Emergency alert signaling method and digital television receiver
First Claim
1. An emergency alert signaling method for use by a terrestrial digital television receiver, the method comprising:
- receiving a terrestrial television signal having an emergency alert table, the emergency alert table comprising text data representing an emergency alert message;
demodulating the terrestrial television signal;
demultiplexing the emergency alert table from the demodulated digital television signal;
parsing the text data from the demultiplexed emergency alert table; and
scrolling the emergency alert message across a portion of a video screen.
1 Assignment
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Accused Products
Abstract
A terrestrial digital television receiver includes a tuner, a demodulator, a demultiplexer, a decoder, and a controller. The tuner receives a terrestrial television signal having an emergency alert table which contains text representing an emergency alert message. The demodulator demodulates the television signal and the demultiplexer demultiplexes the emergency alert table from the demodulated signal. The decoder parses the text data representing the emergency alert message, and the controller control operation of a display device such that the emergency alert message is scrolled across a predetermined portion of a video screen.
21 Citations
20 Claims
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1. An emergency alert signaling method for use by a terrestrial digital television receiver, the method comprising:
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receiving a terrestrial television signal having an emergency alert table, the emergency alert table comprising text data representing an emergency alert message;
demodulating the terrestrial television signal;
demultiplexing the emergency alert table from the demodulated digital television signal;
parsing the text data from the demultiplexed emergency alert table; and
scrolling the emergency alert message across a portion of a video screen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A terrestrial digital television receiver comprising:
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a tuner arranged to receive a terrestrial television signal having an emergency alert table, the emergency table comprising text data representing an emergency alert message;
a demodulator arranged to demodulate the terrestrial television signal;
a demultiplexer arranged to demultiplex the emergency alert table from the demodulated television signal;
a decoder arranged to parse the text data from the demultiplexed emergency alert table; and
a controller arranged to control operation of a display device in order to scroll the emergency alert message across a portion of a video screen. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification