CN114205038A - 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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CN114205038A
CN114205038A CN202111569092.1A CN202111569092A CN114205038A CN 114205038 A CN114205038 A CN 114205038A CN 202111569092 A CN202111569092 A CN 202111569092A CN 114205038 A CN114205038 A CN 114205038A
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module
audio
emergency broadcast
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dvb
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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 containing 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, a main control module, a safety module, a storage module, a digital-to-analog conversion module, an audio switching module, an analog audio output module, an audio acquisition module and an output module. The invention simultaneously supports various signal channels of digital frequency modulation FM-CDR, FM-RDS, DVB-C, DTMB, DVB-S, digital medium wave and IP network to receive and process emergency broadcast messages, and can still receive emergency broadcast messages through other channels to carry out emergency broadcast playing under the condition that partial channel signals are interrupted, thereby improving the channel disaster resistance of the emergency broadcast 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 receiving.
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 (FM), 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 resistance, 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 reception, comprising: the device 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, a main control module, a safety module, a storage module, a digital-to-analog conversion module, an audio switching module, an analog audio output module, an audio acquisition module and a digital audio and video output module.
The main control module is connected with the FM-CDR receiving module, the first FM program audio acquisition module, the FM-RDS receiving module, the second FM program audio acquisition 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 safety module, the storage module, the digital-to-analog conversion module, the audio acquisition module and the digital audio and video output module.
The audio switching module is connected with the FM-CDR receiving module, the FM-RDS receiving module, the digital-to-analog conversion module, the analog audio output module and the audio acquisition module.
The FM-CDR receiving module receives FM-CDR signals, demodulates the FM-CDR signals to obtain CDR program audio and video data and CDR emergency broadcast messages and then transmits the CDR program audio and video data and CDR emergency broadcast messages to the main control module, and demodulates the CDR program analog audio and video data to obtain analog FM program analog audio with the same frequency as the CDR and then transmits the analog FM program analog audio and video data and CDR emergency broadcast messages to the audio switching module.
The FM-RDS receiving module receives FM-RDS signals, demodulates the FM-RDS signals to obtain RDS emergency broadcast messages and then transmits the RDS emergency broadcast messages to the main control module, and demodulates the RDS emergency broadcast messages to obtain FM program analog audio of analog FM of the FM-RDS and then transmits the FM program analog audio to the audio switching module.
The DVB-C receiving module receives DVB-C signals and demodulates the DVB-C signals to obtain DVB-C transmission streams, and the DVB-C transmission streams comprise DVB-C emergency broadcast messages and DVB-C program audio and video data and transmit the DVB-C emergency broadcast messages and the DVB-C program audio and video data to the main control module.
The DTMB receiving module receives the DTMB signals and demodulates the DTMB signals to obtain DTMB transport streams, and the DTMB transport streams comprise DTMB emergency broadcast messages and DTMB program audio and video data and are transmitted to the main control module.
The DVB-S receiving module receives DVB-S signals and demodulates the DVB-S signals to obtain DVB-S transmission streams, and the DVB-S transmission streams comprise DVB-S emergency broadcast messages and DVB-S program audio and video data and transmit the DVB-S emergency broadcast messages and the DVB-S program audio and video data to the main control module.
The digital medium wave receiving module receives the 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 main control 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, wherein the IP network data comprises IP network emergency broadcast messages and IP network program audio and video data and transmits the IP network emergency broadcast messages and the IP network program audio and video data to the main control module.
The audio switching module is used for switching and outputting audio of three paths of analog audio, one path of the analog audio is transmitted to the analog audio output module, the other path of the analog audio is transmitted to the main control module after being digitized by the audio acquisition module, the analog audio comprises analog FM program analog audio output by the FM-CDR receiving module, analog FM program analog audio output by the FM-RDS receiving module, digital program audio output by the main control module through the digital-to-analog conversion module or audio of auxiliary content of emergency broadcast messages, and the digital program audio is digital FM-FM-CDR or FM-RDS or DVB-C or DTMB or DVB-S or IP network digital program audio.
The analog audio output module receives analog audio from the audio switching module, directly outputs the analog audio through an analog audio interface or amplifies the analog audio.
The digital audio and video output module receives audio and video data from the main control module, processes the audio and video data and outputs the processed data through a digital audio interface or a digital audio and video interface, and the processing comprises at least one of decoding, code conversion, text-to-speech and synthesis.
And the safety module checks the signature for the emergency broadcast message.
The storage module stores emergency broadcast messages.
The main control module receives the emergency broadcast information of each channel from each receiving module, matches addresses and digital certificates with the emergency broadcast information, checks the tags of the digital certificates, removes the repetition of the sources of the multiple channels, sorts the emergency broadcast information according to the response time and sorts the emergency broadcast information according to the response priority, stores and updates the emergency broadcast information, responds to the emergency broadcast information with the highest priority, transmits the auxiliary content of the information to the digital audio and video output module, transmits the audio data of the emergency broadcast content to the analog audio output module after passing through the digital-to-analog conversion module and the audio switching module, receives the audio and video data of the digital program from the corresponding receiving module according to the parameters of the specified digital bytes of the emergency broadcast information, transmits the audio and video data of the digital program to the digital audio and video output module, transmits the audio and video data of the digital program to the analog audio output module after passing through the digital-to-analog audio output module, and receives the analog audio and video data from the FM-CDR receiving module or the FM-RDS receiving module according to the parameters of the specified analog program according to the emergency broadcast information One path of the FM program analog audio is transmitted to the analog audio output module through the audio switching module, and the other path of the FM program analog audio is transmitted to the digital audio and video output module through the audio acquisition module and the main control module, so that the digital audio and video output module and the analog audio output module are controlled to play.
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 main control module or the digital audio/video output module and is used for converting text into speech and audio.
Further, the main control 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 in all receiving channels are subjected to digital processing, the program analog audios of analog FM with the same frequency as CDR demodulated by the FM-CDR receiving module are digitized by the first audio acquisition module, the program analog audios of the analog FM of FM-RDS demodulated by the FM-RDS receiving module are digitized by the second audio acquisition module and then transmitted into the main control module, 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.
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 containing 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, a main control module 8, a safety module 9, a storage module 10, a digital-to-analog conversion module 11, an audio switching module 12, an analog audio output module 13, an audio acquisition module 14 and a digital audio and video output module 15.
The main control module 8 is connected with an FM-CDR receiving module 1, a first FM program audio acquisition module 14, an FM-RDS receiving module 2, a second FM program audio acquisition module 14, 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, a safety module 9, a storage module 10, a digital-to-analog conversion module 11, an audio acquisition module 14 and a digital audio and video output module 15.
The audio switching module 12 is connected with the FM-CDR receiving module 1, the FM-RDS receiving module 2, the digital-to-analog conversion module 11, the analog audio output module 13 and the audio acquisition module 14.
The FM-CDR receiving module 1 receives FM-CDR signals, demodulates the FM-CDR signals to obtain CDR program audio and video data and CDR emergency broadcast messages and then transmits the CDR program audio and video data and CDR emergency broadcast messages to the main control module 8, and demodulates the CDR program analog audio and video data to obtain analog FM program analog audio with the same frequency as that of the CDR and then transmits the analog FM program analog audio and video data and CDR emergency broadcast messages to the audio switching module 12.
The FM-RDS receiving module 2 receives FM-RDS signals, demodulates the FM-RDS signals to obtain RDS emergency broadcast messages and then transmits the RDS emergency broadcast messages to the main control module 8, and demodulates the RDS emergency broadcast messages to obtain FM program analog audio of analog FM of the FM-RDS and then transmits the FM program analog audio to the audio switching module 12.
And the DVB-C receiving module 3 receives the DVB-C signal and demodulates the DVB-C signal to obtain a DVB-C transport stream, and the DVB-C transport stream comprises DVB-C emergency broadcast information and DVB-C program audio and video data and transmits the DVB-C emergency broadcast information and the DVB-C program audio and video data to the main control module 8.
The DTMB receiving module 4 receives the DTMB signals, demodulates the DTMB signals to obtain DTMB transport streams, and the DTMB transport streams comprise DTMB emergency broadcast messages and DTMB program audio and video data and transmit the DTMB emergency broadcast messages and the DTMB program audio and video data to the main control module 8.
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 including DVB-S emergency broadcast messages and DVB-S program audio and video data to the main control module 8.
The digital medium wave receiving module 6 receives the digital medium wave signal, demodulates the digital medium wave signal to obtain a digital medium wave transport stream, and transmits the digital medium wave transport stream to the main control module 8, wherein the digital medium wave transport 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, wherein the IP network data comprises IP network emergency broadcast messages and IP network program audio and video data and transmits the IP network emergency broadcast messages and the IP network program audio and video data to the main control module 8.
The audio switching module 12 performs audio switching output of three paths of analog audio, one path of the analog audio is transmitted to the analog audio output module 13, the other path of the analog audio is digitized by the audio acquisition module 14 and then transmitted to the main control module 8, the analog audio includes analog FM program analog audio output by the FM-CDR receiving module 1, analog FM program analog audio output by the FM-RDS receiving module 2, and digital program audio output by the main control module 8 through the digital-to-analog conversion module 11 or audio of auxiliary content of emergency broadcast message, and the digital program audio is digital FM-CDR, FM-RDS, DVB-C, DTMB, DVB-S or IP network.
The analog audio output module 13 receives analog audio from the audio switching module 12, and outputs the analog audio directly or through an analog audio interface.
The digital audio/video output module 15 receives audio/video data from the main control module 8, and outputs the audio/video data through a digital audio interface or a digital audio/video interface after processing, wherein the processing includes at least one of decoding, code conversion, text-to-speech and synthesis.
And the safety module 9 checks the emergency broadcast message.
The storage module 10 stores emergency broadcast messages.
The main control module 8 receives the emergency broadcast messages of each channel from each receiving module, matches addresses with the emergency broadcast messages, checks the digital certificates, removes the repetition of multi-channel sources, sorts the emergency broadcast messages 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 auxiliary content of the messages to the digital audio and video output module 15, transmits the audio data of the emergency broadcast content to the analog audio output module 13 after passing through the digital-to-analog conversion module 11 and the audio switching module 12, receives the digital program audio and video data from the corresponding receiving module according to the parameters of the digital bytes specified by the emergency broadcast messages, transmits the digital program audio and video data to the digital audio and video output module 15, and transmits the digital program audio and video data to the analog audio output module 13 after passing through the digital-to-analog conversion module 11 and the audio switching module 12, the parameters of the analog program specified by the emergency broadcast message are received from the FM-CDR receiving module 1 or the FM-RDS receiving module 2 to simulate the FM program analog audio frequency, one path of the program analog audio frequency is transmitted to the analog audio frequency output module 13 through the audio frequency switching module 12, and the other path of the program analog audio frequency is transmitted to the digital audio and video output module 15 through the audio frequency acquisition module 14 and the main control module 8, so that the digital audio and video output module 15 and the analog audio frequency output module 13 are controlled to play.
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 16 which is connected with the main control module 8 or the digital audio and video output module 15 for performing text conversion to speech and audio.
Further, the main control module 8 transmits the terminal status and the response emergency broadcast message condition 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 9 is a huada electronic CIU98 chip or a square inch micro T630 chip.
Further, the core of the text-to-speech module 16 is a SYNs 6658 chip under the heaven of astronomy or a CSK4002 chip in 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 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, 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 14 and then transmitted into the main control module 8, so that the unified digital processing of multichannel signals such as FM-CDR signals is realized, the analog components are reduced, the structure is simplified, the interference resistance is realized, and the quality of output signals is improved.
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, comprising: FM-CDR receiving module, FM-RDS receiving module, DVB-C receiving module, DTMB receiving module, DVB-S receiving module, digital medium wave receiving module, IP network module, main control module, safety module, storage module, digital-to-analog conversion module, audio switching module, analog audio output module, audio acquisition module, digital audio and video output module, wherein the main control module is connected with FM-CDR receiving module, first FM program audio acquisition module, FM-RDS receiving module, second FM program audio acquisition module, DVB-C receiving module, DTMB receiving module, DVB-S receiving module, digital medium wave receiving module, IP network module, safety module, storage module, digital-to-analog conversion module, audio acquisition module, digital audio and video output module, and the audio switching module is connected with FM-CDR receiving module, digital audio and video output module, The system comprises an FM-RDS receiving module, a digital-to-analog conversion module, an analog audio output module and an audio acquisition module;
the FM-CDR receiving module receives FM-CDR signals, demodulates the FM-CDR signals to obtain CDR program audio and video data and CDR emergency broadcast messages and then transmits the CDR program audio and video data and CDR emergency broadcast messages to the main control module, and demodulates the CDR program analog audio and video data to obtain analog FM program analog audio with the same frequency as the CDR and then transmits the analog FM program analog audio and video data and CDR emergency broadcast messages to the audio switching module;
the FM-RDS receiving module receives FM-RDS signals, demodulates the FM-RDS signals to obtain RDS emergency broadcast messages and then transmits the RDS emergency broadcast messages to the main control module, and demodulates the RDS emergency broadcast messages to obtain FM program analog audio of analog FM of the FM-RDS and then transmits the FM program analog audio to the audio switching module;
the DVB-C receiving module receives DVB-C signals and demodulates the DVB-C signals to obtain DVB-C transmission streams, and the DVB-C transmission streams comprise DVB-C emergency broadcast messages and DVB-C program audio and video data and are transmitted to the main control module;
the DTMB receiving module receives the DTMB signals and demodulates the DTMB signals to obtain DTMB transport streams, and the DTMB transport streams comprise DTMB emergency broadcast messages and DTMB program audio and video data and are transmitted to the main control module;
the DVB-S receiving module receives DVB-S signals and demodulates the DVB-S signals to obtain DVB-S transmission streams, and the DVB-S transmission streams comprise DVB-S emergency broadcast messages and DVB-S program audio and video data and are transmitted to the main control module;
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 main control 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, wherein the IP network data comprises IP network emergency broadcast messages and IP network program audio and video data and transmits the IP network emergency broadcast messages and the IP network program audio and video data to the main control module;
the audio switching module is used for switching and outputting three paths of analog audio, one path of the analog audio is transmitted to the analog audio output module, the other path of the analog audio is digitized by the audio acquisition module and then transmitted to the main control module, the analog audio comprises analog FM program analog audio output by the FM-CDR receiving module, analog FM program analog audio output by the FM-RDS receiving module, digital program audio output by the main control module through the digital-to-analog conversion module or audio of auxiliary content of emergency broadcast messages, and the digital program audio is digital FM-CDR or FM-RDS or DVB-C or DTMB-S or IP network digital program audio;
the analog audio output module receives analog audio from the audio switching module, directly outputs the analog audio through an analog audio interface or amplifies the analog audio;
the digital audio and video output module receives audio and video data from the main control module, processes the audio and video data and outputs the processed data through a digital audio interface or a digital audio and video interface, wherein the processing comprises at least one of decoding, code conversion, text-to-speech and synthesis;
the safety module checks the signature corresponding to the emergency broadcast message;
the storage module is used for storing emergency broadcast messages;
the main control module receives the emergency broadcast information of each channel from each receiving module, matches addresses and digital certificates with the emergency broadcast information, checks the tags of the digital certificates, removes the repetition of the sources of the multiple channels, sorts the emergency broadcast information according to the response time and sorts the emergency broadcast information according to the response priority, stores and updates the emergency broadcast information, responds to the emergency broadcast information with the highest priority, transmits the auxiliary content of the information to the digital audio and video output module, transmits the audio data of the emergency broadcast content to the analog audio output module after passing through the digital-to-analog conversion module and the audio switching module, receives the audio and video data of the digital program from the corresponding receiving module according to the parameters of the specified digital bytes of the emergency broadcast information, transmits the audio and video data of the digital program to the digital audio and video output module, transmits the audio and video data of the digital program to the analog audio output module after passing through the digital-to-analog audio output module, and receives the analog audio and video data from the FM-CDR receiving module or the FM-RDS receiving module according to the parameters of the specified analog program according to the emergency broadcast information One path of the FM program analog audio is transmitted to the analog audio output module through the audio switching module, and the other path of the FM program analog audio is transmitted to the digital audio and video output module through the audio acquisition module and the main control module, so that the digital audio and video output module and the analog audio output module are controlled to play;
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 recited in claim 1, further comprising a text-to-speech module connected to the main control module or the digital audio/video output module for performing text-to-speech audio conversion.
3. The multimode emergency broadcast terminal with FM-CDR reception as claimed in claim 1, wherein the host module returns the terminal status and 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 of claim 1, wherein the core of the 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.
CN202111569092.1A 2021-12-21 2021-12-21 Multimode emergency broadcast terminal with FM-CDR receiving function Withdrawn CN114205038A (en)

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