A technique for providing secondary data in a single frequency network
(SFN) provides a first forward error correcting (FEC) decoder for
decoding a received coded orthogonal frequency division multiplex (COFDM)
signal. A second FEC decoder is also provided for decoding a received
COFDM signal. When the received COFDM signal includes valid primary data,
the first FEC decoder is utilized to decode the received COFDM signal to
provide general information, i.e., music, sports, etc. When a received
COFDM signal includes valid secondary data, the second FEC decoder is
utilized to decode the received COFDM signal to provide regional
information, e.g., emergency broadcasting information. The received COFDM
signal includes one or more defined COFDM symbols inserted by a
transmitter of the COFDM signal to indicate the valid secondary data and
the invalid primary data.