CN214799474U - Noise reduction interphone - Google Patents
Noise reduction interphone Download PDFInfo
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- CN214799474U CN214799474U CN202120531483.3U CN202120531483U CN214799474U CN 214799474 U CN214799474 U CN 214799474U CN 202120531483 U CN202120531483 U CN 202120531483U CN 214799474 U CN214799474 U CN 214799474U
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- vocoder
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- noise reduction
- volume control
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Abstract
The utility model provides a noise reduction interphone, including MIC module, radio frequency receiving module, demodulation unit, first analog switch, vocoder, the IC of making an uproar falls, second analog switch, the modulation unit, volume control unit, audio power amplifier and speaker, radio frequency receiving module is connected with demodulation unit, demodulation unit and MIC module are connected with first analog switch, first analog switch connects the vocoder, first analog switch is used for selecting vocoder and MIC module intercommunication or communicates with demodulation unit, the vocoder is used for realizing the interaction of control command through I2C bus and the IC communication connection of making an uproar falls, the vocoder is used for realizing the interaction of audio data through I2S bus and the IC communication connection of making an uproar, second analog switch and vocoder, modulation unit and volume control unit are connected, second analog switch is used for selecting vocoder and modulation unit intercommunication or communicates with the volume control unit, the audio power amplifier is connected with the volume control unit and the loudspeaker.
Description
Technical Field
The utility model relates to an intercom field, especially an intercom of making an uproar falls.
Background
Background noise is usually generated in wireless communication using a wireless interphone, and when a strong signal is received, the noise is small or even no noise exists, which means that two parties can communicate in a short distance; on the contrary, when a weak signal is received, the noise is very large, and the distance between the two parties is further and further; similarly, the sound signals transmitted during communication are also interfered by noise.
SUMMERY OF THE UTILITY MODEL
The main objective of the utility model is to overcome prior art's shortcoming, provide one kind and can carry out the intercom of making an uproar that falls of falling the noise processing to the sound information of receipt and transmission.
The utility model adopts the following technical scheme:
a noise reduction interphone comprises an MIC module, a radio frequency receiving module, a demodulation unit, a first analog switch, a vocoder, a noise reduction IC, a second analog switch, a modulation unit, a volume control unit, an audio power amplifier and a loudspeaker, the radio frequency receiving module is connected with the demodulating unit, the demodulating unit and the MIC module are connected with the first analog switch, the first analog switch is connected with the vocoder, the first analog switch is used for selecting the vocoder to be communicated with the MIC module or to be communicated with the demodulating unit, the vocoder is used for realizing the interaction of a control instruction through the I2C bus and the communication connection of the noise reduction IC, the vocoder is used for realizing the interaction of audio data through the I2S bus and the communication connection of the noise reduction IC, the second analog switch is connected with the vocoder, the modulating unit and the volume control unit, the second analog switch is used for selecting the vocoder to be communicated with the modulating unit or to be communicated with the volume control unit, and the audio power amplifier is connected with the volume control unit and the loudspeaker.
Further, the model number of the noise reduction IC is IG1202, and the vocoder is NAU88C22 YG.
Further, the first analog switch, the vocoder, the noise reduction IC, and the second analog switch may be integrated as an audio integrated processor.
It can be known from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are: the first analog switch and the second analog switch are used for selecting the signal communication between the input end and the output end of the vocoder, so that the noise reduction IC can reduce the noise of the received sound information or the transmitted sound information, the communication quality of the wireless communication device is improved, and the cost is reduced.
Drawings
Fig. 1 is a schematic overall structure diagram of a first embodiment of the present invention;
fig. 2 is a schematic view of the overall structure of the second embodiment of the present invention.
In the figure: the digital audio amplifier comprises an MIC module, a radio frequency receiving module, a demodulation unit, a first analog switch, a vocoder, a noise reduction IC, a second analog switch, a modulation unit, a volume control unit, an audio power amplifier, a loudspeaker, a bus 12, I2C, an I2S bus 13, and an audio integrated processor, wherein the radio frequency receiving module is 2, the demodulation unit is 3, the first analog switch is 4, the vocoder is 5, the noise reduction IC is 6, the second analog switch is 7, the modulation unit is 8, the volume control unit is 9, the audio power amplifier is 10, the loudspeaker is 11, the bus 12, the I2C bus is 13, the I2S bus 14.
Detailed Description
The present invention will be further described with reference to the following detailed description.
Referring to fig. 1, the utility model provides a noise reduction interphone, including MIC module 1, radio frequency receiving module 2, demodulation unit 3, first analog switch 4, vocoder 5, noise reduction IC6, second analog switch 7, modulation unit 8, volume control unit 9, audio power amplifier 10 and speaker 11.
The first embodiment is as follows:
the radio frequency receiving module 2 is connected with the input end of the demodulating unit 3, the output end of the demodulating unit 3 and the output end of the MIC module 1 are connected with the input end of a first analog switch 4, the output end of the first analog switch 4 is connected with the input end of a vocoder 5, the input end of the first analog switch 4 is used for selecting the input end of the vocoder 5 to be communicated with the MIC module 1 or to be communicated with the demodulating unit 3, the vocoder 5 is in communication connection with a noise reduction IC6 through an I2C bus 12 for realizing the interaction of control instructions, the vocoder 5 is in communication connection with a noise reduction IC6 through an I2S bus 13 for realizing the interaction of audio data, the input end of a second analog switch 7 is connected with the output end of the vocoder 5, the output end of the second analog switch 7 is connected with the input end of a modulating unit 8 and the input end of a volume control unit 9, the second analog switch 7 is used for selecting the output end of the vocoder 5 to be communicated with the modulating unit 8 or to be communicated with the volume control unit 9, the input end of an audio power amplifier 10 is connected with the output end of a volume control unit 9, the output end of the audio power amplifier 10 is connected with the input end of a loudspeaker 11, the model of a noise reduction IC6 is IG1202, and the model of a vocoder is NAU88C22 YG.
Continuing to refer to fig. 1, the utility model discloses can select to carry out the novel noise reduction processing or carry out the noise reduction processing to the sound information that will launch to the sound of receiving, when the sound information that needs to receive carries out the noise reduction processing, first analog switch 4 selects intercommunication demodulation unit 3, second analog switch 7 selects intercommunication volume control unit 9, make vocoder 5 and demodulation unit 3 and volume control unit 9 communicate, radio frequency receiving module 2 receives behind the information and carries vocoder 5 to carry out mode conversion after decompression reduction of demodulation unit 3, and amplify and play through speaker 11 through audio power amplifier 10 after the noise reduction processing of making an uproar IC 6; when the noise reduction processing is needed to be carried out on the transmitted sound information, the first analog switch 4 is selectively communicated with the MIC module 1, the second analog switch 7 is selectively communicated with the modulation unit 8, the vocoder 5 is communicated with the MIC module 1 and the modulation unit 8, the sound information input by the MIC module 1 is subjected to mode conversion of the vocoder 5 and is compressed and transmitted by the modulation unit 8 after the noise reduction processing of the noise reduction IC 6.
Example two:
referring to fig. 2, in contrast to the first embodiment, the second embodiment integrates the first analog switch 4, the vocoder 5, the noise reduction IC6, and the second analog switch 7 into the audio integrated processor 14, and the rest remains unchanged.
The above is only a specific embodiment of the present invention, but the design concept of the present invention is not limited to this, and the present invention is to be used for insubstantial modification of the present invention, which all infringes the protection scope of the present invention.
Claims (3)
1. The utility model provides an intercom of making an uproar falls which characterized in that: comprises an MIC module, a radio frequency receiving module, a demodulation unit, a first analog switch, a vocoder, a noise reduction IC, a second analog switch, a modulation unit, a volume control unit, an audio power amplifier and a loudspeaker, the radio frequency receiving module is connected with the demodulating unit, the demodulating unit and the MIC module are connected with the first analog switch, the first analog switch is connected with the vocoder, the first analog switch is used for selecting the vocoder to be communicated with the MIC module or to be communicated with the demodulating unit, the vocoder is used for realizing the interaction of a control instruction through the I2C bus and the communication connection of the noise reduction IC, the vocoder is used for realizing the interaction of audio data through the I2S bus and the communication connection of the noise reduction IC, the second analog switch is connected with the vocoder, the modulating unit and the volume control unit, the second analog switch is used for selecting the vocoder to be communicated with the modulating unit or to be communicated with the volume control unit, and the audio power amplifier is connected with the volume control unit and the loudspeaker.
2. A noise reducing intercom as in claim 1 wherein: the model number of the noise reduction IC is IG1202, and the vocoder is NAU88C22 YG.
3. A noise reducing intercom as in claim 1 wherein: the first analog switch, vocoder, noise reduction IC, and second analog switch may be integrated as an audio integrated processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120531483.3U CN214799474U (en) | 2021-03-15 | 2021-03-15 | Noise reduction interphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120531483.3U CN214799474U (en) | 2021-03-15 | 2021-03-15 | Noise reduction interphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214799474U true CN214799474U (en) | 2021-11-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120531483.3U Active CN214799474U (en) | 2021-03-15 | 2021-03-15 | Noise reduction interphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214799474U (en) |
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2021
- 2021-03-15 CN CN202120531483.3U patent/CN214799474U/en active Active
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