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

• US 20090052579A1
• Filed: 08/25/2008
• Published: 02/26/2009
• Est. Priority Date: 08/24/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Choi, In Hwan, Lee, Chul Soo, Song, Jae Hyung, Kim, Jeong Woo, Lee, Sang Hyup
• Granted Patent: US 7,912,006 B2
• Time in Patent Office: Days
• US Class Current: 375/301
• CPC Class Codes: H04H 20/26 Arrangements for switching distribution systems
• CPC Class Codes: H04H 40/27 specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/2362 Generation or processing of Service Information [SI]
• 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 21/4345 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

Abstract

A digital broadcast receiving system and a method for controlling the same are disclosed. The method a method for controlling a digital broadcast receiving system includes the steps of receiving a broadcast signal having mobile service data and main service data multiplexed therein, extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group within the received mobile service data, acquiring a program table, by using the IP signaling channel within an ensemble included in the received broadcast signal, and controlling the system to create a list of channels mapped with all ensembles transmitted through at least one physical frequency, by using the acquired program table.

Claims

1. A method for controlling a digital broadcast receiving system, comprising:

receiving a broadcast signal having mobile service data and main service data multiplexed therein;

extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group within the received mobile service data;

acquiring a program table describing minimum information required for an application of a channel scanning process, by using the IP signaling channel within an ensemble included in the received broadcast signal; and

controlling the system to create a list of channels mapped with all ensembles transmitted through at least one physical frequency, by using the acquired program table.

2. The method of claim 1, wherein the ensemble corresponds to a primary ensemble.

3. The method of claim 1, wherein the program table comprises:

number information of a channel mapped with all ensembles transmitted through at least one physical frequency, and additional information on the corresponding channel.

4. The method of claim 3, wherein the channel number information includes a major channel number and a minor channel number both mapped with each ensemble, and

wherein the additional channel information includes a name of a virtual channel, and additional description on the corresponding virtual channel.

5. The method of claim 1, wherein the acquiring a program table and the controlling the system to create a list of channels are performed when a power of the digital broadcast receiving system is turned on, and

wherein the controlling the system to create a list of channels comprises:

collecting channel lists each mapped with all ensembles transmitted through multiple physical frequencies subject to channel scanning, by using the acquired program table;

creating a final channel list on all physical frequencies subject to channel scanning by using at least one of the collected channel lists; and

displaying the created final channel list.

6. The method of claim 1, wherein the IP signaling channel includes a well-known IP address and a well-known UDP port number corresponding to the ensemble, and

wherein the acquiring a program table comprises:

opening an IP socket of an IP signaling channel, by using the well-known IP address and the well-known UDP port number of the IP signaling channel;

when the IP socket is open, collecting an IP datagram being transmitted through the IP signaling channel;

detecting header information of a table being transmitted through the IP signaling channel, by using the collected IP datagram; and

acquiring the program table describing minimum information required for an application of the channel scanning process.

7. The method of claim 1, wherein the data group comprises a plurality of known data sequences, and

wherein the transmission parameter channel (TPC) signaling information and the fast information channel (FIC) signaling information are positioned between a first known data sequence and a second known data sequence.

10. A computer-readable recording medium having a program for executing the method of claim 1 recorded therein.

8. A method for controlling a digital broadcast transmitting system, comprising:

generating a broadcast signal including a program table, the program table describing minimum information required for an application of a channel scanning process; and

transmitting the generated broadcast signal to a digital broadcast receiving system through an IP signaling channel, and

wherein the program table includes a major channel number, a minor channel number, and a virtual channel name collectively mapped with each ensemble, and additional description on the virtual channel.

9. The method of claim 8, wherein, in the transmitting the generated broadcast signal, the program table may either be mapped with all ensembles within a single physical frequency, thereby being transmitted, or be mapped with a single predetermined ensemble within a single physical frequency and then transmitted.

11. A digital broadcast receiving system, comprising:

a receiver receiving a broadcast signal having mobile service data and main service data multiplexed therein;

an extractor extracting transmission parameter channel (TPC) signaling information and fast information channel (FIC) signaling information from a data group within the received mobile service data;

an acquisition unit acquiring a program table, by using the IP signaling channel within an ensemble included in the received broadcast signal, wherein the program table describes minimum information required for an application of a channel scanning process; and

a controller controlling the system to create a list of channels mapped with all ensembles transmitted through at least one physical frequency, by using the acquired program table.

12. The digital broadcast receiving system of claim 11, wherein the channel number information includes a major channel number and a minor channel number both mapped with each ensemble, and

wherein the additional channel information includes a name of a virtual channel, and additional description on the corresponding virtual channel.