Systems and methods for emergency vehicle proximity warnings using digital radio broadcast
First Claim
1. A method for receiving an emergency alert message at a digital radio broadcast receiver system from a digital radio broadcast transmission system of a mobile vehicle;
- the method comprising;
controlling the digital radio broadcast receiver system to automatically tune to an emergency notification frequency within an FM commercial broadcast band or an AM commercial broadcast band while the digital radio broadcast receiver system is also tuned to a radio broadcast of a second frequency different from the emergency notification frequency, the emergency notification frequency being a frequency at which a digital radio broadcast transmission system of a mobile vehicle broadcasts emergency alert messages;
receiving, at the digital radio broadcast receiver system, a digital radio broadcast signal broadcasted at the emergency notification frequency by the digital radio broadcast transmission system, the digital radio broadcast signal including the emergency notification frequency and multiple data channels mapped to subcarriers of the emergency notification frequency, and the digital radio broadcast signal having characteristics that enable the digital radio broadcast signal to be decoded only by digital radio broadcast receivers located within a localized area in a proximity of the transmission system;
determining whether a source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system;
detecting first data comprising an emergency alert notification code within one data channel of the multiple data channels of the digital radio broadcast signal; and
based on the detection of the first data and the determination that the source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system, rendering second data included within an additional data channel of the multiple data channels of the digital radio broadcast signal at the digital radio broad cast receiver system, the second data comprising an emergency alert message.
5 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods are disclosed for communicating an emergency alert message from a digital radio broadcast transmission system of a mobile vehicle to a digital radio broadcast receiver system. A digital radio broadcast signal including first and second data is broadcasted using the digital radio broadcast transmission system to end-user digital radio broadcast receivers. The first data includes an emergency code, and the second data includes an emergency alert message. The digital radio broadcast signal is transmitted at a predetermined frequency that is recognized by the receivers as an emergency notification frequency. The digital radio broadcast signal can be decoded only by receivers located within a localized area in a proximity of the transmission system. The receivers are configured to automatically tune to the emergency notification frequency to receive the digital radio broadcast signal and render the second data based on a detection of the emergency code within the signal.
46 Citations
18 Claims
-
1. A method for receiving an emergency alert message at a digital radio broadcast receiver system from a digital radio broadcast transmission system of a mobile vehicle;
- the method comprising;
controlling the digital radio broadcast receiver system to automatically tune to an emergency notification frequency within an FM commercial broadcast band or an AM commercial broadcast band while the digital radio broadcast receiver system is also tuned to a radio broadcast of a second frequency different from the emergency notification frequency, the emergency notification frequency being a frequency at which a digital radio broadcast transmission system of a mobile vehicle broadcasts emergency alert messages; receiving, at the digital radio broadcast receiver system, a digital radio broadcast signal broadcasted at the emergency notification frequency by the digital radio broadcast transmission system, the digital radio broadcast signal including the emergency notification frequency and multiple data channels mapped to subcarriers of the emergency notification frequency, and the digital radio broadcast signal having characteristics that enable the digital radio broadcast signal to be decoded only by digital radio broadcast receivers located within a localized area in a proximity of the transmission system; determining whether a source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system; detecting first data comprising an emergency alert notification code within one data channel of the multiple data channels of the digital radio broadcast signal; and based on the detection of the first data and the determination that the source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system, rendering second data included within an additional data channel of the multiple data channels of the digital radio broadcast signal at the digital radio broad cast receiver system, the second data comprising an emergency alert message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
- the method comprising;
-
17. A digital broadcast receiver system configured to receive an emergency alert message from a digital radio broadcast transmission system, the digital radio broadcast receiver system comprising:
-
a processing system; and a memory coupled to the processing system wherein the processing system is configured to; control the digital radio broadcast receiver system to automatically tune to an emergency notification frequency within an FM commercial broadcast band or an AM commercial broadcast band while the digital radio broadcast receiver system is also tuned to a radio broadcast of a second frequency different from the emergency notification frequency, the emergency notification frequency being a frequency at which a digital radio broadcast transmission system of a mobile vehicle broadcasts emergency alert messages; receive a digital radio broadcast signal broadcasted at the emergency notification frequency by the digital radio broadcast transmission system, the digital radio broadcast signal including the emergency notification frequency and multiple data channels mapped to subcarriers of the emergency notification frequency, and the digital radio broadcast signal having characteristics that enable the digital radio broadcast signal to be decoded only by end-user digital radio broadcast receivers located within a localized area in a proximity of the transmission system; determine whether a source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system; detect first data comprising an emergency alert notification code within one data channel of the multiple data channels of the digital radio broadcast signal; and based on the detection of the first data and the determination that the source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system, render second data included within an additional data channel of the multiple data channels of the digital radio broadcast signal at the digital radio broadcast receiver system, the second data comprising an emergency alert message.
-
-
18. An article of manufacture comprising a non-transitory computer readable storage medium having computer program instructions for receiving an emergency alert message at a digital radio broadcast receiver system from a digital radio broadcast transmission system of a mobile vehicle, said instructions when executed adapted to cause a processing system to:
-
control the digital radio broadcast receiver system to automatically tune to an emergency notification frequency within an FM commercial broadcast band or an AM commercial broadcast band while the digital radio broadcast receiver system is also tuned to a radio broadcast of a second frequency different from the emergency notification frequency, the emergency notification frequency being a frequency at which a digital radio broadcast transmission system of a mobile vehicle broadcasts emergency alert messages; receive a digital radio broadcast signal broadcasted at the emergency notification frequency by the digital radio broadcast transmission system, the digital radio broadcast signal including the emergency notification frequency and multiple data channels mapped to subcarriers of the emergency notification frequency, and the digital radio broadcast signal having characteristics that enable the digital radio broadcast signal to be decoded only by end-user digital radio broadcast receivers located within a localized area in a proximity of the transmission system; determining whether a source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system; detect first data comprising an emergency alert notification code within one data channel of the multiple data channels of the digital radio broadcast signal; and based on the detection of the first data and the determination that the source of the digital radio broadcast signal broadcasted at the emergency notification frequency is approaching the digital radio broadcast receiver system, render second data included within an additional data channel of the multiple data channels of the digital radio broadcast signal at the digital radio broad cast receiver system, the second data comprising an emergency alert message.
-
Specification