CN208608994U - Digital radio broadcast system and transmitter and receiver therein - Google Patents
Digital radio broadcast system and transmitter and receiver therein Download PDFInfo
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- CN208608994U CN208608994U CN201820314763.7U CN201820314763U CN208608994U CN 208608994 U CN208608994 U CN 208608994U CN 201820314763 U CN201820314763 U CN 201820314763U CN 208608994 U CN208608994 U CN 208608994U
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Abstract
This application involves a kind of digital radio broadcast system and transmitter and receivers therein.Transmitter therein includes: audio input component, for receiving external source of audio signals；Audio signal source includes analog audio signal or digital audio and video signals；Decoding chip connects audio input component, for the digital audio and video signals decoding to audio input component, obtains analog audio signal；Transmitting modulation chip；Transmitting modulation chip includes converter, Mixer module and AP module；Wherein, converter is separately connected decoding chip and audio input component, for by the analog audio signal of decoding chip, and/or, the analog audio signal of audio input component is converted into digital audio and video signals；Mixer module, connects converter, and the digital audio and video signals for being converted to converter carry out encryption modulation；AP module connects Mixer module, for emitting the digital audio and video signals of Mixer module encryption modulation in the form of wireless signal.
Description
Technical field
This application involves technical field of electronic communication more particularly to a kind of digital radio broadcast systems and transmitter therein
And receiver.
Background technique
With people live in scope of activities it is increasingly wider, it is indispensable that broadcast system has become people's lives
A part.
In the related technology, broadcast system is divided into wired broadcast system and wireless broadcast system.Wired broadcast system includes: sound
Frequency power amplifier and loudspeaker are connected between power amplifier and loudspeaker using sound wire.Wireless broadcast system includes: work
Make the FM transmitter and receiver in 76~108MHz.Receiver is used for the signal audio signal of receiver/transmitter transmitting.It receives
Wireless transmission is used between machine and transmitter, to transmit audio frequency simulation information, and increases the transmission of subchannel encoded signal, with
Realize remote on-off control.
But in wireless broadcast system, audio frequency simulation information is easy to be disturbed in radio transmission, and receiver holds
It is easily controlled by other FM transmitters and plays sound.
Utility model content
To be overcome the problems, such as present in the relevant technologies at least to a certain extent, the application provides a kind of digital radio broadcast
System and transmitter and receiver therein.
Transmitter in a kind of digital radio broadcast system provided by the embodiments of the present application, comprising:
Audio input component, for receiving external source of audio signals；The audio signal source includes analog audio signal, or
Person's digital audio and video signals；
Decoding chip connects the audio input component, for the digital audio and video signals solution to the audio input component
Code, obtains analog audio signal；
Transmitting modulation chip；Transmitting modulation chip include altium designerAD converter, Mixer module and
AP module；Wherein, the converter is separately connected the decoding chip and the audio input component, is used for the solution
The analog audio signal of code chip, and/or, the analog audio signal of the audio input component is converted into digital audio and video signals；
The Mixer module, connects the converter, and the digital audio and video signals for being converted to the converter add
Close modulation；The AP module connects the Mixer module, the digital audio and video signals for modulating Mixer module encryption
Emitted in the form of wireless signal, so that only the digital audio and video signals by encryption modulation can be successfully decoded simultaneously in intended receivers
It plays.
Preferably, the audio input component includes: one in bluetooth module, USB interface, audio interface and microphone interface
Kind or two or more combinations.
Preferably, the Mixer module is DQPSK digital encryption modulation module.
Preferably, the transmitter further includes antenna.
Receiver in a kind of digital radio broadcast system provided by the embodiments of the present application, including, receive modulation chip；Institute
Stating reception modulation chip includes: receiving module, decoder module and D/A converter；Wherein, the receiving module is for receiving transmitting
The digital audio and video signals that machine is sent；The digital audio and video signals are wireless signal, and the digital audio and video signals are encrypted modulation
Digital audio and video signals；The decoder module connects the receiving module, for the digital audio letter to encrypted modulation
It number is decoded, if successfully decoded, obtains the decoded digital audio and video signals；The D/A converter connects the solution
Code module, for converting analog audio signal for the decoded digital audio and video signals；
Audio playing module connects the D/A converter, for playing the analog audio signal.
Preferably, further include: switch control module, power supply circuit；
The power supply circuit connects the audio playing module by the switch control module, for being the audio
Playing module power supply；
The decoder module connects the switch control module, is also used to when starting decoding and successfully decoded, Xiang Suoshu
Switch control module sends open command, and at the end of decoding unsuccessful or decoding, Xiang Suoshu switch control module, which is sent, to be closed
Close instruction；
The switch control module, for when receiving the open command, control switch to be closed；It is described receiving
When out code, control switch is disconnected.
Preferably, the decoder module is DQPSK demodulator.
Preferably, further including antenna.
A kind of digital radio broadcast system provided by the embodiments of the present application, including at least one receiver and at least one hair
Machine is penetrated, the transmitter is the transmitter as described in any of the above item, and the receiver is for connecing as described in any of the above item
Receipts machine.
Preferably, the frequency range of the wireless signal of the transmitter transmitting is 740-780MHz；
The frequency range of the received wireless signal of receiver is 740-780MHz.
The technical solution that embodiments herein provides can include the following benefits:
Since in the transmitter in wireless broadcast system, no matter the audio signal source of audio input component input is analog audio
Frequency signal or digital audio and video signals, are all emitted with digital audio and video signals, and since digital audio and video signals are in communication process, no
It is easily interfered by extraneous factor, improves the anti-interference of audio signal.Also, transmitter transmitting digital audio and video signals be through
The encryption modulation of Mixer module is crossed, intended receivers can only play the digital audio and video signals that can be successfully decoded, and ensure that other
Transmitter is unable to control receiver and plays sound.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and together with specification it is used to explain the principle of the application.
Fig. 1 is the structural schematic diagram of the transmitter in a kind of digital radio broadcast system shown in an exemplary embodiment；
Fig. 2 is the structural schematic diagram of the receiver in a kind of digital radio broadcast system shown in an exemplary embodiment；
Fig. 3 is a kind of structural schematic diagram of digital radio broadcast system shown in an exemplary embodiment., appended drawing reference:
1- audio input component, 2- decoding chip, 3- transmitting modulation chip, 31-AD converter, 32-Mixer module, 33-
AP module, 4- receive modulation chip, 41- receiving module, 42- decoder module, 43-DA converter, 5- audio playing module, 6- hair
Penetrate machine, 7- receiver.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended
The example of the consistent device and system of some aspects be described in detail in claims, the application.
Fig. 1 is the structural schematic diagram of the transmitter 6 in a kind of digital radio broadcast system shown in an exemplary embodiment.
Referring to Fig.1, the transmitter 6 in a kind of digital radio broadcast system provided by the present application, comprising: audio input component
1, for receiving external source of audio signals；Audio signal source includes analog audio signal or digital audio and video signals；Decoding chip
2, audio input component 1 is connected, for the digital audio and video signals decoding to audio input component 1, obtains analog audio signal；Hair
Penetrate modulation chip 3；Transmitting modulation chip 3 includes analogue data (Altium Designer, AD) converter 31, Mixer module 32
With AP module 33；Wherein, converter 31 are separately connected decoding chip 2 and audio input component 1, for by decoding chip 2
Analog audio signal, and/or, the analog audio signal of audio input component 1 is converted into digital audio and video signals；Mixer module
32, converter 31 is connected, the digital audio and video signals for being converted to converter 31 carry out encryption modulation；Access point
(Access Point, AP) module 33 connects Mixer module 32, for believing the digital audio of the encryption modulation of Mixer module 32
Emit number in the form of wireless signal, so that only the digital audio letter by encryption modulation can be successfully decoded in intended receivers 7
Number and play.
Transmitter 6 in digital radio broadcast system provided by the present application, due to the transmitter 6 in wireless broadcast system
In, no matter the audio signal source that audio input component 1 inputs is analog audio signal or digital audio and video signals, all with digital sound
The transmitting of frequency signal, and since digital audio and video signals are in communication process, it is not easy to be interfered by extraneous factor, improves audio signal
Anti-interference.Also, the digital audio and video signals that transmitter 6 emits are to encrypt to modulate by Mixer module 32, intended recipient
Machine 7 can only play the digital audio and video signals that can be successfully decoded, and ensure that other transmitters are unable to control 7 broadcasting sound of receiver
Sound.
Based on above-mentioned related embodiment, there are many structures of audio input component 1, specifically, audio input component 1 wraps
It includes: the combination of one or more of bluetooth module, USB interface, audio interface and microphone interface.
Wherein, bluetooth module can be established with external smart terminal and be communicated to connect, and such external smart terminal can pass through
Bluetooth module sends digitized audio message to transmitter 6.Correspondingly, intelligent terminal can be mobile phone, apparatus such as computer.
Wherein, general series (Universal Serial Bus, USB) interface can be whole by data line external smart
End, can also be directly connected to USB flash disk, in this way, external smart terminal can be sent by USB interface or audio interface to transmitter 6
Digitized audio message, transmitter 6 can also read the digitized audio message in USB flash disk by USB interface.
Audio interface also can connect external smart terminal, in this way, external smart terminal can also by audio interface to
Transmitter 6 sends digitized audio message.
Microphone interface can be used to connect microphone, in this way, microphone can send analog audio to transmitter 6 by microphone interface
Frequency information.
Based on above-mentioned related embodiment, there are many structures of Mixer module 32, specifically, Mixer module 32 is DQPSK
Digital encryption modulation module.Four phase RPSK relative phase shift keyings (Differential Quadrature Reference Phase
Shift Keying, DQPSK) existing DQPSK technology is utilized in digital encryption modulation module, and the secondary lobe for avoiding signal is inclined
Greatly, the performance of frequency spectrum is improved, requirement of the digital radio broadcast system to modulation technique can be met.
In order to improve the ability that transmitter 6 emits digital audio and video signals, preferably, transmitter 6 further includes antenna.Antenna can
Effectively to enhance the ability that transmitter 6 emits digital audio and video signals, increase the range that transmitter 6 emits digital audio and video signals.
Fig. 2 is the structural schematic diagram of the receiver 7 in a kind of digital radio broadcast system shown in an exemplary embodiment.
Referring to Fig. 2, present invention also provides the receivers 7 in a kind of digital radio broadcast system, comprising: receives modulation core
Piece 4；Receiving modulation chip 4 includes: receiving module 41, decoder module 42 and D/A converter 43；Wherein, receiving module 41 is for connecing
The digital audio and video signals that receiver/transmitter 6 is sent；Digital audio and video signals are wireless signal, and digital audio and video signals are encrypted modulation
Digital audio and video signals；Decoder module 42 connects receiving module 41, for being decoded to the digital audio and video signals of encrypted modulation,
If successfully decoded, decoded digital audio and video signals are obtained；Digital simulation (Designer Altium, DA) converter 43, even
Decoder module 42 is connect, for converting analog audio signal for decoded digital audio and video signals；Audio playing module 5, connection
D/A converter 43, for playing analog audio signal.
Due to the receiver 7 in wireless broadcast system, there is receiving module 41, can receive digital audio and video signals, wirelessly
Audio-frequency information in broadcast system is transmitted in the form of digital audio and video signals, and since digital audio and video signals are in communication process,
It is not easy to be interfered by extraneous factor, improves the anti-interference of audio signal.Also, after receiver 7 receives digital audio and video signals,
Digital audio and video signals are decoded, only the digital audio and video signals of successfully decoded can just be received the broadcasting of machine 7, ensure that and connect
The digital audio that 7, receipts machine can be sent in play system by the transmitter 6 that the digital signal of predetermined manner pair carries out encryption modulation
Signal.
In implementation, receiver 7 can be constantly in energized state, in this way, receiving modulation chip 4 is constantly in work shape
State receives external wireless signal.When the decoder module 42 in reception modulation chip 4 starts decoding and successfully decoded, Xiang Kai
It closes control module and sends open command, switch control module, when receiving open command, control switch is closed, power supply circuit
For the power supply of audio playing module 5.At the end of decoding unsuccessful or decoding, out code is sent to switch control module；Control
System closes the switch；When receiving out code, control switch is disconnected.Power supply circuit stops being that audio playing module 5 is powered.Such as
This setting, because of power supply circuit, only when the decoder module 42 in receiver 7 in reception modulation chip 4 starts to decode and decodes
It is just the power supply of audio playing module 5, and reception modulation 4 power consumption of chip is lower, even if so even if receiver 7 one when success
It is directly in energized state, the whole power consumption that will not cause because energized state is constantly in has biggish increase.
Based on above-mentioned related embodiment, which is characterized in that there are many structures of decoder module 42, specifically can be
DQPSK demodulator.DQPSK demodulator uses existing DQPSK technology, can demodulate and the modulation of DQPSK technology secrecy is utilized
Digital audio and video signals.Digital audio signal encryption is modulated using DQPSK technology, transmits, passes through again after transmission later
DQPSK demodulator demodulates the digital audio and video signals of encryption modulation.This mode it is possible to prevente effectively from signal transmit when
Secondary lobe phenomenon bigger than normal, improves the performance of the frequency spectrum in signals transmission.
In order to improve the ability that receiver 7 receives digital audio and video signals, preferably, receiver 7 further includes antenna.Antenna can
Effectively to enhance the ability that receiver 7 receives digital audio and video signals.
Fig. 3 is a kind of structural schematic diagram of digital radio broadcast system shown in an exemplary embodiment.
Referring to Fig. 3, present invention also provides a kind of digital radio broadcast systems, including at least one receiver 7 and at least
One transmitter 6, transmitter 6 are the transmitter 6 as described in any of the above embodiment, and receiver 7 is such as any of the above embodiment
The receiver 7.
So set, digital radio broadcast system, due in the transmitter 6 in wireless broadcast system, audio input component 1
The audio signal source of input is analog audio signal or digital audio and video signals, is all emitted with digital audio and video signals, and receiver 7 connects
Digital audio and video signals are received, and since digital audio and video signals are in communication process, are not easy to be interfered by extraneous factor, improve audio
The anti-interference of signal.Also, the digital audio and video signals that transmitter 6 emits are to encrypt to modulate by Mixer module 32, target
Receiver 7 can only play the digital audio and video signals that can be successfully decoded, and ensure that receiver 7 will not be controlled by other transmitters 6
Record and broadcast sound reproduction sound.
In the present embodiment, the frequency range for the wireless signal that the transmitter 6 of digital radio broadcast system emits is 740-
780MHz；The frequency range of the received wireless signal of receiver 7 of digital radio broadcast system is 740-780MHz.
It is wide to a kind of digital radio provided by the embodiments of the present application below with reference to the preferred embodiment in the above various embodiments
The system of broadcasting is described in more details:
Digital radio broadcast system in the present embodiment includes a transmitter 6 and multiple receivers 7.Wherein, transmitter 6
It include: audio input component 1, decoding chip 2, transmitting modulation chip 3；Receiver 7 includes: to receive modulation chip 4, audio broadcasting
Module 5, power supply circuit, switch control module.
Wherein, transmitting modulation chip 3 can be BK9520 chip.Receiving modulation chip 4 can be BK9520 chip.
The frequency range for the wireless signal that transmitter 6 emits is 740-780MHz；The received wireless signal of each receiver 7
Frequency range is 740-780MHz.And multiple channels can be divided into the frequency range of 740-780MHz.Preferably, can be divided into
40 channels.Channel refers to the channel of the lesser communication of frequency range.Which channel transfer transmitter 6 can choose through
Wireless signal.That is: the frequency that can choose the wireless signal of transmitting of transmitter 6.Receiver 7 can receive between 740-780MHz
The wireless signal of any channel.It is the letter that corresponding transmitter 6 is sent when receiver 7 receives the wireless signal in a certain channel
Number when, receiver 7 can the automatic fixed reception channel wireless signal.In this way, completing between transmitter 6 and receiver 7
The transmission of wireless signal.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments
Unspecified content may refer to the same or similar content in other embodiments.
Although embodiments herein has been shown and described above, it is to be understood that above-described embodiment is example
Property, it should not be understood as the limitation to the application, those skilled in the art within the scope of application can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. the transmitter in a kind of digital radio broadcast system characterized by comprising
Audio input component, for receiving external source of audio signals；The audio signal source includes analog audio signal, or number
Word audio signal；
Decoding chip connects the audio input component, for the digital audio and video signals decoding to the audio input component, obtains
To analog audio signal；
Transmitting modulation chip；The transmitting modulation chip includes converter, Mixer module and AP module；Wherein, the AD turns
Parallel operation is separately connected the decoding chip and the audio input component, for by the analog audio signal of the decoding chip,
And/or the analog audio signal of the audio input component, it is converted into digital audio and video signals；The Mixer module connects institute
Converter is stated, the digital audio and video signals for being converted to the converter carry out encryption modulation；The AP module, even
The Mixer module is connect, for emitting the digital audio and video signals of Mixer module encryption modulation in the form of wireless signal.
2. the transmitter in digital radio broadcast system according to claim 1, which is characterized in that the audio input group
Part includes: one of bluetooth module, USB interface, audio interface and microphone interface or two or more combinations.
3. the transmitter in digital radio broadcast system according to claim 1, which is characterized in that the Mixer module
For DQPSK digital encryption modulation module.
4. the transmitter in digital radio broadcast system according to claim 1, which is characterized in that the transmitter also wraps
Include antenna.
5. the receiver in a kind of digital radio broadcast system characterized by comprising receive modulation chip；The reception is adjusted
Coremaking piece includes: receiving module, decoder module and D/A converter；Wherein, the receiving module is sent for receiver/transmitter
Digital audio and video signals；The digital audio and video signals are wireless signal, and the digital audio and video signals are the digital sounds of encrypted modulation
Frequency signal；The decoder module connects the receiving module, for solving to the digital audio and video signals of encrypted modulation
Code, if successfully decoded, obtains the decoded digital audio and video signals；The D/A converter connects the decoder module, uses
In converting analog audio signal for the decoded digital audio and video signals；Audio playing module connects the D/A converter,
For playing the analog audio signal.
6. the receiver in digital radio broadcast system according to claim 5, which is characterized in that further include: switch control
Molding block, power supply circuit；
The power supply circuit connects the audio playing module by the switch control module, for playing for the audio
Module for power supply；
The decoder module connects the switch control module, is also used to when starting decoding and successfully decoded, to the switch
Control module sends open command, and at the end of decoding unsuccessful or decoding, Xiang Suoshu switch control module, which sends to close, to be referred to
It enables；
The switch control module, for when receiving the open command, control switch to be closed；Receiving the closing
When instruction, control switch is disconnected.
7. the receiver in digital radio broadcast system according to claim 5, which is characterized in that the decoder module is
DQPSK demodulator.
8. the receiver in digital radio broadcast system according to claim 5, which is characterized in that further include antenna.
9. a kind of digital radio broadcast system, including at least one receiver and at least one transmitter, which is characterized in that described
Transmitter is such as described in any item transmitters of Claims 1 to 4, and the receiver is as described in any one of claim 5~8
Receiver.
10. digital radio broadcast system according to claim 9, which is characterized in that the wireless communication of the transmitter transmitting
Number frequency range be 740-780MHz；The frequency range of the received wireless signal of receiver is 740-780MHz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820314763.7U CN208608994U (en) | 2018-03-07 | 2018-03-07 | Digital radio broadcast system and transmitter and receiver therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820314763.7U CN208608994U (en) | 2018-03-07 | 2018-03-07 | Digital radio broadcast system and transmitter and receiver therein |
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| Publication Number | Publication Date |
|---|---|
| CN208608994U true CN208608994U (en) | 2019-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820314763.7U Expired - Fee Related CN208608994U (en) | 2018-03-07 | 2018-03-07 | Digital radio broadcast system and transmitter and receiver therein |
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| Country | Link |
|---|---|
| CN (1) | CN208608994U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111866543A (en) * | 2020-07-20 | 2020-10-30 | 徐汉阳 | Audio encryption wireless transmission system |
-
2018
- 2018-03-07 CN CN201820314763.7U patent/CN208608994U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111866543A (en) * | 2020-07-20 | 2020-10-30 | 徐汉阳 | Audio encryption wireless transmission system |
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Granted publication date: 20190315 Termination date: 20200307 |