CN112954468A - Method for awakening emergency broadcast by subcarrier, IPTV set top box and system - Google Patents

Method for awakening emergency broadcast by subcarrier, IPTV set top box and system Download PDF

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Publication number
CN112954468A
CN112954468A CN202110248100.6A CN202110248100A CN112954468A CN 112954468 A CN112954468 A CN 112954468A CN 202110248100 A CN202110248100 A CN 202110248100A CN 112954468 A CN112954468 A CN 112954468A
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emergency
iptv
broadcast
top box
video
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张玥桐
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H04N21/4622—Retrieving content or additional data from different sources, e.g. from a broadcast channel and the Internet
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/44—Arrangements characterised by circuits or components specially adapted for broadcast
    • H04H20/46—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95
    • H04H20/47—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems
    • H04H20/48—Arrangements characterised by circuits or components specially adapted for broadcast specially adapted for broadcast systems covered by groups H04H20/53-H04H20/95 specially adapted for stereophonic broadcast systems for FM stereophonic broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
    • H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/443—OS processes, e.g. booting an STB, implementing a Java virtual machine in an STB or power management in an STB
    • H04N21/4436—Power management, e.g. shutting down unused components of the receiver

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Databases & Information Systems (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • General Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The invention discloses a method for awakening emergency broadcast by subcarrier, an IPTV set-top box and a system, wherein the method comprises the following steps: the method comprises the steps that a frequency modulation subcarrier receiving module and a frequency modulation subcarrier decryption analysis module acquire emergency messages from frequency modulation subcarrier broadcast signals, the emergency messages comprise emergency instructions and emergency information, and the emergency information is emergency broadcast content; the IPTV receiving module obtains an IPTV program from an IPTV broadcast television signal; the first control module receives the emergency message, executes the emergency instruction and wakes up the IPTV set-top box in advance for a necessary time period; the first control module converts the media type of the emergency broadcast content and synthesizes the emergency broadcast content to output the emergency broadcast content. The invention realizes real-time detection and receiving of emergency messages in frequency modulation subcarrier broadcast signals and awakening of an IPTV set top box for emergency broadcasting.

Description

Method for awakening emergency broadcast by subcarrier, IPTV set top box and system
Technical Field
The invention belongs to the technical field of emergency broadcasting, and particularly relates to a method for awakening emergency broadcasting by subcarrier, an IPTV set top box and a system.
Background
The interactive network television IPTV set-top box receives, demodulates, demultiplexes and decodes IPTV broadcast television signals to obtain broadcast television program data, and outputs the broadcast television program data to a television for playing. When natural disasters or social public events occur, the emergency broadcast management platform sends emergency messages to the IPTV set top box. The IPTV set top box has the problem of how to respond to the emergency message and play the emergency broadcast when being turned off, standby or playing programs.
The existing emergency broadcast system inserts the emergency message into the IPTV broadcast television signal, and the IPTV set-top box receives and separates the emergency message, and the disadvantage is that the IPTV receiving module and the main control module 7 x 24 of the IPTV set-top box need to run in real time, and because the IPTV signal needs high-frequency components for receiving, demodulating and decoding, and the data volume for processing the IPTV broadcast television signal is large, the power consumption for the IPTV set-top box to detect the emergency message in real time is large, and the data processing is complex.
The bandwidth of FM broadcast stereo channel is about 200KHz, while the main carrier audio only occupies about half of the frequency, the rest part is unused, and the part is not called as subcarrier. The frequency modulation subcarrier technology is to transmit data signals by utilizing subcarriers, and one frequency modulation frequency can realize the simultaneous transmission of audio signals and coded signals. The FM subcarrier technology is classified into FM-SCA (chinese standard, national standard GB4311.3-84, subcarrier frequency 67 KHz), FM-RDS broadcast (european standard, subcarrier frequency 57KHz), FM-RBDS broadcast (american standard, subcarrier frequency 57KHz), and FM-DARC broadcast (japanese standard, subcarrier frequency 76 KHz).
Therefore, based on the above existing problems, the present invention provides a new technical method by combining the frequency modulation subcarrier with the IPTV set-top box in consideration of small data amount of the frequency modulation subcarrier, low processing complexity, and low power consumption, so as to solve the problem of how to respond to the emergency message and play the emergency broadcast when the IPTV set-top box is turned off, in standby, or in playing programs.
Disclosure of Invention
The invention aims to provide a method for awakening emergency broadcast by subcarrier, an IPTV set top box and a system, and aims to solve the problem of how to respond to emergency message and play the emergency broadcast by the IPTV set top box.
In order to achieve the purpose, the invention provides the following technical scheme:
method, IPTV set-top box and system for waking up emergency broadcast by subcarrier, wherein,
in one aspect of the present invention, a method for waking up an emergency broadcast by a subcarrier is provided, which includes the following steps:
(1) when the IPTV set top box is turned off or is in standby or plays programs, the frequency modulation subcarrier receiving module receives frequency modulation subcarrier broadcasting signals, frequency modulation subcarrier data are obtained through demodulation and decoding, and then the frequency modulation subcarrier decryption and analysis module decrypts and analyzes the frequency modulation subcarrier data to obtain emergency messages;
the frequency modulation subcarrier broadcast is one of FM-SCA broadcast, FM-RDS broadcast, FM-RBDS broadcast and FM-DARC broadcast;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content;
(2) when the IPTV set-top box plays a program, the IPTV receiving module receives an IPTV broadcast television signal, and video and audio data of the IPTV program are obtained after demodulation, demultiplexing and decoding;
(3) the first control module receives an emergency message, executes an emergency instruction, and wakes up the IPTV set-top box in advance for a necessary time period, wherein the necessary time period refers to the time required by the IPTV set-top box from being woken up to outputting emergency broadcast playing content;
(4) the first control module directly converts the media type of the emergency broadcast content, or controls the output module to convert the media type of the emergency broadcast content after transmitting the emergency broadcast content to the output module;
(5) the first control module enables the output module to carry out synthesis processing on the emergency broadcast content to obtain emergency broadcast playing content;
(6) the first control module controls the output module to output the emergency broadcast playing content to the playing device, wherein the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
Further, in the step (1),
the emergency instruction comprises a target area code, a playing date and time, a synthesizing mode and a playing media type;
the synthesis mode is one of cutting and broadcasting, picture-in-picture and superimposed captions;
the playing media type is one of text, pictures, audio, video, audio and video and streaming media;
the emergency information consists of a text file, a picture file, an audio file, a video-audio file or a streaming media file.
Further, in the step (1),
the IPTV set top box is powered off when the main control module, the IPTV receiving module and the output module are powered off;
the IPTV set top box is in standby state, the main control module is in sleep state, and the IPTV receiving module and the output module are powered off;
the IPTV set-top box plays a program, the main control module sets receiving parameters of the IPTV receiving module, the IPTV receiving module receives IPTV broadcast television signals, and after demodulation, demultiplexing and decoding, the currently played video and audio data of the IPTV program is output by the output module controlled by the main control module;
in step (3), the method for waking up the set top box is as follows:
(a1) if the set-top box is powered off, the first control module enables the output module to be powered on and initialized;
(a2) if the set-top box is in standby state, the first control module enables the output module to be powered on and initialized;
(a3) if the set-top box plays the program, the first control module does not have the awakening operation.
Further, the IPTV set-top box has a unique code, and in step (3), before executing the emergency instruction, the first control module checks the emergency message, and the specific method is as follows:
(c1) checking whether the format of the emergency command conforms to a preset format, and if not, returning to the step 1;
(c2) checking whether the target area code of the emergency command is matched with the code of the IPTV set-top box, if not, returning to the step 1;
(c3) checking whether the playing date and time of the emergency instruction is less than the current date and time, if not, returning to the step 1;
(c4) checking whether the format of the emergency information accords with a preset format, and if not, returning to the step 1;
(c5) checking whether the content of the emergency information is legal or not, and if not, returning to the step 1;
the method for checking whether the content of the emergency information is legal is as follows:
(d1) if the emergency information is a text, cutting words, sequentially searching a prestored illegal word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d2) if the emergency information is a picture, firstly, extracting a text from the picture, searching a prestored illegal word library, and if the emergency information is a matched word library, judging the word library to be illegal, and secondly, searching the picture in the prestored illegal picture library, and if the emergency information is a matched word library, judging the word library to be illegal;
(d3) if the emergency information is audio, converting the audio into characters, searching a pre-stored illegal character word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d4) if the emergency information is a video, firstly, framing the video, secondly, extracting characters from the video frame, searching a pre-stored illegal word library, and if the emergency information is a video, judging that the emergency information is illegal, and thirdly, searching the video frame for the pre-stored illegal picture library, and if the emergency information is a video, judging that the emergency information is illegal;
(d5) if the emergency information is video and audio, firstly, checking audio, extracting audio from the video and audio, converting the audio into text, retrieving a prestored illegal word library if the emergency information is matched with the audio, secondly, checking video, extracting video from the video and audio, framing the video, extracting characters from video frames, retrieving the prestored illegal word library if the emergency information is matched with the audio, and then retrieving the video frames from the prestored illegal picture library if the emergency information is matched with the audio;
(d6) if the emergency information is a streaming media, firstly, checking the audio stream, extracting the audio stream from the streaming media, then, converting the audio stream into a text, retrieving a pre-stored illegal word stock, if the emergency information is a streaming media, then, checking the video stream, extracting the video stream from the streaming media, framing the video, then, extracting characters from the video frame, retrieving the pre-stored illegal word stock, if the emergency information is a streaming media, then, retrieving the video frame from the pre-stored illegal picture stock, if the emergency information is a streaming media, then, illegally obtaining the video frame from the video frame.
Further, in the step (4), the media type of the emergency broadcast content is converted into one of text, picture, audio, video, audio-video and streaming media;
in step (5), the emergency broadcast content is synthesized by:
(b1) if the emergency command is cut-and-broadcast, then: the method comprises the steps of firstly, stopping outputting the IPTV program played currently if the IPTV program is played currently, and secondly, directly replacing emergency broadcast contents;
(b2) if the synthesis mode of the emergency instruction is picture-in-picture, overlapping the emergency broadcast content to the picture-in-picture area of the video picture of the IPTV program which is played currently, and synthesizing a new program video;
(b3) and if the synthesis mode of the emergency command is the caption superposition, superposing the emergency broadcast content to the caption area of the video picture of the IPTV program which is played currently to synthesize a new program video.
In another aspect of the present invention, an IPTV set-top box for waking up emergency broadcast by subcarrier is provided, which includes a frequency modulation subcarrier receiving module, a frequency modulation subcarrier decryption and analysis module, a first control module, a main control module, an IPTV receiving module, and an output module;
the frequency modulation subcarrier receiving module is connected with the frequency modulation subcarrier decryption analysis module, receives the frequency modulation subcarrier broadcast signals, demodulates and decodes the frequency modulation subcarrier broadcast signals to obtain frequency modulation subcarrier data, and transmits the frequency modulation subcarrier data to the frequency modulation subcarrier decryption analysis module;
the frequency modulation subcarrier decryption and analysis module is connected with the first control module, decrypts and analyzes frequency modulation subcarrier data to obtain emergency information, and transmits the emergency information to the first control module;
the frequency modulation subcarrier broadcast is one of FM-SCA broadcast, FM-RDS broadcast, FM-RBDS broadcast and FM-DARC broadcast;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content;
the IPTV receiving module receives IPTV broadcast television signals according to receiving parameters set by the main control module, and obtains IPTV programs after demodulation, demultiplexing and decoding;
the first control module is connected with the output module, receives the emergency message, executes the emergency instruction and wakes up the IPTV set-top box in advance for a necessary time period; the necessary time period refers to the time required by the IPTV set top box from being awakened to outputting emergency broadcast playing content;
the main control module is connected with the IPTV receiving module and the output module, and is used for setting receiving parameters of the IPTV receiving module and enabling the output module to output IPTV programs;
the first control module firstly directly converts the media type of the emergency broadcast content, or controls the output module to convert the media type of the emergency broadcast content after the emergency broadcast content is transmitted to the output module, secondly enables the output module to synthesize the emergency broadcast content to obtain the emergency broadcast content, and finally controls the output module to output the emergency broadcast content to the playing equipment;
the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
The IPTV set top box further comprises a user response module which is connected with the main control module and the first control module and responds to user operation, under the condition of standby or program playing, the IPTV set top box shields the response user operation before the emergency broadcast playing, and restores the response user operation after the emergency broadcast playing.
And the emergency broadcast playing system further comprises an external startup and shutdown module which is connected with the first control module to detect the startup and shutdown state of the playing device and control the startup and shutdown of the playing device, and the playing device is started before the emergency broadcast is played.
The emergency broadcast system further comprises a storage module connected with the first control module, and the storage content of the storage module comprises emergency instructions, emergency information, emergency broadcast content and emergency broadcast playing content.
In another aspect of the present invention, a system for waking up an emergency broadcast by a subcarrier is also provided, which includes an emergency broadcast management platform, a frequency modulation subcarrier transmission network, an IPTV transmission network, and an IPTV set-top box;
the emergency broadcast management platform generates an emergency message;
the frequency modulation subcarrier transmission network receives the emergency message from the emergency broadcast management platform, performs frequency modulation subcarrier broadcasting and then transmits the emergency message to the IPTV set top box;
the IPTV transmission network receives and transmits IPTV programs to an IPTV set-top box;
the frequency modulation subcarrier broadcast is one of FM-SCA broadcast, FM-RDS broadcast, FM-RBDS broadcast and FM-DARC broadcast;
the emergency message comprises an emergency instruction and emergency information; the emergency information is emergency broadcast content.
Compared with the prior art, the invention has the following beneficial effects:
1) the frequency modulation subcarrier receiving module, the frequency modulation subcarrier decryption and analysis module and the first control module can receive frequency modulation subcarrier broadcast signals in real time within 7-24 hours, detect and receive emergency messages in frequency modulation subcarrier data, wake up the IPTV set top box in time and transmit emergency instructions and the emergency messages to the main control module; the main control module obtains the emergency broadcast content, and converts, synthesizes and plays the emergency broadcast content according to the emergency instruction. The invention realizes real-time detection and receiving of emergency messages in the frequency modulation subcarrier, and further awakens the IPTV set-top box to carry out emergency broadcasting.
2) The frequency modulation subcarrier receiving module, the frequency modulation subcarrier decryption analysis module and the first control module are used for detecting and receiving the emergency message in the frequency modulation subcarrier in real time, the processing data volume is small, the power consumption is low, the method is different from a common IPTV set top box which receives the IPTV broadcast television signal in real time and detects and receives the emergency message from the IPTV data, and relates to a high-frequency processing component, the power consumption is large, and the processing data volume is large. The invention has the advantages of reducing data processing amount, reducing power consumption for detecting emergency messages and reducing standby power consumption.
3) Before executing the emergency instruction and awakening the IPTV set-top box, the emergency message is checked, specifically, the format of the emergency instruction, the target area code, the playing date and time and the format and content of the emergency message are checked, invalid or illegal emergency messages are not processed, and the IPTV set-top box is not awakened. The invention ensures the safe playing of the IPTV set-top box and avoids misoperation.
4) The first control module receives the emergency message, executes the emergency instruction, and wakes up the IPTV set-top box in advance for a necessary time period, wherein the necessary time period refers to the time required by the IPTV set-top box from being woken up to outputting emergency broadcast playing content. The invention realizes time accurate awakening of the IPTV set-top box, and the IPTV set-top box is not awakened once receiving the emergency message to cause white power consumption, or is not awakened before the emergency broadcast playing moment to cause playing delay.
5) When the IPTV set top box is turned off or is in standby or plays programs, the IPTV set top box end wakes up the IPTV set top box in a self-adaptive manner, related modules awakened in different states are different, only the module awakened for emergency broadcast playing is ensured to be awakened, and the unrelated modules are not awakened. The invention realizes the optimization of the emergency broadcast playing power consumption.
6) The media type of the emergency broadcast content can be different from the playing media type of the emergency broadcast playing content, the emergency broadcast playing content is obtained by converting the media type of the emergency broadcast content at the IPTV set-top box end in a self-adaptive manner and then synthesizing the emergency broadcast content, and the length of the emergency message can be shortened. The invention improves the distribution efficiency of the emergency message and also improves the efficiency of the set top box for receiving the emergency message.
7) Processing the received emergency message, converting the media types of the emergency broadcast contents, synthesizing the emergency broadcast contents to obtain emergency broadcast playing contents, and outputting the emergency broadcast playing contents to playing equipment, wherein the playing equipment is one of text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment; different from the common IPTV set-top box which can only output to a television or a sound box, the invention expands the output mode of the IPTV set-top box for emergency broadcasting by converting the emergency broadcasting content into the media type firstly and then synthesizing and finally outputting, and supports text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment.
8) And the user response module responds to the user operation, shields the user operation before the emergency broadcast is played and restores the user operation after the emergency broadcast is played under the condition that the IPTV set-top box is in a standby state or plays programs. The method is different from the method that the general IPTV set top box can be interrupted by user operation when playing emergency broadcasting, so that the emergency broadcasting cannot be played completely; the method is also different from the method that the set-top box state is reported to the emergency broadcast management platform before and after the emergency broadcast is played by some IPTV set-top boxes, and then the emergency broadcast management platform remotely controls whether to respond to the user operation. The invention realizes that the set-top box autonomously processes and responds to the user operation, has high efficiency and ensures the complete playing of the emergency broadcast.
9) And the peripheral on-off module is connected with the main control module to detect the on-off state of the playing equipment and control the on-off of the playing equipment, and the playing equipment is started before the emergency broadcast is played. The invention realizes that the IPTV set-top box and the external playing equipment jointly send the emergency broadcast to the user, thereby ensuring the playing of the emergency broadcast.
10) The invention relates to an IPTV set top box capable of awakening emergency broadcast by subcarrier, which comprises a frequency modulation subcarrier receiving module, a frequency modulation subcarrier decryption analysis module, a first control module, a main control module, an IPTV receiving module, an output module, a user response module, an external on-off module and a storage module.
11) The invention relates to a system consisting of an emergency broadcast management platform, a frequency modulation subcarrier transmission network, an IPTV transmission network and an IPTV set-top box, which realizes a system that the IPTV set-top box responds to emergency messages from frequency modulation subcarrier signals and plays emergency broadcasts; the invention receives emergency information from a frequency modulation subcarrier signal, the distribution path of emergency broadcast is that an emergency broadcast management platform transmits to a frequency modulation subcarrier transmission network, the frequency modulation subcarrier transmission network transmits to an IPTV set-top box with frequency modulation subcarrier receiving processing, while a general emergency broadcast system using the IPTV set-top box as a terminal receives the emergency information from an IPTV broadcast television signal, the distribution path of emergency broadcast is that the emergency broadcast management platform transmits to the IPTV transmission network, and the IPTV transmission network transmits to the IPTV set-top box; the invention improves the distribution efficiency of the emergency message and reduces the operation and maintenance power consumption of the system by utilizing the advantages of large broadcast coverage range, convenient receiving and low detection power consumption of the frequency modulation subcarrier.
Drawings
FIG. 1 is a flowchart illustrating a method for waking up an emergency broadcast by a subcarrier according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an IPTV set-top box for waking up emergency broadcast by subcarriers according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for waking up emergency broadcast by subcarriers according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and the embodiments.
Embodiments a method, IPTV set-top box and system for waking up emergency broadcasts by sub-carriers, as shown in fig. 1-3, wherein,
in one aspect of this embodiment, a method for waking up an emergency broadcast by a subcarrier includes the following steps:
(1) when the IPTV set-top box 400 is turned off or is in standby or plays a program, the frequency modulation subcarrier receiving module 1 receives a frequency modulation subcarrier broadcast signal, demodulates and decodes the frequency modulation subcarrier broadcast signal to obtain frequency modulation subcarrier data, and then decrypts and analyzes the frequency modulation subcarrier data by the frequency modulation subcarrier decryption and analysis module 2 to obtain an emergency message;
the FM subcarrier broadcasting is one of FM-SCA broadcasting, FM-RDS broadcasting, FM-RBDS broadcasting and FM-DARC broadcasting;
the emergency message comprises an emergency instruction and emergency information;
emergency information, which is emergency broadcast content;
(2) when the IPTV set-top box 400 plays a program, the IPTV receiving module 5 receives an IPTV broadcast television signal, and obtains IPTV program audio and video data after demodulation, demultiplexing, and decoding;
(3) the first control module 3 receives the emergency message, executes the emergency instruction, and wakes up the IPTV set-top box 400 in advance for a necessary time period, where the necessary time period refers to the time required by the IPTV set-top box 400 from being woken up to outputting the emergency broadcast playing content;
(4) the first control module 3 directly converts the media type of the emergency broadcast content, or controls the output module 6 to convert the media type of the emergency broadcast content after transmitting the emergency broadcast content to the output module 6;
(5) the first control module 3 makes the output module 6 synthesize the emergency broadcast content to obtain the emergency broadcast playing content;
(6) the first control module 3 controls the output module 6 to output the emergency broadcast content to the playing device, wherein the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device, and a streaming media playing device.
Further, in the step (1),
the emergency instruction comprises a target area code, a playing date and time, a synthesizing mode and a playing media type;
the synthesis mode is one of cutting and broadcasting, picture-in-picture and superimposed caption;
the playing media type is one of text, pictures, audio, video, audio and video and streaming media;
the emergency information consists of a text file or a picture file or an audio file or a video-audio file or a streaming media file.
Further, in the step (1),
the IPTV set-top box 400 is powered off, namely the main control module 4, the IPTV receiving module 5 and the output module 6 are powered off;
the IPTV set-top box 400 is in standby state, the main control module 4 is in sleep state, and the IPTV receiving module 5 and the output module 6 are powered off;
the IPTV set-top box 400 plays a program, the main control module 4 sets receiving parameters of the IPTV receiving module 5, the IPTV receiving module 5 receives IPTV broadcast television signals, and after demodulation, demultiplexing and decoding, the currently played IPTV program video and audio data is output by the output module 6 controlled by the main control module 4;
in step (3), the method for waking up the set top box is as follows:
(a1) if the set-top box is powered off, the first control module 3 powers on and initializes the output module 6;
(a2) if the set-top box is in standby state, the first control module 3 enables the output module 6 to be powered on and initialized;
(a3) if the set-top box plays the program, the first control module 3 has no wake-up operation.
Further, the IPTV set-top box 400 has a unique code, and in step (3), before executing the emergency instruction, the first control module 3 checks the emergency message, which includes:
(c1) checking whether the format of the emergency command conforms to a preset format, and if not, returning to the step 1;
(c2) checking whether the target area code of the emergency command is matched with the code of the IPTV set-top box 400, if not, returning to the step 1;
(c3) checking whether the playing date and time of the emergency instruction is less than the current date and time, if not, returning to the step 1;
(c4) checking whether the format of the emergency information accords with a preset format, and if not, returning to the step 1;
(c5) checking whether the content of the emergency information is legal or not, and if not, returning to the step 1;
the method for checking whether the content of the emergency information is legal is as follows:
(d1) if the emergency information is a text, cutting words, sequentially searching a prestored illegal word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d2) if the emergency information is a picture, firstly, extracting a text from the picture, searching a prestored illegal word library, and if the emergency information is a matched word library, judging the word library to be illegal, and secondly, searching the picture in the prestored illegal picture library, and if the emergency information is a matched word library, judging the word library to be illegal;
(d3) if the emergency information is audio, converting the audio into characters, searching a pre-stored illegal character word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d4) if the emergency information is a video, firstly, framing the video, secondly, extracting characters from the video frame, searching a pre-stored illegal word library, and if the emergency information is a video, judging that the emergency information is illegal, and thirdly, searching the video frame for the pre-stored illegal picture library, and if the emergency information is a video, judging that the emergency information is illegal;
(d5) if the emergency information is video and audio, firstly, checking audio, extracting audio from the video and audio, converting the audio into text, retrieving a prestored illegal word library if the emergency information is matched with the audio, secondly, checking video, extracting video from the video and audio, framing the video, extracting characters from video frames, retrieving the prestored illegal word library if the emergency information is matched with the audio, and then retrieving the video frames from the prestored illegal picture library if the emergency information is matched with the audio;
(d6) if the emergency information is a streaming media, firstly, checking the audio stream, extracting the audio stream from the streaming media, then, converting the audio stream into a text, retrieving a pre-stored illegal word stock, if the emergency information is a streaming media, then, checking the video stream, extracting the video stream from the streaming media, framing the video, then, extracting characters from the video frame, retrieving the pre-stored illegal word stock, if the emergency information is a streaming media, then, retrieving the video frame from the pre-stored illegal picture stock, if the emergency information is a streaming media, then, illegally obtaining the video frame from the video frame.
Further, in the step (4), converting the media type of the emergency broadcast content into one of text, picture, audio, video, audio and streaming media;
in step (5), the emergency broadcast content is synthesized by:
(b1) if the emergency command is cut-and-broadcast, then: the method comprises the steps of firstly, stopping outputting the IPTV program played currently if the IPTV program is played currently, and secondly, directly replacing emergency broadcast contents;
(b2) if the synthesis mode of the emergency instruction is picture-in-picture, overlapping the emergency broadcast content to the picture-in-picture area of the video picture of the IPTV program which is played currently, and synthesizing a new program video;
(b3) and if the synthesis mode of the emergency command is the caption superposition, superposing the emergency broadcast content to the caption area of the video picture of the IPTV program which is played currently to synthesize a new program video.
In another aspect of this embodiment, an IPTV set-top box for waking up emergency broadcast by subcarriers is provided, which includes a frequency modulation subcarrier receiving module 1, a frequency modulation subcarrier decryption and analysis module 2, a first control module 3, a main control module 4, an IPTV receiving module 5, and an output module 6;
the frequency modulation subcarrier receiving module 1 is connected with the frequency modulation subcarrier decryption analysis module 2, receives the frequency modulation subcarrier broadcast signals, demodulates and decodes the frequency modulation subcarrier broadcast signals to obtain frequency modulation subcarrier data, and transmits the frequency modulation subcarrier data to the frequency modulation subcarrier decryption analysis module 2;
the frequency modulation subcarrier decryption and analysis module 2 is connected with the first control module 3, decrypts and analyzes frequency modulation subcarrier data to obtain an emergency message, and transmits the emergency message to the first control module 3;
the FM subcarrier broadcasting is one of FM-SCA broadcasting, FM-RDS broadcasting, FM-RBDS broadcasting and FM-DARC broadcasting;
the emergency message comprises an emergency instruction and emergency information;
emergency information, which is emergency broadcast content;
the IPTV receiving module 5 receives the IPTV broadcast television signals according to the receiving parameters set by the main control module 4, and obtains IPTV programs after demodulation, demultiplexing and decoding;
the first control module 3 is connected with the output module 6, receives the emergency message, executes the emergency instruction, and wakes up the IPTV set-top box 400 in advance by a necessary time period; a necessary time period, which refers to a time required for the IPTV set-top box 400 to output emergency broadcast content from being woken up;
the main control module 4 is connected with the IPTV receiving module 5 and the output module 6, and is used for setting receiving parameters of the IPTV receiving module 5 and enabling the output module 6 to output IPTV programs;
the first control module 3 firstly directly converts the media type of the emergency broadcast content, or controls the output module 6 to convert the media type of the emergency broadcast content after transmitting the emergency broadcast content to the output module 6, secondly enables the output module 6 to synthesize the emergency broadcast content to obtain the emergency broadcast content, and finally controls the output module 6 to output the emergency broadcast content to the playing device;
the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
Further, the system further comprises a user response module 7 which is connected with the main control module 4 and the first control module 3 to respond to user operation, and under the condition that the IPTV set-top box 400 is in standby or plays programs, the response user operation is shielded before the emergency broadcast is played, and the response user operation is recovered after the emergency broadcast is played.
Further, the emergency broadcast system also comprises an external startup and shutdown module 8 which is connected with the first control module 3 to detect the startup and shutdown state of the playing device and control the startup and shutdown of the playing device, and the playing device is started before the emergency broadcast is played.
Further, the emergency broadcast emergency control system further comprises a storage module 9 connected with the first control module 3, and the storage content of the storage module 9 comprises emergency instructions, emergency information, emergency broadcast content and emergency broadcast playing content.
Further, the core model of the first control module 3 is STM32F030C8, and the core model of the main control module 4 is haisi hi3798MV 200.
In another aspect of this embodiment, a system for waking up an emergency broadcast by a subcarrier is further provided, which includes an emergency broadcast management platform 100, a frequency modulation subcarrier transmission network 200, an IPTV transmission network 300, and an IPTV set-top box 400;
the emergency broadcast management platform 100 generates an emergency message;
the fm subcarrier transmission network 200 receives the emergency message from the emergency broadcast management platform 100, performs fm subcarrier broadcasting, and transmits the fm subcarrier broadcast to the IPTV set-top box 400;
an IPTV transmission network 300 for receiving and transmitting an IPTV program to an IPTV set-top box 400;
the FM subcarrier broadcasting is one of FM-SCA broadcasting, FM-RDS broadcasting, FM-RBDS broadcasting and FM-DARC broadcasting;
the emergency message comprises an emergency instruction and emergency information; the emergency information is emergency broadcast content.
As can be seen from this embodiment, the present invention has the following advantages:
1) the frequency modulation subcarrier receiving module 1, the frequency modulation subcarrier decryption and analysis module 2 and the first control module 3 can receive frequency modulation subcarrier broadcast signals in real time for 7-24 hours, detect and receive emergency messages in frequency modulation subcarrier data, wake up the IPTV set top box 400 in time and transmit the emergency instructions and the emergency messages to the main control module 4; the main control module 4 obtains the emergency broadcast content, and converts, synthesizes and plays the emergency broadcast content according to the emergency instruction. The invention realizes real-time detection and receiving of emergency messages in the frequency modulation subcarrier, and further awakens the IPTV set-top box to carry out emergency broadcasting.
2) The frequency modulation subcarrier receiving module 1, the frequency modulation subcarrier decryption analysis module 2 and the first control module 3 are used for detecting and receiving the emergency message in the frequency modulation subcarrier in real time, the processing data volume is small, the power consumption is low, the method is different from a common IPTV set top box for receiving the IPTV broadcast television signal in real time and detecting and receiving the emergency message from the IPTV data, and relates to a high-frequency processing component, the power consumption is large, and the processing data volume is large. The invention has the advantages of reducing data processing amount, reducing power consumption for detecting emergency messages and reducing standby power consumption.
3) Before executing the emergency instruction and waking up the IPTV set-top box 400, the emergency message is checked, specifically, the format of the emergency instruction, the target area code, the play date and time, and the format and content of the emergency message are checked, and the invalid or illegal emergency message is not processed, and the IPTV set-top box 400 is not woken up. The invention ensures the safe playing of the IPTV set-top box and avoids misoperation.
4) The first control module 3 receives the emergency message, executes the emergency command, and wakes up the IPTV set-top box 400 in advance for a necessary time period, where the necessary time period refers to the time required by the IPTV set-top box 400 from being woken up to outputting the emergency broadcast content. The invention realizes time accurate awakening of the IPTV set-top box, and the IPTV set-top box is not awakened once receiving the emergency message to cause white power consumption, or is not awakened before the emergency broadcast playing moment to cause playing delay.
5) When the IPTV set-top box 400 is turned off or is in standby or plays a program, the IPTV set-top box 400 adaptively wakes up the IPTV set-top box 400, and related modules awakened in different states are different, so that only the module for waking up the emergency broadcast play is ensured, and the unrelated modules are not woken up. The invention realizes the optimization of the emergency broadcast playing power consumption.
6) The media type of the emergency broadcast content can be different from the playing media type of the emergency broadcast playing content, and the emergency broadcast playing content can be obtained by adaptively converting the media type of the emergency broadcast content at the IPTV set top box 400 and then synthesizing the emergency broadcast content, so that the length of the emergency message can be shortened. The invention improves the distribution efficiency of the emergency message and also improves the efficiency of the set top box for receiving the emergency message.
7) Processing the received emergency message, converting the media types of the emergency broadcast contents, synthesizing the emergency broadcast contents to obtain emergency broadcast playing contents, and outputting the emergency broadcast playing contents to playing equipment, wherein the playing equipment is one of text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment; different from the common IPTV set-top box, the set-top box can only output to a television or a sound box. The invention expands the output mode of the IPTV set top box for emergency broadcasting by converting the emergency broadcasting content into the media types, synthesizing and outputting the emergency broadcasting content, and supports text playing equipment, picture playing equipment, audio playing equipment, video and audio playing equipment and streaming media playing equipment.
8) The user response module 7 responds to the user operation, and shields the response user operation before the emergency broadcast is played and restores the response user operation after the emergency broadcast is played under the condition that the IPTV set-top box 400 is in a standby state or plays a program. The method is different from the method that the general IPTV set top box can be interrupted by user operation when playing emergency broadcasting, so that the emergency broadcasting cannot be played completely; the method is also different from the method that the set-top box state is reported to the emergency broadcast management platform before and after the emergency broadcast is played by some IPTV set-top boxes, and then the emergency broadcast management platform remotely controls whether to respond to the user operation. The invention realizes that the set-top box autonomously processes and responds to the user operation, has high efficiency and ensures the complete playing of the emergency broadcast.
9) And the peripheral on-off module 8 is connected with the main control module 4 to detect the on-off state of the playing equipment and control the on-off of the playing equipment, and the playing equipment is started before the emergency broadcast is played. The invention realizes that the IPTV set-top box and the external playing equipment jointly send the emergency broadcast to the user, thereby ensuring the playing of the emergency broadcast.
10) The invention is composed of a frequency modulation subcarrier receiving module 1, a frequency modulation subcarrier decryption analysis module 2, a first control module 3, a main control module 4, an IPTV receiving module 5, an output module 6, a user response module 7, an external on-off module 8 and a storage module 9.
11) The invention relates to a system consisting of an emergency broadcast management platform 100, a frequency modulation subcarrier transmission network 200, an IPTV transmission network 300 and an IPTV set-top box 400, and realizes a system which enables the IPTV set-top box to respond to emergency messages from frequency modulation subcarrier signals and play emergency broadcasts; the invention receives emergency information from a frequency modulation subcarrier signal, the distribution path of emergency broadcast is that an emergency broadcast management platform transmits to a frequency modulation subcarrier transmission network, the frequency modulation subcarrier transmission network transmits to an IPTV set-top box with frequency modulation subcarrier receiving processing, while a general emergency broadcast system using the IPTV set-top box as a terminal receives the emergency information from an IPTV broadcast television signal, the distribution path of emergency broadcast is that the emergency broadcast management platform transmits to the IPTV transmission network, and the IPTV transmission network transmits to the IPTV set-top box; the invention improves the distribution efficiency of the emergency message and reduces the operation and maintenance power consumption of the system by utilizing the advantages of large broadcast coverage range, convenient receiving and low detection power consumption of the frequency modulation subcarrier.
The above embodiments further explain the object, technical solution and advantageous effects of the present invention in detail. The above description is only exemplary of the present invention and should not be taken as limiting the scope of the invention, which is intended to cover any modifications, equivalents, improvements, etc. within the spirit and scope of the present invention.

Claims (10)

1. The method for awakening emergency broadcast by subcarrier is characterized by comprising the following steps:
(1) when the IPTV set top box is turned off or is in standby or plays programs, the frequency modulation subcarrier receiving module receives frequency modulation subcarrier broadcasting signals, frequency modulation subcarrier data are obtained through demodulation and decoding, and then the frequency modulation subcarrier decryption and analysis module decrypts and analyzes the frequency modulation subcarrier data to obtain emergency messages;
the frequency modulation subcarrier broadcast is one of FM-SCA broadcast, FM-RDS broadcast, FM-RBDS broadcast and FM-DARC broadcast; the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content;
(2) when the IPTV set-top box plays a program, the IPTV receiving module receives an IPTV broadcast television signal, and video and audio data of the IPTV program are obtained after demodulation, demultiplexing and decoding;
(3) the first control module receives an emergency message, executes an emergency instruction, and wakes up the IPTV set-top box in advance for a necessary time period, wherein the necessary time period refers to the time required by the IPTV set-top box from being woken up to outputting emergency broadcast playing content;
(4) the first control module directly converts the media type of the emergency broadcast content, or controls the output module to convert the media type of the emergency broadcast content after transmitting the emergency broadcast content to the output module;
(5) the first control module enables the output module to carry out synthesis processing on the emergency broadcast content to obtain emergency broadcast playing content;
(6) the first control module controls the output module to output the emergency broadcast playing content to the playing device, wherein the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
2. Method for subcarrier wake-up emergency broadcasting according to claim 1, characterized in that in step (1),
the emergency instruction comprises a target area code, a playing date and time, a synthesizing mode and a playing media type;
the synthesis mode is one of cutting and broadcasting, picture-in-picture and superimposed captions;
the playing media type is one of text, pictures, audio, video, audio and video and streaming media;
the emergency information consists of a text file, a picture file, an audio file, a video-audio file or a streaming media file.
3. Method for subcarrier wake-up emergency broadcasting according to claim 1, characterized in that in step (1),
the IPTV set top box is powered off when the main control module, the IPTV receiving module and the output module are powered off;
the IPTV set top box is in standby state, the main control module is in sleep state, and the IPTV receiving module and the output module are powered off;
the IPTV set-top box plays a program, the main control module sets receiving parameters of the IPTV receiving module, the IPTV receiving module receives IPTV broadcast television signals, and after demodulation, demultiplexing and decoding, the currently played video and audio data of the IPTV program is output by the output module controlled by the main control module;
in step (3), the method for waking up the set top box is as follows:
(a1) if the set-top box is powered off, the first control module enables the output module to be powered on and initialized;
(a2) if the set-top box is in standby state, the first control module enables the output module to be powered on and initialized;
(a3) if the set-top box plays the program, the first control module does not have the awakening operation.
4. The method for waking up emergency broadcast by sub-carrier as claimed in claim 1 or 2, wherein the IPTV set-top box has a unique code, and in step (3), before executing the emergency command, the first control module checks the emergency message, specifically by:
(c1) checking whether the format of the emergency command conforms to a preset format, and if not, returning to the step 1;
(c2) checking whether the target area code of the emergency command is matched with the code of the IPTV set-top box, if not, returning to the step 1;
(c3) checking whether the playing date and time of the emergency instruction is less than the current date and time, if not, returning to the step 1;
(c4) checking whether the format of the emergency information accords with a preset format, and if not, returning to the step 1;
(c5) checking whether the content of the emergency information is legal or not, and if not, returning to the step 1;
the method for checking whether the content of the emergency information is legal is as follows:
(d1) if the emergency information is a text, cutting words, sequentially searching a prestored illegal word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d2) if the emergency information is a picture, firstly, extracting a text from the picture, searching a prestored illegal word library, and if the emergency information is a matched word library, judging the word library to be illegal, and secondly, searching the picture in the prestored illegal picture library, and if the emergency information is a matched word library, judging the word library to be illegal;
(d3) if the emergency information is audio, converting the audio into characters, searching a pre-stored illegal character word library, and if the emergency information is matched, judging that the emergency information is illegal;
(d4) if the emergency information is a video, firstly, framing the video, secondly, extracting characters from the video frame, searching a pre-stored illegal word library, and if the emergency information is a video, judging that the emergency information is illegal, and thirdly, searching the video frame for the pre-stored illegal picture library, and if the emergency information is a video, judging that the emergency information is illegal;
(d5) if the emergency information is video and audio, firstly, checking audio, extracting audio from the video and audio, converting the audio into text, retrieving a prestored illegal word library if the emergency information is matched with the audio, secondly, checking video, extracting video from the video and audio, framing the video, extracting characters from video frames, retrieving the prestored illegal word library if the emergency information is matched with the audio, and then retrieving the video frames from the prestored illegal picture library if the emergency information is matched with the audio;
(d6) if the emergency information is a streaming media, firstly, checking the audio stream, extracting the audio stream from the streaming media, then, converting the audio stream into a text, retrieving a pre-stored illegal word stock, if the emergency information is a streaming media, then, checking the video stream, extracting the video stream from the streaming media, framing the video, then, extracting characters from the video frame, retrieving the pre-stored illegal word stock, if the emergency information is a streaming media, then, retrieving the video frame from the pre-stored illegal picture stock, if the emergency information is a streaming media, then, illegally obtaining the video frame from the video frame.
5. Method for subcarrier wake-up emergency broadcast according to claim 1 or 2,
in the step (4), the media type of the emergency broadcast content is converted into one of text, picture, audio, video, audio and streaming media;
in step (5), the emergency broadcast content is synthesized by:
(b1) if the emergency command is cut-and-broadcast, then: the method comprises the steps of firstly, stopping outputting the IPTV program played currently if the IPTV program is played currently, and secondly, directly replacing emergency broadcast contents;
(b2) if the synthesis mode of the emergency instruction is picture-in-picture, overlapping the emergency broadcast content to the picture-in-picture area of the video picture of the IPTV program which is played currently, and synthesizing a new program video;
(b3) and if the synthesis mode of the emergency command is the caption superposition, superposing the emergency broadcast content to the caption area of the video picture of the IPTV program which is played currently to synthesize a new program video.
6. The IPTV set top box capable of waking up emergency broadcasting by subcarriers according to any one of claims 1 to 5, comprising a frequency modulation subcarrier receiving module, a frequency modulation subcarrier decryption and analysis module, a first control module, a main control module, an IPTV receiving module and an output module;
the frequency modulation subcarrier receiving module is connected with the frequency modulation subcarrier decryption analysis module, receives the frequency modulation subcarrier broadcast signals, demodulates and decodes the frequency modulation subcarrier broadcast signals to obtain frequency modulation subcarrier data, and transmits the frequency modulation subcarrier data to the frequency modulation subcarrier decryption analysis module;
the frequency modulation subcarrier decryption and analysis module is connected with the first control module, decrypts and analyzes frequency modulation subcarrier data to obtain emergency information, and transmits the emergency information to the first control module;
the frequency modulation subcarrier broadcast is one of FM-SCA broadcast, FM-RDS broadcast, FM-RBDS broadcast and FM-DARC broadcast; the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcast content;
the IPTV receiving module receives IPTV broadcast television signals according to receiving parameters set by the main control module, and obtains IPTV programs after demodulation, demultiplexing and decoding;
the first control module is connected with the output module, receives the emergency message, executes the emergency instruction and wakes up the IPTV set-top box in advance for a necessary time period; the necessary time period refers to the time required by the IPTV set top box from being awakened to outputting emergency broadcast playing content;
the main control module is connected with the IPTV receiving module and the output module, and is used for setting receiving parameters of the IPTV receiving module and enabling the output module to output IPTV programs;
the first control module firstly directly converts the media type of the emergency broadcast content, or controls the output module to convert the media type of the emergency broadcast content after the emergency broadcast content is transmitted to the output module, secondly enables the output module to synthesize the emergency broadcast content to obtain the emergency broadcast content, and finally controls the output module to output the emergency broadcast content to the playing equipment;
the playing device is one of a text playing device, a picture playing device, an audio playing device, a video and audio playing device and a streaming media playing device.
7. The IPTV set-top box for waking up emergency broadcasting by subcarriers according to claim 6, further comprising a user response module connecting the main control module and the first control module in response to user operations, wherein under a standby or program playing condition of the IPTV set-top box, the response user operations are shielded before the emergency broadcasting is played, and the response user operations are recovered after the emergency broadcasting is played.
8. The IPTV STB of claim 6, further comprising a peripheral on/off module connected to the first control module for detecting the on/off status of the playback device and controlling the on/off of the playback device, wherein the playback device is turned on before the emergency broadcast is played.
9. The IPTV STB of claim 6, further comprising a storage module connected to the first control module, wherein the storage contents of the storage module include emergency instructions, emergency information, emergency broadcast contents, and emergency broadcast playing contents.
10. The system for awakening emergency broadcast by subcarrier is characterized by comprising an emergency broadcast management platform, a frequency modulation subcarrier transmission network, an IPTV transmission network and an IPTV set top box;
the emergency broadcast management platform generates an emergency message;
the frequency modulation subcarrier transmission network receives the emergency message from the emergency broadcast management platform, performs frequency modulation subcarrier broadcasting and then transmits the emergency message to the IPTV set top box;
the IPTV transmission network receives and transmits IPTV programs to an IPTV set-top box;
the IPTV set top box comprises the IPTV set top box of any one of claims 6 to 9, wherein the IPTV set top box is used for waking up emergency broadcasting by subcarriers;
the frequency modulation subcarrier broadcast is one of FM-SCA broadcast, FM-RDS broadcast, FM-RBDS broadcast and FM-DARC broadcast; the emergency message comprises an emergency instruction and emergency information; the emergency information is emergency broadcast content.
CN202110248100.6A 2021-03-07 2021-03-07 Method for awakening emergency broadcast by subcarrier, IPTV set top box and system Withdrawn CN112954468A (en)

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Application publication date: 20210611