Disclosed are a method and several embodiments for issuing and receiving a
product notice message by incorporating a product notice message into at
least one of a control data stream and a program data stream carried in
digital broadcast data stream. This is accomplished by combining at least
one of a control data stream and a program data stream into a
time-multiplexed data stream, splintering the multiplexed data stream
into a plurality of sub-streams, generating a corresponding plurality of
modulated carriers according to each of the sub-streams, combining the
plurality of modulated carriers into a composite radio frequency signal
and then radiating the composite radio frequency signal. In order to
receive the signal, the composite radio frequency signal that includes a
plurality of modulated carriers is received and each carrier therein is
demodulated into a plurality of corresponding data sub-stream. These are
then combined into a time-multiplexed, multi-channel data stream. A
channel is these selected from at least one of the control channel and
the program channel which are typically included in the time-multiplexed,
multi-channel data stream. A product notice is extracted from the
selected channel and presented to a user.