Broadcasting transmitting system and method of processing broadcast data in the broadcast transmitting system

• US 9,094,159 B2
• Filed: 06/01/2012
• Issued: 07/28/2015
• Est. Priority Date: 07/04/2007
• Status: Active Grant

• 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, Lee, Hyoung Gon, Song, Won Gyu
• Primary Examiner(s): Abraham, Esaw
• Application Number:
  US13/486,987
• Publication Number:
  US 20120240005A1
• Time in Patent Office: 1,152 Days
• Field of Search: 714/755, 714/776, 714/782, 714/784
• US Class Current: 1/1
• CPC Class Codes: G06F 11/10 Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
• CPC Class Codes: H03M 13/251 with block coding
• CPC Class Codes: H03M 13/271 Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations
• 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 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H04H 20/30 by a single channel
• CPC Class Codes: H04H 20/57 for mobile receivers
• CPC Class Codes: H04H 40/27 specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0042 Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape H04L1/0067 takes precedence
• 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 1/007 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 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 2025/03382 Single of vestigal sideband
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 27/066 Carrier recovery circuits H04L27/2271 takes precedence
• CPC Class Codes: H04L 63/08 : for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04N 21/23608 : Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/2365 : Multiplexing of several video streams
• 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 21/2385 : Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• 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 21/4347 : Demultiplexing of several video streams
• CPC Class Codes: H04N 21/4381 : Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• 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 21/44008 : involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59
• CPC Class Codes: H04N 21/6433 : Digital Storage Media - Command and Control Protocol [DSM-CC]

Abstract

A broadcast transmitting system and method are provided. The method includes performing RS encoding and CRC encoding on mobile service data bytes to build an RS frame, dividing the RS frame into a plurality of portions, adding K bytes of dummy data to one of the portions, converting data bytes of the plurality of portions into data bits, encoding each of the data bits to output data symbols, interleaving the data symbols, converting the interleaved data symbols into data bytes, forming data groups, inserting a plurality of known data sequences in each data group, deinterleaving data of the data groups, RS encoding mobile service data packets to insert first RS parity data in the data packets, interleaving data of the RS-encoded data packets, trellis encoding the interleaved data, recalculating second RS parity data based on initialization data and replacing the first RS parity data with the second RS parity data.

Claims

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

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

dividing the RS frame into a plurality of RS frame portions;

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

converting data bytes of the plurality of RS frame portions into data bits;

encoding each of the converted data bits at a coding rate of 1/H in order to output data symbols, wherein H is greater than or equal to 2;

interleaving the data symbols;

converting the interleaved data symbols into data bytes;

forming data groups including mobile service data corresponding to the converted data bytes and inserting a plurality of known data sequences in each of the data groups;

deinterleaving data of the data groups;

RS encoding mobile service data packets including the deinterleaved data to insert first RS parity data in the mobile service data packets;

interleaving data of the RS-encoded mobile service data packets;

trellis encoding the interleaved data in a trellis encoding unit, wherein at least one memory included in the trellis encoding unit is initialized by initialization data at a start of each of the plurality of known data sequences;

recalculating second RS parity data based on the initialization data;

replacing the first RS parity data with the second RS parity data;

outputting the second RS parity data to the trellis encoding unit; and

modulating a broadcast signal including the trellis-encoded data,

wherein at least two of the plurality of known data sequences in the broadcast signal differ from each other in length,

wherein at least two of the plurality of known data sequences in the broadcast signal are spaced 16 segments apart,

wherein one of the plurality of known data sequences in the broadcast signal includes a first M-symbol sequence and a second M-symbol sequence that have a first pattern,

wherein the other of the plurality of known data sequences in the broadcast signal include an N-symbol sequence that has a second pattern other than the first pattern, and

wherein N is greater than M.

2. The method of claim 1, further comprising:

randomizing the mobile service data bytes; and

outputting the randomized mobile service data bytes for the RS encoding and CRC encoding.

3. The method of claim 2, further comprising:

randomizing MPEG header data of the mobile service data packets; and

outputting the mobile service data packets including the randomized MPEG header data for the RS encoding.

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

5. A broadcast transmitting system comprising:

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

a byte to bit converter for converting data bytes of the plurality of RS frame portions into data bits;

a second encoder for encoding each of the converted data bits at a coding rate of 1/H in order to output data symbols, wherein H is greater than or equal to 2;

a first interleaver for interleaving the data symbols;

a symbol to byte converter for converting the interleaved data symbols into data bytes;

a group formatting unit for forming data groups including mobile service data corresponding to the converted data bytes and inserting a plurality of known data sequences in each of the data groups;

a deinterleaver for deinterleaving data of the data groups;

a third encoder for RS encoding mobile service data packets including the deinterleaved data to insert first RS parity data in the mobile service data packets;

a second interleaver for interleaving data of the RS-encoded mobile service data packets;

a fourth encoder for trellis encoding the interleaved data, wherein at least one memory included in the fourth encoder is initialized by initialization data at a start of each of the plurality of known data sequences;

a backward compatible processor for recalculating second RS parity data based on the initialization data, replacing the first RS parity data with the second RS parity data and outputting the second RS parity data to the fourth encoder; and

a modulator for modulating a broadcast signal including the trellis-encoded data,

wherein at least two of the plurality of known data sequences in the broadcast signal differ from each other in length,

wherein at least two of the plurality of known data sequences in the broadcast signal are spaced 16 segments apart,

wherein one of the plurality of known data sequences in the broadcast signal includes a first M-symbol sequence and a second M-symbol sequence that have a first pattern,

wherein the other of the plurality of known data sequences in the broadcast signal include an N-symbol sequence that has a second pattern other than the first pattern, and

wherein N is greater than M.

6. The broadcast transmitting system of claim 5, further comprising:

a first randomizer for randomizing the mobile service data bytes and outputting the randomized mobile service data bytes to the first encoder.

7. The broadcast transmitting system of claim 6, further comprising:

a second randomizer for randomizing MPEG header data of the mobile service data packets and outputting the mobile service data packets including the randomized MPEG header data to the third encoder.

8. The broadcast transmitting system of claim 5, wherein the RS frame comprises an RS frame payload including the mobile service data bytes, RS parity data bytes added at bottom ends of columns of the RS frame payload, and CRC data bytes added at right ends of rows of the RS frame payload including the RS parity data bytes.