Patent ID: 7668209

Claim:
A digital broadcast transmitter, comprising: a pre-processor configured to pre-process traffic information data, wherein the traffic information data is included in a data group, the traffic information data generated from forming the data group, the data group including known data in advance known to the receiver and a digital broadcast transmitter which is inserted continuously and periodically and trellis initialization data located in front of the known data; a multiplexer configured to multiplex the traffic information data with one or more main audio and video, AV, data; a trellis encoder configured to have at least one memory and trellis-encode the multiplexed data, the at least one memory being initialized by the trellis initialization data when data outputted from the multiplexer correspond to a beginning of a sequence of the known data; and a data transmission unit configured to insert synchronization data into the trellis-encoded data, modulate the trellis-encoded data having the synchronization data, and transmit the modulated data, wherein the traffic information data include status information, which includes at least one of information on an average speed of a traffic route and route travel time, and location information associated with the status information.