Method of transmitting broadcast signal, method of processing broadcast signal and apparatus for the same

• US 7,681,216 B2
• Filed: 11/19/2007
• Issued: 03/16/2010
• Est. Priority Date: 11/22/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Yun, Chang Sik, Kim, Jin Pil
• Primary Examiner(s): Salce; Jason P
• Application Number:
  US11/984,540
• Publication Number:
  US 20080120645A1
• Time in Patent Office: 848 Days
• Field of Search: 725/33, 725 67- 68, 725 70- 71, 340/286.02, 455/404.1
• US Class Current: 725/33
• CPC Class Codes: G08B 27/008 with transmission via TV or radio broadcast
• CPC Class Codes: H04H 20/59 for emergency or urgency
• CPC Class Codes: H04H 60/25 Arrangements for updating broadcast information or broadcast-related information
• CPC Class Codes: H04H 60/43 for identifying broadcast channels
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• CPC Class Codes: H04N 21/434 Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream demultiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• 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 21/478 Supplemental services, e.g. displaying phone caller identification, shopping application
• 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 5/50 Tuning indicators; Automatic tuning control

Abstract

A method of processing a broadcast signal relevant to an emergency alert and a broadcast receiver for the same are disclosed, by which information on a channel for carrying an emergency alert broadcast can be prevented from being overlapped with information on other general channels. The present disclosure generating an emergency alert table including frequency information of an emergency alert channel, and transmitting a digital broadcasting signal including the emergency alert table, wherein the frequency information of the emergency alert channel is inserted in a descriptor that provides an additional pointer to the emergency alert channel, wherein the descriptor references the emergency alert channel by means of the frequency information.

Claims

1. A method of transmitting a digital broadcasting signal, comprising:

generating an emergency alert table including a plurality of data fields, wherein one of the data fields includes information that includes an emergency alert table descriptor, wherein the emergency alert table descriptor contains additional data fields, wherein the additional data fields indicate frequency information, program number information of an emergency alert channel and identification information of a service provider managing at least one area; and

transmitting, at a digital television broadcast transmitter, a digital broadcasting signal including the emergency alert table;

wherein the frequency information and the program number information of the emergency alert channel are inserted in the additional data fields that provide additional pointers to the emergency alert channel,

wherein the emergency alert table descriptor references the emergency alert channel by means of the frequency information, the program number information, and the identification information of the service provider managing at least one area.

2. The method of claim 1, wherein the channel number information includes an in-band major channel number and an in-band minor channel number of the emergency alert channel.

3. The method of claim 1, wherein the emergency alert table further includes alert priority information indicating a priority of alert.

4. The method of claim 1, wherein the service provider is a cable broadcast station.

5. A method of processing emergency alert information in a receiver, comprising:

receiving, at a digital broadcast receiver, a digital broadcasting signal including an emergency alert table containing a plurality of data fields, wherein one of the data fields includes information that includes an emergency alert table descriptor, wherein the emergency alert table descriptor contains additional data fields, wherein the additional data fields indicate frequency information, program number information of an emergency alert channel and identification information of a service provider managing at least one area;

parsing the emergency alert table and extracting the frequency information, the program number information and the identification information of the service provider managing at least one area from the emergency alert table descriptor included in the emergency alert table and extracting channel number information of the emergency alert channel from the emergency alert table; and

tuning to the emergency alert channel when a state of emergency channel tuning to the emergency alert channel occurs;

wherein the emergency alert channel is acquired from the channel number information.

6. The method of claim 5, wherein the channel number information includes an in-band major channel number and an in-band minor channel number of the emergency alert channel.

7. The method of claim 5, wherein the emergency alert table further includes alert priority information indicating a priority of alert.

8. The method of claim 5, wherein the service provider is a cable broadcast station.

9. A digital television receiver, comprising:

a tuner for receiving a digital broadcasting signal including an emergency alert table containing a plurality of data fields, wherein one of the data fields includes information that includes an emergency alert table descriptor, wherein the emergency alert table descriptor contains additional data fields, wherein the additional data fields indicate frequency information, program number information of an emergency alert channel, and identification information of a service provider managing at least one area;

a parser for parsing the emergency alert table and extracting the frequency information, the program number information and the identification information of the service provider managing at least one area from the emergency alert table descriptor included in the emergency alert table and channel number information of the emergency alert channel from the emergency alert table; and

a controller for controlling the tuner to tune to the emergency alert channel when a state of emergency channel tuning to the emergency alert channel occurs, wherein the emergency alert channel is acquired from the channel number information.

10. The digital television receiver of claim 9, wherein the channel number information includes an in-band major channel number and an in-band minor channel number of the emergency alert channel.

11. The digital television receiver of claim 9, wherein the emergency alert table further includes alert priority information indicating a priority of alert.

12. The method of claim 9, wherein the service provider is a cable broadcast station.