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

• US 8,201,050 B2
• Filed: 08/26/2011
• Issued: 06/12/2012
• Est. Priority Date: 07/04/2007
• Status: Expired due to Fees

• 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 T
• Application Number:
  US13/219,520
• Publication Number:
  US 20110314353A1
• Time in Patent Office: 291 Days
• Field of Search: 714/755, 714/758, 714/784, 365/265
• US Class Current: 714/755
• 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 a method of processing broadcast data in the broadcast transmitting system are disclosed. Herein, the broadcast transmitting system includes a group formatting unit for mapping mobile service data into at least one region of a plurality of regions within a data group and adding a plurality of known data sequences to the data group, a deinterleaver for deinterleaving data in the data group, a first multiplexer for multiplexing mobile service data packets including the deinterleaved data with main service data packets including main service data, an interleaver for interleaving data in the multiplexed data packets, a trellis encoding unit for trellis encoding the interleaved data, a second multiplexer for multiplexing the trellis-encoded data with segment synchronization data and field synchronization data, and a modulator for modulating a broadcast signal including the multiplexed data.

Claims

1. A broadcast transmitting system comprising:

a group formatting unit for mapping mobile service data into at least one region of a plurality of regions within a data group and adding a plurality of known data sequences to the data group;

a deinterleaver for deinterleaving data in the data group;

a first multiplexer for multiplexing mobile service data packets including the deinterleaved data with main service data packets including main service data;

an interleaver for interleaving data in the multiplexed data packets;

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

a second multiplexer for multiplexing the trellis-encoded data with segment synchronization data and field synchronization data; and

a modulator for modulating a broadcast signal including the multiplexed 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, and the rest 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 broadcast transmitting system of claim 1, wherein the group formatting unit inserts main service data place holders and Moving Picture Experts Group (MPEG) header data place holders into the data group.

3. The broadcast transmitting system of claim 2, further comprising:

a packet formatter for removing the main service data place holders in the data group in which data are deinterleaved and replacing the MPEG header data place holders in the data group in which data are deinterleaved with MPEG header data, thereby outputting the mobile service data packets.

4. The broadcast transmitting system of claim 1, further comprising:

a Reed-Solomon (RS) frame encoder for RS-encoding and Cyclic Redundancy Check (CRC)-encoding the mobile service data to build an RS frame, wherein the RS frame comprises an RS frame payload including the mobile service data, RS parity data added at bottom ends of columns of the RS frame payload, and CRC data added at right ends of rows of the RS frame payload including the RS parity data.

5. The broadcast transmitting system of claim 4, wherein the RS frame encoder divides the RS frame into L number of portions and adds K bytes of dummy data to one of the portions, wherein L is greater than 1 and K is equal to or greater than 0.

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

mapping, by a group formatting unit, mobile service data into at least one region of a plurality of regions within a data group and adding a plurality of known data sequences to the data group;

deinterleaving, by a deinterleaver, data in the data group;

multiplexing, by a first multiplexer, mobile service data packets including the deinterleaved data with main service data packets including main service data;

interleaving, by an interleaver, data in the multiplexed data packets;

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

multiplexing, by a second multiplexer, the trellis-encoded data with segment synchronization data and field synchronization data; and

modulating, by a modulator, a broadcast signal including the multiplexed 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, and the rest 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.

7. The method of claim 6, wherein mapping mobile service data comprises inserting main service data place holders and MPEG header data place holders into the data group.

8. The method of claim 7, further comprising:

removing the main service data place holders in the data group in which data are deinterleaved; and

replacing the MPEG header data place holders in the data group in which data are deinterleaved with MPEG header data, thereby outputting the mobile service data packets.

9. The method of claim 6, further comprising:

Reed-Solomon (RS)-encoding and Cyclic Redundancy Check (CRC)-encoding the mobile service data to build an RS frame, wherein the RS frame comprises an RS frame payload including the mobile service data, RS parity data added at bottom ends of columns of the RS frame payload, and CRC data added at right ends of rows of the RS frame payload including the RS parity data.

10. The method of claim 9, further comprising:

dividing the RS frame into L number of portions; and

adding K bytes of dummy data to one of the portions,

wherein L is greater than 1 and K is equal to or greater than 0.