Digital broadcasting system and method of processing data in digital broadcasting system

• US 8,171,308 B2
• Filed: 09/22/2008
• Issued: 05/01/2012
• Est. Priority Date: 09/21/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, In Hwan, Lee, Chul Soo, Park, Sang Kil
• Primary Examiner(s): Lipman, Jacob
• Application Number:
  US12/235,584
• Publication Number:
  US 20090080574A1
• Time in Patent Office: 1,317 Days
• Field of Search: 370/329, 370/535, 455/3.02
• US Class Current: 713/189
• CPC Class Codes: H04H 60/16 on playing information
• CPC Class Codes: H04H 60/23 using cryptography, e.g. encryption, authentication, key distribution
• 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 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• 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 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006

Abstract

A digital broadcast receiver and a control method thereof are disclosed. The control method includes receiving a broadcast signal into which mobile service data and main service data are multiplexed, extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group in the received mobile service data, acquiring control data required to decrypt an encrypted service included in an ensemble by using the extracted FIC signaling information, the ensemble being a virtual channel group of the received mobile service data, and controlling such that the encrypted service is decrypted by using the acquired control data.

Claims

1. A method of transmitting a broadcast signal in a transmitter, the method comprising:

multiplexing mobile data and main data; and

transmitting a transmission frame including the multiplexed mobile data and main data, wherein a parade of data groups is transmitted during slots within the transmission frame, the slots being basic time periods for multiplexing of the mobile data and the main data, wherein each of the data groups includes the mobile data, signaling information and regularly spaced known data sequences, wherein the signaling information includes fast information channel (FIC) data having binding information between a service of the mobile data and an ensemble and transmission parameter channel (TPC) data indicating a version of the FIC data, wherein the FIC data is divided into a plurality of FIC segments, and each of the FIC segments includes an FIC segment header and is transmitted in each of the data groups, wherein the FIC segment header includes an error indicator indicating whether or not an error is detected in a corresponding FIC segment, wherein the ensemble includes the service and a signaling table describing the service, and wherein the ensemble is RS-CRC (Reed Solomon-cyclic redundancy check) encoded through a 2-dimensional Reed-Solomon (RS) frame, and each row of a payload of the RS frame includes a transport packet of the mobile data.

2. The method of claim 1, wherein, when a value of the error indicator is equal to 0 (zero), the error indicator indicates that no error is detected in the corresponding FIC segment, and, when the value of the error indicator is equal to 1, the error indicator indicates that an error is detected in the corresponding FIC segment.

3. The method of claim 1, wherein the signaling table includes a service map table (SMT) which provides Internet Protocol (IP) address information and IP component level information for the service.

9. The apparatus of claim 1, wherein the signaling table includes a service map table (SMT) which provides internet protocol (IP) address information and IP component level information for the service.

4. A method of receiving a broadcast signal in a receiver, the method comprising:

receiving a broadcast signal including a transmission frame, wherein a parade of data groups in the broadcast signal is received during slots within the transmission frame, the slots being basic time periods for multiplexing of mobile data and main data, and wherein each of the data groups includes the mobile data, signaling information and regularly spaced known data sequences,

demodulating the received broadcast signal and obtaining, from the signaling information, fast information channel (FIC) data including binding information between a service of the mobile data and an ensemble and transmission parameter channel (TPC) data indicating a version of the FIC data, wherein the FIC data is divided into a plurality of FIC segments, and each of the FIC segments includes an FIC segment header and is received in each of the data groups, wherein the FIC segment header includes an error indicator indicating whether or not an error is detected in a corresponding FIC segment, and wherein the ensemble includes the service and a signaling table describing the service;

building a Reed-Solomon (RS) frame corresponding to the ensemble by collecting a plurality of data portions which are mapped to the data groups; and

decoding the RS frame, wherein the RS frame is a 2-dimensional data frame through which the ensemble is RS-CRC (Reed Solomon-cyclic redundancy check) encoded, and each row of a payload of the RS frame includes a transport packet of the mobile data.

5. The method of claim 4, wherein, when a value of the error indicator is equal to 0 (zero), the error indicator indicates that no error is detected in the corresponding FIC segment, and, when the value of the error indicator is equal to 1, the error indicator indicates that an error is detected in the corresponding FIC segment.

6. The method of claim 4, wherein the signaling table includes a service map table (SMT) which provides internet protocol (IP) address information and IP component level information for the service.

7. An apparatus for transmitting a broadcast signal, the apparatus comprising:

a multiplexer configured to multiplex mobile data and main data; and

a transmission unit configured to transmit a transmission frame including the multiplexed mobile and main data, wherein a parade of data groups is transmitted during slots within the transmission frame, the slots being basic time periods for multiplexing of the mobile data and the main data, wherein each of the data groups includes the mobile data, signaling information and regularly spaced known data sequences, wherein the signaling information includes fast information channel (FIC) data having binding information between a service of the mobile data and an ensemble and transmission parameter channel (TPC) data indicating a version of the FIC data, wherein the FIC data is divided into a plurality of FIC segments, and each of the FIC segments includes an FIC segment header and is transmitted in each of the data groups, wherein the FIC segment header includes an error indicator indicating whether or not an error is detected in a corresponding FIC segment, wherein the ensemble includes the service and a signaling table describing the service, and wherein the ensemble is RS-CRC (Reed Solomon-cyclic redundancy check) encoded through a 2-dimensional Reed-Solomon (RS) frame, and each row of a payload of the RS frame includes a transport packet of the mobile data.

8. The apparatus of claim 7, wherein when a value of the error indicator is equal to 0 (zero), the error indicator indicates that no error is detected in the corresponding FIC segment, and, when the value of the error indicator is equal to 1, the error indicator indicates that an error is detected in the corresponding FIC segment.

10. An apparatus for receiving a broadcast signal, the apparatus comprising:

a receiver configured to receive a broadcast signal including a transmission frame, wherein a parade of data groups is received during slots within the transmission frame, the slots being time periods for multiplexing of mobile data and main data, and wherein each of the data groups includes the mobile data, signaling information and regularly spaced known data sequences,

a demodulator configured to demodulate the received broadcast signal and obtaining, from the signaling information, fast information channel (FIC) data including binding information between a service of the mobile data and an ensemble, and transmission parameter channel (TPC) data having a version of the FIC data, wherein the FIC data is divided into a plurality of FIC segments, and each of the FIC segments including an FIC segment header is received in each of the data groups, and wherein the FIC segment header includes an error indicator indicating whether or not an error is detected in a corresponding FIC segment, and wherein the ensemble includes the service and a signaling table describing the service; and

an RS frame decoder configured to build a Reed-Solomon (RS) frame corresponding to the ensemble by collecting a plurality of data portions to which the data groups are mapped and decode the built RS frame, wherein the RS frame is a 2-dimensional data frame through which the ensemble is RS-CRC (cyclic redundancy check) encoded, and a row of a payload of the RS frame includes a transport packet of the mobile data.

11. The apparatus of claim 10, wherein, when a value of the error indicator is equal to 0 (zero), the error indicator indicates that no error is detected in the corresponding FIC segment, and, when the value of the error indicator is equal to 1, the error indicator indicates that an error is detected in the corresponding FIC segment.

12. The apparatus of claim 10, wherein the signaling table includes a service map table (SMT) which provides internet protocol (IP) address information and IP component level information for the service.