DTV transmitting system and method of processing broadcast data

• US 8,429,504 B2
• Filed: 03/03/2010
• Issued: 04/23/2013
• Est. Priority Date: 04/29/2006
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Hyoung Gon, Choi, In Hwan, Kwak, Kook Yeon, Kim, Jong Moon, Song, Won Gyu, Kim, Byoung Gill, Kim, Jin Woo
• Primary Examiner(s): LAMARRE, GUY J
• Application Number:
  US12/717,111
• Publication Number:
  US 20100223528A1
• Time in Patent Office: 1,147 Days
• Field of Search: 714/752, 714/756, 714/758, 714/776, 714/780, 714/784, 725/118
• US Class Current: 714/776
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/2703 the interleaver involving at least two directions
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H03M 13/6522 Intended application, e.g. transmission or communication standard
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0047 Decoding adapted to other signal detection operation in conjunction with sequence estimation or equalization H04L25/03286
• CPC Class Codes: H04L 1/0054 Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/0061 Error detection codes
• 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: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• 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 21/4348 Demultiplexing of additional data and video streams
• 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

Abstract

A DTV transmitting system includes an encoder, a randomizer, a block processor, a group formatter, a deinterleaver, and a packet formatter. The encoder codes enhanced data for error correction, permutes the coded data, and further codes the permuted data for error detection. The randomizer randomizes the coded enhanced data, and the block processor codes the randomized data at an effective coding rate of 1/H. The group formatter forms a group of enhanced data having data regions, and inserts the coded enhanced data into at least one of the data regions. The deinterleaver deinterleaves the group of enhanced data, and the packet formatter formats the deinterleaved data into corresponding data bytes.

Claims

1. A receiving system, comprising:

a signal receiving unit for receiving a broadcast signal comprising a data group having a plurality of regions, wherein at least one region of the plurality of regions includes first mobile data encoded at a 1/2 code rate, and wherein at least another region of the plurality of regions includes second mobile data encoded at a 1/4 code rate;

a demodulating unit for demodulating the received broadcast signal;

a first-decoder for performing block decoding on the first and second mobile data in the demodulated broadcast signal; and

a second-decoder for performing error-correction decoding on a Reed-Solomon (RS) frame that comprises at least two packets including the block-decoded first and second mobile data, RS parity data generated based on the at least two packets and Cyclic Redundancy Check (CRC) data generated based on the at least two packets and the RS parity data,

wherein;

the data group includes a plurality of known data sequences and signaling information;

at least two of the plurality of known data sequences have different lengths; and

the signaling information includes information related to the data group.

2. The receiving system of claim 1, wherein the second-decoder builds the RS frame including the block-decoded first and second mobile data and corrects errors generated in the block-decoded first and second mobile data by performing CRC decoding and RS decoding on the RS frame.

3. The receiving system of claim 1, wherein the signal receiving unit receives data of the data group by turning power on or off based on the signaling information.

4. The receiving system of claim 1, further comprising an equalizer for compensating for channel distortion using at least one of the plurality of known data sequences.

5. A method of processing broadcast data in a receiving system, the method comprising:

receiving a broadcast signal comprising a data group having a plurality of regions, wherein at least one region of the plurality of regions includes first mobile data encoded at a 1/2 code rate and wherein at least another region of the plurality of regions includes second mobile data encoded at a 1/4 code rate;

demodulating the received broadcast signal;

performing block decoding on the first and second mobile data in the demodulated broadcast signal; and

performing error-correction decoding on a Reed-Solomon (RS) frame that comprises at least two packets including the block-decoded first and second mobile data, RS parity data generated based on the at least two packets and Cyclic Redundancy Check (CRC) data generated based on the at least two packets and the RS parity data,

wherein;

the data group includes a plurality of known data sequences and signaling information;

at least two of the plurality of known data sequences have different lengths; and

the signaling information includes information related to the data group.

6. The method of claim 5, wherein performing the error-correction decoding comprises:

building the RS frame based on the block-decoded first and second mobile data; and

correcting errors of the block-decoded first and second mobile data by performing CRC decoding and RS decoding on the RS frame.

7. The method of claim 5, wherein receiving the broadcast signal comprises receiving data of the data group by turning power on or off based on the signaling information.

8. The method of claim 5, wherein the signaling information further includes multiplex information.

9. The method of claim 5, further comprising compensating for channel distortion using at least one of the plurality of known data sequences.