CN203261347U - Multichannel wireless audio transmission system - Google Patents
Multichannel wireless audio transmission system Download PDFInfo
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- CN203261347U CN203261347U CN 201320233756 CN201320233756U CN203261347U CN 203261347 U CN203261347 U CN 203261347U CN 201320233756 CN201320233756 CN 201320233756 CN 201320233756 U CN201320233756 U CN 201320233756U CN 203261347 U CN203261347 U CN 203261347U
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Abstract
The utility model discloses a multichannel wireless audio transmission system. The system comprises a transmission terminal and at least one reception terminal. The transmission terminal includes a first input module, a second input module, a first main controller and a wireless signal transmitter. An output terminal of the first input module is connected with a first input terminal of the first main controller. An output terminal of the second input module is connected with a second input terminal of the first main controller. An output terminal of the first main controller is connected with an input terminal of the wireless signal transmitter. The wireless signal transmitter is in wireless connection with the reception terminal. According to the utility model, the number of the reception terminals can be adjusted according to the actual conditions, so that the use range of the wireless audio transmission system is broadened; and the reception terminal includes a first input module and a second input module, such that two audio signals can be transmitted simultaneously, saving energy and increasing the transmission efficiency. The multichannel wireless audio transmission system can be widely used in the field of wireless audio transmission.
Description
Technical field
The utility model relates to the audio transmission field, especially a kind of channel wireless radio multi audio transmission system.
Background technology
Explanation of nouns:
RF: radio signal.
Bluetooth: the radiotechnics of a kind of support equipment short haul connection (in the general 10m);
The I2S bus: PHILIPS Co. is a kind of bus standard that the audio data transmission between the digital audio-frequency apparatus is formulated;
SPI: Serial Peripheral Interface is a kind of synchronous serial communication mode that Motorola Inc. releases.
In recent years, wireless technology is more and more paid close attention in the application in audio transmission field, and corresponding ANTENN AUDIO product is also more and more.Present ANTENN AUDIO product mainly contains following dual mode when transmitting: Bluetooth transmission and connection-oriented RF transmission.But these two kinds of transmission meanss all belong to connection-oriented working method, all can only connect the receiving equipment of limited number amount, generally all can only connect one or two receiving equipment and can't accomplish to connect simultaneously a plurality of receiving equipments, and the scope of application is less.And existing ANTENN AUDIO product generally can only the transmission of one line audio signal, and the efficient of transmission is lower.
The utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model is: provide a kind of scope of application the large and much higher passage wireless audio transmission system of efficiency of transmission.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of channel wireless radio multi audio transmission system, comprise a launch terminal and at least one receiving terminal, described launch terminal comprises the first input module, the second input module, the first main controller and wireless signal transmitter, the output of described the first input module is connected with the first input end of the first main controller, the output of described the second input module is connected with the second input of the first main controller, the output of described the first main controller is connected with the input of wireless signal transmitter, described wireless signal transmitter and receiving terminal wireless connections.
Further, described launch terminal also comprises the first analog to digital converter, the second analog to digital converter, modulator and the first power module, the output of described the first input module is connected by the first analog to digital converter and then with the first input end of the first master controller, the output of described the second input module is connected by the second analog to digital converter and then with the second input of the first master controller, the output of described the first master controller is connected by modulator and then with the input of wireless signal transmitter, and described the first power module is respectively the first analog to digital converter, the second analog to digital converter, the first master controller and modulator power supply.
Further, described receiving terminal comprise the second source module and with the wireless signal receiver of described wireless signal transmitter wireless connections, the output of described wireless signal receiver is connected with demodulator, the second main controller, digital to analog converter and output module in turn, and described second source module is respectively demodulator, the second main controller and digital to analog converter power supply.
Further, described receiving terminal also comprises the channel selecting key, and the output of described channel selecting key is connected with the input of the second main controller.
Further, between described the first main controller and the first analog to digital converter, all be connected by I2S bus or spi bus between the first main controller and the second analog to digital converter and between the second main controller and the digital to analog converter.
Further, described the first analog to digital converter, the second analog to digital converter and digital to analog converter all adopt the WM8988 chip.
Further, described wireless signal transmitter is the 2.4GHz wireless signal transmitter.
The beneficial effects of the utility model are: comprise a launch terminal and have a receiving terminal with described launch terminal wireless connections at least, the quantity of receiving terminal can be regulated according to actual conditions, so that the quantity of receiving equipment no longer is restricted, enlarged the scope of application of wireless audio transmission system; Simultaneously launch terminal comprises the first input module and the second input module, and the transmitting two paths audio signal can only the transmission of one line audio signal be compared with prior art simultaneously, more can economize on resources and improves efficiency of transmission.Further, receiving terminal comprises the channel selecting key, can make the user select one tunnel audio signal to export by button, and is more practical and convenient.
Description of drawings
The utility model is described in further detail below in conjunction with Figure of description and embodiment.
Fig. 1 is the functional block diagram of a kind of channel wireless radio multi audio transmission system of the utility model;
Fig. 2 is the structured flowchart of the utility model launch terminal;
Fig. 3 is the structured flowchart of the utility model receiving terminal.
Embodiment
With reference to Fig. 1, a kind of channel wireless radio multi audio transmission system of the utility model, comprise a launch terminal and at least one receiving terminal, described launch terminal comprises the first input module, the second input module, the first main controller and wireless signal transmitter, the output of described the first input module is connected with the first input end of the first main controller, the output of described the second input module is connected with the second input of the first main controller, the output of described the first main controller is connected with the input of wireless signal transmitter, described wireless signal transmitter and receiving terminal wireless connections.
Wherein, launch terminal is used for the two-way simulated audio signal of input is launched after the processing such as analog-to-digital conversion and modulation;
The first input module and the second input module are used for input two-way audio signal;
The first master controller is used for the two-way audio signal of input is carried out the processing such as mixing, volume adjusting and audio processing, thus operating state and the workflow of control receiving terminal;
Wireless signal transmitter, the audio signal after being used for processing is launched;
Receiving terminal, the launch terminal audio signal that is used for receiving directly drives earphone and is reduced to sound or exports the rear class audio frequency amplifier to after the processing such as solution mediation digital-to-analogue conversion.
The utility model comprises that a launch terminal and n(n are the integer more than or equal to 1) individual receiving terminal, the quantity of receiving terminal is unrestricted, can increase according to actual needs or reduce, the quantity that is receiving equipment can be adjusted according to actual conditions, has enlarged the scope of application of wireless audio transmission system.Simultaneously launch terminal comprises the first input module and the second input module, and the transmitting two paths audio signal can only the transmission of one line audio signal be compared with prior art simultaneously, more can economize on resources and improves efficiency of transmission.
With reference to Fig. 2, be further used as preferred embodiment, described launch terminal also comprises the first analog to digital converter, the second analog to digital converter, modulator and the first power module, the output of described the first input module is connected by the first analog to digital converter and then with the first input end of the first master controller, the output of described the second input module is connected by the second analog to digital converter and then with the second input of the first master controller, the output of described the first master controller is connected by modulator and then with the input of wireless signal transmitter, and described the first power module is respectively the first analog to digital converter, the second analog to digital converter, the first master controller and modulator power supply.
Wherein, the first input module and the second input module input two-way simulated audio signal; The first analog to digital converter and the second analog to digital converter are used for the two-way simulated audio signal of input is converted to the two-way digital audio and video signals;
The first master controller is used for the digital audio and video signals after the conversion is carried out the processing such as mixing, volume adjusting and audio processing, thereby controls operating state and the workflow of each module in the receiving terminal;
Modulator is used for digital audio and video signals after treatment is modulated to the wireless digital audio signal;
The first power module is used to the modules power supply of receiving terminal;
Wireless signal transmitter can send to receiving terminal with the wireless digital audio signal after the modulation.
With reference to Fig. 3, be further used as preferred embodiment, described receiving terminal comprise the second source module and with the wireless signal receiver of described wireless signal transmitter wireless connections, the output of described wireless signal receiver is connected with demodulator, the second main controller, digital to analog converter and output module in turn, and described second source module is respectively demodulator, the second main controller and digital to analog converter power supply.
Wherein, wireless signal receiver is used for receiving the wireless digital audio signal that wireless signal transmitter is launched;
Demodulator, the wireless digital audio signal that is used for receiving is reduced to digital audio and video signals;
The second main controller is used for the digital audio and video signals after the reduction is carried out the processing such as channel screen, thus operating state and the workflow of each module of control receiving terminal;
Digital to analog converter, the digital audio and video signals after being used for processing is converted to simulated audio signal;
Output module is used for simulated audio signal after the output conversion, thereby makes the signal of output directly drive also original sound or as the input signal of rear class audio frequency amplifier of earphone;
The second source module is used to the modules power supply of receiving terminal.
With reference to Fig. 3, be further used as preferred embodiment, described receiving terminal also comprises the channel selecting key, the output of described channel selecting key is connected with the input of the second main controller.
Because the signal data that receives has comprised signal (the being two paths of signals) data of two passages, and the audio signal data of final output only has the data of a passage, so in receiving terminal, need by the second main controller data to be screened, thereby filter out useful channel data.When specific implementation, this screening function can be realized by the external channel selecting key of an I/O mouth of the second main controller.The user namely can make things convenient for by this button and inform that quickly the second main controller should select the data of which passage.
Be further used as preferred embodiment, all be connected by I2S bus or spi bus between described the first main controller and the first analog to digital converter, between the first main controller and the second analog to digital converter and between the second main controller and the digital to analog converter.
Be further used as preferred embodiment, described the first analog to digital converter, the second analog to digital converter and digital to analog converter all adopt the WM8988 chip.
In the utility model, digital to analog converter and modulus conversion chip have all been selected the WM8988 chip, the WM8988 chip is a low-power consumption and high-quality stereo coding/decoding device, be exclusively used in the design portable digital audio-frequency apparatus, has very outstanding audio frequency effect, the slewing distortion degree is little, can guarantee to be equivalent to the audio quality of MP3.
Be further used as preferred embodiment, described wireless signal transmitter is the 2.4GHz wireless signal transmitter.
Because data are not had verification scheme, native system guarantees the accuracy rate of transfer of data by increasing transmitting power.Therefore, line signal projector of the present utility model is selected this high-power emission of 2.4GHz.
More than be that better enforcement of the present utility model is specified, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art make all equivalent variations or replacement also can doing under the prerequisite of the utility model spirit, the distortion that these are equal to or replace all is included in the application's claim limited range.
Claims (7)
1. channel wireless radio multi audio transmission system, it is characterized in that: comprise a launch terminal and at least one receiving terminal, described launch terminal comprises the first input module, the second input module, the first main controller and wireless signal transmitter, the output of described the first input module is connected with the first input end of the first main controller, the output of described the second input module is connected with the second input of the first main controller, the output of described the first main controller is connected with the input of wireless signal transmitter, described wireless signal transmitter and receiving terminal wireless connections.
2. a kind of channel wireless radio multi audio transmission system according to claim 1, it is characterized in that: described launch terminal also comprises the first analog to digital converter, the second analog to digital converter, modulator and the first power module, the output of described the first input module is connected by the first analog to digital converter and then with the first input end of the first master controller, the output of described the second input module is connected by the second analog to digital converter and then with the second input of the first master controller, the output of described the first master controller is connected by modulator and then with the input of wireless signal transmitter, and described the first power module is respectively the first analog to digital converter, the second analog to digital converter, the first master controller and modulator power supply.
3. a kind of channel wireless radio multi audio transmission system according to claim 2, it is characterized in that: described receiving terminal comprise the second source module and with the wireless signal receiver of described wireless signal transmitter wireless connections, the output of described wireless signal receiver is connected with demodulator, the second main controller, digital to analog converter and output module in turn, and described second source module is respectively demodulator, the second main controller and digital to analog converter power supply.
4. a kind of channel wireless radio multi audio transmission system according to claim 3, it is characterized in that: described receiving terminal also comprises the channel selecting key, the output of described channel selecting key is connected with the input of the second main controller.
5. it is characterized in that according to claim 3 or 4 described a kind of channel wireless radio multi audio transmission systems: all be connected by I2S bus or spi bus between described the first main controller and the first analog to digital converter, between the first main controller and the second analog to digital converter and between the second main controller and the digital to analog converter.
6. according to claim 3 or 4 described a kind of channel wireless radio multi audio transmission systems, it is characterized in that: described the first analog to digital converter, the second analog to digital converter and digital to analog converter all adopt the WM8988 chip.
7. each described a kind of channel wireless radio multi audio transmission system according to claim 1-4, it is characterized in that: described wireless signal transmitter is the 2.4GHz wireless signal transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320233756 CN203261347U (en) | 2013-05-02 | 2013-05-02 | Multichannel wireless audio transmission system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320233756 CN203261347U (en) | 2013-05-02 | 2013-05-02 | Multichannel wireless audio transmission system |
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| CN203261347U true CN203261347U (en) | 2013-10-30 |
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| CN 201320233756 Expired - Fee Related CN203261347U (en) | 2013-05-02 | 2013-05-02 | Multichannel wireless audio transmission system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637483A (en) * | 2015-02-03 | 2015-05-20 | 中国电子科技集团公司第五十八研究所 | Multichannel-based low-speed voice coding/decoding system |
| CN106844255A (en) * | 2017-01-23 | 2017-06-13 | 武汉大学 | A kind of I2The device and method that S compatible audio signals mutually turn with multichannel time multiplexing signal |
-
2013
- 2013-05-02 CN CN 201320233756 patent/CN203261347U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104637483A (en) * | 2015-02-03 | 2015-05-20 | 中国电子科技集团公司第五十八研究所 | Multichannel-based low-speed voice coding/decoding system |
| CN106844255A (en) * | 2017-01-23 | 2017-06-13 | 武汉大学 | A kind of I2The device and method that S compatible audio signals mutually turn with multichannel time multiplexing signal |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 510530 Second Floor, Building A5, 11 Kaiyuan Avenue, Science City, Guangzhou High-tech Industrial Development Zone, Guangdong Province Patentee after: Guangzhou Boguan Intelligent Technology Co., Ltd. Address before: 3 building, A5 building, No. 11, Kaiyuan Avenue, Guangzhou Science City, Guangdong, 510530 Patentee before: Guangzhou Bosma Photoelectric Technology Co., Ltd. |
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| CP03 | Change of name, title or address | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20210502 |
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| CF01 | Termination of patent right due to non-payment of annual fee |