Digital broadcasting system and method of processing data in the digital broadcasting system

• US 8,370,707 B2
• Filed: 12/07/2011
• Issued: 02/05/2013
• Est. Priority Date: 08/24/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, In Hwan, Kwak, Kook Yeon, Kim, Byoung Gill, Kim, Jin Woo, Song, Won Gyu, Lee, Hyoung Gon
• Primary Examiner(s): BONZO, BRYCE P
• Application Number:
  US13/314,098
• Publication Number:
  US 20120144266A1
• Time in Patent Office: 426 Days
• Field of Search: 714/758
• US Class Current: 714/758
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 2025/03382 Single of vestigal sideband
• CPC Class Codes: H04L 27/06 Demodulator circuits; Receiver circuits

Abstract

A digital broadcast transmitting and a method of processing broadcast data in a digital broadcast transmitting system are disclosed. The method includes randomizing mobile service data; RS encoding and CRC encoding the randomized mobile service data to build an RS frame; dividing the built RS frame into L (L>1) number of portions and adding K bytes (K≧0) of dummy data to one of the portions; encoding data in the portions at a code rate of 1/H (H>1); first interleaving the encoded data; mapping the first interleaved data into data groups and adding known data sequences and transmission parameters to each of the data groups, deinterleaving data of the data groups; second interleaving the deinterleaved data; and transmitting a transmission frame including the second interleaved data.

Claims

1. A method of processing broadcast data in a digital broadcast transmitting system, the method comprising:

randomizing, by a randomizer, mobile service data;

Reed-Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding the randomized mobile service data in order to build an RS frame;

dividing the built RS frame into L portions, wherein L is greater than 1;

adding K bytes of dummy data to one of the L portions, wherein K is greater than or equal to 0;

encoding data in the L portions at a code rate of 1/H, wherein H is greater than 1;

interleaving the encoded data in order to output first interleaved data;

mapping the first interleaved data into data groups;

adding known data sequences and transmission parameters to each of the data groups;

deinterleaving data of the data groups;

interleaving, by an interleaver, the deinterleaved data in order to output second interleaved data; and

transmitting a transmission frame including the second interleaved data,

wherein the transmission frame comprises M consecutive sub frames,

wherein each of the M consecutive sub frames comprises N consecutive slots,

wherein one of the data groups is transmitted through one of the N consecutive slots,

wherein the transmission parameters include information for indicating a current sub frame number within the transmission frame and information for indicating a current slot number within a sub frame of the transmission frame, and

wherein M and N are integers greater than 1.

2. The method of claim 1, wherein the transmission parameters further include Serial Concatenated Convolutional Coding (SCCC) outer code mode information for indicating the code rate of 1/H.

3. The method of claim 2, wherein encoding the data in the L portions comprises:

converting each of the L portions to SCCC blocks; and

encoding data in the SCCC blocks at the code rate of 1/H according to the SCCC outer code mode information.

4. The method of claim 1, wherein H is equal to 2 or 4.

5. The method of claim 1, wherein M is equal to 5 and N is equal to 16.

6. The method of claim 1, wherein the RS frame comprises an RS frame payload including the randomized mobile service data, RS parity data added to bottom ends of columns of the RS frame payload, and CRC data added to right ends of rows of the RS frame payload including the RS parity data.

7. A digital broadcast transmitting system comprising:

a randomizer for randomizing mobile service data;

a Reed-Solomon (RS) frame encoder for RS encoding and Cyclic Redundancy Check (CRC) encoding the randomized mobile service data in order to build an RS frame, dividing the built RS frame into L portions, and adding K bytes of dummy data to one of the L portions, wherein L is greater than 1 and K is greater than or equal to 0;

a block processor for encoding data in the L portions at a code rate of 1/H and interleaving the encoded data in order to output first interleaved data, wherein H is greater than 1;

a group formatting unit for mapping the first interleaved data into data groups, adding known data sequences and transmission parameters to each of the data groups and deinterleaving data of the data groups;

an interleaver for interleaving the deinterleaved data in order to output second interleaved data; and

a transmitting unit for transmitting a transmission frame including the second interleaved data,

wherein the transmission frame comprises M consecutive sub frames,

wherein each of the M consecutive sub frames comprises N consecutive slots,

wherein one of the data groups is transmitted through one of the N consecutive slots,

wherein the transmission parameters include information for indicating a current sub frame number within the transmission frame and information for indicating a current slot number within a sub frame of the transmission frame, and

wherein M and N are integers greater than 1.

8. The digital broadcast transmitting system of claim 7, wherein the transmission parameters further include Serial Concatenated Convolutional Coding (SCCC) outer code mode information for indicating the code rate of 1/H.

9. The digital broadcast transmitting system of claim 8, wherein the block processor converts each of the L portions to SCCC blocks and encodes data in the SCCC blocks at the code rate of 1/H according to the SCCC outer code mode information.

10. The digital broadcast transmitting system of claim 7, wherein H is equal to 2 or 4.

11. The digital broadcast transmitting system of claim 7, wherein M is equal to 5 and N is equal to 16.

12. The digital broadcast transmitting system of claim 7, wherein the RS frame comprises an RS frame payload including the randomized mobile service data, RS parity data added to bottom ends of columns of the RS frame payload, and CRC data added to right ends of rows of the RS frame payload including the RS parity data.