CN107249175A - A kind of group intercommunication extension system based on mobile terminal - Google Patents
A kind of group intercommunication extension system based on mobile terminal Download PDFInfo
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- CN107249175A CN107249175A CN201710516132.3A CN201710516132A CN107249175A CN 107249175 A CN107249175 A CN 107249175A CN 201710516132 A CN201710516132 A CN 201710516132A CN 107249175 A CN107249175 A CN 107249175A
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- intercommunication
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- expansion equipment
- mobile terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/10—Push-to-Talk [PTT] or Push-On-Call services
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- Mobile Radio Communication Systems (AREA)
Abstract
System is extended the invention provides a kind of group intercommunication based on mobile terminal, including：Multiple intercommunication expansion equipments and multiple mobile terminals, intercommunication expansion equipment is corresponded with mobile terminal, wherein, intercommunication expansion equipment includes bluetooth module, wherein, bluetooth module includes signalling path and voice channel, and mobile terminal controls intercommunication expansion equipment to carry out data processing by the signalling path of bluetooth module；Intercommunication expansion equipment is set up with mobile terminal by the voice channel of bluetooth module and communicated to connect, mobile terminal is connected to another mobile terminal by wireless network, another mobile terminal is set up by the bluetooth module of another intercommunication expansion equipment with another intercommunication expansion equipment and communicated to connect, and realizes the telecommunication between intercommunication expansion equipment and another intercommunication expansion equipment.By the embodiment of the present invention, realize between existing intercommunication expansion equipment and to carry out telecommunication using wireless network, realize networking function between intercommunication expansion equipment.
Description
Technical field
The present invention relates to intercommunication expansion equipment field, and in particular to a kind of group intercommunication extension system based on mobile terminal
System.
Background technology
With the fast development of communication science and technology, digital communication system is with its outstanding performance in increasing application
Traditional analog communication system is gradually instead of, as mainstream development direction in the communications field.
But the intercommunication expansion equipment market of China is still that simulation intercommunication expansion equipment is occupied an leading position at present, existing simulation
It can not be attached between intercommunication expansion equipment using wireless network, be that this existing intercommunication expansion equipment lacks networking function, no
Telecommunication can be realized.
The content of the invention
Therefore, the technical problem to be solved in the present invention lacks group between being to overcome intercommunication expansion equipment of the prior art
The defect of net function, so as to provide a kind of intercommunication expansion equipment group network system.
Therefore, the embodiments of the invention provide following technical scheme：
System is extended the embodiments of the invention provide a kind of group intercommunication based on mobile terminal, described group intercommunication is expanded
Exhibition system includes：Multiple intercommunication expansion equipments and multiple mobile terminals, the intercommunication expansion equipment are corresponded with mobile terminal,
Wherein, the intercommunication expansion equipment includes bluetooth module, wherein, bluetooth module includes signalling path and voice channel, the shifting
Dynamic terminal controls the intercommunication expansion equipment to carry out data processing by the signalling path of the bluetooth module；The intercommunication extension
Equipment is set up with the mobile terminal by the voice channel of the bluetooth module and communicated to connect, and the mobile terminal passes through wireless
Network connection is to another mobile terminal, and another mobile terminal is extended with another intercommunication expansion equipment by another intercommunication
The bluetooth module of equipment sets up communication connection, realizes remote between the intercommunication expansion equipment and another intercommunication expansion equipment
Cheng Tongxin.
Preferably, the intercommunication expansion equipment also includes：Audio transceiver module, audio frequency process and control module, button mould
Block and display module, wherein, the audio frequency process and control module respectively with the audio transceiver module, key-press module and display
Module is connected.
Preferably, the audio transceiver module includes：Microphone, loudspeaker and amplification drive module, the amplification drive mould
Block is connected with microphone, loudspeaker respectively, for the audio-frequency information of microphone input to be carried out into signal amplification and loudspeaker are will be transmitted to
The voice signal put outside is amplified.
Preferably, the audio frequency process and control module include：Record/playback module, for the audio letter to microphone input
Breath is recorded and exports playback signal to loudspeaker；Audio access module, for the audio-frequency information to be sent to memory module
Preserved, and the audio-frequency information is read from the memory module；Memory module, the number for storing the audio-frequency information
According to.
Preferably, the process that the mobile terminal controls the intercommunication expansion equipment to carry out data processing includes：Control institute
State record/playback module to record to the audio-frequency information of the microphone input, and recording data is sent out by audio access module
The memory module is delivered to be stored；The audio access module is controlled to read the recording number stored in the memory module
According to, and the recording data is sent to described record/playback module, the record/playback module sends playback to the loudspeaker and believed
Number and the recording data；The audio frequency process and control module is controlled to receive the audio number transmitted from another intercommunication expansion equipment
According to sending playback signal and the voice data to the loudspeaker, and the voice data is sent by audio access module
Stored to described memory module.
Preferably, the key-press module includes：PTT buttons, playback button, repeating transmission button.
Preferably, the display module includes：Status indicator lamp, the state for indicating current intercommunication expansion equipment.
Preferably, in addition to：Background service system, the mobile terminal is connected to the background service by wireless network
System, the background service system includes：Management server, login and forwarding server and database server, wherein, it is described
Management server, the configuration management for the background server system；The login and forwarding server, for completing in real time
The mobile terminal of user is logged in, and receives and send communication intercommunication data；The database server, for the background server
The data storage of system.
Preferably, the intercommunication expansion equipment also includes：Wireless module, is connected with the audio frequency process and control module,
To receive the voice data of another intercommunication expansion equipment, and by the delivery of audio data to the audio frequency process and control mould
Block, the audio frequency process and control module are exported the delivery of audio data to the loudspeaker；Also, at the audio
The audio-frequency information that reason and control module are transmitted microphone by the wireless module is as delivery of audio data to another intercommunication
Expansion equipment.
Preferably, the intercommunication expansion equipment also includes：Audio amplification block, is connected with the loudspeaker, for by described in
The audio of loudspeaker output is amplified.
Technical scheme of the embodiment of the present invention, has the following advantages that：
The embodiment of the present invention passes through bluetooth module by adding bluetooth module, intercommunication expansion equipment in intercommunication expansion equipment
Set up and be connected with mobile terminal, multiple intercommunication expansion equipments can be connected to wireless network by the mobile terminal each connected respectively
Network, each mobile terminal realizes communication each other by the wireless network, and to pass through between each intercommunication expansion equipment
The wireless network realizes telecommunication, solves the problem of lacking networking function between intercommunication expansion equipment in the prior art.It is real
The function of completing traditional public network intercom at lower cost based on existing mobile terminal is showed, before wide market application
Scape.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart that the intercommunication of group of the embodiment of the present invention extends system；
Fig. 2 is the structural representation for the intercommunication expansion equipment that the intercommunication of group of the embodiment of the present invention extends system；
Fig. 3 is the structural representation of intercommunication expansion equipment audio transceiver module of the embodiment of the present invention；
Fig. 4 is the structural representation of intercommunication expansion equipment audio frequency process of the embodiment of the present invention and control module；
Fig. 5 is the structural representation of intercommunication expansion equipment key-press module of the embodiment of the present invention；
Fig. 6 is the structural representation of intercommunication expansion equipment display module of the embodiment of the present invention；
Fig. 7 is another structure chart that the intercommunication of group of the embodiment of the present invention extends system.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation
Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, term " " center ", " on ", " under ", "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outer " be based on orientation shown in the drawings or position relationship, merely to
Be easy to the description present invention and simplify description, rather than indicate or imply signified device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.In addition, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to illustrate, unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or be integrally connected；Can
To be mechanical connection or electrical connection；Can be joined directly together, can also be indirectly connected to by intermediary, can be with
It is the connection of two element internals, can is wireless connection or wired connection.For one of ordinary skill in the art
For, the concrete meaning of above-mentioned term in the present invention can be understood with concrete condition.
As long as in addition, technical characteristic involved in invention described below different embodiments non-structure each other
It can just be combined with each other into conflict.
The embodiment of the present invention provides a kind of group intercommunication extension system based on mobile terminal, including：Multiple intercommunication extensions
Equipment and multiple mobile terminals, the intercommunication expansion equipment are corresponded with mobile terminal, wherein, the intercommunication expansion equipment bag
Bluetooth module is included, wherein, bluetooth module includes signalling path and voice channel, and the mobile terminal passes through the bluetooth module
Signalling path controls the intercommunication expansion equipment to carry out data processing；The language that the intercommunication expansion equipment passes through the bluetooth module
Sound passage is set up with the mobile terminal and communicated to connect, and the mobile terminal is connected to another mobile terminal by wireless network,
Another mobile terminal is set up by the bluetooth module of another intercommunication expansion equipment with another intercommunication expansion equipment and communicated
Connection, realizes the telecommunication between the intercommunication expansion equipment and another intercommunication expansion equipment.
By said structure, in the embodiment of the present invention, the movement that multiple intercommunication expansion equipments can respectively by each connecting
Terminal is connected to wireless network, and each mobile terminal realizes communication each other by the wireless network, and each intercommunication is expanded
Telecommunication can be realized by the wireless network between exhibition equipment, solve the problem of lacking networking between intercommunication expansion equipment.
Below in conjunction with specific example, the group intercommunication extension system to the embodiment of the present invention is described further.
Specifically, Fig. 1 is the structure chart that the intercommunication of group of the embodiment of the present invention extends system, as shown in figure 1, the group intercommunication
Extension system includes：Multiple intercommunication expansion equipments, including：Intercommunication expansion equipment 10, intercommunication expansion equipment 40, intercommunication expansion equipment
60 etc., and multiple mobile terminals, including：Mobile terminal 20, mobile terminal 50 and mobile terminal 70 etc., the intercommunication expansion equipment 10
Connection corresponding with mobile terminal 20, the connection corresponding with mobile terminal 50 of intercommunication expansion equipment 40, intercommunication expansion equipment 60 and movement
The correspondence of terminal 70 is connected, i.e., each intercommunication expansion equipment connects one to one with mobile terminal.
Fig. 2 is the structural representation for the intercommunication expansion equipment that the intercommunication of group of the embodiment of the present invention extends system, such as Fig. 2 institutes
Show, the intercommunication expansion equipment 10 includes bluetooth module 101, the bluetooth module 101 includes signalling path and voice channel.It is mobile whole
End 20 controls the intercommunication expansion equipment 10 to carry out data processing by the signalling path of bluetooth module 101.
The intercommunication expansion equipment 10 is set up with mobile terminal 20 by the voice channel of bluetooth module 101 and communicated to connect, and moves
Dynamic terminal 20 is connected to mobile terminal 50 by wireless network 30, and the mobile terminal 50 passes through the intercommunication with intercommunication expansion equipment 40
The bluetooth module 401 of expansion equipment 40 sets up communication connection, you can realize intercommunication expansion equipment 10 and intercommunication expansion equipment 40 it
Between telecommunication, carry out the basic functions such as real-time intercommunication.
In one alternate embodiment, intercommunication expansion equipment 10 is set up with mobile terminal 20 by bluetooth module 101 and communicated
Connection, mobile terminal 20 is connected to mobile terminal 70 by wireless network 30, and the mobile terminal 70 leads to intercommunication expansion equipment 60
The bluetooth module 601 for crossing the intercommunication expansion equipment 60 sets up communication connection, you can realize that intercommunication expansion equipment 10 extends with intercommunication
Telecommunication between equipment 60, carries out the basic functions such as real-time intercommunication.
In another alternative embodiment, intercommunication expansion equipment 40 sets up logical by bluetooth module 401 and mobile terminal 50
Letter connection, mobile terminal 50 is connected to mobile terminal 70 by wireless network 30, the mobile terminal 70 and intercommunication expansion equipment 60
Communication connection is set up by the bluetooth module 601 of the intercommunication expansion equipment 60, you can realize that intercommunication expansion equipment 40 expands with intercommunication
The telecommunication between equipment 60 is opened up, the basic functions such as real-time intercommunication are carried out.
In actual applications, it is also that each other long-range logical is realized by said process between other intercommunication expansion equipments
Letter.
Preferably, above-mentioned wireless network 30 can be the wireless networks such as WiFi, mobile phone GPRS network (3G, 4G etc.).On
The bluetooth module stated can set up signalling path by the version of bluetooth 4.0, realize above-mentioned control, query function；Pass through indigo plant
The version of tooth 2.1 sets up voice channel, realizes communication between intercommunication expansion equipment and mobile terminal or by bluetooth
4.0 versions realize the communication between handheld device and mobile terminal, different from traditional version of bluetooth 2.0, the voice in communication
The finite bandwidth of bluetooth 4.0 can also be solved the problems, such as using powerful pressure solution.But the present invention is not limited thereto.
It can be seen that, in the group intercommunication extension system of the embodiment of the present invention, by mobile terminal by the intercommunication being attached thereto
Expansion equipment accesses wireless network, can make to realize telecommunication by wireless network between multiple intercommunication expansion equipments, compare
In situation about only being communicated by the aerial signal of intercommunication expansion equipment, its coverage is wider, is more widely applied.
In one alternate embodiment, intercommunication expansion equipment 10 sends speech audio information to intercommunication expansion equipment 40, and
Intercommunication expansion equipment 40 does not connect corresponding mobile terminal 50 also, then intercommunication expansion equipment 10 will be the speech audio of transmission
Information sends into mobile terminal 50 and kept in, and to user can be pointed out (information alert or sound by mobile terminal 50
Sound prompting etc.), it is connected with pointing out user to set up intercommunication expansion equipment 40 with mobile terminal 50, treats that intercommunication expansion equipment 40 passes through
The bluetooth module 401 of itself is connected to after mobile terminal 50, you can receive the speech audio letter of the transmission of intercommunication expansion equipment 10
Breath.
Preferably, each intercommunication expansion equipment (intercommunication expansion equipment 10, intercommunication expansion equipment 40, intercommunication expansion equipment 60
Deng) in may each comprise：Audio transceiver module 102, audio frequency process and control module 103, key-press module 104 and display module 105,
Wherein, audio frequency process and control module 103 are connected with audio transceiver module 102, key-press module 104 and display module 105 respectively.
Fig. 3 is the structural representation of intercommunication expansion equipment audio transceiver module of the embodiment of the present invention, as shown in figure 3, it is preferred that
Ground, audio transceiver module 102 includes：Microphone 1021, loudspeaker 1022 and amplification drive module 1023, the amplification drive module
1023 are connected with microphone 1021, loudspeaker 1022 respectively, and the audio of the audio-frequency information formation for microphone 1021 to be inputted is believed
The voice signal put outside loudspeaker 1022 number is amplified and will be transmitted to be amplified.
Fig. 4 is the structural representation of intercommunication expansion equipment audio frequency process of the embodiment of the present invention and control module, such as Fig. 4 institutes
Show, it is preferable that audio frequency process and control module 103 include：Record/playback module 1031, for the audio inputted to microphone 1021
Information is recorded, and exports playback signal to loudspeaker 1022；Audio access module 1032, for the audio-frequency information to be sent
Preserved to memory module 1033, and audio-frequency information is read from memory module 1033；Memory module, for storing audio letter
The data of breath.
Preferably, the process that mobile terminal controls 20 intercommunication expansion equipments 10 to carry out data processing includes：Control record/playback
The audio-frequency information that module 1031 is inputted to microphone 1021 is recorded, and recording data is sent out by audio access module 1032
Memory module 1033 is delivered to be stored；Control audio access module 1032 reads the recording number stored in memory module 1033
According to, and recording data is sent to record/playback module 1031, record/playback module 1031 sends playback signal to loudspeaker 1022 and should
Recording data；Control audio frequency process and control module 103 receive from other intercommunication expansion equipments (such as intercommunication expansion equipment 40,
Intercommunication expansion equipment 60 etc.)) voice data of transmission, send playback signal and the voice data to loudspeaker 1022, and by the sound
Frequency evidence is sent to memory module 1033 by audio access module 1032 to be stored.
Fig. 5 is the structural representation of intercommunication expansion equipment key-press module of the embodiment of the present invention, as shown in Figure 5, it is preferable that press
Key module 104 includes：PTT (push to talk, push-to-talk) button 1041, playback button 1042, repeating transmission button 1043.It is real
In the application of border, user presses PTT buttons 1041, to inputting audio-frequency information to microphone 1021.When user wants to listen to storage
During recording, you can press playback button 1042, triggering record/playback module 1031 sends playback signal and recording number to loudspeaker 1022
According to, and play the recording data by loudspeaker 1022.When sender does not receive the response of another intercommunication expansion equipment, then weight is pressed
Button 1043 is sent out, recording data before is sent to another intercommunication expansion equipment again.
Fig. 6 is the structural representation of intercommunication expansion equipment display module of the embodiment of the present invention, as shown in Figure 6, it is preferable that aobvious
Show that module 105 includes：Status indicator lamp 1051, the state for indicating current intercommunication expansion equipment, can point out Bluetooth function
Whether open, the state such as whether intercommunication expansion equipment power supply is opened.
Fig. 7 is another structure chart that the intercommunication of group of the embodiment of the present invention extends system, as shown in Figure 7, it is preferable that group pair
Say that extension system also includes：Background service system 80, each mobile terminal (mobile terminal 20, mobile terminal 50, mobile terminal 70
Deng) background service system 80 is connected to by wireless network 30, background service system 80 includes：Management server 801, after being used for
The configuration management of platform server system, can be the management to user type, Group structure etc.；Log in and forwarding server 802,
Mobile terminal for completing user in real time is logged in, and receives and send communication intercommunication data；Database server 803, after being used for
The data storage of platform server system.
Preferably, each intercommunication expansion equipment (intercommunication expansion equipment 10, intercommunication expansion equipment 40, intercommunication expansion equipment 60
Deng) also include：Wireless module 107, is connected with audio frequency process and control module 103, to receive other intercommunication expansion equipment (intercommunications
Expansion equipment 40, intercommunication expansion equipment 60 etc.) voice data, and by the delivery of audio data to audio frequency process and control module
103, audio frequency process and control module 103 are exported the delivery of audio data to loudspeaker 1022；Also, audio frequency process and control
The audio-frequency information that molding block 103 is transmitted microphone 1021 by wireless module 107 is as delivery of audio data to other intercommunications
Expansion equipment (intercommunication expansion equipment 40, intercommunication expansion equipment 60 etc.).
Preferably, each intercommunication expansion equipment (intercommunication expansion equipment 10, intercommunication expansion equipment 40, intercommunication expansion equipment 60
Deng) also include：Audio amplification block 106, is connected with loudspeaker 1022, and the audio for loudspeaker 1022 to be exported is amplified,
It can be connected with independent megaphone (being not limited to monophonic loudspeaker), for the audio of output to be amplified, reach bigger
Amplifying effect.
By said process, the telecommunication between intercommunication expansion equipment is realized, intercommunication expansion equipment is solved and lacks
The problem of networking function, make intercommunication expansion equipment more practicality.Realize complete at lower cost based on existing mobile terminal
Into the function of traditional public network intercom, different from traditional talk back equipment, while coordinating PTT buttons to realize traditional public network intercommunication
The function of machine, with wide market application foreground.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of change or
Change.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (10)
1. a kind of group intercommunication extension system based on mobile terminal, it is characterised in that including：Multiple intercommunication expansion equipments and many
Individual mobile terminal, the intercommunication expansion equipment is corresponded with mobile terminal, wherein,
The intercommunication expansion equipment includes bluetooth module, wherein, bluetooth module includes signalling path and voice channel, the movement
Terminal controls the intercommunication expansion equipment to carry out data processing by the signalling path of the bluetooth module；
The intercommunication expansion equipment is set up with the mobile terminal by the voice channel of the bluetooth module and communicated to connect, described
Mobile terminal is connected to another mobile terminal by wireless network, and another mobile terminal passes through with another intercommunication expansion equipment
The bluetooth module of another intercommunication expansion equipment sets up communication connection, realizes the intercommunication expansion equipment and another intercommunication
Telecommunication between expansion equipment.
2. group intercommunication according to claim 1 extends system, it is characterised in that the intercommunication expansion equipment also includes：
Audio transceiver module, audio frequency process and control module, key-press module and display module, wherein,
The audio frequency process and control module are connected with the audio transceiver module, key-press module and display module respectively.
3. group intercommunication according to claim 2 extends system, it is characterised in that the audio transceiver module includes：
Microphone, loudspeaker and amplification drive module, the amplification drive module is connected with microphone, loudspeaker respectively, for by wheat
The audio-frequency information of gram wind input carries out signal amplification and will be transmitted to the voice signal put outside loudspeaker being amplified.
4. group intercommunication according to claim 2 extends system, it is characterised in that audio frequency process and the control module bag
Include：
Record/playback module, is recorded for the audio-frequency information to microphone input and exports playback signal to loudspeaker；
Audio access module, is preserved for the audio-frequency information to be sent to memory module, and from the memory module
Read the audio-frequency information；
Memory module, the data for storing the audio-frequency information.
5. group intercommunication according to claim 4 extends system, it is characterised in that the mobile terminal controls the intercommunication
The process that expansion equipment carries out data processing includes：
Control the record/playback module to record the audio-frequency information of the microphone input, and recording data is passed through into audio
Access module sends to the memory module and stored；
Control the audio access module to read the recording data stored in the memory module, and the recording data is sent
To described record/playback module, the record/playback module sends playback signal and the recording data to the loudspeaker；
The audio frequency process and control module is controlled to receive the voice data transmitted from another intercommunication expansion equipment, to the loudspeaker
Playback signal and the voice data are sent, and the voice data is sent to described storage mould by audio access module
Block is stored.
6. group intercommunication according to claim 2 extends system, it is characterised in that the key-press module includes：
PTT buttons, playback button, repeating transmission button.
7. group intercommunication according to claim 2 extends system, it is characterised in that the display module includes：
Status indicator lamp, the state for indicating current intercommunication expansion equipment.
8. group intercommunication according to claim 1 extends system, it is characterised in that also include：
Background service system, the mobile terminal is connected to the background service system, the background service by wireless network
System includes：Management server, login and forwarding server and database server, wherein,
The management server, the configuration management for the background server system；
The login and forwarding server, the mobile terminal for completing user in real time are logged in, and receive and send communication intercommunication number
According to；
The database server, the data storage for the background server system.
9. group intercommunication according to claim 3 extends system, it is characterised in that the intercommunication expansion equipment also includes：
Wireless module, is connected with the audio frequency process and control module, to receive the voice data of another intercommunication expansion equipment, and
By the delivery of audio data to the audio frequency process and control module, the audio frequency process and control module are by the audio number
Exported according to the loudspeaker are passed to；
Also, the audio-frequency information that the audio frequency process and control module are transmitted microphone by the wireless module is used as audio
Data transfer gives another intercommunication expansion equipment.
10. group intercommunication according to claim 3 extends system, it is characterised in that the intercommunication expansion equipment also includes：
Audio amplification block, is connected with the loudspeaker, and the audio for the loudspeaker to be exported is amplified.
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| CN201710516132.3A CN107249175A (en) | 2017-06-29 | 2017-06-29 | A kind of group intercommunication extension system based on mobile terminal |
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| CN201710516132.3A CN107249175A (en) | 2017-06-29 | 2017-06-29 | A kind of group intercommunication extension system based on mobile terminal |
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| CN109391285A (en) * | 2018-10-24 | 2019-02-26 | 杭州帕森科技有限公司 | A kind of multiband police service converged communication system |
| CN111245980A (en) * | 2018-11-29 | 2020-06-05 | Oppo广东移动通信有限公司 | Split type mobile terminal and voice control method thereof |
| CN111245980B (en) * | 2018-11-29 | 2022-01-18 | Oppo广东移动通信有限公司 | Split type mobile terminal and voice control method thereof |
| CN111246401A (en) * | 2020-01-14 | 2020-06-05 | 西安极蜂天下信息科技有限公司 | Frequency changing method and device |
| CN111446981A (en) * | 2020-04-02 | 2020-07-24 | 深圳市灵猫智能有限公司 | Bluetooth wireless intercom system |
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Application publication date: 20171013 |