Patent ID: 7804860

Claim:
A digital broadcast transmitter, comprising: a pre-processor configured to pre-process traffic information data and known data in advance known to the receiver and a digital broadcast transmitter; 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 initialization data when data outputted from the multiplexer correspond to a beginning of a sequence of 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 prediction information on a link travel time and prediction information on link average speed, and location information corresponding to the prediction information, wherein the pre-processor comprises: a RS frame encoder configured to generate data frames including the traffic information data and encode each data frame for at least one or error correction and error detection; a block encoder configured to encode traffic information data encoded by the RS frame encoder with a coding rate of G/H, wherein G and H are positive integers and G is less than H; a group formatter configured to insert the data encoded by the block encoder and the known data into a data group having a plurality of regions; a data deinterleaver configured to deinterleave the data included in the data group; and a packet formatter configured to add header data to the deinterleaved data to generate data packets.