Emergency alert signaling method, data structure for emergency alert message, and cable TV receiver

摘要

A cable broadcast signal includes an emergency alert message to be used by a cable TV system. The emergency alert message includes an alert priority and one or more alert region information sets which define one or more regions affected by the emergency alert message, respectively. Each region information includes a first country code identifying a country and a first local region code defining a local region within the identified country. The cable TV system processes the emergency alert message based upon comparing each alert region information with system region information preset to the cable TV system.