CN203933622U - A kind of wireless audio transmission system - Google Patents
A kind of wireless audio transmission system Download PDFInfo
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- CN203933622U CN203933622U CN201420231228.7U CN201420231228U CN203933622U CN 203933622 U CN203933622 U CN 203933622U CN 201420231228 U CN201420231228 U CN 201420231228U CN 203933622 U CN203933622 U CN 203933622U
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Abstract
The utility model discloses a kind of wireless audio transmission system, wireless audio transmission system comprises audio emitter and audio receiver, between audio emitter and audio receiver, by wireless signal passage, be connected, it is characterized in that: audio emitter comprises audio collection module, audio coding module, data memory module, wireless transmitter module and power management module, audio collection module connects audio coding module, audio coding module connection data memory module, data memory module connects wireless transmitter module; Audio receiver comprises wireless receiving module, audio decoder module, audio storage module, audio playing module and power module, wireless receiving module connects audio decoder module, audio decoder module connects audio storage module, and audio storage module connects audio playing module.The utility model has not only improved the practicality of wireless audio transmission system, and has improved quality and the speed of audio transmission, and then reduces transmission cost.
Description
Technical field
The utility model relates to a kind of wireless audio transmission system.
Background technology
Along with the development of embedded technology and network technology in recent years, voice communication obtains a wide range of applications, along with improving constantly of people's living standard, more and more higher to the requirement of real-time of music.
Nowadays, most of audio frequency are all to transmit by wired, and wire transmission not only can affect fail safe, and are subject to the restriction in place, have therefore occurred Bluetooth transmission, WiFi transmission, infrared transmission etc.There are some shortcomings in wireless audio frequency transmission function of the prior art: 1, the speed of audio transmission is unhappy, and owing to transmitting the transmission quality of the Different Effects of medium to audio frequency; 2, the efficiency of long-distance transmissions is lower, and cost is higher; 3, be easily subject to electromagnetic interference to produce noise, and then affect tonequality; 4, the stability of transmission is not high.
Utility model content
The utility model object is to provide for the existing deficiency of prior art a kind of technical scheme of wireless audio transmission system, speed while not only having improved audio transmission and quality, and can realize long-distance transmissions, improved its practicality, strengthen the antijamming capability of audio transmission system, improved the stability of audio transmission.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of wireless audio transmission system, wireless audio transmission system comprises audio emitter and audio receiver, between audio emitter and audio receiver, by wireless signal passage, be connected, it is characterized in that: audio emitter comprises audio collection module, audio coding module, data memory module, wireless transmitter module and power management module, audio collection module connects audio coding module, audio coding module connection data memory module, data memory module connects wireless transmitter module, audio receiver comprises wireless receiving module, audio decoder module, audio storage module, audio playing module and power module, wireless receiving module connects audio decoder module, audio decoder module connects audio storage module, and audio storage module connects audio playing module, power management module has reduced ripple and the noise requirements of external power source, and provide power supply for other modules of inside, audio collection module is carried out filtering and analog-to-digital conversion by external voice signal, convert analog signal to digital signal, then being input to audio coder encodes, by data memory module, store, then after utilizing wireless transmitter module that signal is amplified, pass to the wireless receiving module in audio receiver, transmission speed and the quality of audio frequency have been improved, strengthened its antijamming capability, by audio decoder and storage, arrive audio playing module.
Further, audio collection module comprises audio signal source, prefilter, MCU controller and A/D converter, audio signal source connects prefilter, prefilter connects A/D converter, MCU controller connects respectively prefilter and A/D converter, prefilter filters other waveforms in audio signal source, then under the effect of MCU controller, analog signal is passed to A/D converter, makes analog signal convert digital signal to and store.
Further, wireless transmitter module comprises audio frequency amplifier, modulator, frequency converter, suppressor, duplexer and carrier oscillator, audio frequency amplifier is all connected modulator with carrier oscillator, modulator connects frequency converter, frequency converter connects suppressor, and suppressor connects duplexer, and modulator is modulated into stable high-frequency radio frequency oscillator signal by audio signal, by frequency converter, adjust audio frequency, finally by duplexer, signal is launched.
Further, audio playing module comprises audio signal input end mouth, D/A converter, low pass filter, difference is single-ended, L channel simulation is exported and R channel simulation output, audio signal input end mouth connects D/A converter, D/A converter connects respectively two low pass filters, it is single-ended that low pass filter connects difference, the single-ended L channel that connects respectively of difference is simulated output and R channel simulation output, audio digital signals converts analog signal under D/A converter effect, then by the good audio frequency of filtration output tonequality of low pass filter.
Further, MCU controller adopts 8051 single-chip microcomputers, has the control function more powerful than microprocessor, can improve the stability of audio transmission system simultaneously.
Further, frequency converter adopts SKJ-M frequency converter, has random carrier wave adjustable function.
The utility model, owing to having adopted technique scheme, has following beneficial effect:
Speed and the quality of audio transmission have been improved, increased the distance of transmission, strengthened the antijamming capability of audio transmission system: the utility model is by the MCU controller in audio coding module, improved the stability of audio transmission, modulator, carrier oscillator, frequency converter and suppressor have guaranteed the high-quality transmission of audio frequency, make efficiency of transmission faster, saved the transmission time, reduced cost, can, effectively by the shielding of external interference source, prevent from audio transmission to impact simultaneously.The utility model has not only improved the practicality of wireless audio transmission system, and has improved quality and the speed of audio transmission, and then reduces transmission cost.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail:
Fig. 1 is the system architecture diagram of a kind of wireless audio transmission system of the utility model;
Fig. 2 is the structured flowchart of the utility model sound intermediate frequency acquisition module;
Fig. 3 is the structured flowchart of wireless transmitter module in the utility model;
Fig. 4 is the structured flowchart of the utility model sound intermediate frequency playing module.
Embodiment
As shown in Figures 1 to 4, for a kind of wireless audio transmission system of the utility model, wireless audio transmission system comprises audio emitter and audio receiver, between audio emitter and audio receiver, by wireless signal passage, be connected, audio emitter comprises audio collection module, audio coding module, data memory module, wireless transmitter module and power management module, audio collection module connects audio coding module, audio coding module connection data memory module, data memory module connects wireless transmitter module, audio collection module comprises audio signal source, prefilter, MCU controller and A/D converter, audio signal source connects prefilter, prefilter connects A/D converter, MCU controller connects respectively prefilter and A/D converter, prefilter filters other waveforms in audio signal source, then under the effect of MCU controller, analog signal is passed to A/D converter, make analog signal convert digital signal to and store, MCU controller adopts 8051 single-chip microcomputers, there is the control function more powerful than microprocessor, can improve the stability of audio transmission system simultaneously, wireless transmitter module comprises audio frequency amplifier, modulator, frequency converter, suppressor, duplexer and carrier oscillator, audio frequency amplifier is all connected modulator with carrier oscillator, modulator connects frequency converter, frequency converter connects suppressor, suppressor connects duplexer, modulator is modulated into stable high-frequency radio frequency oscillator signal by audio signal, by frequency converter, adjust audio frequency, finally by duplexer, signal is launched, frequency converter adopts SKJ-M frequency converter, there is random carrier wave adjustable function, audio receiver comprises wireless receiving module, audio decoder module, audio storage module, audio playing module and power module, wireless receiving module connects audio decoder module, audio decoder module connects audio storage module, audio storage module connects audio playing module, audio playing module comprises audio signal input end mouth, D/A converter, low pass filter, difference is single-ended, L channel simulation output and R channel simulation output, audio signal input end mouth connects D/A converter, D/A converter connects respectively two low pass filters, it is single-ended that low pass filter connects difference, the single-ended L channel that connects respectively of difference is simulated output and R channel simulation output, audio digital signals converts analog signal under D/A converter effect, then by the good audio frequency of filtration output tonequality of low pass filter, power management module has reduced ripple and the noise requirements of external power source, and provide power supply for other modules of inside, audio collection module is carried out filtering and analog-to-digital conversion by external voice signal, convert analog signal to digital signal, then being input to audio coder encodes, by data memory module, store, then after utilizing wireless transmitter module that signal is amplified, pass to the wireless receiving module in audio receiver, transmission speed and the quality of audio frequency have been improved, strengthened its antijamming capability, by audio decoder and storage, arrive audio playing module.
Operation principle of the present utility model is as follows: audio signal source carries out filtering by the audio collection module in audio emitter, under the effect of MCU controller, convert analog signal to digital signal, then digital signal transfers is encoded and data storage to audio coding module, then by the audio frequency amplifier in wireless transmitter module, enter modulator, modulator is modulated into stable high-frequency radio frequency oscillator signal by audio signal, by frequency converter, adjust audio frequency, suppressor, by the shielding of external interference source, is finally launched signal by duplexer; Audio signal enters the wireless receiving module in audio receiver by wireless signal passage, then by audio decoder module, decode and store, then be passed to D/A converter and convert digital signal to analog signal, and by the audio frequency of low-pass filtering outputting high quality.
These are only specific embodiment of the utility model, but technical characterictic of the present utility model is not limited to this.Anyly take the utility model as basis, for realizing essentially identical technique effect, done ground simple change, be equal to and replace or modification etc., be all covered by among protection range of the present utility model.
Claims (6)
1. a wireless audio transmission system, described wireless audio transmission system comprises audio emitter and audio receiver, between described audio emitter and described audio receiver, by wireless signal passage, be connected, it is characterized in that: described audio emitter comprises audio collection module, audio coding module, data memory module, wireless transmitter module and power management module, described audio collection module connects described audio coding module, described audio coding module connects described data memory module, and described data memory module connects described wireless transmitter module; Described audio receiver comprises wireless receiving module, audio decoder module, audio storage module, audio playing module and power module, described wireless receiving module connects described audio decoder module, described audio decoder module connects described audio storage module, and described audio storage module connects described audio playing module.
2. a kind of wireless audio transmission system according to claim 1, it is characterized in that: described audio collection module comprises audio signal source, prefilter, MCU controller and A/D converter, described audio signal source connects described prefilter, described prefilter connects described A/D converter, and described MCU controller connects respectively described prefilter and described A/D converter.
3. a kind of wireless audio transmission system according to claim 1, it is characterized in that: described wireless transmitter module comprises audio frequency amplifier, modulator, frequency converter, suppressor, duplexer and carrier oscillator, described audio frequency amplifier is all connected described modulator with described carrier oscillator, described modulator connects described frequency converter, described frequency converter connects described suppressor, and described suppressor connects described duplexer.
4. a kind of wireless audio transmission system according to claim 1, it is characterized in that: described audio playing module comprises audio signal input end mouth, D/A converter, low pass filter, difference is single-ended, L channel simulation is exported and R channel simulation output, described audio signal input end mouth connects described D/A converter, described D/A converter connects respectively two described low pass filters, it is single-ended that described low pass filter connects described difference, and described difference is single-ended connects respectively described L channel simulation output and the simulation of described R channel is exported.
5. a kind of wireless audio transmission system according to claim 2, is characterized in that: described MCU controller adopts 8051 single-chip microcomputers.
6. a kind of wireless audio transmission system according to claim 3, is characterized in that: described frequency converter adopts SKJ-M frequency converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231228.7U CN203933622U (en) | 2014-05-07 | 2014-05-07 | A kind of wireless audio transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420231228.7U CN203933622U (en) | 2014-05-07 | 2014-05-07 | A kind of wireless audio transmission system |
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| Publication Number | Publication Date |
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| CN203933622U true CN203933622U (en) | 2014-11-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420231228.7U Expired - Fee Related CN203933622U (en) | 2014-05-07 | 2014-05-07 | A kind of wireless audio transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411417A (en) * | 2016-06-24 | 2017-02-15 | 南京紫米网络科技有限公司 | Ultrasonic coding and decoding system based on jitter sound wave signals |
| CN114759938A (en) * | 2022-06-15 | 2022-07-15 | 易联科技(深圳)有限公司 | Audio delay processing method and system for public network talkback equipment |
-
2014
- 2014-05-07 CN CN201420231228.7U patent/CN203933622U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411417A (en) * | 2016-06-24 | 2017-02-15 | 南京紫米网络科技有限公司 | Ultrasonic coding and decoding system based on jitter sound wave signals |
| CN106411417B (en) * | 2016-06-24 | 2019-06-25 | 多米袋南京金融信息服务有限公司 | A kind of ultrasonic wave coded system based on trambling acoustic signals |
| CN114759938A (en) * | 2022-06-15 | 2022-07-15 | 易联科技(深圳)有限公司 | Audio delay processing method and system for public network talkback equipment |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141105 Termination date: 20200507 |