METHOD FOR RECEIVING BROADCASTING SIGNAL AND BROADCASTING RECEIVER

• US 20080216113A1
• Filed: 02/21/2008
• Published: 09/04/2008
• Est. Priority Date: 02/23/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Byoung Gill, Lee, Hyoung Gon, Yun, Chang Sik, Choi, In Hwan, Kim, Jin Pil, Kim, Jong Moon, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Granted Patent: US 7,793,320 B2
• Time in Patent Office: Days
• US Class Current: 725/33
• CPC Class Codes: H04H 20/59 for emergency or urgency
• 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 21/41407 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 21/4383 Accessing a communication channel
• CPC Class Codes: H04N 21/814 comprising emergency warnings arrangements specially adapted for emergency or urgency in broadcast systems H04H20/59; arrangements for providing alarms, notifications, alerts to substation in data switching networks H04L12/1895
• CPC Class Codes: H04N 21/8146 involving graphical data, e.g. 3D object, 2D graphics
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 7/163 by receiver means only
• CPC Class Codes: Y10S 370/912 Packet communications
• CPC Class Codes: Y10S 370/916 Multiplexer/demultiplexer

Abstract

A method for receiving a broadcasting signal and a broadcasting signal receiver are disclosed. Even when a cell is changed while an emergency alert is output, the emergency alert can be continuously output using emergency alert table information included in the broadcasting signal and channel information of the cell. The emergency alert table information may include a cell identifier and the channel information of the cell may include virtual channel information of the cell.

Claims

1. A method for receiving a broadcasting signal, the method comprising:

receiving emergency alert table information describing an emergency alert message and channel information of a cell from the broadcasting signal received from a first channel of a first cell which is a transmission area of the broadcasting signal;

outputting the emergency alert message using the received emergency alert table information;

handing over from the first cell to a second cell; and

obtaining an identifier of the second cell and continuously outputting the emergency alert message, which has been output from the first cell, from the second cell using the channel information of the cell.

2. The method according to claim 1, wherein the emergency alert table information includes the identifier of the cell.

3. The method according to claim 1, wherein the emergency alert table information includes at least one of virtual channel information for transmitting the emergency alert message, carrier frequency information, information on a program number of a channel for transmitting the emergency alert, and transport stream identifier.

4. The method according to claim 1, further comprising tuning the channel to a channel for transmitting the same broadcasting contents as broadcasting contents output from the first channel of the first cell, among channels of the second cell, using the channel information of the cell, if the output of the emergency alert message is finished.

5. The method according to claim 1, wherein the channel information of the cell is obtained from table information including virtual channel information of the identifier of the cell.

6. The method according to claim 1, wherein the identifier of the second cell is obtained from any one of a master guide table (MGT) of the received broadcasting signal, the emergency alert table information and signaling information of the received broadcasting signal.

7. The method according to claim 1, wherein the emergency alert table information includes a field for reporting priority of the alert.

8. A broadcasting signal receiver comprising:

a tuner configured to tune into a broadcasting signal transmitted by a first cell;

a demodulator configured to demodulate the tuned broadcasting signal;

a demultiplexer configured to demultiplex the demodulated broadcasting signal;

a program table information decoder configured to parse an emergency alert table in the demultiplexed broadcasting signal;

a decoder configured to decode an audio/video signal in the broadcasting signal parsed by the demultiplexer;

an output unit configured to output the broadcasting signal decoded by the decoder; and

a controller configured to control an emergency alert to be output using information obtained from the emergency alert table in the broadcasting signal of the first cell and control the emergency alert to be continuously output when handing over from the first cell to a second cell.

9. The broadcasting signal receiver according to claim 8, wherein the controller controls the emergency alert to be continuously output using a second cell identifier obtained from the second cell and channel information of the cell.

10. The broadcasting signal receiver according to claim 9, wherein the second cell identifier is obtained from any one of a master guide table (MGT) of the received broadcasting signal, emergency alert table information and signaling information of the received broadcasting signal.

11. The broadcasting signal receiver according to claim 9, wherein the channel information of the cell includes virtual channel information of the identifier of the cell.

12. The broadcasting signal receiver according to claim 9, wherein the controller controls the tuner to tune the channel to a channel for transmitting the same broadcasting contents as broadcasting contents output from the first channel of the first cell, among channels of the second cell, using the channel information of the cell, if the output of the emergency alert message is finished.

13. The broadcasting signal receiver according to claim 8, wherein the emergency alert table information includes at least one of virtual channel information for transmitting the emergency alert message, carrier frequency information, information on a program number of a channel for transmitting the emergency alert, and transport stream identifier.

14. The broadcasting signal receiver according to claim 8, wherein the emergency alert table information includes information indicating priority of the emergency.