CN114337886A - Multimode emergency broadcast terminal with FM-CDR receiving function - Google Patents
Multimode emergency broadcast terminal with FM-CDR receiving function Download PDFInfo
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Abstract
The invention relates to a multimode emergency broadcast terminal with FM-CDR reception, which comprises an FM-CDR receiving module, a first audio acquisition module, an FM-RDS receiving module, a second audio acquisition 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, a first FM program audio data buffer area, an RDS data buffer area, a second FM program audio 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 and an output module. The invention simultaneously supports signal channels such as FM-CDR and the like to receive emergency broadcast messages, and improves the channel disaster resistance of the terminal.
Description
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 with FM-CDR receiving function comprises an FM-CDR receiving module, a first audio acquisition module, an FM-RDS receiving module, a second audio acquisition 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, a first FM program audio data buffer area, an RDS data buffer area, a second FM program audio 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 and an output module.
The extraction module is connected with the CDR data buffer area, the first FM program audio data buffer area, the RDS data buffer area, the second FM program audio 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 safety module, the storage module 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 CDR data buffer area, demodulates the CDR data to obtain program analog audio frequency of analog FM with the same frequency as that of the CDR and then transmits the program analog audio frequency to the first audio frequency acquisition 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, 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 of analog FM 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 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 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 extracting module extracts the emergency broadcast message of each channel from the first buffer group and transmits the emergency broadcast message to the message processing module, and extracts the program audio and video data from a certain buffer area in the second buffer group according to the program parameters specified by the emergency broadcast message and transmits the 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 with 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 program audio and video data from a certain buffer area in the second buffer area group to the playing content processing module, and controls the playing content processing module to receive the playing content from the message processing module or the extraction 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 the playing content from the message processing module or the extraction module, processes the playing content into playing audio and video data and transmits the playing audio and video data to the output module, wherein the processing comprises at least one of decoding, code conversion, text-to-speech and synthesis.
The output module receives the played audio and video data from the played content processing module and outputs the played audio and video data through a digital audio interface or a digital audio and video interface, or outputs the played audio data through an analog audio interface after digital-to-analog conversion, wherein each quantity is at least one.
The first buffer group comprises an FM-CDR data buffer area, an FM-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 and an IP network module.
The second buffer group comprises a first buffer group, a first FM program audio data buffer area and a second FM program audio data buffer area.
The emergency broadcast messages of each channel comprise CDR emergency broadcast messages, RDS emergency broadcast messages, DVB-C emergency broadcast messages, DTMB emergency broadcast messages, DVB-S emergency broadcast messages, digital medium wave emergency broadcast messages and IP network emergency broadcast messages.
And the text-to-speech module is connected with the message processing module or the playing content processing module and is used for performing text conversion on the playing content to obtain speech and audio.
Further, the message processing module transmits the terminal state and the condition of responding to the emergency broadcast message back to the emergency broadcast platform through the IP network module.
Further, the core of the FM-CDR receiving module is a hel Hi5216 chip.
Further, the core of the security module is a Huada electronic CIU98 chip or a square inch micro T630 chip.
Furthermore, the core of the text-to-speech module is a SYNs 6658 chip under the heaven of astronomy or a CSK4002 chip of science news.
Compared with the prior art, the invention has the beneficial effects that:
1) meanwhile, the emergency broadcast terminal supports various signal channels of digital frequency modulation FM-CDR, analog frequency modulation with subcarriers, cable digital television, ground wireless digital television, satellite digital television, digital medium wave, cable or wireless network to receive emergency broadcast messages, and can still receive the emergency broadcast messages through other channels to carry out emergency broadcast playing under the condition that signals of partial channels are interrupted, so that the channel disaster resistance of the emergency broadcast terminal is improved.
2) The method can be used for uniformly processing CDR emergency broadcast messages, RDS emergency broadcast messages, DVB-C emergency broadcast messages, DTMB emergency broadcast messages, DVB-S emergency broadcast messages, digital medium wave emergency broadcast messages and IP network emergency broadcast messages, and comprises the steps of matching addresses, checking digital certificates, removing duplication of multi-channel sources, sorting according to response time, sorting according to response priority, storing and updating emergency broadcast messages and responding to the emergency broadcast messages with the highest priority.
3) Program analog audios 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 corresponding data buffer area, so that unified digital processing of multichannel signals such as FM-CDR signals is realized, analog components are reduced, the structure is simplified, interference resistance is realized, and the quality of output signals is improved.
4) Each receiving channel is matched with a corresponding data buffer area and comprises a CDR data buffer area, a first FM program audio data buffer area, an RDS data buffer area, a second FM program audio 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 and an IP network data buffer area, and an extraction module is convenient to acquire emergency broadcast messages and program audio and video data of each receiving channel and clear in system structure.
5) 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 current executed emergency broadcast message is responded and the emergency broadcast message designates a 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 program audio and video data and then transmits the program 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.
6) 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 respectively acquires the broadcast content from the message processing module and the extraction module according to the broadcast 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 with FM-CDR receiving function comprises an FM-CDR receiving module 1, a first audio acquisition module 2, an FM-RDS receiving module 3, a second audio acquisition module 4, a DVB-C receiving module 5, a DTMB receiving module 6, a DVB-S receiving module 7, a digital medium wave receiving module 8, an IP network module 9, a CDR data buffer area 10, a first FM program audio data buffer area 11, an RDS data buffer area 12, a second FM program audio data buffer area 13, a DVB-C transmission stream buffer area 14, a DTMB transmission stream buffer area 15, a DVB-S transmission stream buffer area 16, a digital medium wave data buffer area 17, an IP network data buffer area 18, an extraction module 19, a message processing module 20, a safety module 21, a storage module 22, a playing content processing module 23 and an output module 24.
The extraction module 19 is connected to the CDR data buffer 10, the first FM program audio data buffer 11, the RDS data buffer 12, the second FM program audio data buffer 13, the DVB-C transmission stream buffer 14, the DTMB transmission stream buffer 15, the DVB-S transmission stream buffer 16, the digital medium wave data buffer 17, the IP network data buffer 18, the message processing module 20, and the playing content processing module 23.
Wherein the message processing module 20 is connected with the security module 21, the storage module 22 and the playing content processing module 23.
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 10, demodulates the CDR data to obtain program analog audio of analog FM with the same frequency as that of CDR, and transmits the program analog audio to the first audio acquisition module 2, wherein the CDR data comprises CDR emergency broadcast messages and CDR program audio and video data.
The first audio acquisition module 2 receives program analog audio of analog FM having the same frequency as the CDR, and after analog-to-digital conversion, transmits the program analog audio to the first FM program audio data buffer 11.
The FM-RDS receiving module 3 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 12, demodulates the FM-RDS program analog audio of analog FM and then transmits the program analog audio to the second audio acquisition module 4, and the RDS data comprises RDS emergency broadcast messages.
The second audio acquisition module 4 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 13.
The DVB-C receiving module 5 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 14, wherein the DVB-C transmission streams comprise DVB-C emergency broadcast messages and DVB-C program audio and video data.
The DTMB receiving module 6 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 15, wherein the DTMB transmission streams comprise DTMB emergency broadcast messages and DTMB program audio and video data.
The DVB-S receiving module 7 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 16, 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 8 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 9 receives IP network data of 3G, 4G, 5G, 6G, or a cable network and then transmits the IP network data to the IP network data buffer 18, where the IP network data includes IP network emergency broadcast messages and IP network program audio/video data.
The extracting module 19 extracts the emergency broadcast message of each channel from the first buffer group and transmits the emergency broadcast message to the message processing module 20, and extracts the program audio and video data from a certain buffer in the second buffer group according to the program parameter specified by the emergency broadcast message and transmits the program audio and video data to the playing content processing module 23.
The message processing module 20 receives the emergency broadcast messages of each channel from the extraction module 19, matches addresses with the emergency broadcast messages, checks the tags of the digital certificates, removes the duplication of the sources of the multiple channels, 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 message with the highest priority, transmits the message auxiliary content of the emergency broadcast message to the broadcast content processing module 23, sends the digital program parameters specified by the emergency broadcast message to the extraction module 19, controls the extraction module 19 to extract the program audio and video data from a certain buffer area in the second buffer area group to the broadcast content processing module 23, and controls the broadcast content processing module 23 to receive the broadcast content from the message processing module 20 or the extraction module 19.
The security module 21 checks the emergency broadcast message.
The storage module 22 stores emergency broadcast messages.
The playing content processing module 23 obtains the playing content from the message processing module 20 or the extraction module 19, processes the playing content into playing audio/video data, and transmits the playing audio/video data to the output module 24, wherein the processing includes at least one of decoding, code conversion, text-to-speech, and synthesis.
The output module 24 receives the played audio/video data from the played content processing module 23, and outputs the played audio/video data through a digital audio interface or a digital audio/video interface, or outputs the played audio data through an analog audio interface after performing digital-to-analog conversion, wherein at least one of the played audio/video data is output.
The first buffer group comprises an FM-CDR data buffer 10, an FM-RDS data buffer 12, a DVB-C transmission stream buffer 14, a DTMB transmission stream buffer 15, a DVB-S transmission stream buffer 16, a digital medium wave data buffer 17 and an IP network module 9.
The second buffer group comprises a first buffer group, a first FM program audio data buffer 11 and a second FM program audio data buffer 13.
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 20 or the playing content processing module 23 and performs text-to-speech audio on the playing content.
Further, the message processing module 20 transmits the terminal status and the response emergency broadcast message status back to the emergency broadcast platform through the IP network module 9.
Further, the core of the FM-CDR receiving module 1 is a hel Hi5216 chip.
Further, the core of the security module 21 is a huada electronic CIU98 chip or a cun 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) Program analog audios in all receiving channels are 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 2, the program analog audio of the analog FM of the FM-RDS demodulated by the FM-RDS receiving module 3 is digitized by the second audio acquisition module 4 and then is transmitted into a corresponding data buffer area, so that unified digital processing of multichannel signals such as FM-CDR signals is realized, analog components are reduced, the structure is simplified, interference resistance is realized, and the quality of output signals is improved.
4) Each receiving channel is matched with a corresponding data buffer area, and comprises a CDR data buffer area 10, a first FM program audio data buffer area 11, an RDS data buffer area 12, a second FM program audio data buffer area 13, a DVB-C transmission stream buffer area 14, a DTMB transmission stream buffer area 15, a DVB-S transmission stream buffer area 16, a digital medium wave data buffer area 17 and an IP network data buffer area 18, an extraction module 19 is convenient to acquire emergency broadcast messages and program audio and video data of each receiving channel, and the system structure is clear.
5) The extraction module 19 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 19 selects a data buffer of a corresponding channel from each data buffer such as the CDR data buffer 10 and then extracts program audio and video data and then transfers the program audio and video data to the play content processing module 23. This simplifies the processing complexity of the extraction module 19 and reduces the computational overhead of the extraction module 19.
6) 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 23 respectively acquires the broadcast content from the message processing module 20 and the extraction module 19 according to the broadcast content source. The playing content processing module 23 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, first audio collecting module, FM-RDS receiving module, second audio collecting module, DVB-C receiving module, DTMB receiving module, DVB-S receiving module, digital medium wave receiving module, IP network module, CDR data buffer zone, first FM program audio data buffer zone, RDS data buffer zone, second FM program audio data buffer zone, DVB-C transmission stream buffer zone, DTMB transmission stream buffer zone, DVB-S transmission stream buffer zone, digital medium wave data buffer zone, IP network data buffer zone, extracting module, message processing module, safety module, storage module, playing content processing module and output module, wherein the extracting module is connected with CDR data buffer zone, first FM program audio data buffer zone, RDS data buffer zone, second FM program audio data buffer zone, DVB-C transmission stream buffer zone, The device comprises 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, a message processing module and a playing content processing module, wherein the message processing module is connected with a security module, a storage module and the playing content processing module;
the FM-CDR receiving module receives an FM-CDR signal, demodulates to obtain CDR data and then transmits the CDR data to a CDR data buffer area, demodulates to obtain program analog audio frequency of analog FM with the same frequency as that of the CDR and then transmits the program analog audio frequency to the first audio frequency acquisition module, and 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 RDS data buffer area, demodulates the program analog audio frequency of analog FM of the FM-RDS and then transmits the program analog audio frequency to the second audio frequency acquisition module, and the RDS data comprises RDS emergency broadcast information;
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 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 the first buffer group and transmits the emergency broadcast message to the message processing module, and extracts the program audio and video data from a certain buffer area in the second buffer group according to the program parameters specified by the emergency broadcast message and transmits the program audio and video data to the playing content processing module;
the message processing module receives the emergency broadcast messages of each channel from the extraction module, matches addresses with the emergency broadcast messages, checks the tags by 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 message with the highest priority, transmits the message auxiliary content of the emergency broadcast message to the playing content processing module, sends the digital program parameters specified by the emergency broadcast message to the extraction module, controls the extraction module to extract the program audio and video data from a certain buffer area in the second buffer area group to the playing content processing module, and controls the playing content processing module to receive the playing content from the message processing module or the extraction 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, processes the playing content into playing audio and video data and transmits the playing audio and video data to the output module, wherein the processing comprises at least one of decoding, code conversion, text-to-speech and synthesis;
the output module receives the played audio and video data from the played content processing module and outputs the played audio and video data through a digital audio interface or a digital audio and video interface, or outputs the played audio data through an analog audio interface after digital-to-analog conversion, wherein each quantity is at least one;
the first buffer group comprises an FM-CDR data buffer area, an FM-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 and an IP network module;
the second buffer group comprises a first buffer group, a first FM program audio data buffer area and a second FM program audio data buffer area;
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 sends the terminal status and the response emergency broadcast message status back to the emergency broadcast platform through the IP network module.
4. The multimode emergency broadcast terminal with FM-CDR reception as claimed in 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 claimed 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.
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| CN202111551380.4A CN114337886A (en) | 2021-12-21 | 2021-12-21 | Multimode emergency broadcast terminal with FM-CDR receiving function |
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| CN202111551380.4A CN114337886A (en) | 2021-12-21 | 2021-12-21 | Multimode emergency broadcast terminal with FM-CDR receiving function |
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| CN114337886A true CN114337886A (en) | 2022-04-12 |
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Application publication date: 20220412 |