Emergency alert signaling method and DTV receiver
First Claim
1. An emergency alert signaling method for use by a digital television (DTV) receiver, the method comprising:
- determining whether the DTV receiver is on a power-on mode or a power-off mode;
periodically tuning to a first emergency alert channel to receive a first master guide table when the DTV receiver is on the power-off mode;
parsing the first master guide table without setting the DTV receiver on the power-on mode to determine whether a new emergency alert message is being received; and
automatically setting the DTV receiver on the power-on mode and tuning to a second emergency alert channel when the parsed first master guide table indicates that the new emergency alert message is being received.
1 Assignment
0 Petitions
Accused Products
Abstract
A terrestrial digital television receiver includes a tuner, a microcomputer, and a demodulator. The microcomputer initially determines whether the DTV receiver is on, a power-on or power-off mode. If the DTV receiver is on the power-off mode, the microcomputer, control operation of the tuner to tune to a predefined emergency alert channel to receive a master guide table. The demodulator parses the master guide table. If the parsed master guide table indicates that a new emergency alert message is being received, the microcomputer automatically sets the DTV receiver on the power-on mode and controls operation of the tuner to tune to the emergency alert channel.
8 Citations
40 Claims
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1. An emergency alert signaling method for use by a digital television (DTV) receiver, the method comprising:
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determining whether the DTV receiver is on a power-on mode or a power-off mode; periodically tuning to a first emergency alert channel to receive a first master guide table when the DTV receiver is on the power-off mode; parsing the first master guide table without setting the DTV receiver on the power-on mode to determine whether a new emergency alert message is being received; and automatically setting the DTV receiver on the power-on mode and tuning to a second emergency alert channel when the parsed first master guide table indicates that the new emergency alert message is being received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 33, 37)
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11. An emergency alert signaling method for use by a digital television (DTV) receiver, the method comprising:
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determining whether the DTV receiver is on a power-on mode or a power-off mode; periodically tuning to a first emergency alert channel to receive a first emergency alert table when the DTV receiver is on the power-off mode; parsing the first emergency alert table without setting the DTV receiver on the power-on mode to determine whether the first emergency alert table includes a new emergency alert message; and automatically setting the DTV receiver on the power-on mode and tuning to a second the emergency alert channel when the parsed first emergency alert table includes the new emergency message. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 34, 38)
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20. A digital television (DTV) receiver, comprising:
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a tuner; a microcomputer determining whether the DTV receiver is on a power-on mode or power-off mode and controlling operation of the tuner to periodically tune to a first emergency alert channel to receive a first master guide table when the DTV receiver is on the power-off mode; and a demodulator parsing the first master guide table without setting the DTV receiver on the power-on mode to determine whether a new emergency alert message is being received, wherein the microcomputer automatically sets the DTV receiver on the power-on mode and controls operation of the tuner to tune to a second the emergency alert channel when the parsed first master guide table indicates that the new emergency alert message is being received. - View Dependent Claims (21, 22, 23, 24, 25, 26, 35, 39)
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27. A digital television (DTV) receiver, comprising:
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a tuner; a microcomputer determining whether the DTV receiver is on a power-on mode or a power-off mode and controlling operation of the tuner to periodically tune to a first predefined emergency alert channel to receive a first emergency alert table when the DTV receiver is on the power-off mode; and a demodulator parsing the first emergency alert table without setting the DTV receiver on the power-on mode to determine whether the first emergency alert table includes a new emergency alert message, wherein the microcomputer automatically sets the DTV receiver on the power-on mode and controls operation of the tuner to tune to a second emergency alert channel when the parsed first emergency alert table includes the new emergency message. - View Dependent Claims (28, 29, 30, 31, 32, 36, 40)
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Specification