Transmitting/receiving system and method of processing broadcast signal in transmitting/receiving system

Abstract

An apparatus and method for transmitting digital broadcast signal are provided. The apparatus includes a group formatter to format a data group including mobile service data, where the group formatter further maps the mobile service data into a data group of interleaved format, adds N training sequences into a corresponding location of the data group of interleaved format, adds signaling data into the data group of interleaved format, inserts place holder bytes for MPEG header and non-systematic Reed-Solomon (RS) parity into the data group of interleaved format, and deinterleaves the mobile service data in the data group of interleaved format, a non-systematic RS encoder to non-systematic RS encode the mobile service data in the formatted data group and insert non-systematic RS parity obtained from the non-systematic RS encoding into the formatted data group.

The invention claimed is: 
     
       1. A method for processing a digital broadcast signal at a transmitter, the method comprising:
 formatting the data group including mobile service data, wherein formatting the data group comprises:
 mapping the mobile service data into a data group; 
 adding training sequences into corresponding locations of the data group, wherein at least 5 of the training sequences are spaced M segments apart in the data group, wherein at least 1 of the training sequences is inserted between a first training sequence and a second training sequence of the at least 5 training sequences, and wherein M is an integer; 
 adding signaling data into the data group, wherein the signaling data are added between the first training sequence of the at least 5 training sequences and the at least 1 of the training sequences; 
 inserting place holder bytes for MPEG header and non-systematic Reed-Solomon (RS) parity into the data group; and 
 deinterleaving data in the data group; 
   non-systematic RS encoding the mobile service data in the formatted data group to insert the non-systematic RS parity into locations where the place holder bytes for the non-systematic RS parity were inserted in the formatted data group; and   transmitting a digital broadcast signal including the non-systematic RS-encoded mobile service data.   
     
     
       2. The method of  claim 1 , further comprising:
 Interleaving the non-systematic RS encoded mobile service data.   
     
     
       3. The method of  claim 1 , wherein:
 the at least 1 of the training sequences in the digital broadcast signal has a first K-symbol sequence and a second L-symbol sequence;   K is identical to L; and   the first K-symbol sequence and the second L-symbol sequence have a same data pattern.   
     
     
       4. The method of  claim 1 , wherein the at least 5 of the training sequences in the digital broadcast signal have a same data pattern in common. 
     
     
       5. An apparatus for transmitting a digital broadcast signal, the apparatus comprising:
 a group formatter configured to format a data group including mobile service data, wherein the group formatter is further configured to:
 map the mobile service data into a data group; 
 add N training sequences into corresponding locations of the data group, wherein at least 5 of the training sequences are spaced M segments apart in the data group, wherein at least 1 of the training sequences is inserted between a first training sequence and a second training sequence of the at least 5 training sequences, and wherein M is an integer; 
 add signaling data into the data group, wherein the signaling data are added between the first training sequence of the at least 5 training sequences and the at least 1 of the training sequences; 
 insert place holder bytes for MPEG header and non-systematic Reed-Solomon (RS) parity into the data group; and 
 deinterleave data in the data group; 
   a non-systematic RS encoder configured to non-systematic RS encode the mobile service data in the formatted data group and to insert the non-systematic RS parity into locations where the place holder bytes for the non-systematic RS parity were inserted in the formatted data group; and   a transmission unit configured to transmit a digital broadcast signal including the non-systematic RS-encoded mobile service data.   
     
     
       6. The apparatus of  claim 5 , further comprising:
 a data interleaver configured to Interleave the non-systematic RS encoded mobile service data.   
     
     
       7. The apparatus of  claim 5 , wherein:
 the at least 1 of the training sequences in the digital broadcast signal has a first K-symbol sequence and a second L-symbol sequence;   K is identical to L; and   the first K-symbol sequence and the second L-symbol sequence have a same data pattern.   
     
     
       8. The apparatus of  claim 5 , wherein the at least 5 of the training sequences in the digital broadcast signal have a same data pattern in common. 
     
     
       9. A method of processing data in a broadcast transmitter, the method comprising:
 randomizing broadcast service data;   forward error correction (FEC) encoding the randomized broadcast service data;   dividing the FEC-encoded broadcast service data into a plurality of blocks;   first interleaving the FEC-encoded broadcast service data in block units;   FEC encoding first signaling data for signaling the broadcast service data; and   second interleaving the first interleaved broadcast service data;   transmitting a frame including the second interleaved broadcast service data, the FEC-encoded first signaling data and known data,   wherein the frame includes multiple sub-frames and the sub-frames are concatenated in time within the frame,   wherein the first signaling data include information related to the sub-frames,   wherein the known data are categorized into a first pattern of known data and a second pattern of known data other than the first pattern of known data, and   wherein at least the first pattern of known data or the second pattern of known data is used for channel estimation.    
     
     
       10. The method of claim 9, wherein at least the first pattern of known data or the second pattern of known data is inserted periodically into a specific area of the frame.  
     
     
       11. The method of claim 9, wherein the first signaling data further include information related to the FEC-encoding of the randomized broadcast service data.  
     
     
       12. The method of claim 9, wherein the frame further includes second signaling data that contain information for fast acquisition of the one or more services.  
     
     
       13. The method of claim 12, wherein the first signaling data further include version information of the second signaling data.