcast signal relevant to an emergency alert and a broadcast receiver for the same are disclosed, by which information on a channel for carrying an emergency alert broadcast can be prevented from being overlapped with information on other general channels. The present disclosure generating an emergency alert table including frequency information of an emergency alert channel, and transmitting a digital broadcasting signal including the emergency alert table, wherein the frequency information of the emergency alert channel is inserted in a descriptor that provides an additional pointer to the emergency alert channel, wherein the descriptor references the emergency alert channel by means of the frequency information.
1. A method of transmitting a digital broadcasting signal, comprising:
generating an emergency alert table including a plurality of data fields, wherein one of the data fields includes information that includes an emergency alert table descriptor, wherein the emergency alert table descriptor contains additional data fields, wherein the additional data fields indicate frequency information, program number information of an emergency alert channel and identification information of a service provider managing at least one area; and
transmitting, at a digital television broadcast transmitter, a digital broadcasting signal including the emergency alert table;
wherein the frequency information and the program number information of the emergency alert channel are inserted in the additional data fields that provide additional pointers to the emergency alert channel,
wherein the emergency alert table descriptor references the emergency alert channel by means of the frequency information, the program number information, and the identification information of the service provider managing at least one area.
2. The method of claim 1 , wherein the channel number information includes an in-band major channel number and an in-band minor channel number of the emergency alert channel.
3. The method of claim 1 , wherein the emergency alert table further includes alert priority information indicating a priority of alert.
4. The method of claim 1 , wherein the service provider is a cable broadcast station.
5. A method of processing emergency alert information in a receiver, comprising:
receiving, at a digital broadcast receiver, a digital broadcasting signal including an emergency alert table containing a plurality of data fields, wherein one of the data fields includes information that includes an emergency alert table descriptor, wherein the emergency alert table descriptor contains additional data fields, wherein the additional data fields indicate frequency information, program number information of an emergency alert channel and identification information of a service provider managing at least one area;
parsing the emergency alert table and extracting the frequency information, the program number information and the identification information of the service provider managing at least one area from the emergency alert table descriptor included in the emergency alert table and extracting channel number information of the emergency alert channel from the emergency alert table; and
tuning to the emergency alert channel when a state of emergency channel tuning to the emergency alert channel occurs;
wherein the emergency alert channel is acquired from the channel number information.
6. The method of claim 5 , wherein the channel number information includes an in-band major channel number and an in-band minor channel number of the emergency alert channel.
7. The method of claim 5 , wherein the emergency alert table further includes alert priority information indicating a priority of alert.
8. The method of claim 5 , wherein the service provider is a cable broadcast station.
9. A digital television receiver, comprising:
a tuner for receiving a digital broadcasting signal including an emergency alert table containing a plurality of data fields, wherein one of the data fields includes information that includes an emergency alert table descriptor, wherein the emergency alert table descriptor contains additional data fields, wherein the additional data fields indicate frequency information, program number information of an emergency alert channel, and identification information of a service provider managing at least one area;
a parser for parsing the emergency alert table and extracting the frequency information, the program number information and the identification information of the service provider managing at least one area from the emergency alert table descriptor included in the emergency alert table and channel number information of the emergency alert channel from the emergency alert table; and
a controller for controlling the tuner to tune to the emergency alert channel when a state of emergency channel tuning to the emergency alert channel occurs, wherein the emergency alert channel is acquired from the channel number information.
10. The digital television receiver of claim 9 , wherein the channel number information includes an in-band major channel number and an in-band minor channel number of the emergency alert channel.
11. The digital television receiver of claim 9 , wherein the emergency alert table further includes alert priority information indicating a priority of alert.
12. The method of claim 9 , wherein the service provider is a cable broadcast station.