CN213661610U - Analog interphone - Google Patents
Analog interphone Download PDFInfo
- Publication number
- CN213661610U CN213661610U CN202022829873.7U CN202022829873U CN213661610U CN 213661610 U CN213661610 U CN 213661610U CN 202022829873 U CN202022829873 U CN 202022829873U CN 213661610 U CN213661610 U CN 213661610U
- Authority
- CN
- China
- Prior art keywords
- vocoder
- power amplifier
- audio power
- noise reduction
- radio frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Noise Elimination (AREA)
Abstract
The utility model provides an analog interphone, including the radio frequency receiving element, the demodulation unit, the vocoder, the IC of making an uproar falls, the volume control unit, audio power amplifier and speaker, the radio frequency receiving element is connected with the demodulation unit, the demodulation unit is connected with the vocoder, the vocoder is used for realizing control command's interaction through I2C bus and the IC communication connection of making an uproar that falls, the vocoder is used for realizing audio data's interaction through I2S bus and the IC communication connection of making an uproar that falls, the volume control unit is connected with vocoder and audio power amplifier respectively, audio power amplifier is connected with the speaker.
Description
Technical Field
The utility model relates to an intercom field, especially a simulation intercom.
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; conversely, when a weak signal is received, the noise is high and the two parties are far apart.
In the conventional processing mode, a muting level is set in an interphone, a user sets the muting level on the basis of the basic principle that noise is not transmitted as much as possible according to communication environment and communication requirements, and the deeper the muting is set, the less interference is caused by noise or other useless signals, the smaller the noise is, but the less easy the user can receive effective weak signals to be received.
In addition, the filter circuit is added to filter out the out-of-band signals, but this also means that both the out-of-band invalid signals and the valid signals are filtered out.
SUMMERY OF THE UTILITY MODEL
The main objective of the utility model is to overcome prior art's shortcoming, provide one kind and add the independent IC of making an uproar of falling and distinguish and eliminate invalid signal to the interference signal in the intercom, guarantee the analog intercom that the conversation geology volume promoted communication distance simultaneously.
The utility model adopts the following technical scheme:
the utility model provides an analog interphone, including the radio frequency receiving element, demodulation unit, the vocoder, the IC of making an uproar falls, volume control unit, audio power amplifier and speaker, the radio frequency receiving element is connected with demodulation unit, demodulation unit is connected with the vocoder, the vocoder is used for realizing the interaction of control command through I2C bus and the IC communication connection of making an uproar that falls, the vocoder is used for realizing the interaction of audio data through I2S bus and the IC communication connection of making an uproar, volume control unit is connected with vocoder and audio power amplifier respectively, audio power amplifier is connected with the speaker.
Further, the noise reduction IC is IG1202, and the vocoder is NAU88C22 YG.
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 noise reduction IC distinguishes invalid signals and effective signals such as interference signals in received carrier signals and bottom noise generated by the circuit and eliminates the invalid signals, audio of useful signals is clearly restored, the call quality is guaranteed, and meanwhile the communication distance is increased.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention;
fig. 2 is a partial circuit diagram of an embodiment of the present invention, showing the circuit connections of the noise reduction IC and the vocoder.
In the figure: 1. the system comprises a radio frequency receiving unit, a demodulation unit, a vocoder, a noise reduction IC (integrated circuit), a volume control unit, an audio power amplifier, a loudspeaker, an I2C bus and an I2S bus, wherein the radio frequency receiving unit comprises 2 parts of a demodulation unit, 3 parts of a vocoder, 4 parts of a noise reduction IC, 5 parts of a volume control unit, 6 parts of an audio power amplifier, 7 parts of a loudspeaker.
Detailed Description
The present invention will be further described with reference to the following detailed description.
Referring to fig. 1 and fig. 2, the utility model discloses a simulation intercom, including radio frequency receiving element 1, demodulation unit 2, vocoder 3, IC4 falls makes an uproar, volume control unit 5, audio power amplifier 6 and speaker 7, radio frequency receiving element 1 is connected with demodulation unit 2, demodulation unit 2 is connected with vocoder 3, vocoder 3 is used for realizing control command's interaction through I2C bus 8 and IC4 communication connection that falls, vocoder 3 is used for realizing audio data's interaction through I2S bus 9 and IC4 communication connection that falls, volume control unit 5 is connected with vocoder 3 and audio power amplifier 6 respectively, audio power amplifier 6 is connected with speaker 7.
The noise reduction IC4 is IG1202, the vocoder 3 is NAU88C22YG, the noise reduction IC4 is an independent general-purpose module and is internally provided with a receiving firmware, an interface is arranged in the noise reduction IC4, the noise reduction IC4 can be suitable for all interphones, a user can independently purchase the noise reduction IC4 to be added into the existing machine, and cost is reduced.
Continuing to refer to fig. 1 and 2, during the use of the utility model, from radio frequency receiving element 1 received signal transfer to demodulation element 2, decompress the reduction back through vocoder 3 through demodulation element 2 and transmit to falling the IC4 of making an uproar, fall the IC4 of making an uproar and distinguish the signal of receiving to eliminate invalid signal, with valid signal transmission echo decoder 3, and through the power amplification back of audio power amplifier 6, play by speaker 7, the volume size of the steerable broadcast of volume control unit 5.
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 (2)
1. The utility model provides a simulation intercom which characterized in that: the system comprises a radio frequency receiving unit, a demodulating unit, a vocoder, a noise reduction IC, a volume control unit, an audio power amplifier and a loudspeaker, wherein the radio frequency receiving unit is connected with the demodulating unit, the demodulating unit is connected with the vocoder, the vocoder is in communication connection with the noise reduction IC through an I2C bus and is used for realizing the interaction of control instructions, the vocoder is in communication connection with the noise reduction IC through an I2S bus and is used for realizing the interaction of audio data, the volume control unit is respectively connected with the vocoder and the audio power amplifier, and the audio power amplifier is connected with the loudspeaker.
2. The analog interphone according to claim 1, characterized in that: the noise reduction IC is IG1202, and the vocoder is NAU88C22 YG.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022829873.7U CN213661610U (en) | 2020-11-30 | 2020-11-30 | Analog interphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022829873.7U CN213661610U (en) | 2020-11-30 | 2020-11-30 | Analog interphone |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213661610U true CN213661610U (en) | 2021-07-09 |
Family
ID=76688615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022829873.7U Active CN213661610U (en) | 2020-11-30 | 2020-11-30 | Analog interphone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213661610U (en) |
-
2020
- 2020-11-30 CN CN202022829873.7U patent/CN213661610U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2012089098A1 (en) | Method for communicating with a portable device having audio output | |
| CN101449320A (en) | Reduction of noise by the mobile communications devices in the state of non-calling | |
| US20070159371A1 (en) | Wireless audio data transmitting and receiving apparatus using human body | |
| CN201830414U (en) | Sound pickup | |
| US20180276172A1 (en) | Circuit for inhibiting single-ended analogue signal noise, and terminal attachment | |
| EP0828405A3 (en) | System for processing audio surround signal | |
| CN209642920U (en) | Environment sensing noise reduction in-ear typed Bluetooth headset | |
| CN101227758A (en) | Method for eliminating noise of audio equipment and audio equipment with silencing apparatus using the method | |
| CN213661610U (en) | Analog interphone | |
| CN201345681Y (en) | Terminal with the sound amplifying function | |
| CN105072241A (en) | Anti-sidetone circuit of intercom system isolation transformer | |
| CN205584461U (en) | Loudspeaker box | |
| CN214799474U (en) | Noise reduction interphone | |
| CN115333560A (en) | Bluetooth multi-person talkback noise reduction system | |
| CN201967104U (en) | Shift frequency anti-interference hidden earphone system | |
| CN211089900U (en) | K sings earphone | |
| CN213661609U (en) | Interphone hand microphone and interphone | |
| CN212850486U (en) | Bluetooth speaker intercom | |
| CN207664977U (en) | One kind being based on point-to-point digital intercom equipment | |
| CN216930250U (en) | Bluetooth wireless interview recording equipment with monitoring and listening back | |
| CN201051182Y (en) | Audio device with silence device | |
| CN211606751U (en) | Novel wireless microphone module | |
| CN205265681U (en) | Intercom circuit | |
| CN219041962U (en) | Audio circuit for improving signal-to-noise ratio | |
| CN212572544U (en) | Intercom of making an uproar falls in AI intelligence |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |