METHOD AND APPARATUS FOR TRANSMITTING BROADCAST SIGNAL IN TRANSMITTER

• US 20110107176A1
• Filed: 11/02/2010
• Published: 05/05/2011
• Est. Priority Date: 11/02/2009
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Byoung Gill, Lee, Hyoung Gon, SONG, Won Gyu, Choi, In Hwan, Song, Jae Hyung, Mun, Chul Kyu, Kim, Jin Woo
• Granted Patent: US 8,438,449 B2
• Time in Patent Office: Days
• US Class Current: 714/755
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/2966 Turbo codes concatenated with another code, e.g. an outer block code
• CPC Class Codes: H03M 13/2972 Serial concatenation using convolutional component codes
• CPC Class Codes: H03M 13/6538 ATSC VBS systems
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0059 Convolutional codes
• 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

Abstract

A transmitting system, a receiving system, and a method of processing broadcast signals are disclosed. The method for transmitting a broadcast signal includes encoding mobile data for forward error correction (FEC) to build Reed-Solomon (RS) frames, dividing the built RS frames into a number of RS frame portions, dividing one of the RS frame portions into Serially Concatenated Convolutional Code (SCCC) blocks, mapping the SCCC blocks including the convolution-coded data to mobile data blocks according to a SCCC block mode which identifies relationship between the mobile data blocks and the SCCC blocks, forming a data group including the mobile data blocks, forming mobile data packets including data in the data group and, multiplexing a specified number of the mobile data packets, a first scalable number of the mobile data packets, and a second scalable number of main data packets.

Claims

1. A method for transmitting a broadcast signal in a transmitter, the method comprising:

encoding mobile data for forward error correction (FEC) to build Reed-Solomon (RS) frames;

dividing the built RS frames into a number of RS frame portions;

dividing one of the RS frame portions into Serially Concatenated Convolutional Code (SCCC) blocks;

performing convolutional coding on data in the SCCC blocks according to a SCCC code mode;

mapping the SCCC blocks including the convolution-coded data to mobile data blocks according to a SCCC block mode which identifies relationship between the mobile data blocks and the SCCC blocks;

forming a data group including the mobile data blocks, wherein the data group includes a plurality of regions, the plurality of regions includes the mapped mobile data blocks corresponding to a plurality of segments;

forming mobile data packets including data in the data group;

multiplexing a specified number of the mobile data packets, a first scalable number of the mobile data packets, and a second scalable number of main data packets;

wherein one region of the plurality of regions includes the first scalable number of the mobile data packets.

2. The method of claim 1, wherein a sum of the first and second scalable numbers being a specified value, the first scalable number is equal to 11, 20, 29 or 38.

3. The method of claim 1, wherein the SCCC code mode indicates a code rate which is equal to ‘

½

’

, ‘

⅓

’

or ‘

¼

’

.

4. The method of claim 3, wherein the method further comprises:

encoding a primary and secondary RS Frames by different FEC code rates, respectively.

5. The method of claim 4, wherein when the SCCC code rate is ½

or ¼

, data in the primary RS frame is included in specified regions of the plurality of regions.

6. An apparatus for transmitting a broadcast signal in a transmitter, the apparatus comprising:

a first encoder configured to encode mobile data for forward error correction (FEC) to build Reed-Solomon (RS) frames;

a divider configured to divide the built RS frames into a number of RS frame portions;

a first converter configured to divide one of the RS frame portions into Serially Concatenated Convolutional Code (SCCC) blocks;

a second encoder to perform convolutional coding on data in the SCCC blocks according to a SCCC code mode;

a second converter configured to map the SCCC blocks including the convolution-coded data to mobile data blocks according to aSCCC block mode which identifies relationship between the mobile data blocks and the SCCC blocks;

a group formatter configured to form a data group including the mobile data blocks, wherein the data group includes a plurality of regions, the plurality of regions includes the mapped mobile data blocks corresponding to a plurality of segments;

a packet formatter configured to form mobile data packets including data in the data group;

a multiplexer configured to multiplex a specified number of the mobile data packets, a first scalable number of the mobile data packets, and a second scalable number of main data packets;

(S p.

     26)

wherein one region of the plurality of regions includes the first scalable number of the mobile data packets.

7. The method of claim 6, wherein a sum of the first and second scalable numbers being a specified value, the first scalable number is equal to 11, 20, 29 or 38.

8. The method of claim 6, wherein the SCCC code mode indicates a code rate which is equal to ‘

½

’

, ‘

⅓

’

or ‘

¼

’

.

9. The method of claim 8, wherein the apparatus further comprises:

the first encoder configured to encode a primary and secondary RS Frames by different FEC code rates, respectively.

10. The method of claim 9, wherein when the SCCC code rate is ½

or ¼

, data in the primary RS frame is included in specified regions of the plurality of regions.