Data structure and signaling method for emergency alert...

Details Data structure and signaling method for emergency alert... Data structure and signaling method for emergency alert...

2005-07-11

2009-08-18

Pendleton, Brian T (Department: 2425)

Interactive video distribution systems

Program, message, or commercial insertion or substitution

Emergency warning

C725S032000

Reexamination Certificate

active

07577971

ABSTRACT:
An emergency alert message is included in a cable broadcast signal. The emergency alert message includes major and minor details channel numbers associated with a details channel. A details channel number is configured based on the major details channel number when the minor details channel number is set to a null value. Next, it is tuned to a channel frequency of a digital cable channel corresponding to the details channel number when the details channel number exists in a digital channel number list. Alternatively, the emergency alert message includes a details channel source field which indicates whether a details channel is a digital or an analog channel. Then, it is tuned to a channel frequency of one of a digital cable channel and an analog cable channel based upon a value of the details channel source field.

REFERENCES:
patent: 5495283 (1996-02-01), Cowe
patent: 5657414 (1997-08-01), Lett et al.
patent: 7159230 (2007-01-01), Manson et al.
patent: 2002/0197968 (2002-12-01), Yamanishi
patent: 2005/0015799 (2005-01-01), Park
patent: 2005/0229206 (2005-10-01), Pugel et al.

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