CN114205035A - Multimode emergency broadcast terminal containing FM-CDR (frequency modulation-CDR) receiving - Google Patents

Multimode emergency broadcast terminal containing FM-CDR (frequency modulation-CDR) receiving Download PDF

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Publication number
CN114205035A
CN114205035A CN202111569002.9A CN202111569002A CN114205035A CN 114205035 A CN114205035 A CN 114205035A CN 202111569002 A CN202111569002 A CN 202111569002A CN 114205035 A CN114205035 A CN 114205035A
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module
audio
emergency broadcast
cdr
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)
  • Emergency Management (AREA)
  • Business, Economics & Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Multimedia (AREA)
  • Computer Security & Cryptography (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Public Health (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 CDR data buffer area, an RDS data buffer area, a DVB-C transmission stream buffer area, a DTMB transmission stream buffer area, a DVB-S transmission stream buffer area, a digital medium wave data buffer area, an IP network data buffer area, an extraction module, a message processing module, a safety module, a storage module, 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

Multimode emergency broadcast terminal containing FM-CDR (frequency modulation-CDR) receiving
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 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 containing FM-CDR reception 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 CDR data buffer area, an RDS data buffer area, a DVB-C transmission stream buffer area, a DTMB transmission stream buffer area, a DVB-S transmission stream buffer area, a digital medium wave data buffer area, an IP network data buffer area, an extraction module, a message processing module, a safety module, a storage module, 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 CDR data buffer area, the RDS data buffer area, the DVB-C transmission stream buffer area, the DTMB transmission stream buffer area, the DVB-S transmission stream buffer area, the digital medium wave data buffer area, the IP network data buffer area, the message processing module and the playing content processing module.
The message processing module is connected with the extraction module, the safety module, the storage module and the playing content processing module.
The playing content processing module is connected with the extraction module, the message processing module, the digital audio and video output module, the digital-to-analog conversion module and the audio acquisition 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 data and then transmits the CDR data to the CDR data buffer area, 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 audio switching module, and the CDR data comprise CDR emergency broadcast messages and CDR program audio and video data.
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 RDS data buffer area, demodulates the FM-RDS program analog audio to obtain FM analog program analog audio of FM analog and then transmits the FM analog audio to the audio switching module, and the RDS data comprises RDS emergency broadcast information.
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 DVB-C transmission stream buffer area, and 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 DTMB transmission stream buffer area, 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 DVB-S transmission stream buffer area, 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 a digital medium wave transmission stream buffer area, 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 an IP network data buffer area, wherein the IP network data comprises IP network emergency broadcast information and IP network program audio and video data.
The extraction module extracts the emergency broadcast message of each channel from each data buffer area 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 playing content processing module.
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 the message auxiliary content of the emergency broadcast messages to the playing content processing module, 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 data buffer area of the corresponding channel and then transmits the digital program audio and video data to the playing content processing module, 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 receive playing content from the message processing module or the extraction module 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 processing module or the extraction module or from the audio switching module through 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, 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 data buffer area comprises at least one FM-CDR data buffer area, at least one FM-RDS data buffer area, at least one DVB-C transmission stream buffer area, at least one DTMB transmission stream buffer area, at least one DVB-S transmission stream buffer area, at least one digital medium wave data buffer area and at least one IP network module.
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 designates the digital program, the extraction module selects a data buffer area of a corresponding channel from data buffer areas such as a CDR data buffer area and the like, extracts audio and video data of the digital program and then transmits the audio and video data to the playing content processing module. 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 acquires the broadcast content from the message processing module, the extraction module and the audio acquisition module according to the broadcast content sources. 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 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 CDR data buffer area 8, an RDS data buffer area 9, a DVB-C transmission stream buffer area 10, a DTMB transmission stream buffer area 11, a DVB-S transmission buffer area 12, a digital medium wave data buffer area 13, an IP network data buffer area 14, an extraction module 15, a message processing module 16, a safety module 17, a storage module 18, a playing content processing module 19, a digital audio and video output module 20, a digital-to-analog conversion module 21, an audio switching module 22, an analog audio output module 23 and an audio acquisition module 24.
The extraction module 15 is connected with the CDR data buffer 8, the RDS data buffer 9, the DVB-C transmission stream buffer 10, the DTMB transmission stream buffer 11, the DVB-S transmission stream buffer 12, the digital medium wave data buffer 13, the IP network data buffer 14, the message processing module 16, and the playing content processing module 19.
The message processing module 16 is connected with the extraction module 15, the security module 17, the storage module 18 and the playing content processing module 19.
The playing content processing module 19 is connected to the extracting module 15, the message processing module 16, the digital audio/video output module 20, the digital-to-analog conversion module 21, and the audio acquisition module 24.
The audio switching module 22 is connected to the FM-CDR receiving module 1, the FM-RDS receiving module 2, the digital-to-analog conversion module 21, the analog audio output module 23, and the audio acquisition module 24.
The FM-CDR receiving module 1 receives FM-CDR signals, demodulates the FM-CDR signals to obtain CDR data, transmits the CDR data to the CDR data buffer area 8, demodulates the CDR data to obtain program analog audio of analog FM with the same frequency as that of the CDR, and transmits the program analog audio to the audio switching module 22, wherein the CDR data comprises CDR emergency broadcast messages and CDR program audio and video data.
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 RDS data buffer area 9, demodulates the FM-RDS program analog audio of analog FM and then transmits the program analog audio to the audio switching module 22, and the RDS data comprises RDS emergency broadcast messages.
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 DVB-C transmission stream buffer area 10, 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 DTMB transmission stream buffer area 11, wherein 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 DVB-S transmission stream buffer area 12, 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 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 digital medium wave transmission stream buffer area, 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 IP network data buffer area 14, wherein the IP network data comprises IP network emergency broadcast information and IP network program audio and video data.
The extracting module 15 extracts the emergency broadcast message of each channel from each data buffer and transmits the emergency broadcast message to the message processing module 16, and extracts the audio and video data of the digital program from the corresponding channel according to the digital program parameters specified by the emergency broadcast message and transmits the audio and video data of the digital program to the playing content processing module 19.
The message processing module 16 receives the emergency broadcast message of each channel from the extraction module 15, matching addresses of emergency broadcast messages, checking labels of digital certificates, removing repetition of multi-channel sources, sorting according to response time and sorting according to response priority, storing and updating the emergency broadcast messages, responding to the emergency broadcast messages with the highest priority, transmitting message auxiliary contents of the emergency broadcast messages to a broadcast content processing module 19, transmitting digital program parameters specified by the emergency broadcast messages to an extraction module 15, controlling the extraction module 15 to extract digital program audio and video data from a data buffer area of a corresponding channel and then transmit the digital program audio and video data to the broadcast content processing module 19, controlling an audio switching module 22 to select one path to output to an analog audio output module 23 or an audio acquisition module 24, and controlling the broadcast content processing module 19 to receive broadcast contents from a message processing module 16 or the extraction module 15 or the audio acquisition module 24.
And the safety module 17 checks the emergency broadcast message.
The storage module 18 stores emergency broadcast messages.
The playing content processing module 19 obtains the playing content from the message processing module 16 or the extraction module 15 or from the audio switching module 22 through the audio acquisition module 24, 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 20, and transmits the playing content to the analog audio output module 23 through the digital-to-analog conversion module 21 and the audio switching module 22, wherein the processing includes at least one of decoding, encoding conversion, text-to-speech, text-to-text and synthesis.
The audio switching module 22 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 21, and three ways select one way, one way is output to the analog audio output module 23, and the other way is output to the broadcast content processing module 19 through the audio acquisition module 24.
The digital audio/video output module 20 receives the playing audio/video data from the playing content processing module 19, and outputs the playing audio/video data through a digital audio interface or a digital audio/video interface.
The analog audio output module 23 receives the analog audio from the audio switching module 22 and outputs the analog audio through the analog audio interface.
The data buffers comprise an FM-CDR data buffer 8, an FM-RDS data buffer 9, a DVB-C transmission stream buffer 10, a DTMB transmission stream buffer 11, a DVB-S transmission stream buffer 12, a digital medium wave data buffer 13 and an IP network module 7, wherein at least one data buffer is provided.
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 25, which is connected with the message processing module 16 or the playing content processing module 19 and performs text-to-speech audio on the playing content.
Further, the message processing module 16 transmits the terminal status and the response emergency broadcast message status 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 17 is a huada electronic CIU98 chip or a square inch micro T630 chip.
Further, the core of the text-to-speech module 25 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 audio switching module 22 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 21, 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 15 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 15 selects a data buffer of a corresponding channel from each data buffer such as the CDR data buffer 8 and then extracts digital program audio and video data and then transfers the digital program audio and video data to the play content processing module 19. This simplifies the processing complexity of the extraction module 15 and reduces the computational overhead of the extraction module 15.
5) The emergency broadcast message auxiliary content, the digital program including the FM-CDR and the analog program are supported, and the broadcast content processing module 19 respectively obtains the broadcast content from the message processing module 16, the extraction module 15 and the audio acquisition module 24 according to the broadcast content source. The playing content processing module 19 is convenient for receiving the 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, 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, CDR data buffer area, RDS data buffer area, DVB-C transmission stream buffer area, DTMB transmission stream buffer area, DVB-S transmission stream buffer area, digital medium wave data buffer area, IP network data buffer area, extracting module, message processing module, safety module, storage module, playing content processing module, digital audio/video output module, digital-to-analog conversion module, audio switching module, analog audio output module and audio acquisition module, wherein the extracting module is connected with CDR data buffer area, RDS data buffer area, DVB-C transmission stream buffer area, DTMB transmission stream buffer area, DVB-S transmission stream buffer area, digital medium wave data buffer area, The device comprises an IP network data buffer area, a message processing module and a playing content processing module, wherein the message processing module is connected with an extraction module, a safety module, a storage module and a playing content processing module, the playing content processing module is connected with the extraction module, the message processing module, a digital audio and video output module, a digital-to-analog conversion module and an audio acquisition module, and the audio switching module is connected with an FM-CDR receiving module, 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 data and then transmits the CDR data to a CDR data buffer area, 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 audio switching module, and the CDR data comprise CDR emergency broadcast messages and CDR program audio and video data;
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 RDS data buffer area, demodulates the program analog audio frequency of the analog FM of the FM-RDS and then transmits the program analog audio frequency to the audio frequency switching module, and the RDS data comprises RDS emergency broadcast information;
the DVB-C receiving module receives a DVB-C signal, demodulates a DVB-C transmission stream to obtain a DVB-C transmission stream and then transmits the DVB-C transmission stream to a DVB-C transmission stream buffer zone, wherein the DVB-C transmission stream comprises 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 transmission streams and transmits the DTMB transmission streams to the DTMB transmission stream buffer area, and the DTMB transmission streams comprise DTMB emergency broadcast messages and DTMB program audio and video data;
the DVB-S receiving module receives a DVB-S signal, demodulates to obtain a DVB-S transmission stream and transmits the DVB-S transmission stream to a DVB-S transmission stream buffer zone, wherein the DVB-S transmission stream comprises 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 a digital medium wave transmission stream buffer area, 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 an IP network data buffer area, 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 each data buffer area 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 playing content processing module;
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 the playing content processing module, sends the digital program parameters specified by the emergency broadcast messages to the extraction module, controls the extraction module to extract the audio and video data of the digital programs from the data buffer area of the corresponding channels and then transmits the data to the playing content processing module, 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 receive the playing content from the message processing module or the extraction module 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 processing module or the extraction module or from the audio switching module through the audio acquisition module, processes the playing content into playing audio and video data, and then transmits the playing content 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 data buffer area comprises at least one FM-CDR data buffer area, at least one FM-RDS data buffer area, at least one DVB-C transmission stream buffer area, at least one DTMB transmission stream buffer area, at least one DVB-S transmission stream buffer area, at least one digital medium wave data buffer area and at least one IP network module;
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 claimed in claim 1, wherein the message processing 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 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.
CN202111569002.9A 2021-12-21 2021-12-21 Multimode emergency broadcast terminal containing FM-CDR (frequency modulation-CDR) receiving Withdrawn CN114205035A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117955760A (en) * 2024-03-25 2024-04-30 央广云听文化传媒有限公司 Signal switching method, apparatus, electronic device, storage medium, system, and computer program product

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117955760A (en) * 2024-03-25 2024-04-30 央广云听文化传媒有限公司 Signal switching method, apparatus, electronic device, storage medium, system, and computer program product

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