DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA IN DIGITAL BROADCASTING SYSTEM

• US 20090080507A1
• Filed: 09/22/2008
• Published: 03/26/2009
• Est. Priority Date: 09/20/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Suh, Jong Yeul, Choi, In Hwan, Lee, Chul Soo, Kim, Jin Pil, Song, Jae Hyung
• Granted Patent: US 8,160,009 B2
• Time in Patent Office: Days
• US Class Current: 375/232
• CPC Class Codes: H04H 20/57 for mobile receivers
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/2383 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 21/4126 The peripheral being portable, e.g. PDAs or mobile phones
• 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 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport 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
• CPC Class Codes: H04N 7/173 with two-way working, e.g. subscriber sending a programme selection signal

Abstract

A digital broadcasting system and a data processing method are disclosed. A receiver receives a broadcast signal including mobile service data and main service data. A known data detector detects known data from the broadcast signal. An equalizer performs channel equalization on the mobile service data received by means of the detected known data. A RS frame decoder acquires a RS frame from the channel-equalized mobile service data. A management processor checks a TP header contained in the RS frame, and identifies which data is contained in the RS frame. MH presentation processor displays the data contained in the RS frame.

Claims

1. A data processing method comprising:

receiving a broadcast signal including mobile service data and main service data;

detecting known data from the broadcast signal;

performing channel equalization on the mobile service data by means of the detected known data;

acquiring a Reed Solomon (RS) frame from the channel-equalized mobile service data;

identifying which data is contained in the RS frame on the basis of a transmission parameter channel (TPC) transmitting parameters of the mobile service data; and

displaying the data contained in the RS frame.

2. The method according to claim 1, wherein:

the mobile service data may configure a data group, in which

the data group is segmented into several areas, a known data sequence is linearly inserted into some areas from among the several areas, and initialization data for initializing a memory contained in a Trellis encoder of a transmitter is located at a start part of the known data sequence; and

N number of the known data sequences are inserted into the some areas from among the several areas, and a transmission parameter is inserted between a first known data sequence and a second known data sequence from among the N known data sequences.

3. The method according to claim 1, wherein the data contained in the RS frame is either of an MPEG-2 TS packet and an IP datagram.

4. A data processing method comprising:

receiving a broadcast signal including mobile service data and main service data;

detecting known data from the broadcast signal;

performing channel equalization on the mobile service data received by means of the detected known data;

acquiring a Reed Solomon (RS) frame from the channel-equalized mobile service data;

checking a Transport Packet (TP) header constructing the RS frame, and identifying which data is contained in the RS frame; and

displaying the data contained in the RS frame.

5. The method according to claim 4, wherein:

the mobile service data may configure a data group, in which

the data group is segmented into several areas, a known data sequence is linearly inserted into some areas from among the several areas, and initialization data for initializing a memory contained in a Trellis encoder of a transmitter is located at a start part of the known data sequence; and

N number of the known data sequences are inserted into the some areas from among the several areas, and a transmission parameter is inserted between a first known data sequence and a second known data sequence from among the N known data sequences.

6. The method according to claim 4, wherein the data contained in the RS frame includes at least one of an MPEG-2 TS packet, an IP datagram, and a signaling packet.

7. The method according to claim 4, wherein the TP header includes at least one of type indication information indicating a type of data contained in a Transport Packet (TP) payload, error indication information indicating the presence or absence of errors in a Transport Packet (TP), stuffing indication information indicating the presence or absence of a stuffing byte in the TP, and point information indicating a start point of new-type data in the TP.

8. The method according to claim 4, wherein the identifying step includes:

identifying whether the data contained in the RS frame is a Generic Stream Encapsulation (GSE) packet.

9. A digital broadcasting system comprising:

a receiver for receiving a broadcast signal including mobile service data and main service data;

a known data detector for detecting known data from the broadcast signal;

an equalizer for performing channel equalization on the mobile service data received by means of the detected known data;

a Reed Solomon (RS) frame decoder for acquiring a Reed Solomon (RS) frame from the channel-equalized mobile service data;

a Reed Solomon (RS) frame decoder for identifying which data is contained in the RS frame on the basis of a transmission parameter channel (TPC) transmitting parameters of the mobile service data; and

a Mobile Handheld (MH) presentation processor for displaying the data contained in the RS frame.

10. The digital broadcasting system according to claim 9, wherein:

the mobile service data may configure a data group, in which

the data group is segmented into several areas, a known data sequence is linearly inserted into some areas from among the several areas, and initialization data for initializing a memory contained in a Trellis encoder of a transmitter is located at a start part of the known data sequence; and

N number of the known data sequences are inserted into the some areas from among the several areas, and a transmission parameter is inserted between a first known data sequence and a second known data sequence from among the N known data sequences.

11. The digital broadcasting system according to claim 9, wherein the data contained in the RS frame is either of an MPEG-2 TS packet and an IP datagram.

12. A digital broadcasting system comprising:

a receiver for receiving a broadcast signal including mobile service data and main service data;

a known data detector for detecting known data from the broadcast signal;

an equalizer for performing channel equalization on the mobile service data received by means of the detected known data;

a Reed Solomon (RS) frame decoder for acquiring a Reed Solomon (RS) frame from the channel-equalized mobile service data;

a management processor for checking a Transport Packet (TP) header constructing the RS frame, and identifying which data is contained in the RS frame; and

a Mobile Handheld (MH) presentation processor for displaying the data contained in the RS frame.

13. The digital broadcasting system according to claim 12, wherein:

the mobile service data may configure a data group, in which

the data group is segmented into several areas, a known data sequence is linearly inserted into some areas from among the several areas, and initialization data for initializing a memory contained in a Trellis encoder of a transmitter is located at a start part of the known data sequence; and

N number of the known data sequences are inserted into the some areas from among the several areas, and a transmission parameter is inserted between a first known data sequence and a second known data sequence from among the N known data sequences.

14. The digital broadcasting system according to claim 12, wherein the data contained in the RS frame includes at least one of an MPEG-2 TS packet, an IP datagram, and a signaling packet.

15. The digital broadcasting system according to claim 12, wherein the management processor checks a Transport Packet (TP) header constructing the RS frame, and identifies whether the data contained in the RS frame is a Generic Stream Encapsulation (GSE) packet.