DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA

• US 20090037792A1
• Filed: 07/07/2008
• Published: 02/05/2009
• Est. Priority Date: 07/04/2007
• 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 7,831,885 B2
• Time in Patent Office: Days
• US Class Current: 714/755
• CPC Class Codes: G06F 11/10 Adding special bits or symbols to the coded information, e.g. parity check, casting out 9's or 11's
• CPC Class Codes: H03M 13/251 with block coding
• CPC Class Codes: H03M 13/271 Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H03M 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H04H 20/30 by a single channel
• CPC Class Codes: H04H 20/57 for mobile receivers
• CPC Class Codes: H04H 40/27 specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0042 Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape H04L1/0067 takes precedence
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 2025/03382 Single of vestigal sideband
• CPC Class Codes: H04L 25/0202 Channel estimation
• CPC Class Codes: H04L 27/066 Carrier recovery circuits H04L27/2271 takes precedence
• CPC Class Codes: H04L 63/08 : for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04N 21/23608 : Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
• CPC Class Codes: H04N 21/2365 : Multiplexing of several video streams
• 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 21/2385 : Channel allocation H04N21/266 takes precedence; Bandwidth allocation H04N21/24 takes precedence ; allocation of channels according to the instantaneous demands of the users in time-division multiplex systems H04J3/1682; admission control, resource allocation in open networks H04L12/5692; arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896; negotiating bandwidth in wireless networks H04W28/16
• 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 21/4347 : Demultiplexing of several video streams
• CPC Class Codes: H04N 21/4381 : Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• 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 21/44008 : involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream arrangements characterised by components specially adapted for monitoring, identification or recognition of video in broadcast systems H04H60/59
• CPC Class Codes: H04N 21/6433 : Digital Storage Media - Command and Control Protocol [DSM-CC]

Abstract

A digital receiving system, and a method of processing data are disclosed. The digital receiving system includes a receiving unit, a known sequence detector, and a channel equalizer. The receiving unit receives a broadcast signal including mobile service data and main service data. The known sequence detector detects known data linearly inserted in a data group. The channel equalizer performs channel-equalizing on the received mobile service data using the detected known data.

Claims

1. A broadcast receiving system, comprising:

a receiving unit receiving a broadcast signal including mobile service data and main service data, wherein the mobile service data configures a data group, wherein the data group is divided into a plurality of regions, wherein known data sequences are linearly inserted in some regions among the plurality of regions within the data group, and wherein 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 broadcast transmitting system;

a known sequence detector detecting known data linearly inserted in the data group; and

a channel equalizer using the detected known data, thereby channel-equalizing on the received mobile service data.

2. The broadcast receiving system of claim 1, wherein N number of known data sequences are inserted in some regions among the plurality of regions within the data group, and wherein a transmission parameter is inserted between a first known data sequence and a second known data sequence, among the N number of known data sequences.

3. The broadcast receiving system of claim 2, further comprising:

a transmission parameter detector detecting the transmission parameter; and

a block decoder symbol-decoding the mobile service data in block units, based upon the detected transmission parameter.

4. The broadcast receiving system of claim 3, further comprising:

a power controller controlling power based upon the detected transmission parameter, thereby receiving a data group including requested mobile service data.

5. The broadcast receiving system of claim 1, wherein the data group configures a RS frame, and wherein the RS frame includes at least one data packet corresponding to the mobile service data, an RS parity generated based upon the at least one data packet, and a CRC checksum generated based upon the at least one data packet and the RS parity.

6. The broadcast receiving system of claim 1, further comprising:

a RS frame decoder performing CRC-decoding and RS-decoding on the mobile service data in RS frame units, thereby correcting errors occurred in the mobile service data within the corresponding RS frame.

7. The broadcast receiving system of claim 1, further comprising:

a derandomaizer derandomizing the RS-decoded mobile service data.

8. A method for processing data of a receiving system, comprising:

receiving a broadcast signal including mobile service data and main service data, wherein the mobile service data configures a data group, wherein the data group is divided into a plurality of regions, wherein known data sequences are linearly inserted in some regions among the plurality of regions within the data group, and wherein 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 broadcast transmitting system;

detecting known data linearly inserted in the data group; and

channel-equalizing on the received mobile service data by using the detected known data.

9. The method of claim 8, wherein N number of known data sequences are inserted in some regions among the plurality of regions within the data group, and wherein a transmission parameter is inserted between a first known data sequence and a second known data sequence, among the N number of known data sequences.

10. The method of claim 9, further comprising:

detecting the transmission parameter; and

symbol-decoding the mobile service data in block units, based upon the detected transmission parameter.

11. The method of claim 10, further comprising:

controlling power based upon the detected transmission parameter, thereby receiving a data group including requested mobile service data.

12. The method of claim 8, wherein the data group configures a RS frame, and wherein the RS frame includes at least one data packet corresponding to the mobile service data, an RS parity generated based upon the at least one data packet, and a CRC checksum generated based upon the at least one data packet and the RS parity.

13. The method of claim 12, further comprising:

performing CRC-decoding and RS-decoding on the mobile service data in RS frame units, thereby correcting errors occurred in the mobile service data within the corresponding RS frame.

14. The method of claim 13, further comprising:

derandomizing the RS-decoded mobile service data.