CN114205025A - Multimode emergency broadcast terminal with FM-CDR receiving function - Google Patents

Multimode emergency broadcast terminal with FM-CDR receiving function Download PDF

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Publication number
CN114205025A
CN114205025A CN202111568787.8A CN202111568787A CN114205025A CN 114205025 A CN114205025 A CN 114205025A CN 202111568787 A CN202111568787 A CN 202111568787A CN 114205025 A CN114205025 A CN 114205025A
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China
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module
program
audio
emergency broadcast
digital
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CN202111568787.8A
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Chinese (zh)
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王大伟
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Lu'an Lutuo Information Technology Co ltd
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Lu'an Lutuo Information Technology Co ltd
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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
    • H04L63/0823—Network architectures or network communication protocols for network security for authentication of entities using certificates
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]

Abstract

The invention relates to a multimode emergency broadcast terminal with FM-CDR reception, which comprises an FM-CDR receiving module, an FM-RDS receiving module, a DVB-C receiving module, a DTMB receiving module, a DVB-S receiving module, a digital medium wave receiving module, an IP network module, an extraction module, a message processing module, a safety module, a storage module, a message auxiliary content buffer area, a digital program buffer area, a first audio acquisition module, a second audio acquisition module, a first FM program audio data buffer area, a second FM program audio data buffer area, a playing content processing module and an output module. The invention simultaneously supports signal channels such as FM-CDR and the like to receive emergency broadcast messages, and improves the channel disaster resistance of the terminal.

Description

Multimode emergency broadcast terminal with FM-CDR receiving function
Technical Field
The invention belongs to the technical field of emergency broadcasting, and particularly relates to a multimode emergency broadcasting terminal with FM-CDR (frequency modulation-CDR) receiving function.
Background
The emergency broadcast system consists of an emergency broadcast platform, an adapter, a transmission coverage system and an emergency broadcast terminal, wherein the emergency broadcast platform transmits emergency broadcast messages to the emergency broadcast terminal for playing through the adapter and the transmission coverage system. The emergency broadcast message includes an emergency broadcast instruction and emergency broadcast content. Emergency broadcast content is message incidental content (text, audio-video) or parameters specifying a broadcast television program.
The emergency broadcast terminal is a component of an emergency broadcast system, is a key point for solving the problem of 'the last kilometer' of emergency broadcast, and plays an important role in timely transmitting politics, releasing information, guiding public opinion, stabilizing mind, assisting disaster relief and the like. The current broadcast television transmission coverage modes include analog frequency modulation with subcarrier (FM-RDS), digital frequency modulation (FM-CDR), digital cable television (DVB-C), digital terrestrial radio television (DTMB), digital satellite television (DVB-S), digital medium wave, and wired or wireless network (IP). In particular, FM-CDRs are typically co-frequency transmitted with analog FM.
However, the current emergency broadcast terminal has few receiving channels and poor disaster tolerance, and in an emergency situation where only a few channel signals are interrupted, the emergency broadcast terminal loses the capability of emergency broadcast in an emergency situation, and it may be the time when the emergency broadcast terminal plays a critical role. How to make an emergency broadcast terminal fully compatible with all existing broadcast television transmission coverage network systems and improve the channel disaster resistance of the emergency broadcast terminal is a technical problem to be solved.
Disclosure of Invention
The invention aims to solve the technical problem of poor disaster resistance of an emergency broadcast terminal channel.
In order to solve the technical problems, the invention adopts the following technical scheme:
a multimode emergency broadcast terminal with FM-CDR receiving function comprises an FM-CDR receiving module, an FM-RDS receiving module, a DVB-C receiving module, a DTMB receiving module, a DVB-S receiving module, a digital medium wave receiving module, an IP network module, an extracting module, a message processing module, a safety module, a storage module, a message auxiliary content buffer area, a digital program buffer area, a first audio acquisition module, a second audio acquisition module, a first FM program audio data buffer area, a second FM program audio data buffer area, a playing content processing module and an output module.
Wherein the extraction module is connected with the FM-CDR receiving module, the FM-RDS receiving module, the DVB-C receiving module, the DTMB receiving module, the DVB-S receiving module, the digital medium wave receiving module, the IP network module, the digital program buffer area and the message processing module.
The message processing module is connected with the extraction module, the safety module, the storage module, the message auxiliary content buffer area and the playing content processing module.
The broadcast content processing module is connected with the message processing module, the emergency content data buffer area, the digital program buffer area, the first FM program audio data buffer area, the second FM program audio data buffer area and the output module.
The FM-CDR receiving module receives FM-CDR signals, demodulates the FM-CDR signals to obtain CDR data and then transmits the CDR data to the extracting module, demodulates the CDR data to obtain program analog audio frequency of analog FM with the same frequency as the CDR and then transmits the program analog audio frequency to the first audio frequency collecting module, and the CDR data comprise CDR emergency broadcast messages and CDR program audio and video data.
The first audio acquisition module receives program analog audio of analog FM with the same frequency as the CDR, and transmits the program analog audio to a first FM program audio data buffer area after analog-to-digital conversion.
The FM-RDS receiving module receives FM-RDS signals, RDS data are obtained through demodulation and then transmitted to the extraction module, program analog audio of analog FM of FM-RDS is obtained through demodulation and then transmitted to the second audio acquisition module, and the RDS data comprise RDS emergency broadcast messages.
The second audio acquisition module receives the program analog audio of the analog FM of FM-RDS, and transmits the program analog audio to the second FM program audio data buffer area after analog-to-digital conversion.
The DVB-C receiving module receives DVB-C signals, demodulates the DVB-C signals to obtain DVB-C transmission streams and transmits the DVB-C transmission streams to the extracting module, wherein the DVB-C transmission streams comprise DVB-C emergency broadcast messages and DVB-C program audio and video data.
The DTMB receiving module receives the DTMB signals, demodulates the DTMB signals to obtain DTMB transmission streams and transmits the DTMB transmission streams to the extracting module, and the DTMB transmission streams comprise DTMB emergency broadcast messages and DTMB program audio and video data.
The DVB-S receiving module receives DVB-S signals, demodulates the DVB-S signals to obtain DVB-S transmission streams and transmits the DVB-S transmission streams to the extracting module, wherein the DVB-S transmission streams comprise DVB-S emergency broadcast messages and DVB-S program audio and video data.
The digital medium wave receiving module receives a digital medium wave signal, demodulates the digital medium wave signal to obtain a digital medium wave transmission stream and transmits the digital medium wave transmission stream to the extracting module, and the digital medium wave transmission stream comprises a digital medium wave emergency broadcast message and digital medium wave program audio and video data.
The IP network module receives IP network data of a 3G, 4G, 5G, 6G or wired network and then transmits the IP network data to the extraction module, wherein the IP network data comprises IP network emergency broadcast messages and IP network program audio and video data.
The extraction module extracts the emergency broadcast information of each channel from the data transmitted by each receiving module and transmits the emergency broadcast information to the information processing module, and extracts the digital program audio and video data from the corresponding channel according to the digital program parameters appointed by the emergency broadcast information and transmits the digital program audio and video data to the digital program buffer area.
The message processing module receives the emergency broadcast messages of all channels from the extraction module, matches addresses and digital certificate labels with the emergency broadcast messages, removes the repetition of multi-channel sources, sorts the emergency broadcast messages according to response time and the response priority, stores and updates the emergency broadcast messages, responds to the emergency broadcast messages with the highest priority, transmits the message auxiliary content of the emergency broadcast messages to a message auxiliary content buffer area, sends digital program parameters specified by the emergency broadcast messages to the extraction module, controls the extraction module to extract digital program audio and video data from the corresponding channels and then transmits the digital program audio and video data to the digital program buffer area, controls the first audio acquisition module to acquire program analog audio of analog FM with the same frequency as CDR and transmit the program analog audio to the first FM program audio data buffer area, controls the second audio acquisition module to acquire program analog audio of FM-RDS analog FM and transmit the program analog audio to the second FM program audio data buffer area, and controlling the playing content processing module to receive playing content from the message auxiliary content buffer or the digital program buffer or the first FM program audio data buffer or the second FM program audio data buffer.
And the safety module checks the signature for the emergency broadcast message.
The storage module stores emergency broadcast messages.
The playing content processing module receives playing content from the message auxiliary content buffer area or the digital program buffer area or the first FM program audio data buffer area or the second FM program audio data buffer area under the control of the message processing module, processes the playing content into playing audio and video data and transmits the playing audio and video data to the output module, and the processing comprises at least one of decoding, code conversion, text to speech and synthesis.
The output module receives the played audio and video data from the played content processing module and outputs the played audio and video data through a digital audio interface or a digital audio and video interface, or outputs the played audio data through an analog audio interface after digital-to-analog conversion.
Each receiving module comprises an FM-CDR receiving module, an FM-RDS receiving module, a DVB-C receiving module, a DTMB receiving module, a DVB-S receiving module, a digital medium wave receiving module and an IP network module, and each quantity is at least one.
The emergency broadcast messages of each channel comprise CDR emergency broadcast messages, RDS emergency broadcast messages, DVB-C emergency broadcast messages, DTMB emergency broadcast messages, DVB-S emergency broadcast messages, digital medium wave emergency broadcast messages and IP network emergency broadcast messages.
And the text-to-speech module is connected with the message processing module or the playing content processing module and is used for performing text conversion on the playing content to obtain speech and audio.
Further, the message processing module transmits the terminal state and the condition of responding to the emergency broadcast message back to the emergency broadcast platform through the IP network module.
Further, the core of the FM-CDR receiving module is a hel Hi5216 chip.
Further, the core of the security module is a Huada electronic CIU98 chip or a square inch micro T630 chip.
Furthermore, the core of the text-to-speech module is a SYNs 6658 chip under the heaven of astronomy or a CSK4002 chip of science news.
Compared with the prior art, the invention has the beneficial effects that:
1) meanwhile, the emergency broadcast terminal supports various signal channels of digital frequency modulation FM-CDR, analog frequency modulation with subcarriers, cable digital television, ground wireless digital television, satellite digital television, digital medium wave, cable or wireless network to receive emergency broadcast messages, and can still receive the emergency broadcast messages through other channels to carry out emergency broadcast playing under the condition that signals of partial channels are interrupted, so that the channel disaster resistance of the emergency broadcast terminal is improved.
2) The method can be used for uniformly processing CDR emergency broadcast messages, RDS emergency broadcast messages, DVB-C emergency broadcast messages, DTMB emergency broadcast messages, DVB-S emergency broadcast messages, digital medium wave emergency broadcast messages and IP network emergency broadcast messages, and comprises the steps of matching addresses, checking digital certificates, removing duplication of multi-channel sources, sorting according to response time, sorting according to response priority, storing and updating emergency broadcast messages and responding to the emergency broadcast messages with the highest priority.
3) Program analog audios of analog FM with the same frequency as CDR demodulated by an FM-CDR receiving module are digitized by a first audio acquisition module and then transmitted into a first FM program audio data buffer area, and program analog audios of analog FM of FM-RDS demodulated by an FM-RDS receiving module are digitized by a second audio acquisition module and then transmitted into a second FM program audio data buffer area, so that unified digital processing of multichannel signals such as FM-CDR signals is realized, analog components are reduced, the structure is simplified, interference resistance is realized, and the quality of output signals is improved.
4) The extraction module does not extract the audio and video data of the digital program of each channel in real time. When the currently executed emergency broadcast message is responded and the emergency broadcast message comprises the digital program, the extraction module selects a corresponding channel from channels such as FM-CDR and the like, extracts audio and video data of the digital program and then transmits the audio and video data to the digital program buffer area. This simplifies the processing complexity of the extraction module and reduces the computational overhead of the extraction module.
5) The emergency broadcast message auxiliary content, the digital program comprising the FM-CDR and the analog program are supported, and the broadcast content processing module receives broadcast contents from the message auxiliary content buffer area, the digital program buffer area, the first FM program audio data buffer area and the second FM program audio data buffer area respectively. The playing content processing module is convenient to receive playing content, the system structure is clear, and the function test is convenient.
Drawings
FIG. 1 is a schematic block diagram of the architecture of one embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings and examples.
An embodiment of the present invention is shown in fig. 1. A multimode emergency broadcast terminal with FM-CDR reception comprises an FM-CDR receiving module 1, an FM-RDS receiving module 2, a DVB-C receiving module 3, a DTMB receiving module 4, a DVB-S receiving module 5, a digital medium wave receiving module 6, an IP network module 7, an extraction module 8, a message processing module 9, a safety module 10, a storage module 11, a message auxiliary content buffer area 12, a digital program buffer area 13, a first audio acquisition module 14, a second audio acquisition module 15, a first FM program audio data buffer area 16, a second FM program audio data buffer area 17, a playing content processing module 18 and an output module 19.
The extraction module 8 is connected with the FM-CDR receiving module 1, the FM-RDS receiving module 2, the DVB-C receiving module 3, the DTMB receiving module 4, the DVB-S receiving module 5, the digital medium wave receiving module 6, the IP network module 7, the digital program buffer area 13 and the message processing module 9.
The message processing module 9 is connected with the extraction module 8, the security module 10, the storage module 11, the message auxiliary content buffer 12 and the playing content processing module 18.
The playing content processing module 18 is connected to the message processing module 9, the emergency content data buffer, the digital program buffer 13, the first FM program audio data buffer 16, the second FM program audio data buffer 17, and the output module 19.
The FM-CDR receiving module 1 receives FM-CDR signals, demodulates the FM-CDR signals to obtain CDR data and then transmits the CDR data to the extracting module 8, demodulates the CDR data to obtain program analog audio frequency of analog FM with the same frequency as that of CDR and then transmits the program analog audio frequency to the first audio frequency collecting module 14, and the CDR data comprises CDR emergency broadcast information and CDR program audio and video data.
The first audio acquisition module 14 receives program analog audio of an analog FM having the same frequency as the CDR, and after analog-to-digital conversion, transmits the program analog audio to the first FM program audio data buffer 16.
The FM-RDS receiving module 2 receives FM-RDS signals, demodulates the FM-RDS signals to obtain RDS data and then transmits the RDS data to the extracting module 8, demodulates the FM-RDS program analog audio of analog FM and then transmits the program analog audio to the second audio acquisition module 15, and the RDS data comprises RDS emergency broadcast messages.
The second audio acquisition module 15 receives the program analog audio of the analog FM of FM-RDS, and after analog-to-digital conversion, transmits the program analog audio to the second FM program audio data buffer 17.
The DVB-C receiving module 3 receives DVB-C signals, demodulates the DVB-C signals to obtain DVB-C transmission streams and transmits the DVB-C transmission streams to the extracting module 8, wherein the DVB-C transmission streams comprise DVB-C emergency broadcast messages and DVB-C program audio and video data.
The DTMB receiving module 4 receives the DTMB signals, demodulates the DTMB signals to obtain DTMB transmission streams and transmits the DTMB transmission streams to the extracting module 8, and the DTMB transmission streams comprise DTMB emergency broadcast messages and DTMB program audio and video data.
The DVB-S receiving module 5 receives DVB-S signals, demodulates the DVB-S signals to obtain DVB-S transmission streams and transmits the DVB-S transmission streams to the extracting module 8, wherein the DVB-S transmission streams comprise DVB-S emergency broadcast messages and DVB-S program audio and video data.
The digital medium wave receiving module 6 receives a digital medium wave signal, demodulates the digital medium wave signal to obtain a digital medium wave transmission stream, and transmits the digital medium wave transmission stream to the extracting module 8, wherein the digital medium wave transmission stream comprises a digital medium wave emergency broadcast message and digital medium wave program audio and video data.
The IP network module 7 receives IP network data of 3G, 4G, 5G, 6G or a wired network and then transmits the IP network data to the extraction module 8, wherein the IP network data comprises IP network emergency broadcast information and IP network program audio and video data.
The extraction module 8 extracts the emergency broadcast message of each channel from the data transmitted from each receiving module and transmits the emergency broadcast message to the message processing module 9, and extracts the audio and video data of the digital program from the corresponding channel and transmits the audio and video data of the digital program to the digital program buffer 13 according to the digital program parameters specified by the emergency broadcast message.
The message processing module 9 receives the emergency broadcast messages of each channel from the extraction module 8, matches addresses corresponding to the emergency broadcast messages, checks the digital certificate, removes the repetition of the multi-channel source, sorts according to the response time and the response priority, stores and updates the emergency broadcast messages, responds to the emergency broadcast messages with the highest priority, transmits the message auxiliary content of the emergency broadcast messages to the message auxiliary content buffer area 12, sends the digital program parameters specified by the emergency broadcast messages to the extraction module 8, controls the extraction module 8 to extract the digital program audio and video data from the corresponding channels and then transmits the digital program audio and video data to the digital program buffer area 13, controls the first audio acquisition module 14 to acquire the program analog audio frequency of the analog FM with the same frequency as the CDR and transmit the program analog audio frequency to the first FM program audio data buffer area 16, controls the second audio acquisition module 15 to acquire the program analog audio frequency of the FM-RDS analog FM and transmit the program analog audio frequency to the second FM program audio data buffer area 17, the control play content processing module 18 receives play content from the message auxiliary content buffer 12 or the digital program buffer 13 or the first FM program audio data buffer 16 or the second FM program audio data buffer 17.
The security module 10 checks the emergency broadcast message.
The storage module 11 stores emergency broadcast messages.
The playing content processing module 18 receives the playing content from the message auxiliary content buffer 12 or the digital program buffer 13 or the first FM program audio data buffer 16 or the second FM program audio data buffer 17 under the control of the message processing module 9, processes the playing content into playing audio and video data, and transmits the playing audio and video data to the output module 19, wherein the processing includes at least one of decoding, encoding conversion, text-to-speech and synthesis.
The output module 19 receives the playing audio and video data from the playing content processing module 18, and outputs the playing audio and video data through a digital audio interface or a digital audio and video interface, or outputs the playing audio data through an analog audio interface after performing digital-to-analog conversion.
The receiving modules comprise an FM-CDR receiving module 1, an FM-RDS receiving module 2, a DVB-C receiving module 3, a DTMB receiving module 4, a DVB-S receiving module 5, a digital medium wave receiving module 6 and an IP network module 7, and each quantity is at least one.
The emergency broadcast messages of each channel comprise CDR emergency broadcast messages, RDS emergency broadcast messages, DVB-C emergency broadcast messages, DTMB emergency broadcast messages, DVB-S emergency broadcast messages, digital medium wave emergency broadcast messages and IP network emergency broadcast messages.
Further, the system also comprises a text-to-speech module 20, which is connected with the message processing module 9 or the playing content processing module 18 and performs text-to-speech audio on the playing content.
Further, the message processing module 9 transmits the terminal status and the emergency broadcast message response back to the emergency broadcast platform through the IP network module 7.
Further, the core of the FM-CDR receiving module 1 is a hel Hi5216 chip.
Further, the core of the security module 10 is a huada electronic CIU98 chip or a square inch micro T630 chip.
Further, the core of the text-to-speech module 20 is a SYNs 6658 chip under the heaven of astronomy or a CSK4002 chip of science news.
Compared with the prior art, the invention has the beneficial effects that:
1) meanwhile, the emergency broadcast terminal supports various signal channels of digital frequency modulation FM-CDR, analog frequency modulation with subcarriers, cable digital television, ground wireless digital television, satellite digital television, digital medium wave, cable or wireless network to receive emergency broadcast messages, and can still receive the emergency broadcast messages through other channels to carry out emergency broadcast playing under the condition that signals of partial channels are interrupted, so that the channel disaster resistance of the emergency broadcast terminal is improved.
2) The method can be used for uniformly processing CDR emergency broadcast messages, RDS emergency broadcast messages, DVB-C emergency broadcast messages, DTMB emergency broadcast messages, DVB-S emergency broadcast messages, digital medium wave emergency broadcast messages and IP network emergency broadcast messages, and comprises the steps of matching addresses, checking digital certificates, removing duplication of multi-channel sources, sorting according to response time, sorting according to response priority, storing and updating emergency broadcast messages and responding to the emergency broadcast messages with the highest priority.
3) The program analog audio in each receiving channel is subjected to digital processing, the program analog audio of the analog FM with the same frequency as the CDR demodulated by the FM-CDR receiving module 1 is digitized by the first audio acquisition module 14 and then transmitted into the first FM program audio data buffer area 16, the program analog audio of the FM-RDS analog FM demodulated by the FM-RDS receiving module 2 is digitized by the second audio acquisition module 15 and then transmitted into the second FM program audio data buffer area 17, so that the unified digital processing of multichannel signals such as FM-CDR signals and the like is realized, the analog components are reduced, the structure is simplified, the interference resistance is realized, and the quality of output signals is improved.
4) The extraction module 8 does not extract the digital program audio/video data of each channel in real time. When the currently executed emergency broadcast message is responded and the emergency broadcast message includes a digital program, the extraction module 8 selects a corresponding channel from channels such as FM-CDR and then extracts digital program audio and video data and then transfers the digital program audio and video data to the digital program buffer 13. This simplifies the processing complexity of the extraction module 8 and reduces the computational overhead of the extraction module 8.
5) Supporting three broadcast content sources of emergency broadcast message auxiliary content, digital program including FM-CDR and analog program, the broadcast content processing module 18 receives the broadcast content from the message auxiliary content buffer 12, the digital program buffer 13, the first FM program audio data buffer 16 and the second FM program audio data buffer 17 respectively. The playing content processing module 18 is convenient for receiving playing content, has clear system structure and is convenient for function test.
The present invention has been described in terms of embodiments, and it will be appreciated that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the scope and spirit of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification (including any accompanying claims, abstract and drawings), may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Claims (6)

1. A multimode emergency broadcast terminal with FM-CDR reception is characterized by comprising an FM-CDR receiving module, an FM-RDS receiving module, a DVB-C receiving module, a DTMB receiving module, a DVB-S receiving module, a digital medium wave receiving module, an IP network module, an extraction module, a message processing module, a safety module, a storage module, a message auxiliary content buffer area, a digital program buffer area, a first audio acquisition module, a second audio acquisition module, a first FM program audio data buffer area, a second FM program audio data buffer area, a playing content processing module and an output module, wherein the extraction module is connected with the FM-CDR receiving module, the FM-RDS receiving module, the DVB-C receiving module, the DTMB receiving module, the DVB-S receiving module, the digital medium wave receiving module, the IP network module, the digital broadcast terminal and the output module, The system comprises a digital program buffer area and a message processing module, wherein the message processing module is connected with an extraction module, a safety module, a storage module, a message auxiliary content buffer area and a play content processing module, and the play content processing module is connected with the message processing module, an emergency content data buffer area, the digital program buffer area, a first FM program audio data buffer area, a second FM program audio data buffer area and an output module;
the FM-CDR receiving module receives FM-CDR signals, demodulates the FM-CDR signals to obtain CDR data and then transmits the CDR data to the extracting module, demodulates the CDR data to obtain program analog audio frequency of analog FM with the same frequency as the CDR and then transmits the program analog audio frequency to the first audio frequency acquisition module, wherein the CDR data comprises CDR emergency broadcast information and CDR program audio and video data;
the first audio acquisition module receives program analog audio of analog FM with the same frequency as the CDR, and transmits the program analog audio to a first FM program audio data buffer area after analog-to-digital conversion;
the FM-RDS receiving module receives FM-RDS signals, demodulates the FM-RDS signals to obtain RDS data and then transmits the RDS data to the extracting module, demodulates the program analog audio of the analog FM of the FM-RDS and then transmits the program analog audio to the second audio acquisition module, and the RDS data comprises RDS emergency broadcast messages;
the second audio acquisition module receives the program analog audio of the analog FM of the FM-RDS, and transmits the program analog audio to the second FM program audio data buffer area after analog-to-digital conversion;
the DVB-C receiving module receives DVB-C signals, demodulates the DVB-C signals to obtain DVB-C transmission streams and transmits the DVB-C transmission streams to the extracting module, wherein the DVB-C transmission streams comprise DVB-C emergency broadcast messages and DVB-C program audio and video data;
the DTMB receiving module receives DTMB signals, demodulates the DTMB signals to obtain DTMB transport streams and transmits the DTMB transport streams to the extracting module, and the DTMB transport streams comprise DTMB emergency broadcast messages and DTMB program audio and video data;
the DVB-S receiving module receives DVB-S signals, demodulates the DVB-S signals to obtain DVB-S transmission streams and transmits the DVB-S transmission streams to the extracting module, wherein the DVB-S transmission streams comprise DVB-S emergency broadcast messages and DVB-S program audio and video data;
the digital medium wave receiving module receives a digital medium wave signal, demodulates the digital medium wave signal to obtain a digital medium wave transmission stream and transmits the digital medium wave transmission stream to the extracting module, wherein the digital medium wave transmission stream comprises a digital medium wave emergency broadcast message and digital medium wave program audio and video data;
the IP network module receives IP network data of a 3G, 4G, 5G, 6G or wired network and then transmits the IP network data to the extraction module, wherein the IP network data comprises IP network emergency broadcast messages and IP network program audio and video data;
the extraction module extracts the emergency broadcast message of each channel from the data transmitted by each receiving module and transmits the emergency broadcast message to the message processing module, and extracts the digital program audio and video data from the corresponding channel according to the digital program parameters specified by the emergency broadcast message and transmits the digital program audio and video data to the digital program buffer area;
the message processing module receives the emergency broadcast messages of all channels from the extraction module, matches addresses and digital certificate labels with the emergency broadcast messages, removes the repetition of multi-channel sources, sorts the emergency broadcast messages according to response time and the response priority, stores and updates the emergency broadcast messages, responds to the emergency broadcast messages with the highest priority, transmits the message auxiliary content of the emergency broadcast messages to a message auxiliary content buffer area, sends digital program parameters specified by the emergency broadcast messages to the extraction module, controls the extraction module to extract digital program audio and video data from the corresponding channels and then transmits the digital program audio and video data to the digital program buffer area, controls the first audio acquisition module to acquire program analog audio of analog FM with the same frequency as CDR and transmit the program analog audio to the first FM program audio data buffer area, controls the second audio acquisition module to acquire program analog audio of FM-RDS analog FM and transmit the program analog audio to the second FM program audio data buffer area, controlling a playing content processing module to receive playing content from a message auxiliary content buffer area or a digital program buffer area or a first FM program audio data buffer area or a second FM program audio data buffer area;
the safety module checks the signature corresponding to the emergency broadcast message;
the storage module is used for storing emergency broadcast messages;
the playing content processing module receives playing content from the message auxiliary content buffer area or the digital program buffer area or the first FM program audio data buffer area or the second FM program audio data buffer area under the control of the message processing module, processes the playing content into playing audio and video data and transmits the playing audio and video data to the output module, wherein the processing comprises at least one of decoding, code conversion, text to speech and synthesis;
the output module receives the played audio and video data from the played content processing module and outputs the played audio and video data through a digital audio interface or a digital audio and video interface, or outputs the played audio data through an analog audio interface after digital-to-analog conversion;
each receiving module comprises an FM-CDR receiving module, an FM-RDS receiving module, a DVB-C receiving module, a DTMB receiving module, a DVB-S receiving module, a digital medium wave receiving module and an IP network module, and each quantity is at least one;
the emergency broadcast messages of each channel comprise CDR emergency broadcast messages, RDS emergency broadcast messages, DVB-C emergency broadcast messages, DTMB emergency broadcast messages, DVB-S emergency broadcast messages, digital medium wave emergency broadcast messages and IP network emergency broadcast messages.
2. The multimode emergency broadcast terminal with FM-CDR reception as claimed in claim 1, further comprising a text-to-speech module, connected to the message processing module or the broadcast content processing module, for performing text-to-speech audio on the broadcast content.
3. The multimode emergency broadcast terminal with FM-CDR reception as recited in claim 1, wherein the message processing module returns the terminal status, the response emergency broadcast message status, to the emergency broadcast platform via the IP network module.
4. The multimode emergency broadcast terminal with FM-CDR reception as recited in claim 1, wherein the core of said FM-CDR reception module is a hail Hi5216 chip.
5. The multimode emergency broadcast terminal with FM-CDR reception as recited in claim 1, wherein the core of the security module is a huada electronic CIU98 chip or a cun micro T630 chip.
6. The multimode emergency broadcast terminal with FM-CDR reception of claim 2, wherein the core of the text-to-speech module is a SYNs 6658 chip under astronomy heaven or a CSK4002 chip in scientific news.
CN202111568787.8A 2021-12-21 2021-12-21 Multimode emergency broadcast terminal with FM-CDR receiving function Withdrawn CN114205025A (en)

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Application publication date: 20220318