CN114244462A - Multi-mode emergency broadcast terminal capable of receiving FM-CDR - Google Patents

Multi-mode emergency broadcast terminal capable of receiving FM-CDR Download PDF

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Publication number
CN114244462A
CN114244462A CN202111557390.9A CN202111557390A CN114244462A CN 114244462 A CN114244462 A CN 114244462A CN 202111557390 A CN202111557390 A CN 202111557390A CN 114244462 A CN114244462 A CN 114244462A
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module
audio
emergency broadcast
digital
cdr
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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]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Public Health (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

The invention relates to a multimode emergency broadcast terminal capable of receiving FM-CDR, 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 playing content processing module, a digital audio and video output module, a digital-to-analog conversion module, an audio switching module, an analog audio output module and an audio acquisition 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

Multi-mode emergency broadcast terminal capable of receiving FM-CDR
Technical Field
The invention belongs to the technical field of emergency broadcasting, and particularly relates to a multimode emergency broadcasting terminal capable of receiving FM-CDR.
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 capable of receiving FM-CDR 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 playing content processing module, a digital audio and video output module, a digital-to-analog conversion module, an audio switching module, an analog audio output module and an audio acquisition module.
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 message processing module and the digital program buffer area.
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 playing content processing module is connected with the message processing module, the message auxiliary content buffer area, the digital program buffer area, the digital audio and video output module, the digital-to-analog conversion module and the audio acquisition 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, checks digital certificates, eliminates repetition of multi-channel sources, sorts according to response time and response priority, stores and updates the emergency broadcast messages, responds to the emergency broadcast messages with the highest priority, transmits 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 audio switching module to select one path to output to the analog audio output module or the audio acquisition module, and controls the playing content processing module to obtain playing content from the message auxiliary content buffer area or the digital program buffer area or the audio acquisition module.
And the safety module checks the signature for the emergency broadcast message.
The storage module stores emergency broadcast messages.
The playing content processing module acquires playing content from the message auxiliary content buffer area, the digital program buffer area and the audio acquisition module, processes the playing content into playing audio and video data, then transmits the playing audio and video data to the digital audio and video output module, and transmits the playing content to the analog audio output module through the digital-to-analog conversion module and the audio switching module, wherein the processing comprises at least one of decoding, code conversion, text-to-speech, text-to-text and synthesis.
The audio switching module receives program analog audio of analog FM with the same frequency as the CDR from the FM-CDR receiving module, receives the program analog audio of the analog FM of the FM-RDS from the FM-RDS receiving module, and receives analog audio of auxiliary content of the emergency broadcast message from the digital-to-analog conversion module, and three paths are selected, wherein one path is output to the analog audio output module, and the other path is transmitted to the playing content processing module through the audio acquisition module.
And the digital audio and video 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.
And the analog audio output module receives analog audio from the audio switching module and outputs the analog audio through the analog audio interface.
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) The audio switching module receives the program analog audio of the analog FM with the same frequency as the CDR from the FM-CDR receiving module, receives the program analog audio of the analog FM of the FM-RDS from the FM-RDS receiving module, receives the analog audio of the auxiliary content of the emergency broadcast message from the digital-to-analog conversion module, selects one path for output in three paths, realizes the unified processing of the program analog audio of the FM-CDR signal and the FM-RDS signal, and has a simplified structure.
4) The extraction module does not need to extract the audio and video data of the digital programs of all channels in real time. When the currently executed emergency broadcast message is responded and the emergency broadcast message specifies a digital program, the extraction module selects a corresponding channel from channels such as an FM-CDR (frequency modulation-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 information auxiliary content, the digital program comprising FM-CDR and the analog program are supported, and the playing content processing module acquires the playing content from the information auxiliary content buffer area, the digital program buffer area and the audio acquisition module according to the playing content source. 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 capable of receiving FM-CDR 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 playing content processing module 14, a digital audio and video output module 15, a digital-to-analog conversion module 16, an audio switching module 17, an analog audio output module 18 and an audio acquisition 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 message processing module 9 and the digital program buffer area 13.
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 14.
The playing content processing module 14 is connected to the message processing module 9, the message auxiliary content buffer 12, the digital program buffer 13, the digital audio/video output module 15, the digital-to-analog conversion module 16, and the audio acquisition 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 19, and the CDR data comprise CDR emergency broadcast messages and CDR program audio and video data.
The first audio acquisition module 19 receives program analog audio of analog FM having the same frequency as the CDR, and transmits the program analog audio to the first FM program audio data buffer after analog-to-digital conversion.
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 19, and the RDS data comprises RDS emergency broadcast messages.
The second audio acquisition module 19 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.
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 message of each channel from the extraction module 8, matches the address with the emergency broadcast message, checks the digital certificate, removes the duplication from the multi-channel source, the emergency broadcast messages are sorted according to response time and response priority, the emergency broadcast messages are stored and updated, the emergency broadcast messages with the highest priority are responded, the message auxiliary content of the emergency broadcast messages is transmitted to a message auxiliary content buffer area 12, digital program parameters specified by the emergency broadcast messages are transmitted to an extraction module 8, the extraction module 8 is controlled to extract digital program audio and video data from corresponding channels and transmit the digital program audio and video data to a digital program buffer area 13, an audio switching module 17 is controlled to select one channel to output to an analog audio output module 18 or an audio acquisition module 19, and a broadcast content processing module 14 is controlled to acquire broadcast content from the message auxiliary content buffer area 12 or the digital program buffer area 13 or the audio acquisition module 19.
The security module 10 checks the emergency broadcast message.
The storage module 11 stores emergency broadcast messages.
The playing content processing module 14 obtains the playing content from the message auxiliary content buffer 12, the digital program buffer 13 and the audio acquisition module 19, processes the playing content into playing audio and video data, and then transmits the playing audio and video data to the digital audio and video output module 15, and transmits the playing content to the analog audio output module 18 through the digital-to-analog conversion module 16 and the audio switching module 17, wherein the processing includes at least one of decoding, code conversion, text-to-speech, text-to-text and synthesis.
The audio switching module 17 receives the program analog audio of the analog FM with the same frequency as the CDR from the FM-CDR receiving module 1, receives the program analog audio of the analog FM of the FM-RDS from the FM-RDS receiving module 2, and receives the analog audio of the auxiliary content of the emergency broadcast message from the digital-to-analog conversion module 16, and three ways select one way, one way is output to the analog audio output module 18, and the other way is output to the broadcast content processing module 14 through the audio acquisition module 19.
The digital audio/video output module 15 receives the playing audio/video data from the playing content processing module 14, and outputs the playing audio/video data through a digital audio interface or a digital audio/video interface.
The analog audio output module 18 receives analog audio from the audio switching module 17 and outputs the analog audio through an analog audio interface.
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 14 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.
The beneficial effects are 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 audio switching module 17 receives the program analog audio of the analog FM with the same frequency as the CDR from the FM-CDR receiving module 1, receives the program analog audio of the analog FM of the FM-RDS from the FM-RDS receiving module 2, receives the analog audio of the auxiliary content of the emergency broadcast message from the digital-to-analog conversion module 16, selects one path for output in three paths, realizes the unified processing of the program analog audio of the FM-CDR signal and the FM-RDS signal, and has a simplified structure.
4) The extraction module 8 does not need to 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 specifies 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 area 13. This simplifies the processing complexity of the extraction module 8 and reduces the computational overhead of the extraction module 8.
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 14 respectively acquires the broadcast content from the message auxiliary content buffer area 12, the digital program buffer area 13 and the audio acquisition module 19 according to the broadcast content source. The playing content processing module 14 is convenient for receiving the playing content, the system structure is clear, and the function test is convenient.
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 capable of FM-CDR receiving 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 playing content processing module, a digital audio and video output module, a digital-to-analog conversion module, an audio switching module, an analog audio output module and an audio acquisition 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 message processing module and the digital program buffer area, the system comprises a message processing module, a safety module, a storage module, a message auxiliary content buffer area and a playing content processing module, wherein 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 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 corresponding to the emergency broadcast messages, checks the tags of digital certificates, removes the duplication 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 audio switching module to select one path to output to the analog audio output module or the audio acquisition module, and controls the playing content processing module to acquire playing content from the message auxiliary content buffer area or the digital program buffer area or the audio acquisition module;
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 acquires playing content from the message auxiliary content buffer area, the digital program buffer area and the audio acquisition module, processes the playing content into playing audio and video data, and then transmits the playing audio and video data to the digital audio and video output module, and transmits the playing content to the analog audio output module through the digital-to-analog conversion module and the audio switching module, wherein the processing comprises at least one of decoding, code conversion, text-to-speech, text-to-text and synthesis;
the audio switching module receives program analog audio of analog FM with the same frequency as the CDR from the FM-CDR receiving module, receives the program analog audio of the analog FM of the FM-RDS from the FM-RDS receiving module, and receives analog audio of auxiliary content of the emergency broadcast message from the digital-to-analog conversion module;
the digital audio and video 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;
the analog audio output module receives analog audio from the audio switching module and outputs the analog audio through an analog audio interface;
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 FM-CDR-receivable multimode emergency broadcast terminal of 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 multi-mode FM-CDR-receivable emergency broadcast terminal of claim 1, wherein the message processing module communicates the terminal status, the response emergency broadcast message status, back to the emergency broadcast platform via the IP network module.
4. The FM-CDR-receivable multimode emergency broadcast terminal of claim 1, wherein the core of the FM-CDR receiving module is a Hi5216 Hi chip.
5. The FM-CDR-receivable multimode emergency broadcast terminal of claim 1, wherein the core of the security module is a Huada electronics CIU98 chip or a Square cun micro T630 chip.
6. The FM-CDR receivable multimode emergency broadcast terminal of claim 2, wherein the core of the text-to-speech module is a yu-yin day-down SYN6658 chip or a science-university message-fly CSK4002 chip.
CN202111557390.9A 2021-12-21 2021-12-21 Multi-mode emergency broadcast terminal capable of receiving FM-CDR Withdrawn CN114244462A (en)

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