Patent ID: 8136134

Claim:
A system for dynamically transmitting network alert system (NAS) information from a television network to an affiliate station using information embedded in an HDTV signal, comprising: a program data server configured to provide network alert system (NAS) data; a network video programming source configured to provide network video programming; a data inserter configured to insert the NAS data into video line 12 , data ID (DID) 0x53, secondary data ID (SDID) 0x01of vertical ancillary (VANC) space of a high definition television (HDTV) signal to develop a combined network video programming and NAS data signal, the data inserter comprising a data formatter configured to format the NAS data and a multiplexer configured to combine the network video programming and NAS data; and a transmission facility configured to transmit the combined network video programming and NAS data signal.