Emergency alert signaling method and digital cable broadcast...

Details Emergency alert signaling method and digital cable broadcast... Emergency alert signaling method and digital cable broadcast...

G - Physics

08

B

G08B 27/00 (2006.01) G08B 29/00 (2006.01) H04N 7/025 (2006.01) H04N 5/445 (2006.01) H04N 7/24 (2006.01)

Patent

CA 2568268

A digital cable broadcast system includes a broadcast receiver, a broadcast transmitter, and an alternative data receiver. The broadcast transmitter transmits a new emergency alert message associated with an emergency alert event if the broadcast receiver is not plugged into a power supply. More particularly, the transmitter transmits a status request to a cable mode or an out of band (OOB) included in the broadcast receiver, and it determines that the receiver is not plugged into the power supply if no response is received from the receiver. The alternative data receiver receives the new emergency alert message from the transmitter and displays the new emergency alert message in order to inform users.

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