Transmitting/receiving system and method for processing a broadcast signal

• US 10,405,061 B2
• Filed: 09/18/2017
• Issued: 09/03/2019
• 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
• Primary Examiner(s): Vu, Quoc Thai N
• Application Number:
  US15/707,672
• Publication Number:
  US 20180027303A1
• Time in Patent Office: Days
• 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

A method is provided for transmitting an emergency alert message by a broadcast transmitter. The broadcast transmitter first encodes service data and signaling data for a service, second encodes the first encoded service data and the first encoded signaling data, and Forward Error Correction (FEC) encodes transmission parameter data. The transmission parameter data includes encoding information of the service data. The broadcast transmitter modulates the second encoded service data, the second encoded signaling data, and the FEC encoded transmission parameter data, and transmits a broadcast signal including the modulated service data, the modulated signaling data, and the modulated transmission parameter data. The signaling data includes a first signaling table and a second signaling table.

Claims

1. A method of transmitting an emergency alert message by a broadcast transmitter, the method comprising:

first encoding, by an encoder circuit, service data and signaling data;

second encoding, by the encoder circuit, the service data and the signaling data;

encoding, by a signaling encoder circuit, transmission parameter data, wherein the transmission parameter data includes encoding information of the service data;

modulating, by a modulator, the service data, the signaling data, and the transmission parameter data; and

transmitting, by a Radio Frequency (RF) transmitter, a broadcast signal including the service data, the signaling data, and the transmission parameter data,

wherein the signaling data includes a first signaling table and a second signaling table,

wherein the first signaling table includes first service identification information to identify a service including the service data and type information to identify whether a type of the service is an emergency alert service,

wherein the second signaling table includes the emergency alert message,

wherein the emergency alert message includes text data for an emergency notification and priority information to specify a priority of the emergency alert message,

wherein the first signaling table and the second signaling table are delivered in Internet Protocol (IP) packets,

wherein access information for accessing the first signaling table is identical to access information for accessing the second signaling table, and

wherein the first signaling table and the second signaling table are identified by a value of a table identifier, respectively.

2. The method of claim 1, wherein the broadcast signal further comprises wake-up information to determine if a broadcast terminal should be switched to an active mode to receive the emergency alert message.

3. The method of claim 1, wherein the second signaling table further includes second service identification information to identify a broadcast service related to the emergency alert message.

4. The method of claim 1, wherein the access information for accessing the first signaling table and the second signaling table includes a well-known IP address and a well-known port number.

5. A broadcast transmitter for transmitting an emergency alert message, the broadcast transmitter comprising:

an encoder circuit configured to first encode service data and signaling data and second encode the service data and the signaling data;

a signaling encoder circuit configured to encode transmission parameter data, wherein the transmission parameter data includes encoding information of the service data;

a modulator configured to modulate the service data, the signaling data, and the transmission parameter data; and

a Radio Frequency (RF) transmitter configured to transmit a broadcast signal including the service data, the signaling data, and the transmission parameter data,

wherein the signaling data includes a first signaling table and a second signaling table,

wherein the first signaling table includes first service identification information to identify a service including the service data and type information to identify whether a type of the service is an emergency alert service,

wherein the second signaling table includes the emergency alert message,

wherein the emergency alert message includes text data for an emergency notification and priority information to specify a priority of the emergency alert message,

wherein the first signaling table and the second signaling table are delivered in Internet Protocol (IP) packets,

wherein access information for accessing the first signaling table is identical to access information for accessing the second signaling table, and

wherein the first signaling table and the second signaling table are identified by a value of a table identifier, respectively.

6. The broadcast transmitter of claim 5, wherein the broadcast signal further comprises wake-up information to determine if a broadcast terminal should be switched to an active mode to receive the emergency alert message.

7. The broadcast transmitter of claim 5, wherein the second signaling table further includes second service identification information to identify a broadcast service related to the emergency alert message.

8. The broadcast transmitter of claim 5, wherein the access information for accessing the first signaling table and the second signaling table includes a well-known IP address and a well-known port number.

9. A method of receiving an emergency alert message by a broadcast terminal, the method comprising:

receiving a broadcast signal including service data, signaling data, and transmission parameter data;

demodulating the broadcast signal;

decoding the transmission parameter data;

first decoding the service data and the signaling data; and

second decoding the service data and the signaling data,

wherein the transmission parameter data includes encoding information of the service data,

wherein the signaling data includes a first signaling table and a second signaling table,

wherein the first signaling table includes first service identification information to identify a service including the service data and type information to identify whether a type of the service is an emergency alert service,

wherein the second signaling table includes the emergency alert message,

wherein the emergency alert message includes text data for an emergency notification and priority information to specify a priority of the emergency alert message,

wherein the first signaling table and the second signaling table are received in Internet Protocol (IP) packets,

wherein access information for accessing the first signaling table is identical to access information for accessing the second signaling table, and

wherein the first signaling table and the second signaling table are identified by a value of a table identifier, respectively.

10. The method of claim 9, further comprising:

monitoring, by the broadcast terminal, wake-up information in the broadcast signal to determine if the broadcast terminal should be switched to an active mode to receive the emergency alert message.

11. The method of claim 9, wherein the second signaling table further includes second service identification information to identify a broadcast service related to the emergency alert message.

12. The method of claim 9, wherein the access information for accessing the first signaling table and the second signaling table includes a well-known IP address and a well-known port number.

13. A broadcast terminal for receiving an emergency alert message, the broadcast terminal comprising:

a tuner configured to receive a broadcast signal including service data, signaling data and transmission parameter data;

a demodulator configured to demodulate the broadcast signal;

a signaling decoder circuit configured to decode the transmission parameter data; and

a decoder circuit configured to first decode the service data and the signaling data and second decode the service data and the signaling data,

wherein the transmission parameter data includes encoding information of the service data,

wherein the signaling data includes a first signaling table and a second signaling table,

wherein the first signaling table includes first service identification information to identify a service including the service data and type information to identify whether a type of the service is an emergency alert service,

wherein the second signaling table includes the emergency alert message,

wherein the emergency alert message includes text data for an emergency notification and priority information to specify a priority of the emergency alert message,

wherein the first signaling table and the second signaling table are received in Internet Protocol (IP) packets,

wherein access information for accessing the first signaling table is identical to access information for accessing the second signaling table, and

wherein the first signaling table and the second signaling table are identified by a value of a table identifier, respectively.

14. The broadcast terminal of claim 13, wherein the broadcast terminal is configured to monitor wake-up information in the broadcast signal to determine if the broadcast terminal should be switched to an active mode to receive the emergency alert message.

15. The broadcast terminal of claim 13, wherein the second signaling table further includes second service identification information to identify a broadcast service related to the emergency alert message.

16. The broadcast terminal of claim 13, wherein the access information for accessing the first signaling table and the second signaling table includes a well-known IP address and a well-known port number.