Method of processing traffic information and digital broadcast system

Abstract

A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.

What is claimed is: 
     
       1. A broadcast transmitter comprising:
 a randomizer for randomizing enhanced data;   a first encoder for Reed Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding the randomized enhanced data;   a block processor for encoding the RS-CRC encoded enhanced data at a coding rate of 1/H, wherein H is greater than 1;   a group formatting unit for forming a data group including the encoded enhanced data and de-interleaving data of the data group, wherein the formed data group further includes main data place holders, known data sequences, trellis initialization data, MPEG header place holders, and RS parity data place holders;   a packet formatter for removing the RS parity data place holders and the main data place holders from the data group in which data are deinterleaved and replacing the MPEG header place holders in the data group, in which data are deinterleaved, with MPEG headers, thereby outputting enhanced data packets;   a first multiplexer for multiplexing the enhanced data packets with main data packets including main data;   a second encoder for adding RS parity data to the multiplexed enhanced and main data packets by RS encoding the main data packets of the multiplexed enhanced and main data packets with a systematic RS encoding scheme and RS encoding the enhanced data packets of the multiplexed enhanced and main data packets with a non-systematic RS encoding scheme; and   an interleaver for interleaving data of the RS-encoded enhanced and main data packets.   
     
     
       2. The broadcast transmitter of  claim 1 , wherein the interleaver is a convolutional data byte interleaver. 
     
     
       3. The broadcast transmitter of  claim 1 , further comprising:
 a trellis encoder for trellis encoding the interleaved data, wherein at least one memory included in the trellis encoder is initialized when the trellis initialization data are inputted to the trellis encoder.   
     
     
       4. The broadcast transmitter of  claim 3 , further comprising:
 a second multiplexer for multiplexing the trellis-encoded data with field synchronization data and segment synchronization data.   
     
     
       5. A method of processing broadcast data in a broadcast transmitter, the method comprising:
 randomizing, by a randomizer, enhanced data;   Reed Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding, by a first encoder, the randomized enhanced data;   encoding, by a block processor, the RS-CRC encoded enhanced data at a coding rate of 1/H, wherein H is greater than 1;   forming a data group including the encoded enhanced data, wherein the formed data group further includes main data place holders, known data sequences, trellis initialization data, MPEG header place holders, and RS parity data place holders;   de-interleaving data of the data group;   removing, by a packer formatter, the RS parity data place holders and the main data place holders from the data group in which data are deinterleaved and replacing the MPEG header place holders in the data group, in which data are deinterleaved, with MPEG headers, thereby outputting enhanced data packets;   multiplexing the enhanced data packets with main data packets including main data;   adding, by a second encoder, RS parity data to the multiplexed enhanced and main data packets by RS encoding the main data packets of the multiplexed enhanced and main data packets with a systematic RS encoding scheme and RS encoding the enhanced data packets of the multiplexed enhanced and main data packets with a non-systematic RS encoding scheme; and   interleaving data of the RS-encoded enhanced and main data packets.   
     
     
       6. The method of  claim 5 , wherein the data of the RS-encoded enhanced and main data packets are interleaved by a convolutional data byte interleaver. 
     
     
       7. The method of  claim 5 , further comprising:
 trellis encoding, by a trellis encoder, the interleaved data, wherein at least one memory included in the trellis encoder is initialized when the trellis initialization data are inputted to the trellis encoder.   
     
     
       8. The method of  claim 7 , further comprising:
 multiplexing the trellis-encoded data with field synchronization data and segment synchronization data.   
     
     
       9. A method for transmitting broadcast data, the method comprising:
 scrambling the broadcast data;   encoding the scrambled broadcast data for forward error correction (FEC);   interleaving the encoded broadcast data;   modulating a data frame including the interleaved broadcast data and known data; and   transmitting a broadcast signal carrying the data frame,   wherein the data frame carries a plurality of units containing one or multiple service components,   wherein the known data are data for synchronization,   wherein at least one of the plurality of units contains system information for a service, and   wherein the system information includes service component identification information for identifying each of the one or more service components, service name information and service description information.   
     
     
       10. The method of claim 9, wherein the data frame comprises a preamble part, a body part, and a tail part. 
     
     
       11. The method of claim 9, wherein the data frame includes a first region including the first type of broadcast data and a second region including the second type of broadcast data and wherein the first region has more dense known data than the second region. 
     
     
       12. The method of claim 9, wherein the known data are periodically located in the data frame.