Broadcast transmitter and method of processing broadcast service data for transmission

• US 9,184,770 B2
• Filed: 01/07/2015
• Issued: 11/10/2015
• 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 T
• Application Number:
  US14/591,698
• Publication Number:
  US 20150171894A1
• Time in Patent Office: 307 Days
• 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 method processing broadcast data in a broadcast transmitter is described. The method may include randomizing broadcast service data, encoding the randomized broadcast service data at a code rate of D/E. D<E, and D and E are integers equal to or greater than 1, respectively. The method further includes first interleaving the encoded broadcast service data, second interleaving the first-interleaved broadcast service data, encoding signaling data for signaling the broadcast service data, interleaving the encoded signaling data, modulating the first-interleaved broadcast service data and the interleaved signaling data, and transmitting the modulated data. The signaling data may include information for indicating the code rate.

Claims

1. A method of processing broadcast service data in a broadcast transmitter, the method comprising:

randomizing broadcast service data;

encoding the randomized broadcast service data at a code rate of D/E, wherein D<

E, and wherein D and E are integers equal to or greater than 1, respectively;

first interleaving the encoded broadcast service data;

second interleaving the first-interleaved broadcast service data;

encoding signaling data for signaling the broadcast service data;

interleaving the encoded signaling data;

modulating the second-interleaved broadcast service data and the interleaved signaling data; and

transmitting the modulated data,

wherein the signaling data include information for indicating the code rate.

2. The method of claim 1, wherein the signaling data further include information to identify a service provided by the broadcast service data.

3. The method of claim 1, further comprising:

randomizing the signaling data.

4. The method of claim 1, wherein the broadcast service data are transmitted through one or more delivery units included in a frame.

5. The method of claim 4, wherein the code rate is independently applied to each of the one or more delivery units.

6. The method of claim 4, wherein the signaling data further include a number of delivery units contained in the frame.

7. A broadcast transmitter for processing broadcast service data, the broadcast transmitter comprising:

a randomizer configured to randomize broadcast service data;

a first encoder configured to encode the randomized broadcast service data at a code rate of D/E, wherein D<

E, and wherein D and E are integers equal to or greater than 1, respectively;

a first interleaver configured to first interleave the encoded broadcast service data;

a second interleaver configured to second interleave the first-interleaved broadcast service data;

a second encoder configured to encode signaling data for signaling the broadcast service data;

a third interleaver configured to interleave the encoded signaling data;

a modulator configured to modulate the second-interleaved broadcast service data and the interleaved signaling data; and

a transmitting unit configured to transmit the modulated data,

wherein the signaling data include information for indicating the code rate.

8. The broadcast transmitter of claim 7, wherein the signaling data further include information to identify a service provided by the broadcast service data.

9. The broadcast transmitter of claim 7, wherein the randomizer is further configured to randomize the signaling data.

10. The broadcast transmitter of claim 7, wherein the broadcast service data are transmitted through one or more delivery units included in a frame.

11. The broadcast transmitter of claim 10, wherein the code rate is independently applied to each of the one or more delivery units.

12. The broadcast transmitter of claim 10, wherein the signaling data further include a number of delivery units contained in the frame.