Location-aware emergency broadcast receiver

摘要

Disclosed is an emergency broadcast receiver. The receiver comprises an alert device, a tuner adapted to demodulate a baseband signal from a radio frequency signal, a signal decoder adapted to extract digital data from the demodulated baseband signal, a location device adapted to provide location data representing a location of the emergency broadcast receiver; and an embedded controller. The embedded controller is adapted to detect a trigger signal in the extracted digital data, determine whether location information encoded in the detected trigger signal corresponds with the location data; and activate, based on the determination, the alert device.

主权项

1. An emergency broadcast receiver comprising:
an alert device; a tuner adapted to demodulate a baseband signal from a radio frequency signal; a signal decoder adapted to extract digital data from the demodulated baseband signal; a location device adapted to provide location data representing a location of the emergency broadcast receiver; and an embedded controller adapted to:
determine periodically whether the extracted digital data represents a data stream validly encoded according to a trigger modality of the emergency broadcast receiver, and where the data stream is determined to be validly encoded according to the trigger modality of the emergency broadcast receiver;detect a trigger signal in the data stream;determine whether location information encoded in the detected trigger signal corresponds with the location data; andactivate, based on a determination that the information encoded in the detected trigger signal corresponds with the location data, the alert device.