Digital broadcasting receiver and method for controlling the same

• US 8,745,672 B2
• Filed: 07/14/2011
• Issued: 06/03/2014
• Est. Priority Date: 09/21/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Park, Sang Kil, Choi, In Hwan, Song, Jae Hyung, Lee, Chul Soo
• Primary Examiner(s): Kumar, Pankaj
• Assistant Examiner(s): FLYNN, RANDY A
• Application Number:
  US13/183,367
• Publication Number:
  US 20110276999A1
• Time in Patent Office: 1,055 Days
• Field of Search: 725 62- 63, 455/3.01, 455/3.02, 455/403, 370/312, 375/316
• US Class Current: 725/62
• CPC Class Codes: H04H 20/30 by a single channel
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 20/57 for mobile receivers
• CPC Class Codes: H04L 9/30 Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/23605 Creation or processing of packetized elementary streams [PES]
• CPC Class Codes: H04N 21/23611 Insertion of stuffing data into a multiplex stream, e.g. to obtain a constant bitrate synchronisation arrangements in time-division multiplex systems using bit stuffing for systems with different or fluctuating information rates H04J3/073
• 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 21/2362 Generation or processing of Service Information [SI]
• 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 21/26603 for automatically generating descriptors from content, e.g. when it is not made available by its provider, using content analysis techniques
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/8126 involving additional data, e.g. news, sports, stocks, weather forecasts

Abstract

A method of processing broadcast data includes: receiving a broadcast signal including a group including mobile service data, FIC data, TPC data and known data sequences; demodulating the broadcast signal; compensating channel distortion generated in the demodulated broadcast signal based upon at least one of the known data sequences; decoding the FIC data and the TPC data from the channel distortion compensated broadcast signal; extracting the signaling information table from the channel distortion compensated broadcast signal; identifying a stream where keys to decrypt the mobile service data are obtained using the extracted signaling information table; and decrypting the mobile service data using the keys. The group further includes data blocks. First, fourth, fifth and sixth known data sequences are inserted into third, fifth, sixth and seventh data blocks, respectively. Second and third known data sequences are inserted into a fourth data block.

Claims

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

receiving a broadcast signal comprising a group, the group including mobile service data, fast information channel (FIC) data, transmission parameter channel (TPC) data and known data sequences, wherein the FIC data includes information for rapid mobile service acquisition, wherein the TPC data includes FIC version information for indicating an update of the FIC data, wherein the mobile service data is included in a Reed-Solomon (RS) frame belonging to an ensemble, and wherein the ensemble comprises a signaling information table including access information of the mobile service data and identification information for identifying a stream where keys to decrypt the mobile service data are obtained;

demodulating the received broadcast signal;

compensating channel distortion generated in the demodulated broadcast signal based upon at least one of the known data sequences;

decoding the FIC data and the TPC data from the channel distortion compensated broadcast signal;

extracting the signaling information table from the channel distortion compensated broadcast signal;

identifying the stream where the keys to decrypt the mobile service data are obtained using the extracted signaling information table; and

decrypting the mobile service data using the keys,

wherein the group further includes data blocks,

wherein a first known data sequence of the known data sequences is inserted into a third data block of the data blocks,

wherein a second known data sequence and a third known data sequence of the known data sequences are inserted into a fourth data block of the data blocks,

wherein a fourth known data sequence of the known data sequences is inserted into a fifth data block of the data blocks,

wherein a fifth known data sequence of the known data sequences is inserted into a sixth data block of the data blocks, and

wherein a sixth known data sequence of the known data sequences is inserted into a seventh data block of the data blocks.

2. The method of claim 1, further comprising obtaining the keys from the identified stream.

3. The method of claim 1, wherein the first known data sequence, the third known data sequence, the fourth known data sequence, the fifth known data sequence and the sixth known data sequence are spaced 16 segments apart.

4. The method of claim 1, wherein the FIC data and the TPC data are positioned between the first known data sequence and the second known data sequence.

5. A broadcast receiver comprising:

a tuner for receiving a broadcast signal comprising a group, the group including mobile service data, fast information channel (FIC) data, transmission parameter channel (TPC) data and known data sequences, wherein the FIC data includes information for rapid mobile service acquisition, wherein the TPC data includes FIC version information for indicating an update of the FIC data, wherein the mobile service data is included in a Reed-Solomon (RS) frame belonging to an ensemble, and wherein the ensemble comprises a signaling information table including access information of the mobile service data and identification information for identifying a stream where keys to decrypt the mobile service data are obtained;

a demodulator for demodulating the received broadcast signal;

an equalizer for compensating channel distortion generated in the demodulated broadcast signal based upon at least one of the known data sequences;

a signaling decoder for decoding the FIC data and the TPC data from the channel distortion compensated broadcast signal;

a first handler for extracting the signaling information table from the channel distortion compensated broadcast signal; and

a second handler for identifying the stream where the keys to decrypt the mobile service data are obtained using the extracted signaling information table and for decrypting the mobile service data using the keys,

wherein the group further includes data blocks,

wherein a first known data sequence of the known data sequences is inserted into a third data block of the data blocks,

wherein a second known data sequence and a third known data sequence of the known data sequences are inserted into a fourth data block of the data blocks,

wherein a fourth known data sequence of the known data sequences is inserted into a fifth data block of the data blocks,

wherein a fifth known data sequence of the known data sequences is inserted into a sixth data block of the data blocks, and

wherein a sixth known data sequence of the known data sequences is inserted into a seventh data block of the data blocks.

6. The broadcast receiver of claim 5, wherein the second handler is further for obtaining the keys from the identified stream.

7. The broadcast receiver of claim 5, wherein the first known data sequence, the third known data sequence, the fourth known data sequence, the fifth known data sequence and the sixth known data sequence are spaced 16 segments apart.

8. The broadcast receiver of claim 5, wherein the FIC data and the TPC data are positioned between the first known data sequence and the second known data sequence.