Emergency alert message data structure, emergency alert message signaling method, and cable broadcasting system
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United States of America Patent
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Feb 22, 2011
Grant Date -
Jan 26, 2006
app pub date -
Jul 22, 2005
filing date -
Jul 23, 2004
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An emergency alert message data structure, an emergency alert message signaling method, and a cable broadcasting system using the same are disclosed. The data structure includes a scroll rate field representing a scroll rate of an emergency alert text to be scrolled across a portion of a video screen. The emergency alert (EA) signaling method includes the steps of identifying an emergency alert message included in a cable broadcast signal, the emergency alert message including emergency alert text data representing an emergency alert text to be displayed, and a scroll rate field representing a scroll rate of the emergency alert text, and scrolling the emergency alert text across a first portion of a video screen according to the scroll rate indicated in the scroll rate field.
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