Digital broadcasting receiver and method for controlling the same

• US 8,001,572 B2
• Filed: 09/22/2008
• Issued: 08/16/2011
• Est. Priority Date: 09/21/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, In Hwan, Lee, Chul Soo, Song, Jae Hyung, Park, Sang Kil
• Primary Examiner(s): Kumar; Rankaj
• Assistant Examiner(s): Flynn; Randy
• Application Number:
  US12/235,578
• Publication Number:
  US 20090083783A1
• Time in Patent Office: 1,058 Days
• Field of Search: 725 32- 35, 725/40, 725/62, 455/403, 455 301- 302, 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 reception system includes a baseband processor receiving a broadcasting signal including mobile service data and main service data, the mobile service data including first service data and second service data, a table handler parsing a table from an RS frame and extracting signaling information of the second service data, a frame handler extracting the second service data from the RS frame on the basis of the extracted signaling information, and a conditional access handler releasing the conditional access of the extracted second service data on the basis of conditional access information of the extracted signaling information.

Claims

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

receiving a broadcast signal, the broadcast signal comprising mobile service data, a signaling information table including access information of the mobile service data, fast information channel (FIC) data, and transmission parameter channel (TPC) data, wherein the mobile service data and the signaling information table are encapsulated into at least one Reed-Solomon (RS) frame, wherein the FIC data includes information for rapid mobile service acquisition, and wherein the TPC data includes FIC version information for indicating an update of the FIC data;

demodulating the received broadcast signal;

extracting the signaling information table from the demodulated 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,

wherein a size of the at least one RS frame is L (rows)×

N+2 (column size of the RS frame) bytes, each of the rows having an M-byte header leaving the rest of the row available for data, wherein the data in the rows are packed into the rows end-to-end, with or without wrapping around at the end of each row to the next row, and wherein L, M, and N are integers.

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

3. The method of claim 1, wherein the at least one RS frame is divided into a plurality of groups, each of the plurality of groups including a portion of data included in the RS frame and a plurality of known data sequences.

4. The method of claim 3, wherein the FIC data and the TPC data are positioned between a first known data sequence and a second known data sequence among the plurality of known data sequences.

5. The method of claim 1, wherein the header includes at least one of type information indicating a type of data in the row, information indicating whether or not an error is included in the row and information indicating whether or not stuffing bytes are included in the row.

6. The method of claim 5, further comprising determining a type of the mobile service data included in the row based upon the type information included in the header.

7. A broadcast receiver comprising:

a tuner for receiving a broadcast signal, the broadcast signal comprising mobile service data, a signaling information table including access information of the mobile service data, fast information channel (FIC) data, and transmission parameter channel (TPC) data, wherein the mobile service data and the signaling information table are encapsulated into at least one Reed-Solomon (RS) frame, wherein the FIC data includes information for rapid mobile service acquisition, and wherein the TPC data includes FIC version information for indicating an update of the FIC data;

a demodulator for demodulating the received broadcast signal;

a first handler for extracting the signaling information table from the demodulated broadcast signal; and

a second handler for 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,

wherein a size of the at least one RS frame is L (rows)×

N+2 (column size of the RS frame) bytes, each of the rows having an M-byte header leaving the rest of the row available for data, wherein the data in the rows are packed into the rows end-to-end, with or without wrapping around at the end of each row to the next row, and wherein L, M, and N are integers.

8. The broadcast receiver of claim 7, wherein the second handler obtains the keys from the identified stream.

9. The broadcast receiver of claim 7, wherein the at least one RS frame is divided into a plurality of groups, each of the plurality of groups including a portion of data included in the RS frame and a plurality of known data sequences.

10. The broadcast receiver of claim 9, wherein the FIC data and the TPC data are positioned between a first known data sequence and a second known data sequence among the plurality of known data sequences.

11. The broadcast receiver of claim 7, wherein the header includes at least one of type information indicating a type of data in the row, information indicating whether or not an error is included in the row, and information indicating whether or not stuffing bytes are included in the row.

12. The broadcast receiver of claim 11, wherein the second handler determines a type of the mobile service data included in the row based upon the type information included in the header.