DTV transmitting system and receiving system and method of processing broadcast data

Patent metadata

Field	Value
Publication number	US-RE45783-E
Application number	US-201414320059-A
Country	US
Kind code	E1
Filing date	Jun 30, 2014
Priority date	May 23, 2006
Publication date	Oct 27, 2015
Grant date	Oct 27, 2015

Abstract

A DTV transmitting system includes a frame encoder, a randomizer, a block processor, a group formatter, a deinterleaver, and a packet formatter. The frame encoder builds an enhanced data frame and encodes the frame two times for first and second error correction, respectively. It further permutes a plurality of encoded data frames. The randomizer randomizes the permuted enhanced data, and the block processor codes the randomized data at a rate of 1/N1. The group formatter forms a group of enhanced data having one or more data regions and inserts the data coded at the rate of 1/N1 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 enhanced data packets.

First claim

What is claimed is:

1. A digital television (DTV) transmitting system for processing digital broadcast data, the DTV transmitting system comprising:
a first randomizer for randomizing enhanced data; a Reed-Solomon (RS) frame encoder for generating an RS frame by adding RS parity data to bottom ends of columns of an RS frame payload and adding Cyclic Redundancy Check (CRC) data to right ends of rows of the RS frame payload having the RS parity data, the RS frame payload including the randomized enhanced data; a block processor for encoding a first data portion in the RS frame with a first coding rate and encoding a second data portion in the RS frame with a second coding rate; a group formatter for mapping the encoded first data portion into a first region of at least one data group, mapping the encoded second data portion into a second region of the at least one data group, and adding known data sequences, signaling information, RS parity data place holders, main data place holders and MPEG header data place holders to the at least one data group; a packet formatter for removing the RS parity data place holders and the main data place holders and replacing the MPEG header data place holders with MPEG header data in order to output enhanced data packets; a multiplexer for multiplexing the enhanced data packets with main data packets including main data; a second randomizer for randomizing the multiplexed main data packets and the MPEG header data in the multiplexed enhanced data packets; a trellis encoding unit for trellis encoding data of the randomized main data packets and data of the enhanced data packets having the randomized MPEG header data; and a transmitting unit for transmitting the trellis encoded data.

2. The DTV transmitting system of claim 1 , wherein the first coding rate is ¼ and the second coding rate is ½.

3. The DTV transmitting system of claim 1 , wherein the first coding rate is ½ and the second coding rate is ¼.

4. The DTV transmitting system of claim 1 , wherein the first coding rate is ¼ and the second coding rate is ¼.

5. The DTV transmitting system of claim 1 , wherein the first coding rate is ½ and the second coding rate is ½.

6. The DTV transmitting system of claim 1 , wherein at least two of the known data sequences have different lengths.

7. The DTV transmitting system of claim 1 , wherein at least two of the known data sequences are spaced 16 segments apart.

8. A method of processing digital broadcast data in a digital television (DTV) transmitting system, the method comprising:
randomizing, by a first randomizer, enhanced data; generating, by a Reed-Solomon (RS) frame encoder, an RS frame by adding RS parity data to bottom ends of columns of an RS frame payload and adding Cyclic Redundancy Check (CRC) data to right ends of rows of the RS frame payload having the RS parity data, the RS frame payload including the randomized enhanced data; encoding, by a block processor, a first data portion in the RS frame with a first coding rate; encoding, by the block processor, a second data portion in the RS frame with a second coding rate; mapping the encoded first data portion into a first region of at least one data group; mapping the encoded second data portion into a second region of the at least one data group; adding known data sequences, signaling information, RS parity data place holders, main data place holders and MPEG header data place holders to the at least one data group; removing the RS parity data place holders and the main data place holders; replacing the MPEG header data place holders with MPEG header datain order to output enhanced data packets; multiplexing, by a multiplexer, the enhanced data packets with main data packets including main data; randomizing, by a second randomizer, the multiplexed main data packets and the MPEG header data in the multiplexed enhanced data packets; trellis encoding, by a trellis encoding unit, data of the randomized main data packets and data of the enhanced data packets having the randomized MPEG header data; and transmitting the trellis encoded data.

9. The method of claim 8 , wherein the first coding rate is ¼ and the second coding rate is ½.

10. The method of claim 8 , wherein the first coding rate is ½ and the second coding rate is ¼.

11. The method of claim 8 , wherein the first coding rate is ¼ and the second coding rates is ¼.

12. The method of claim 8 , wherein the first coding rate is ½ and the second coding rates is ½.

13. The method of claim 8 , wherein at least two of the known data sequences have different lengths.

14. The method of claim 8 , wherein at least two of the known data sequences are spaced 16 segments apart.

15. A broadcast transmitting system for processing digital broadcast data, the broadcast transmitting system comprising:
a first randomizer to randomize enhanced data; a Reed-Solomon (RS) frame encoder to generate an RS frame by adding RS parity data to bottom ends of columns of an RS frame payload including the randomized enhanced data and adding Cyclic Redundancy Check (CRC) data to right ends of rows of the RS frame payload having the RS parity data; a block processor to encode a part of data in the RS frame with a first coding rate and to encode another part of data in the RS frame with a second coding rate; a group formatter to map the data encoded with the first coding rate into a first region of at least one data group, to map the data encoded with the second coding rate into a second region of the at least one data group, and to add known data sequences, signaling information, RS parity data place holders, main data place holders and MPEG header data place holders to the at least one data group; a packet formatter to remove the RS parity data place holders and the main data place holders and to replace the MPEG header data place holders with MPEG header data in order to output enhanced data packets; a multiplexer to multiplex the enhanced data packets with main data packets including main data; a second randomizer to randomize the multiplexed main data packets and the MPEG header data in the multiplexed enhanced data packets; an interleaver to interleave data of the randomized main data packets and data of the enhanced data packets having the randomized MPEG header data; a trellis encoding unit to trellis encode the interleaved data; and a transmitting unit to transmit the trellis encoded data, wherein at least one memory in the trellis encoding unit is initialized at each start of the known data sequences.

16. The broadcast transmitting system of claim 15, wherein the first coding rate is ¼ and the second coding rate is ½.

17. The broadcast transmitting system of claim 15, wherein the first coding rate is ½ and the second coding rate is ¼.

18. The broadcast transmitting system of claim 15, wherein the first coding rate is ¼ and the second coding rate is ¼.

19. The broadcast transmitting system of claim 15, wherein the first coding rate is ½ and the second coding rate is ½.

20. The broadcast transmitting system of claim 15, wherein at least two of the known data sequences have different lengths.

21. The broadcast transmitting system of claim 15, wherein at least two of the known data sequences are spaced 16 segments apart.

22. A method of processing digital broadcast data in a broadcast transmitting system, the method comprising:
randomizing, by a first randomizer, enhanced data; generating, by a Reed-Solomon (RS) frame encoder, an

Assignees

• Lg Electronics Inc

Inventors

• Lee Hyoung Gon
• Choi In Hwan
• Kim Byoung Gill
• Song Won Gyu
• Kim Jong Moon
• Kim Jin Woo

Classifications

• H04N21/2383

  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 title

• H03M13/00 Primary

  Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes (error detection or error correction for analogue/digital, digital/analogue or code conversion H03M1/00 – H03M11/00; specially adapted for digital computers G06F11/08; for information storage based on relative movement between record carrier and transducer G11B, e.g. G11B20/18; for static stores G11C) · CPC title

• H03M13/2909

  Product codes · CPC title

• H03M13/29

  combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes · CPC title

• H03M13/1515

  Reed-Solomon codes · CPC title