Source: http://www.google.co.uk/patents/US8059627
Timestamp: 2015-11-29 23:11:28
Document Index: 111717108

Matched Legal Cases: ['art.\n3', 'art.\n6', 'art.\n9', 'art.\n13', 'Application No. 10', 'Application No. 60', 'Application No. 60', 'Application No. 60']

Patent US8059627 - Digital broadcasting system and method of processing data - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsA digital broadcast system and a method of processing data are disclosed. The receiving system of the digital broadcast system includes a signal receiving unit, a first data processor, a second data processor, and an A/V decoder. The signal receiving unit receives at least one of first mobile service...http://www.google.co.uk/patents/US8059627?utm_source=gb-gplus-sharePatent US8059627 - Digital broadcasting system and method of processing dataAdvanced Patent SearchPublication numberUS8059627 B2Publication typeGrantApplication numberUS 12/168,856Publication date15 Nov 2011Filing date7 Jul 2008Priority date6 Jul 2007Fee statusPaidAlso published asUS8656262, US20090046816, US20120084621, WO2009008647A2, WO2009008647A3Publication number12168856, 168856, US 8059627 B2, US 8059627B2, US-B2-8059627, US8059627 B2, US8059627B2InventorsSung Ryong Hong, In Hwan Choi, Kook Yeon Kwak, Byoung Gill Kim, Won Gyu Song, Jin Woo Kim, Hyoung Gon LeeOriginal AssigneeLg Electronics Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (60), Non-Patent Citations (1), Referenced by (12), Classifications (17), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetDigital broadcasting system and method of processing data
US 8059627 B2Abstract
A digital broadcast system and a method of processing data are disclosed. The receiving system of the digital broadcast system includes a signal receiving unit, a first data processor, a second data processor, and an A/V decoder. The signal receiving unit receives at least one of first mobile service data that is transmitted according to a first transmission method and second mobile service data that is transmitted according to a second transmission method. The first data processor performs demodulation on the first mobile service data received by the signal receiving unit using a first demodulation method and corrects errors occurring in the demodulated first mobile service data. The second data processor performs demodulation on the second mobile service data received by the signal receiving unit using a second demodulation method and corrects errors occurring in the demodulated second mobile service data. The A/V decoder performs A/V decoding on mobile service data outputted from at least one of the first and second data processors.
1. An apparatus for receiving a broadcast signal, the apparatus comprising:
a signal receiving unit configured to receive the broadcast signal including a transmission frame having a parade of data groups that includes a collection of data groups having same Forward Error Correction (FEC codes), each of the data groups including mobile data, Transmission Parameter Channel (TPC) data and known data sequences,
wherein the each of the data groups further includes a plurality of regions, the plurality of regions including data blocks,
wherein a first of the plurality of regions includes central 4 data blocks of the data blocks,
wherein a second of the plurality of regions includes 2 data blocks which are concentric about the first of the plurality of regions,
wherein a third of the plurality of regions includes 2 data blocks which are concentric about the first and second of the plurality of regions,
wherein a fourth of the plurality of region includes 2 data blocks which are concentric about the first, second and third of the plurality of regions,
wherein a first known data sequence of the known data sequences is inserted into a third data block of the data blocks,
wherein second and third known data sequences 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
wherein a sixth known data sequence of the known data sequences is inserted into a seventh data block of the data blocks,
wherein the TPC data includes an identification field to indicate the parade to which the corresponding data group belongs;
an RS (Reed-Solomon) decoder configured to decode the demodulated broadcast signal.
2. The apparatus 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.
3. The apparatus of claim 1, wherein each of the data groups further includes initialization data that is inserted in front of each of the known data sequences.
4. A method of receiving a broadcast signal, the method comprising:
receiving the broadcast signal including a transmission frame having a parade of data groups that includes a collection of data groups having same FEC codes, wherein each of the data groups includes mobile data, Transmission Parameter Channel (TPC) data and known data sequences,
wherein a fourth of the plurality of regions includes 2 data blocks which are concentric about the first, second and third of the plurality of regions,
demodulating the broadcast signal; and
RS (Reed-Solomon) decoding the demodulated broadcast signal.
5. The method of claim 4, 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.
6. The method according to claim 4, wherein each of data groups further includes initialization data that is inserted in front of each of the known data sequences.
an encoder configured to encode mobile data for FEC (Forward Error Correction);
a group formatter configured to form data groups, each of the data groups including the encoded mobile data, Transmission Parameter Channel (TPC) data and known data sequences,
wherein each of the data groups further includes a plurality of regions, the plurality of regions including data blocks,
wherein a fifth known data sequence of the known data sequences is inserted into a sixth data block of the data blocks,
wherein a sixth known data sequence of the known data sequences is inserted into a seventh data block of the data blocks;
a packet formatter configured to form data packets that include data in the data groups;
a multiplexer configured to multiplex the data packets and main data packets including main data; and
a transmission unit configured to transmit the broadcast signal including a parade of the data groups that includes a collection of data groups having same FEC codes,
wherein the TPC data includes an identification field to indicate the parade to which the corresponding data group belongs.
8. The apparatus of claim 7, 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.
9. The apparatus of claim 7, wherein each of data groups further includes initialization data that is inserted in front of each of the known data sequences.
10. The apparatus of claim 9, wherein the apparatus further includes:
a trellis encoder configured to perform trellis encoding on data in the multiplexed data packets, wherein the initialization data is used for initializing a memory in the trellis encoder before the trellis encoding.
11. A method of transmitting a broadcast signal, the method comprising:
encoding mobile data for FEC (Forward Error Correction);
forming data groups, each of the data groups including the encoded mobile data, Transmission Parameter Channel (TPC) data and known data sequences,
forming data packets that include data in the data groups;
multiplexing the data packets and main data packets including main data; and
transmitting the broadcast signal including a parade of the data groups that includes a collection of data groups having same FEC codes,
12. The method of claim 11, 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.
13. The method of claim 11, wherein each of data groups further includes initialization data that is inserted in front of each of the known data sequences.
performing trellis encoding on data in the multiplexed data packets,
wherein the initialization data is used for initializing a memory in a trellis encoder before the trellis encoding.
This application claims the benefit of the Korean Patent Application No. 10-2008-0065170, filed on Jul. 4, 2008, which is hereby incorporated by reference as if fully set forth herein. Also, this application claims the benefit of U.S. Provisional Application No. 60/948,439, filed on Jul. 6, 2007, which is hereby incorporated by reference. This application also claims the benefit of U.S. Provisional Application No. 60/957,714, filed on Aug. 24, 2007, which is hereby incorporated by reference. This application also claims the benefit of U.S. Provisional Application No. 60/974,084, filed on Sep. 21, 2007, which is hereby incorporated by reference.
The present invention relates to a digital broadcasting system, and more particularly, to a digital broadcasting system and a method of processing data.
Another object of the present invention is to provide an integrated receiving and a data processing method that be able to reception and processing of a plurality of mobile broadcast signals transmitted in different transmission formats.
Another object of the present invention is to provide an integrated receiving and a data processing method that can support an MPH mobile broadcast service and a mediaFLO mobile broadcast service.
In another aspect of the present invention, a receiving system includes a signal receiving unit, a first data processor, a second data processor, and an A/V decoder. The signal receiving unit receives at least one of first mobile service data that is transmitted according to a first transmission method and second mobile service data that is transmitted according to a second transmission method. The first mobile service data configures a data group, the data group is divided into a plurality of regions, known data sequences are lineally inserted in some regions among the plurality of regions within the data group, and initialization data are inserted at a beginning portion of each known data sequence, the initialization data being used for initializing a memory included in a trellis encoder of a transmitting system. The first data processor performs demodulation on the first mobile service data received by the signal receiving unit using a first demodulation method and corrects errors occurring in the demodulated first mobile service data. The second data processor performs demodulation on the second mobile service data received by the signal receiving unit using a second demodulation method and corrects errors occurring in the demodulated second mobile service data. The A/V decoder performs A/V decoding on mobile service data outputted from at least one of the first and second data processors.
The signal receiving unit further includes a tuner for receiving the first mobile service data that is transmitted according to the first transmission method and the second mobile service data that is transmitted according to the second transmission method.
The signal receiving unit further includes an A/D converter for converting each of the first mobile service data and the second mobile service data into a digital signal and outputting the digital signal.
The receiving system further includes a signal determinator for determining a transmission method of mobile service data received by the signal receiving unit, and a demultiplexer for outputting the first mobile service data received by the signal receiving unit to the first data processor and outputting the second mobile service data received by the signal receiving unit to the second data processor according to the determination of the signal determinator.
The signal determinator determines whether mobile service data received by the signal receiving unit has been received according to the first transmission method or the second transmission method using channel allocation information.
The signal determinator determines whether mobile service data received by the signal receiving unit has been received according to the first transmission method or the second transmission method according to whether or not the known data has been detected.
The first data processor includes a first demodulator for demodulating input first mobile service data according to reverse of a VSB modulation method, a first channel equalizer for performing channel equalization on the demodulated first mobile service data, thereby compensating for channel distortion that has occurred in the demodulated first mobile service data, a first inner decoder for performing first error-correction decoding process on the channel-equalized first mobile service data, and a first outer decoder for performing second error-correction decoding process on the first error-correction decoded first mobile service data and then outputting the second error-correction decoded first mobile service data for A/V decoding.
The second data processor includes a second demodulator for demodulating input second mobile service data according to reverse of an OFDM modulation method, a second channel equalizer for performing channel equalization on the demodulated second mobile service data, thereby compensating for channel distortion that has occurred in the demodulated second mobile service data, a second inner decoder for performing first error-correction decoding process on the channel-equalized second mobile service data and then outputting the inner-decoded second mobile service data for A/V decoding.
In another aspect of the present invention, a data processing method of a receiving system, receiving at least one of first mobile service data that is transmitted according to a first transmission method and second mobile service data that is transmitted according to a second transmission method, determining a transmission method of the received mobile service data, performing demodulation on the first mobile service data inputted using a first demodulation method and correcting errors occurring in the demodulated first mobile service data according to the determination result, performing demodulation on the second mobile service data inputted using a second demodulation method and correcting errors occurring in the demodulated second mobile service data according to the determination result, and performing A/V decoding on mobile service data outputted from at least one of the first and second data processor steps.
FIG. 73 is a block diagram illustrating an embodiment of a demodulating unit of an integrated receiving system according to the present invention;
FIG. 74 is a block diagram illustrating another embodiment of a demodulating unit of an integrated receiving system according to the present invention and
FIG. 75 is a flow chart illustrating an embodiment of a procedure for receiving and processing MPH mobile service data and FLO mobile service data according to the present invention.
0=2 else if i<8, 0=1 else if i<12, 0=3 else. Herein, j indicates the slot number within a sub-frame. The value of j may range from 0 to 15 (i.e., 0≦j≦15). Also, variable i indicates the data group number. The value of i may range from 0 to 15 (i.e., 0≦i≦15).
In the description of the present invention, the RS frame being assigned to regions A/B within the corresponding data group will be referred to as a “primary RS frame”, and the RS frame being assigned to regions C/D within the corresponding data group will be referred to as a “secondary RS frame”, for simplicity. Also, the primary RS frame and the secondary RS frame form (or configure) one parade. More specifically, when the mobile service data within one RS frame are assigned either to all of regions A/B/C/D within the correspond