Digital broadcasting system and data processing method

• US 8,660,147 B2
• Filed: 07/20/2010
• Issued: 02/25/2014
• Est. Priority Date: 06/28/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Jae Hyung, Choi, In Hwan, Hong, Ho Taek, Kwak, Kook Yeon, Kim, Byoung Gill, Suh, Jong Yeul, Kim, Jin Pil, Song, Won Gyu, Lee, Chul Soo, Kim, Jin Woo, Lee, Hyoung Gon, Lee, Joon Hui
• Primary Examiner(s): Smith, Marcus R
• Assistant Examiner(s): Mais, Mark A
• Application Number:
  US12/840,234
• Publication Number:
  US 20100287444A1
• Time in Patent Office: 1,316 Days
• Field of Search: None
• US Class Current: 370/478
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 20/95 characterised by a specific format, e.g. an encoded audio stream
• 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 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04N 21/234 Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/64322 IP

Abstract

A digital broadcasting system and a method of processing data are disclosed, which are robust to error when mobile service data are transmitted. To this end, additional encoding is performed for the mobile service data, whereby it is possible to strongly cope with fast channel change while giving robustness to the mobile service data.

Claims

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

encoding a 2-dimensional Reed-Solomon (RS) frame through which an ensemble including a service of mobile data is RS cyclic redundancy check (RS-CRC) encoded according to an RS frame mode, wherein the encoded RS frame is separated into a plurality of frame portions;

dividing one of the plurality of frame portions into serial concatenated convolutional coding (SCCC) blocks according to an SCCC block mode;

performing outer encoding of SCCC data in the SCCC blocks according to an SCCC code mode;

outputting data blocks including the outer-encoded data;

forming a data group including signaling information, known data sequences and the data blocks, wherein the signaling information includes first channel data having cross layer information between a physical layer and an upper layer and second channel data indicating a version of the first channel data, the first channel data block-interleaved by writing the first channel data row-by-row from left-to-right and top-to-bottom and reading the first channel data column-by-column from top-to-bottom and left-to-right;

interleaving data in the data group, wherein the interleaved data group includes a plurality of regions to which the data blocks are mapped according to the SCCC block mode, the SCCC block mode identifying a relationship between the plurality of regions and the data blocks;

trellis encoding the interleaved data in a trellis encoder; and

transmitting a transmission frame including the trellis-encoded data,

wherein the transmission frame includes a plurality of sub-frames,

wherein the second channel data includes information indicating a current sub-frame number within the transmission frame,

wherein a payload of the RS frame includes 187 transport packets of the mobile data, and

wherein a row of the payload of the RS frame includes a transport packet of the mobile data, the transport packet including a 2-byte header.

2. The method of claim 1, wherein the second channel data further includes information for an SCCC outer code mode for a region of the plurality of regions.

3. The method of claim 1, wherein the second channel data further includes information for the SCCC block mode.

4. The method of claim 1, wherein the two-byte header includes an error indicator indicating whether an error is detected in the transport packet.

5. The method of claim 1, wherein the transport packet further includes an internet protocol (IP) datagram.

6. The method of claim 1, wherein the data blocks correspond to a plurality of contiguous vestigial sideband (VSB) data segments.

7. A method of receiving a broadcast signal in a receiver, the method comprising:

receiving the broadcast signal including a transmission frame, wherein the transmission frame includes a plurality of sub-frames and a parade of data groups in the broadcast signal is received during slots within the transmission frame, each of the parade of data groups including signaling information, known data sequences, data blocks of mobile data and a plurality of regions to which the data blocks are mapped according to a serial concatenated convolutional coding (SCCC) block mode, the SCCC block mode identifying a relationship between the plurality of regions and the data blocks and the signaling information including first channel data and second channel data, the first channel data block-interleaved by writing the first channel data row-by-row from left-to-right and top-to-bottom and reading the first channel data column-by-column from top-to-bottom and left-to-right;

demodulating the broadcast signal and obtaining the first channel data and the second channel data from the signaling information, first channel data having cross layer information between a physical layer and an upper layer and the second channel data indicating a version of the first channel data and including information indicating a current sub-frame number within the transmission frame;

building a Reed-Solomon (RS) frame corresponding to an ensemble of a service of the mobile data using the data groups;

performing error detection on the RS frame; and

performing error correction decoding on data in the RS frame according to an RS code mode,

wherein a payload of the RS frame includes 187 transport packets of the mobile data, and

wherein a row of the payload of the RS frame includes a transport packet of the mobile data, the transport packet including a 2-byte header.

8. The method of claim 7, wherein the second channel data further includes information for an SCCC outer code mode for a region of the plurality of regions.

9. The method of claim 7, wherein the second channel data further includes information for the SCCC block mode.

10. The method of claim 7, wherein the two-byte header includes an error indicator indicating whether an error is detected in the transport packet.

11. The method of claim 7, wherein the transport packet further includes an internet protocol (IP) datagram.

12. The method of claim 7, wherein the data blocks correspond to a plurality of contiguous vestigial sideband (VSB) data segments.