TRANSMITTING/RECEIVING SYSTEM AND METHOD FOR PROCESSING A BROADCAST SIGNAL

• US 20140120861A1
• Filed: 05/25/2012
• Published: 05/01/2014
• Est. Priority Date: 05/25/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kwak, Minsung, Kim, Jeongwoo
• Granted Patent: US 9,380,354 B2
• Time in Patent Office: Days
• US Class Current: 455/404.1
• CPC Class Codes: H04H 20/59 for emergency or urgency
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04N 19/89 involving methods or arrangements for detection of transmission errors at the decoder
• 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 21/4382 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 21/814 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: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 4/90 Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]

Abstract

According to the present invention, a method for processing a broadcast signal in a transmitting system that transmits an emergency alert message through a mobile broadcast network comprises the steps of: RS-CRC encoding of mobile service data containing an emergency alert message so as to generate an RS frame that belongs to an ensemble; dividing the RS frame into a plurality of RS frame portions; mapping the plurality of RS frame portions to data groups and inserting one FIC segment, TPC data, and a plurality of base data streams into each data group; trellis-encoding the data of the data groups; and transmitting a broadcast signal comprising the trellis-encoded data. At least one of either a FIC segment header contained in the FIC segment or the TPC data includes wake-up indication information for compulsorily placing a broadcast receiver into an active mode depending on the level of seriousness of the emergency alert message.

Claims

1. A method for processing a broadcast signal in a transmitting system, the method comprising:

performing Reed Solomon-Cyclic Redundancy Check (RS-CRC) encoding on mobile service data containing an emergency alert message and generating an RS frame belonging to an ensemble;

dividing the RS frame into a plurality of RS frame portions;

mapping the RS frame portions into each of data groups and inserting one fast information channel (FIC) segment and a plurality of known data sequences into each of the data groups;

performing trellis encoding on data of the data groups; and

transmitting the broadcast signal including the trellis-encoded data,

wherein an FIC chunk is configured with an FIC chunk header and FIC chunk payload, signals biding information between the ensemble and a mobile service included in the ensemble, and is divided into a plurality of FIC segment payloads, wherein the FIC segment is configured with an FIC segment header and one of the plurality of FIC segment payloads, and wherein the FIC segment header comprises wake-up indication information for compulsorily switching a broadcast receiver to an active mode according to a degree of severity of the emergency alert message.

2. The method according to claim 1, wherein the emergency alert message is transmitted in a Common Alerting Protocol (CAP) form or a syntax form.

3. The method according to claim 2, wherein the ensemble comprises at least one of a service map table (SMT) and an emergency alert table (EAT), wherein each of the SMT and the EAT comprises an ensemble identifier to identify the ensemble, and wherein identifying information for identifying whether the emergency alert message is in the CAP form or in the syntax form is signaled to at least one of the SMT and the EAT.

4. The method according to claim 3, wherein IP datagrams including the SMT and IP datagrams including the EAT are transmitted over a service signaling channel, and wherein all the IP datagrams transmitted over the service signaling channel have the same well-known IP address and the same well-known UDP port number.

5. The method according to claim 4, wherein the SMT and the EAT are identified using a table identifier included in each of the tables.

6. The method according to claim 3, wherein the FIC chunk payload comprises the ensemble identifier to identify the ensemble and indication information to indicate whether the EAT is transmitted over a service signaling channel included in the ensemble.

7. The method according to claim 3, further comprising:

including disaster-related additional information associated with the emergency alert message in at least one file; and

transmitting the at least file including the disaster-related additional information in non-real time (NRT).

8. The method according to claim 7, wherein the disaster-related additional information comprises at least one of a text, an image and a video associated with the emergency alert message, and wherein signaling information for the disaster-related additional information is signaled to at least one of the SMT and the EAT.

9. A transmitting system comprising:

a first encoder configured to perform Reed Solomon-Cyclic Redundancy Check (RS-CRC) encoding on mobile service data containing an emergency alert message and generate an RS frame belonging to an ensemble;

a divider configured to divide the RS frame into a plurality of RS frame portions;

a group formatter configured to map the RS frame portions into each of data groups and insert one fast information channel (FIC) segment and a plurality of known data sequences into each of the data groups;

a second encoder configured to perform trellis encoding on data of the data groups; and

a transmitting unit configured to transmit a broadcast signal including the trellis-encoded data,

wherein an FIC chunk is configured with an FIC chunk header and FIC chunk payload, signals biding information between the ensemble and a mobile service included in the ensemble, and is divided into a plurality of FIC segment payloads, wherein the FIC segment is configured with an FIC segment header and one of the plurality of FIC segment payloads, and wherein the FIC segment header comprises wake-up indication information for compulsorily switching a broadcast receiver to an active mode according to a degree of severity of the emergency alert message.

10. The transmitting system according to claim 9, wherein the emergency alert message is transmitted in a Common Alerting Protocol (CAP) form or a syntax form.

11. The transmitting system according to claim 10, wherein the ensemble comprises at least one of a service map table (SMT) and an emergency alert table (EAT), wherein each of the SMT and the EAT comprises an ensemble identifier to identify the ensemble, and wherein identifying information for identifying whether the emergency alert message is in the CAP form or in the syntax form is signaled to at least one of the SMT and the EAT.

12. The transmitting system according to claim 11, wherein IP datagrams including the SMT and IP datagrams including the EAT are transmitted over a service signaling channel, and wherein all the IP datagrams transmitted over the service signaling channel have the same well-known IP address and the same well-known UDP port number.

13. The transmitting system according to claim 11, wherein the FIC chunk payload comprises the ensemble identifier to identify the ensemble and indication information to indicate whether the EAT is transmitted over a service signaling channel included in the ensemble.

14. The transmitting system according to claim 11, wherein disaster-related additional information associated with the emergency alert message is included in at least one file and transmitted in non-real time (NRT).

15. The transmitting system according to claim 14, wherein the disaster-related additional information comprises at least one of a text, an image and a video associated with the emergency alert message, and wherein signaling information for the disaster-related additional information is signaled to at least one of the SMT and the EAT.