CN212850663U

CN212850663U - PSTN dialing system with noise reduction function

Info

Publication number: CN212850663U
Application number: CN202022146249.7U
Authority: CN
Inventors: 蒋慧锋; 陈福金; 吴凯; 林青; 廖鑫浩; 潘泽平; 刘一锚
Original assignee: Shenzhen Sanxin Communication Software Technology Co ltd
Current assignee: Shenzhen Sanxin Communication Software Technology Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-03-30
Anticipated expiration: 2030-09-27

Abstract

A PSTN dialing system with noise reduction function comprises a main control panel, an integrated power management circuit electrically connected with a power port of the main control panel, an embedded nonvolatile memory connected with a storage control interface of the main control panel, a keyboard connected with the main control panel, and an MCU controller electrically connected with a UART interface of the main control panel; the PSTN chip is electrically connected with the GPIO interface of the MCU controller; the system also comprises a stored program control exchanger connected with an RJ11 interface of the PSTN chip; the utility model discloses a dialing system; the dialing system of the utility model can reduce the noise of the sound after the sound is recorded by the microphone and before the sound is played by the loudspeaker, the output sound has high degree of restitution and better sound effect; the sound effect with high signal-to-noise ratio and low distortion is realized.

Description

PSTN dialing system with noise reduction function

Technical Field

The utility model relates to a dialing system especially involves a PSTN dialing system with function of making an uproar is fallen.

Background

Most of the existing dialing systems have relatively high noise when a telephone line is accessed for communication.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems of the prior art to a certain extent. Therefore, the utility model aims at providing a PSTN dialing system with function of making an uproar is fallen.

A PSTN dialing system with noise reduction function comprises a main control panel, an integrated power management circuit electrically connected with a power port of the main control panel, an embedded nonvolatile memory connected with a storage control interface of the main control panel, a keyboard connected with the main control panel, and an MCU controller electrically connected with a UART interface of the main control panel; the PSTN chip is electrically connected with the GPIO interface of the MCU controller; and the SPC exchange is connected with the RJ11 interface of the PSTN chip.

Further, an SPK port of the PSTN chip is connected with a loudspeaker switch; the MIC interface of the PSTN chip is connected with a microphone switch, and the input end of the microphone switch and the output end of the loudspeaker switch are also electrically connected with a noise reduction processor.

Furthermore, a loudspeaker is electrically connected to the loudspeaker switch, and a microphone is electrically connected to the microphone switch.

Furthermore, the earphone is connected with the microphone switch.

Further, the MIC port of the handset is electrically connected to the microphone switch, and the SPK port of the handset is connected to the speaker switch.

Furthermore, the device also comprises a touch panel connected with the main control panel.

The utility model has the advantages that:

the dialing system of the utility model can reduce the noise of the sound after the sound is recorded by the microphone and before the sound is played by the loudspeaker, the output sound has high degree of restitution and better sound effect; the sound effect with high signal-to-noise ratio and low distortion is realized.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a block diagram of a PSTN dialing system with a noise reduction function according to the present invention.

Shown in the figure:

1. a main control panel; 2. a power interface; 3. a power management circuit; 4. a non-volatile memory; 5. a noise reduction processor; 6. a keyboard; 7. a UART interface; 8. an MCU controller; 9. a GPIO interface; 10. a PSTN chip; 11. an RJ11 interface; 12. a stored program controlled switch; 13. a touch panel; 14. a speaker switch; 15. a microphone switch; 16. a speaker; 17. a microphone; 18. and a receiver.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, back, inner and outer, and the center … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

Example 1:

as shown in fig. 1, the PSTN dialing system with noise reduction function includes a main control board 1, an integrated power management circuit 3 electrically connected to a power port 2 of the main control board 1, an embedded nonvolatile memory 4 connected to a storage control interface of the main control board, and a keyboard 6 connected to the main control board 1; an MCU controller 8 electrically connected with the UART interface 7 of the main control board 1; the device also comprises a PSTN chip 10 electrically connected with the GPIO interface 9 of the MCU controller 8; the system also comprises a stored program control exchanger 12 connected with the RJ11 interface 11 of the PSTN chip 10; and a touch panel 13 connected to the main control board 1.

Preferably, the storage capacity of the non-volatile memory 4 is greater than 1 GB.

Further preferably, the integrated power management circuit 3 is mainly used to manage the power devices in the main control board.

Preferably, the SPK port of the PSTN chip 10 is connected with a speaker switch 14; the MIC interface of the PSTN chip 10 is connected with a microphone switch 15; the input end of the microphone switch 15 and the output end of the loudspeaker switch 14 are also electrically connected with a noise reduction processor 5; the noise reduction processor 5 adopts a HD noise reduction processor with low power consumption, can process environmental noise and eliminate noise interference of various frequency bands. The processor integrates a digital noise reduction and 36bit sound signal processor, a digital-to-analog converter and an amplifier, and after the processing of the noise reduction processor 5, the sound effect with high signal-to-noise ratio and low distortion is realized.

The PSTN dialing system described in this embodiment uses a normal analog 2-wire telephone.

The loudspeaker switch 14 is also electrically connected with a loudspeaker 16, and the microphone switch 15 is also electrically connected with a microphone 17; preferably, an earpiece 18 connected to the microphone switch 15; the MIC port of the receiver 18 is electrically connected with the microphone switch 15, and the SPK port of the receiver is connected with the loudspeaker switch 14; input and output of sound are realized by the speaker 16 and the microphone 17; the PSTN chip, as a public switched telephone network, is a circuit switched service based on standard telephone lines, used as a connection to connect remote endpoints.

It should be noted that the working principle of the present embodiment is as follows:

when the dialing system dials in the PSTN mode, the main control panel 1 acquires the state of the receiver 18, the receiver 18 off-hook or the hands-free off-hook is sent to the MCU controller 8 according to the state of the receiver 18, after an off-hook signal is sent, the main control panel 1 writes the number to be dialed by a user into the MCU controller, the MCU controller 8 transmits data to the RJ11 interface 11, namely a telephone line jack, and then transfers the data to the upper side of the stored program control switch 12, and the stored program control switch 12 transfers the data to the China telecommunication network to complete dialing in the PSTN mode;

when a call comes in PSTN mode; the China telecommunication network sends data to the program control switch 12, the program control switch 12 sends the data to the RJ11 interface 11 through a telephone line, the RJ11 interface 11 sends the data to the MCU controller 8, and the main control panel 1 displays the calling number to a user through the touch panel 13 after analyzing and processing the data; after answering, the voice of the dialer is collected through a microphone 17, noise reduction is carried out through a noise reduction processor 5, then the voice is transferred to a program control switch 12 through an RJ11 interface 11, and finally voice data are transmitted to called equipment through a China telecommunication network; the voice data of the caller is transmitted to the program controlled exchanger 12 through the China telecommunication network, the program exchanger 12 sends the data to the RJ11 interface 11 through the telephone line, then carries on the noise reduction processing through the noise reduction processor 5 after passing through the PSTN chip 10, finally sends out the sound through the loudspeaker; the sound effect with high signal-to-noise ratio and low distortion is realized.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A PSTN dialing system with a noise reduction function is characterized in that: the system comprises a main control board, an integrated power management circuit electrically connected with a power port of the main control board, an embedded nonvolatile memory connected with a storage control interface of the main control board, a keyboard connected with the main control board, and an MCU controller electrically connected with a UART interface of the main control board; the PSTN chip is electrically connected with the GPIO interface of the MCU controller; the system also comprises a stored program control exchanger connected with the RJ11 interface of the PSTN chip; the SPK port of the PSTN chip is connected with a loudspeaker switch; the MIC interface of the PSTN chip is connected with a microphone switch, and the input end of the microphone switch and the output end of the loudspeaker switch are also electrically connected with a noise reduction processor.

2. The PSTN dialing system with noise reduction function according to claim 1, wherein: the loudspeaker switch is also electrically connected with a loudspeaker, and the microphone switch is also electrically connected with a microphone.

3. The PSTN dialing system with noise reduction function according to claim 2, wherein: and the earphone is connected with the microphone switch.

4. The PSTN dialing system with noise reduction function as claimed in claim 3, wherein: and the MIC port of the receiver is electrically connected with the microphone switch, and the SPK port of the receiver is connected with the loudspeaker switch.

5. The PSTN dialing system with noise reduction function according to claim 1, wherein: the touch control panel is connected with the main control panel.