Transmitting/receiving system and method for processing a broadcast signal

A broadcast transmitter for transmitting an emergency alert message, the broadcast transmitter comprising:

• a first encoder circuit configured to first encode service data and signaling data for a service;
• a second encoder circuit configured to second encode the first encoded service data and the first encoded signaling data;
• a signaling encoder configured to FEC encode transmission parameter data, wherein the transmission parameter data includes encoding information of the service data;
• a modulator configured to modulate the second encoded service data, the second encoded signaling data, and the FEC encoded transmission parameter data;
• and
• a transmitting unit to configured to transmit a broadcast signal including the modulated service data, the modulated signaling data, and the modulated transmission parameter data,
• wherein the signaling data includes a first signaling table and a second signaling table,
• wherein the first signaling table includes first service identification information to identify the service, type information to indicate whether a type of the service is an emergency alert service, indication information to indicate whether the service is hidden or not, and protection indication information to indicate whether one or more components needed for presentation of the service are protected,
• wherein the second signaling table includes the emergency alert message,
• wherein the emergency alert message includes text data for an emergency notification and priority information to specify a priority of the emergency alert message,
• wherein the first signaling table and the second signaling table are delivered in Internet Protocol (IP) packets,
• wherein IP access information for accessing the first signaling table is identical to IP access information for accessing the second signaling table, and
• wherein the first signaling table and the second signaling table are identified by a value of a table identifier, respectively.

A method of receiving an emergency alert message by a broadcast terminal, the method comprising:

• receiving a broadcast signal including service data, signaling data for a service, and transmission parameter data;
• demodulating the received broadcast signal;
• Forward Error Correction (FEC) decoding the transmission parameter data in the demodulated broadcast signal;
• first decoding the service data and the signaling data in the demodulated broadcast signal;
• and
• second decoding the first-decoded service data and the first-decoded signaling data,
• wherein the transmission parameter data includes encoding information of the service data,
• wherein the signaling data includes a first signaling table and a second signaling table,
• wherein the first signaling table includes first service identification information to identify the service, type information to indicate whether a type of the service is an emergency alert service, indication information to indicate whether the service is hidden or not, and protection indication information to indicate whether one or more components needed for presentation of the service are protected,
• wherein the second signaling table includes the emergency alert message,
• wherein the emergency alert message includes text data for an emergency notification and priority information to specify a priority of the emergency alert message,
• wherein the first signaling table and the second signaling table are received in Internet Protocol (IP) packets,
• wherein IP access information for accessing the first signaling table is identical to IP access information for accessing the second signaling table, and
• wherein the first signaling table and the second signaling table are identified by a value of a table identifier, respectively.

A broadcast terminal for receiving an emergency alert message in a sleep mode, the broadcast terminal comprising:

• a tuner configured to receive a broadcast signal including service data, signaling data for a service and transmission parameter data;
• a demodulator configured to demodulate the received broadcast signal;
• a signaling decoder circuit configured to Forward Error Correction (FEC) decode the transmission parameter data in the demodulated broadcast signal;
• a first decoder circuit configured to first decode the service data and the signaling data in the demodulated broadcast signal;
• and
• a second decoder circuit configured to second decode the first-decoded service data and the first-decoded signaling data,
• wherein the transmission parameter data includes encoding information of the service data,
• wherein the signaling data includes a first signaling table and a second signaling table,
• wherein the first signaling table includes first service identification information to identify the service, type information to indicate whether a type of the service is an emergency alert service, indication information to indicate whether the service is hidden or not, and protection indication information to indicate whether one or more components needed for presentation of the service are protected,
• wherein the second signaling table includes the emergency alert message,
• wherein the emergency alert message includes text data for an emergency notification and priority information to specify a priority of the emergency alert message,
• wherein the first signaling table and the second signaling table are received in Internet Protocol (IP) packets,
• wherein IP access information for accessing the first signaling table is identical to IP access information for accessing the second signaling table, and
• wherein the first signaling table and the second signaling table are identified by a value of a table identifier, respectively.