Broadcast signal transmission/reception device and method

A broadcast signal transmitter comprising:

• a communication unit configured to transmit a broadcast signal;
• a memory configured to store data;
• and
• a processor configured to control the communication unit and the memory,
• wherein the broadcast signal transmitter is configured to
• generate low level signaling (LLS) information, wherein the LLS information includes table ID information for identifying a type of the LLS information,
• process the LLS information into IP packets,
• generate link layer packets by link layer processing the IP packets, and
• generate the broadcast signal by physical layer processing the link layer packets, and
• wherein the LLS information includes emergency alert (EA) information according to the table ID information, the emergency alert information includes at least one alert message, and the alert message includes priority information indicating a priority of an alert.

A broadcast signal receiver comprising:

• a tuner configured to tune a broadcast signal;
• and
• a signaling parser configured to parse signaling information comprising low level signaling (LLS) information, wherein the LLS information includes table ID information for identifying a type of the LLS information,
• wherein the LLS information includes emergency alert (EA) information according to the table ID information, the emergency alert information includes at least one alert message, and the alert message includes priority information indicating a priority of an alert.