CN112738603A - Method for responding to emergency broadcast by digital frequency modulation, cable television set top box and system - Google Patents

Method for responding to emergency broadcast by digital frequency modulation, cable television set top box and system Download PDF

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Publication number
CN112738603A
CN112738603A CN202110248298.8A CN202110248298A CN112738603A CN 112738603 A CN112738603 A CN 112738603A CN 202110248298 A CN202110248298 A CN 202110248298A CN 112738603 A CN112738603 A CN 112738603A
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emergency
dvb
top box
broadcast
module
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李晓飞
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Hefei Feiguang Miaoyuan Information Technology Co ltd
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Hefei Feiguang Miaoyuan Information Technology Co ltd
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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
    • H04N21/41—Structure of client; Structure of client peripherals
    • H04N21/426—Internal components of the client ; Characteristics thereof
    • H04N21/42607—Internal components of the client ; Characteristics thereof for processing the incoming bitstream
    • 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
    • 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
    • H04N21/43—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
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • H04N21/4355—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream involving reformatting operations of additional data, e.g. HTML pages on a television screen
    • 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
    • H04N21/439—Processing of audio elementary streams
    • H04N21/4398—Processing of audio elementary streams involving reformatting operations of audio signals
    • 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
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
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    • 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
    • H04N21/4432—Powering on the client, e.g. bootstrap loading using setup parameters being stored locally or received from the server
    • 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
    • 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
    • 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
    • H04N21/47—End-user applications
    • H04N21/488—Data services, e.g. news ticker
    • H04N21/4882—Data services, e.g. news ticker for displaying messages, e.g. warnings, reminders
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6112—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving terrestrial transmission, e.g. DVB-T
    • 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]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/61—Network physical structure; Signal processing
    • H04N21/6106—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network
    • H04N21/6143—Network physical structure; Signal processing specially adapted to the downstream path of the transmission network involving transmission via a satellite
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/81—Monomedia components thereof
    • H04N21/8126—Monomedia components thereof involving additional data, e.g. news, sports, stocks, weather forecasts
    • H04N21/814—Monomedia components thereof involving additional data, e.g. news, sports, stocks, weather forecasts comprising emergency warnings

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Emergency Management (AREA)
  • Software Systems (AREA)
  • Business, Economics & Management (AREA)
  • General Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The invention discloses a method for responding to emergency broadcast by digital frequency modulation, a cable television set top box and a system, wherein the method comprises the following steps: the method comprises the steps that an FM-CDR receiving module and an FM-CDR decryption analysis module acquire emergency information from digital frequency modulation broadcast signals, wherein the emergency information comprises emergency instructions and emergency information, and the emergency information is a receiving parameter of emergency broadcast DVB-C programs; the DVB-C receiving module obtains a DVB-C program from a DVB-C broadcast television signal; the main control module for receiving the video and audio data of the DVB-C program receives the emergency message, executes the emergency instruction and awakens the DVB-C set top box in advance by a necessary time period; the main control module sets the receiving parameters of the DVB-C receiving module according to the emergency information, converts the emergency broadcast content into the media type and outputs the media type. The invention detects and receives the emergency message in the digital frequency modulation broadcast signal in real time and wakes up the DVB-C set top box to carry out emergency broadcast.

Description

Method for responding to emergency broadcast by digital frequency modulation, cable television set top box and system
Technical Field
The invention belongs to the technical field of emergency broadcasting, and particularly relates to a method for responding to emergency broadcasting by digital frequency modulation, a cable television set top box and a system.
Background
The cable digital television DVB-C set-top box receives, demodulates, demultiplexes and decodes DVB-C broadcast television signals to obtain broadcast television program data, and outputs the broadcast television program data to a television for playing. And when a natural disaster or a social public event occurs, the emergency broadcast management platform sends an emergency message to the DVB-C set top box. The DVB-C set top box has a problem of how to respond to emergency messages and play emergency broadcasts when it is turned off, on standby or playing programs.
The existing emergency broadcasting system inserts the emergency message into the DVB-C broadcast television signal, and the DVB-C set-top box receives and separates the emergency message, and has the disadvantages that the DVB-C receiving module and the main control module 7 x 24 of the DVB-C set-top box are required to operate in real time, and the DVB-C signal receiving, demodulating and decoding require high-frequency components, and the data volume for processing the DVB-C broadcast television signal is large, so that the power consumption for detecting the emergency message in real time by the DVB-C set-top box is large, and the data processing is complex.
The frequency modulation frequency band digital audio broadcasting (FM-CDR) is a new generation digital broadcasting technology independently developed by China, and two industrial standards of frequency modulation frequency band digital audio broadcasting (FM-CDR) channels and multiplexing with independent intellectual property rights are provided in China in 2013. The FM-CDR adopts high-efficiency audio coding technology, achieves high sound quality under the bandwidth of analog FM broadcast, and can simultaneously transmit texts, images and data. The method has the advantages of good anti-interference performance, high frequency spectrum utilization rate and small transmitting power.
Therefore, based on the existing problems, the invention considers that the FM-CDR broadcast signal is received, demodulated, decoded, decrypted and analyzed by using middle and low frequency components, has low power consumption, small data volume for processing the FM-CDR broadcast signal and low processing complexity, combines the FM-CDR with the DVB-C set top box, and provides a new technical method for solving the problem of how to respond to the emergency message and play the emergency broadcast when the DVB-C set top box is turned off, is in standby or plays programs.
Disclosure of Invention
The invention aims to provide a method for responding to emergency broadcast by digital frequency modulation, a cable television set top box and a system, and aims to solve the problem of how to respond to emergency messages and play the emergency broadcast by a DVB-C set top box.
In order to achieve the purpose, the invention provides the following technical scheme:
a method, cable TV set-top box and system for responding to emergency broadcasts by digital FM, wherein,
in one aspect of the present invention, there is provided a method for responding to an emergency broadcast by digital fm, comprising the steps of:
(1) when the DVB-C set top box is turned off or is in standby or plays programs, the FM-CDR receiving module receives FM-CDR broadcast signals, FM-CDR data are obtained through demodulation and decoding, and then the FM-CDR decryption analysis module decrypts and analyzes the FM-CDR data to obtain emergency messages;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of emergency broadcasting DVB-C programs;
(2) when a DVB-C set top box plays a program, a DVB-C receiving module receives DVB-C broadcast television signals, and video and audio data of the DVB-C program are obtained after demodulation, demultiplexing and decoding;
(3) the main control module receives the emergency message, executes the emergency instruction and wakes up the DVB-C set top box in advance for a necessary time period; the necessary time period refers to the time required by the DVB-C set top box from awakening to outputting the emergency broadcast playing content;
(4) the main control module sets receiving parameters of the DVB-C receiving module according to the emergency information, and the DVB-C receiving module receives DVB-C broadcast television signals, demodulates, demultiplexes and decodes the DVB-C broadcast television signals to obtain emergency broadcast DVB-C program video and audio data serving as emergency broadcast content;
(5) the main control module converts the media type of the emergency broadcast content to obtain the emergency broadcast playing content;
(6) the main control module controls the output module to output the emergency broadcast playing 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.
Further, the emergency instruction comprises a target area code, a playing date and time and a playing media type;
the playing media type is one of text, picture, audio, video and audio and streaming media.
Further, in the step (1),
the DVB-C set top box is powered off, namely the main control module operates at the lower frequency, the DVB-C receiving module and the output module are powered off, and the user response module is powered off;
when the DVB-C set top box is in standby, the main control module operates at a lower frequency, the DVB-C receiving module and the output module are powered off, and the user response module operates;
the DVB-C set top box plays a program, the main control module runs at full frequency, the main control module sets receiving parameters of the DVB-C receiving module, the DVB-C receiving module receives DVB-C broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DVB-C program are output by the main control module control output module;
in step (3), the method for waking up the DVB-C set top box is:
(a1) if the set-top box is shut down, the main control module switches from the low frequency operation to the full frequency operation, and the main control module enables the DVB-C receiving module and the output module to be powered on and initialized;
(a2) if the set-top box is in a standby state, the main control module is switched from the low frequency operation to the full frequency operation, and the main control module enables the DVB-C receiving module and the output module to be powered on and initialized;
(a3) if the set-top box plays the program, the main control module does not have the awakening operation.
Further, the DVB-C set-top box has a unique code, and in step (3), before waking up the DVB-C set-top box, the main control module checks the emergency instruction and the emergency information, 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 instruction is matched with the code of the DVB-C set top box or not, and 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 emergency broadcast DVB-C program receiving parameters, judging whether the emergency information is in a numerical range specified by a DVB-C related standard or not, and if the emergency information is out of the numerical range, judging whether the emergency information is illegal.
Further, in step (5), the media type of the emergency broadcast content is converted from video and audio of an emergency broadcast DVB-C program into one of text, picture, audio, video, audio and video, and streaming media.
In another aspect of the present invention, a cable tv set-top box for responding to emergency broadcasting by digital frequency modulation, namely a DVB-C set-top box, is provided, which comprises an FM-CDR receiving module, an FM-CDR decrypting and parsing module, a main control module, a DVB-C receiving module and an output module;
the FM-CDR receiving module, the FM-CDR decryption analysis module and the main control module run when the DVB-C set top box is turned off, standby and playing programs;
the FM-CDR receiving module is connected with the FM-CDR decryption analysis module, receives the FM-CDR broadcast signals, demodulates and decodes the FM-CDR broadcast signals to obtain FM-CDR data, and transmits the FM-CDR data to the FM-CDR decryption analysis module;
the FM-CDR decryption and analysis module is connected with the main control module, decrypts and analyzes the FM-CDR data to obtain an emergency message, and transmits the emergency message to the main control module;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcasting DVB-C program receiving parameters;
the DVB-C receiving module receives DVB-C broadcast television signals according to receiving parameters set by the main control module, and after demodulation, demultiplexing and decoding, video and audio data of a currently played DVB-C program or video and audio data of an emergency broadcast DVB-C program are obtained and used as emergency broadcast contents;
the main control module is connected with the DVB-C receiving module and the output module, receives the emergency message, executes the emergency instruction, wakes up the DVB-C set top box in advance for a necessary time period, and sets the receiving parameters of the DVB-C receiving module according to the emergency message;
the necessary time period refers to the time required by the DVB-C set top box from awakening to outputting the emergency broadcast playing content;
the main control module firstly converts the media types of the emergency broadcast contents to obtain emergency broadcast contents, and then controls the output module to output the emergency broadcast contents 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.
And further, the system also comprises a user response module which is connected with the main control module to respond to the user operation, and under the condition that the DVB-C set top box is 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.
The emergency broadcast system further comprises a peripheral startup and shutdown module which is connected with the main 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 broadcasting system further comprises a storage module connected with the main control module, and the storage content of the storage module comprises emergency instructions, emergency information, emergency broadcasting content and emergency broadcasting playing content.
In still another aspect of the present invention, there is provided a system for responding to an emergency broadcast by digital frequency modulation, comprising an emergency broadcast management platform, an FM-CDR transmission network, a DVB-C transmission network and a DVB-C set-top box;
the emergency broadcast management platform generates an emergency message;
the FM-CDR transmission network receives the emergency message from the emergency broadcast management platform and then transmits the emergency message to the DVB-C set top box;
the DVB-C transmission network receives and transmits DVB-C programs to the DVB-C set top box;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is the receiving parameters of emergency broadcasting DVB-C programs.
Compared with the prior art, the invention has the following beneficial effects:
1) the FM-CDR receiving module, the FM-CDR decryption analysis module and the first control module receive FM-CDR broadcast signals in real time, detect and receive emergency messages in FM-CDR data, wake up the DVB-C 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 and plays the emergency broadcast content according to the emergency instruction. The invention realizes real-time detection and receiving of the emergency message in the FM-CDR and further awakens the DVB-C set top box for emergency broadcasting.
2) The method for detecting and receiving the emergency message in the FM-CDR by using the FM-CDR receiving module, the FM-CDR decryption analysis module and the first control module in real time relates to a medium and low frequency processing component, has low power consumption, is different from a common DVB-C set top box which receives DVB-C broadcast television signals in real time and detects and receives the emergency message from DVB-C data, relates to a high frequency processing component, and has large power consumption and large data processing amount. 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 DVB-C 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, and the invalid or illegal emergency message is not processed and the DVB-C set top box is not woken up. The invention ensures the safe playing of the DVB-C set top box and avoids misoperation.
4) The first control module receives the emergency message, executes the emergency instruction and wakes up the DVB-C set top box in advance for a necessary time period, wherein the necessary time period refers to the time required by the DVB-C set top box from being woken up to outputting emergency broadcast playing content. The invention realizes time accurate awakening of the DVB-C set top box, and not only the DVB-C set top box is awakened as soon as an emergency message is received to cause white power consumption, but also the DVB-C set top box is awakened just before the emergency broadcast playing time to cause playing delay.
5) When the DVB-C set top box is turned off or is in standby or plays programs, the DVB-C set top box end self-adaptively wakes up the DVB-C set top box, 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, and the emergency broadcast content is converted into the media type in a self-adaptive mode at the DVB-C set top box end to obtain the emergency broadcast playing content. The invention improves the distribution efficiency of the emergency message.
7) Processing the received emergency message, converting the media type of the emergency broadcast content to obtain emergency broadcast playing content, and outputting the emergency broadcast playing content 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 DVB-C set top box, the set top box can only output to a television or a sound box. The invention expands the output mode of emergency broadcasting by the DVB-C set top box 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 DVB-C set top box is in standby or plays programs. Different from the common DVB-C set top box, the emergency broadcasting can be interrupted by the user operation during the emergency broadcasting playing, so that the emergency broadcasting cannot be played completely; the method is also different from the method that the state of the set top box is reported to the emergency broadcast management platform before and after the emergency broadcast is played by the existing DVB-C set top box, and the emergency broadcast management platform remotely controls whether to respond to the user operation or not. 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 DVB-C 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 a cable television set top box which responds to emergency broadcast by digital frequency modulation, and can respond to emergency information from FM-CDR signals and play the emergency broadcast.
11) The invention relates to a system consisting of an emergency broadcast management platform, an FM-CDR transmission network, a DVB-C transmission network and a DVB-C set top box, which realizes a system for enabling the DVB-C set top box to respond to emergency messages from FM-CDR signals and play emergency broadcasts; the invention receives emergency information from FM-CDR signals, the distribution path of emergency broadcast is that an emergency broadcast management platform transmits to an FM-CDR transmission network, the FM-CDR transmission network transmits to a DVB-C set top box with FM-CDR receiving processing, while a general emergency broadcast system using the DVB-C set top box as a terminal receives the emergency information from DVB-C broadcast television signals, the distribution path of emergency broadcast is that the emergency broadcast management platform transmits to the DVB-C transmission network, and the DVB-C transmission network transmits to the DVB-C 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 FM-CDR broadcast coverage range, long signal wavelength, convenient receiving and low detection power consumption.
Drawings
FIG. 1 is a schematic flow chart illustrating a method for responding to emergency broadcast by digital FM according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cable TV set-top box responding to emergency broadcasts by digital FM according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a system for responding to emergency broadcasting by digital fm 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, cable set-top box and system for responding to emergency broadcasts via digital fm, as shown in fig. 1-3, wherein,
in one aspect of this embodiment, a method for responding to an emergency broadcast by digital fm is provided, which includes the steps of:
(1) when the DVB-C set top box 400 is turned off or is in standby or plays programs, the FM-CDR receiving module 1 receives FM-CDR broadcast signals, FM-CDR data are obtained through demodulation and decoding, and then the FM-CDR decryption analysis module 2 decrypts and analyzes the FM-CDR data to obtain emergency messages;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is the receiving parameters of emergency broadcasting DVB-C programs;
(2) when the DVB-C set top box 400 plays a program, the DVB-C receiving module 4 receives DVB-C broadcast television signals, and obtains video and audio data of the DVB-C program after demodulation, demultiplexing and decoding;
(3) the main control module 3 receives the emergency message, executes the emergency instruction, and awakens the DVB-C set top box 400 in advance for a necessary time period; the necessary time period refers to the time required for the DVB-C set-top box 400 to output the emergency broadcast play content from being awakened;
(4) the main control module 3 sets receiving parameters of the DVB-C receiving module 4 according to the emergency information, the DVB-C receiving module 4 receives DVB-C broadcast television signals, and video and audio data of emergency broadcast DVB-C programs are obtained as emergency broadcast contents after demodulation, demultiplexing and decoding;
(5) the main control module 3 converts the media type of the emergency broadcast content to obtain the emergency broadcast playing content;
(6) the main control module 3 controls the output module 5 to output the emergency broadcast playing 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 emergency instruction comprises a target area code, a playing date and time and a playing media type;
the playing media type is one of text, picture, audio, video, audio video and streaming media.
Further, in the step (1),
when the DVB-C set top box 400 is turned off, the main control module 3 operates at a lower frequency, the DVB-C receiving module 4 and the output module 5 are powered off, and the user response module 6 is powered off;
when the DVB-C set top box 400 is in standby, the main control module 3 operates at a low frequency, the DVB-C receiving module 4 and the output module 5 are powered off, and the user response module 6 operates;
the DVB-C set top box 400 plays programs, the main control module 3 runs at full frequency, the main control module 3 sets receiving parameters of the DVB-C receiving module 4, the DVB-C receiving module 4 receives DVB-C broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DVB-C program are output by the main control module 3 to control the output module 5 to output;
in step (3), the method for waking up the DVB-C set top box 400 is:
(a1) if the set-top box is shut down, the main control module 3 is switched from the low frequency operation to the full frequency operation, and the main control module 3 enables the DVB-C receiving module 4 and the output module 5 to be powered on and initialized;
(a2) if the set-top box is in a standby state, the main control module 3 is switched from the low-frequency operation to the full-frequency operation, and the main control module 3 enables the DVB-C receiving module 4 and the output module 5 to be powered on and initialized;
(a3) if the set-top box plays the program, the main control module 3 has no wake-up operation.
Further, the DVB-C set-top box 400 has a unique code, and in step (3), before waking up the DVB-C set-top box 400, the main control module 3 checks the emergency instruction and the emergency information, 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 DVB-C 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 emergency broadcast DVB-C program receiving parameters, judging whether the emergency information is in a numerical range specified by a DVB-C related standard or not, and if the emergency information is out of the numerical range, judging whether the emergency information is illegal.
Further, in step (5), the media type of the emergency broadcast content is converted into one of text, picture, audio, video, audio and streaming media from the emergency broadcast DVB-C program video and audio.
In another aspect of this embodiment, a cable tv set-top box responding to emergency broadcasting by digital frequency modulation, i.e. a DVB-C set-top box 400, is provided, which includes an FM-CDR receiving module 1, an FM-CDR decrypting and parsing module 2, a main control module 3, a DVB-C receiving module 4, and an output module 5;
the system comprises an FM-CDR receiving module 1, an FM-CDR decryption analysis module 2 and a main control module 3, wherein the system runs when the DVB-C set top box 400 is turned off, stands by and plays programs;
the FM-CDR receiving module 1 is connected with the FM-CDR decryption analysis module 2, receives the FM-CDR broadcast signals, demodulates and decodes the FM-CDR broadcast signals to obtain FM-CDR data, and transmits the FM-CDR data to the FM-CDR decryption analysis module 2;
the FM-CDR decryption and analysis module 2 is connected with the main control module 3, decrypts and analyzes the FM-CDR data to obtain an emergency message, and transmits the emergency message to the main control module 3;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcasting DVB-C program receiving parameters;
the DVB-C receiving module 4 receives DVB-C broadcast television signals according to receiving parameters set by the main control module 3, and after demodulation, demultiplexing and decoding, currently played DVB-C program video and audio data or emergency broadcast DVB-C program video and audio data are obtained and used as emergency broadcast contents;
the main control module 3 is connected with the DVB-C receiving module 4 and the output module 5, receives the emergency message, executes the emergency instruction, wakes up the DVB-C set top box 400 in advance for a necessary time period, and sets the receiving parameters of the DVB-C receiving module 4 according to the emergency message;
the necessary time period refers to the time required for the DVB-C set-top box 400 to output the emergency broadcast play content from being awakened;
the main control module 3 firstly converts the media types of the emergency broadcast contents to obtain emergency broadcast contents, and then controls the output module 5 to output the emergency broadcast contents 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.
Further, the digital video broadcasting-based emergency broadcast system further comprises a user response module 6 which is connected with the main control module 3 and responds to user operation, and under the condition that the DVB-C 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 a peripheral startup and shutdown module 7 which is connected with the main 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 system also comprises a storage module 8 connected with the main control module 3, and the storage content of the storage module 8 comprises emergency instructions, emergency information, emergency broadcast content and emergency broadcast playing content.
Further, the core model of the main control module 3 is haisi hi3798MV 200.
In another aspect of this embodiment, a system for responding to emergency broadcasting by digital FM is further provided, which includes an emergency broadcasting management platform 100, an FM-CDR transmission network 200, a DVB-C transmission network 300, and a DVB-C set-top box 400;
the emergency broadcast management platform 100 generates an emergency message;
the FM-CDR transmission network 200 receives the emergency message from the emergency broadcast management platform 100 and then transmits the emergency message to the DVB-C set-top box 400;
a DVB-C transmission network 300 for receiving and transmitting DVB-C programs to a DVB-C set-top box 400;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is the receiving parameters of emergency broadcasting DVB-C programs.
As can be seen from this embodiment, the present invention has the following advantages:
1) the FM-CDR receiving module 1, the FM-CDR decryption and analysis module 2 and the first control module receive FM-CDR broadcast signals in real time, detect and receive emergency messages in FM-CDR data, wake up the DVB-C set top box 400 in time and transmit the emergency instructions and the emergency messages to the main control module 3; the main control module 3 obtains the emergency broadcast content, and converts and plays the emergency broadcast content according to the emergency instruction. The invention realizes real-time detection and receiving of the emergency message in the FM-CDR and further awakens the DVB-C set top box for emergency broadcasting.
2) The FM-CDR receiving module 1, the FM-CDR decryption analysis module 2 and the first control module are used for detecting and receiving the emergency message in the FM-CDR in real time, and the method relates to a medium and low frequency processing component, is low in power consumption, is different from a common DVB-C set top box for receiving DVB-C broadcast television signals in real time and detecting and receiving the emergency message from DVB-C data, relates to a high frequency processing component, and is large in power consumption and large in data processing amount. 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 DVB-C set top box 400, 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, and the invalid or illegal emergency message is not processed and the DVB-C set top box 400 is not woken up. The invention ensures the safe playing of the DVB-C set top box and avoids misoperation.
4) The first control module receives the emergency message, executes the emergency instruction, and wakes up the DVB-C set top box 400 in advance for a necessary time period, wherein the necessary time period refers to the time required by the DVB-C set top box 400 from being woken up to outputting the emergency broadcast playing content. The invention realizes time accurate awakening of the DVB-C set top box, and not only the DVB-C set top box is awakened as soon as an emergency message is received to cause white power consumption, but also the DVB-C set top box is awakened just before the emergency broadcast playing time to cause playing delay.
5) When the DVB-C set top box 400 is turned off or is in standby or plays programs, the DVB-C set top box 400 is awakened by the DVB-C set top box 400 end in a self-adaptive mode, relevant modules awakened in different states are different, only the module awakened for emergency broadcast playing is ensured to be awakened, and the irrelevant 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, and the emergency broadcast content is converted into the media type in a self-adaptive mode at the DVB-C set top box end to obtain the emergency broadcast playing content. The invention improves the distribution efficiency of the emergency message.
7) Processing the received emergency message, converting the media type of the emergency broadcast content to obtain emergency broadcast playing content, and outputting the emergency broadcast playing content 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 DVB-C set top box, the set top box can only output to a television or a sound box. The invention expands the output mode of emergency broadcasting by the DVB-C set top box 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 6 responding to the user operation 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 DVB-C set-top box 400 is standby or plays programs. Different from the common DVB-C set top box, the emergency broadcasting can be interrupted by the user operation during the emergency broadcasting playing, so that the emergency broadcasting cannot be played completely; the method is also different from the method that the state of the set top box is reported to the emergency broadcast management platform before and after the emergency broadcast is played by the existing DVB-C set top box, and the emergency broadcast management platform remotely controls whether to respond to the user operation or not. 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 7 is connected with the main control module 3 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 DVB-C 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 a cable television set-top box which responds to emergency broadcast by digital frequency modulation, and the cable television set-top box can respond to emergency information from FM-CDR signals and play the emergency broadcast.
11) The invention relates to a system consisting of an emergency broadcast management platform 100, an FM-CDR transmission network 200, a DVB-C transmission network 300 and a DVB-C set-top box 400, which realizes a system for enabling the DVB-C set-top box to respond to emergency messages from FM-CDR signals and play emergency broadcasts; the invention receives emergency information from FM-CDR signals, the distribution path of emergency broadcast is that an emergency broadcast management platform transmits to an FM-CDR transmission network, the FM-CDR transmission network transmits to a DVB-C set top box with FM-CDR receiving processing, while a general emergency broadcast system using the DVB-C set top box as a terminal receives the emergency information from DVB-C broadcast television signals, the distribution path of emergency broadcast is that the emergency broadcast management platform transmits to the DVB-C transmission network, and the DVB-C transmission network transmits to the DVB-C 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 FM-CDR broadcast coverage range, long signal wavelength, convenient receiving and low detection power consumption.
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 responding to the emergency broadcast by digital frequency modulation is characterized by comprising the following steps:
(1) when the DVB-C set top box is turned off or is in standby or plays programs, the FM-CDR receiving module receives FM-CDR broadcast signals, FM-CDR data are obtained through demodulation and decoding, and then the FM-CDR decryption analysis module decrypts and analyzes the FM-CDR data to obtain emergency messages;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is a receiving parameter of emergency broadcasting DVB-C programs;
(2) when a DVB-C set top box plays a program, a DVB-C receiving module receives DVB-C broadcast television signals, and video and audio data of the DVB-C program are obtained after demodulation, demultiplexing and decoding;
(3) the main control module receives the emergency message, executes the emergency instruction and wakes up the DVB-C set top box in advance for a necessary time period; the necessary time period refers to the time required by the DVB-C set top box from awakening to outputting the emergency broadcast playing content;
(4) the main control module sets receiving parameters of the DVB-C receiving module according to the emergency information, and the DVB-C receiving module receives DVB-C broadcast television signals, demodulates, demultiplexes and decodes the DVB-C broadcast television signals to obtain emergency broadcast DVB-C program video and audio data serving as emergency broadcast content;
(5) the main control module converts the media type of the emergency broadcast content to obtain the emergency broadcast playing content;
(6) the main control module controls the output module to output the emergency broadcast playing 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.
2. The method of claim 1, wherein the emergency broadcast is a digital FM emergency broadcast,
the emergency instruction comprises a target area code, a playing date and time and a playing media type;
the playing media type is one of text, picture, audio, video and audio and streaming media.
3. The method of responding to emergency broadcasting with digital FM according to claim 1, wherein in step (1),
the DVB-C set top box is powered off, namely the main control module operates at the lower frequency, the DVB-C receiving module and the output module are powered off, and the user response module is powered off;
when the DVB-C set top box is in standby, the main control module operates at a lower frequency, the DVB-C receiving module and the output module are powered off, and the user response module operates;
the DVB-C set top box plays a program, the main control module runs at full frequency, the main control module sets receiving parameters of the DVB-C receiving module, the DVB-C receiving module receives DVB-C broadcast television signals, and after demodulation, demultiplexing and decoding, video and audio data of the currently played DVB-C program are output by the main control module control output module;
in step (3), the method for waking up the DVB-C set top box is:
(a1) if the set-top box is shut down, the main control module switches from the low frequency operation to the full frequency operation, and the main control module enables the DVB-C receiving module and the output module to be powered on and initialized;
(a2) if the set-top box is in a standby state, the main control module is switched from the low frequency operation to the full frequency operation, and the main control module enables the DVB-C receiving module and the output module to be powered on and initialized;
(a3) if the set-top box plays the program, the main control module does not have the awakening operation.
4. The method for responding to emergency broadcasting according to claim 1 or 2, wherein the DVB-C set-top box has a unique code, and in step (3), the main control module checks the emergency command and the emergency information before waking up the DVB-C set-top box, 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 instruction is matched with the code of the DVB-C set top box or not, and 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 emergency broadcast DVB-C program receiving parameters, judging whether the emergency information is in a numerical range specified by a DVB-C related standard or not, and if the emergency information is out of the numerical range, judging whether the emergency information is illegal.
5. A method for responding to an emergency broadcast by digital FM according to claim 1 or 2,
in step (5), the media type of the emergency broadcast content is converted from emergency broadcast DVB-C program video and audio into one of text, picture, audio, video and audio, and streaming media.
6. A cable TV set-top box responding to emergency broadcasting with digital frequency modulation according to any one of claims 1 to 5, comprising an FM-CDR receiving module, an FM-CDR decrypting parsing module, a main control module, a DVB-C receiving module and an output module;
the FM-CDR receiving module, the FM-CDR decryption analysis module and the main control module run when the DVB-C set top box is turned off, standby and playing programs;
the FM-CDR receiving module is connected with the FM-CDR decryption analysis module, receives the FM-CDR broadcast signals, demodulates and decodes the FM-CDR broadcast signals to obtain FM-CDR data, and transmits the FM-CDR data to the FM-CDR decryption analysis module;
the FM-CDR decryption and analysis module is connected with the main control module, decrypts and analyzes the FM-CDR data to obtain an emergency message, and transmits the emergency message to the main control module;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is emergency broadcasting DVB-C program receiving parameters;
the DVB-C receiving module receives DVB-C broadcast television signals according to receiving parameters set by the main control module, and after demodulation, demultiplexing and decoding, video and audio data of a currently played DVB-C program or video and audio data of an emergency broadcast DVB-C program are obtained and used as emergency broadcast contents;
the main control module is connected with the DVB-C receiving module and the output module, receives the emergency message, executes the emergency instruction, wakes up the DVB-C set top box in advance for a necessary time period, and sets the receiving parameters of the DVB-C receiving module according to the emergency message;
the necessary time period refers to the time required by the DVB-C set top box from awakening to outputting the emergency broadcast playing content;
the main control module firstly converts the media types of the emergency broadcast contents to obtain emergency broadcast contents, and then controls the output module to output the emergency broadcast contents 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 set-top box of claim 6, further comprising a user response module coupled to the host module for responding to user actions, wherein the set-top box of DVB-C is configured to mask user actions before the emergency broadcast is broadcast and restore user actions after the emergency broadcast is broadcast, under standby or program-playing conditions.
8. The cable set-top box for responding to emergency broadcast according to claim 6, further comprising a peripheral power on/off module connected to the main control module for detecting the power on/off status of the playback device and controlling the power on/off of the playback device, wherein the playback device is powered on before the emergency broadcast is played.
9. The set-top box of a cable tv set for responding to emergency broadcast according to claim 6, further comprising a storage module connected to the main control module, wherein the storage content of the storage module comprises emergency instructions, emergency information, emergency broadcast content, and emergency broadcast playing content.
10. The system for responding to the emergency broadcast by the digital frequency modulation is characterized by comprising an emergency broadcast management platform, an FM-CDR transmission network, a DVB-C transmission network and a DVB-C set top box;
the emergency broadcast management platform generates an emergency message;
the FM-CDR transmission network receives the emergency message from the emergency broadcast management platform and then transmits the emergency message to the DVB-C set top box;
the DVB-C transmission network receives and transmits DVB-C programs to the DVB-C set top box;
the DVB-C set top box comprising the cable set top box for emergency broadcasting with digital fm response of any of claims 6 to 9;
the emergency message comprises an emergency instruction and emergency information;
the emergency information is the receiving parameters of emergency broadcasting DVB-C programs.
CN202110248298.8A 2021-03-07 2021-03-07 Method for responding to emergency broadcast by digital frequency modulation, cable television set top box and system Withdrawn CN112738603A (en)

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CN202110248298.8A CN112738603A (en) 2021-03-07 2021-03-07 Method for responding to emergency broadcast by digital frequency modulation, cable television set top box and system

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