DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD

• US 20090083606A1
• Filed: 09/22/2008
• Published: 03/26/2009
• Est. Priority Date: 09/21/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Byoung Gill, Lee, Hyoung Gon, Choi, In Hwan, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Granted Patent: US 7,698,621 B2
• Time in Patent Office: Days
• US Class Current: 714/776
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• 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 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 12/18 for broadcast or conference , e.g. multicast
• CPC Class Codes: H04L 27/00 Modulated-carrier systems
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals

Abstract

A receiving system and data processing method therein are disclosed, by which mobile service data is received and processed. The present invention includes a demodulator receiving a broadcast signal including mobile service data and main service data, the demodulator converting the received broadcast signal to a baseband signal, the mobile service data configuring a data group, the data group including a plurality of know data sequences, a known data detector detecting a location of at least one of the known data sequence within the data group, the known data detector outputting detected known data location information, an equalizer channel-equalizing the demodulated mobile service data using the detected known data location information, and a signaling decoder reconstructing transmission parameter channel (TPC) data and fast information channel (FIC) data received by being included in a signaling information area allocated between a first known data sequence and a second known data sequence among a plurality of the known data sequences.

Claims

1. A receiving system comprising:

a demodulator receiving a broadcast signal including mobile service data and main service data, the demodulator converting the received broadcast signal to a baseband signal, the mobile service data configuring a data group, the data group including a plurality of know data sequences;

a known data detector detecting a location of at least one of the known data sequence within the data group, the known data detector outputting detected known data location information;

an equalizer channel-equalizing the demodulated mobile service data using the detected known data location information;

a signaling decoder reconstructing transmission parameter channel (TPC) data and fast information channel (FIC) data received by being included in a signaling information area allocated between a first known data sequence and a second known data sequence among a plurality of the known data sequences; and

a controller receiving the detected known data location information and the TPC data, the controller generating to output at least one selected from the group consisting of a presence or non-presence of the data group of a selected parade, location information of a different known data sequence within the data group, SCCC relevant information and RS frame relevant information.

2. The receiving system of claim 1, further comprising a block decoder performing turbo coding by a block unit on the mobile service data channel equalized and outputted by the equalizer according to the SCCC relevant information outputted from the controller.

3. The receiving system of claim 2, further comprising an error corrector correcting error generated from the mobile service data outputted from the block decoder according to the RS frame relevant information outputted from the controller.

4. The receiving system of claim 1, the controller comprising:

a parade ID checker outputting transmission parameters included in the TPC data to a corresponding block if a parade identifier included in the TPC data outputted from the signaling decoder is identical to a parade identifier inputted by a user;

a parade mapper receiving a first slot number (SGN) for a parade including the data group and a number (NoG) of data groups allocated to the parade including the data group from the parade ID checker, the parade mapper outputting slot information on a slot carrying the data group among slots within a sub-frame;

a frame synchronizer receiving a number of a current sub-frame included in the TPC data (sub_frame_number), a number of a current slot within a corresponding sub-frame (slot_number) and repetitive cycle (PRC) information of the parade, the frame synchronizer outputting a slot number (slot_counter) of a current viewpoint at which the receiving system is operating and a frame mask (frame_mask) signal for identifying whether the corresponding parade is carried on a current MPH frame;

a group controller receiving the slot information from the parade mapper, the group controller receiving the slot number (slot_counter) of the current viewpoint and the frame mask signal from the frame synchronizer, the group controller generating and outputting information indicating whether the data group is carried by the slot number of the current viewpoint; and

a known sequence indication controller outputting the location information of the different known data sequence within the corresponding data group by referring to the known data location information outputted from the known data detector.

5. The receiving system of claim 4, wherein a data group number i transmitted per the sub-frame is determined as continuous integers ranging from SGN to (SGN+NoG−

1) and wherein the parade mapper calculates slot information j for carrying the data group among the slots within the sub-frame by applying the data group number i to a following equation;

j=(4i+O) mod 16,

where

O=0 if i<

4,

O=2 else if i<

8,

O=1 else if i<

12,

O=3 else.

6. The receiving system of claim 4, wherein if the parade identifier included in the TPC data outputted from the signaling decoder is not identical to the parade identifier inputted by the user, the parade ID checker stands by until next TPC data is inputted from the signaling decoder.

7. The receiving system of claim 4, wherein the known sequence indication controller outputs the location information of the known data sequence only if the data group is transmitted using the indication information outputted from the group controller.

8. The receiving system of claim 1, the signaling decoder comprising:

a decoder performing iterative turbo decoding on data of the signaling information area among the equalized data;

a demultiplexer discriminating the TPC data and the FIC data from the turbo-decoded data;

a first error corrector correcting error generated from the demultiplexed TPC data, the first error corrector outputting the error-corrected TPC data to the controller;

a block deinterleaver performing block deinterleaving on the demultiplexed FIC data; and

a second error corrector correcting error generated from the block-deinterleaved FIC data, the second error corrector outputting the error-corrected FIC data to an upper layer.

9. A method of processing data in a receiving system, comprising the steps of:

receiving a broadcast signal including mobile service data and main service data and converting the received broadcast signal to a baseband signal, the mobile service data configuring a data group, the data group including a plurality of know data sequences;

detecting a location of at least one of the known data sequence within the data group and outputting detected known data location information;

channel-equalizing the demodulated mobile service data using the detected known data location information;

reconstructing transmission parameter channel (TPC) data and fast information channel (FIC) data received by being included in a signaling information area allocated between a first known data sequence and a second known data sequence among a plurality of the known data sequences; and

receiving the detected known data location information and the TPC data and generating to output at least one selected from the group consisting of a presence or non-presence of the data group of a selected parade, location information of a different known data sequence within the data group, SCCC relevant information and RS frame relevant information.

10. The method of claim 9, further comprising the step of performing turbo coding by a block unit on the received mobile service data channel equalized according to SCCC relevant information.

11. The method of claim 10, further comprising the step of correcting error generated from the block-decoded mobile service data according to the RS frame relevant information.

12. The method of claim 9, the information outputting step comprising the steps Of:

outputting transmission parameters included in the TPC data if a parade identifier included in the TPC data is identical to a parade identifier inputted by a user;

generating slot information on a slot carrying the data group among slots within a sub-frame using a first slot number (SGN) for a parade including the data group and a number (NoG) of data groups allocated to the parade including the data group among the outputted transmission parameters;

generating a slot number (slot_counter) of a current viewpoint at which the receiving system is operating and a frame mask (frame_mask) signal for identifying whether the corresponding parade is carried on a current MPH frame using a frame synchronizer receiving a number of a current sub-frame included in the TPC data (sub_frame_number), a number of a current slot within a corresponding sub-frame (slot_number) and repetitive cycle (PRC) information of the parade among the outputted transmission parameters; and

generating information indicating whether the data group is carried by the slot number of the current viewpoint using the slot information, the slot number (slot_counter) of the current viewpoint and the frame mask signal.

13. The method of claim 12, further comprising the step of outputting the location information of the known data sequence within the corresponding data group using the known data location information detected in the known data detecting step and the information indicating whether the data group is transmitted only if the data group is transmitted.

14. The method of claim 12, further comprising the step of if the parade identifier included in the TPC data is not identical to the parade identifier inputted by the user, standing by until next TPC data is inputted.

15. The method of claim 9, the signaling decoding step comprising the steps of:

performing iterative turbo decoding on data of the signaling information area among the equalized data;

discriminating the TPC data and the FIC data from the turbo-decoded data;

correcting error generated from the discriminated TPC data;

performing block deinterleaving on the discriminated FIC data; and

correcting error generated from the block-deinterleaved FIC data.