CN210469421U

CN210469421U - Fixed telephone receiver with echo cancellation

Info

Publication number: CN210469421U
Application number: CN201921982922.1U
Authority: CN
Inventors: 任杰; 刘博学
Original assignee: Chengdu Wangxiaobao Technology Co Ltd
Current assignee: Chengdu Wangxiaobao Technology Co Ltd
Priority date: 2019-11-15
Filing date: 2019-11-15
Publication date: 2020-05-05
Anticipated expiration: 2029-11-15

Abstract

The utility model discloses a fixed-line telephone receiver with echo elimination and an anti-crosstalk method thereof, wherein the fixed-line telephone receiver with echo elimination comprises a fixed-line receiver line interface, a microphone and a loudspeaker which are connected with the fixed-line receiver line interface; the microphone and the loudspeaker are connected with the echo cancellation module. The utility model discloses a on traditional fixed-line telephone earphone basis, set up the echo elimination module, with the sound source of the microphone that includes in the microphone pickup and the echo of speaker, filter the echo of speaker to obtain the sound source of true clear microphone, the utility model discloses a fixed-line telephone earphone with echo elimination simple structure, convenient to use can solve the problem that fixed-line telephone earphone was crosstalked.

Description

Fixed telephone receiver with echo cancellation

Technical Field

The utility model belongs to the technical field of fixed-line telephone, especially a fixed-line telephone receiver and anti-crosstalk method with echo cancellation

Background

A fixed telephone, called fixed telephone for short, commonly called a landline telephone, refers to a telephone set fixed at a certain position without movement, is different from a mobile telephone (mobile phone), and is often used in enterprise units. Fixed telephone is one of the important communication means in modern times, and utilizes the microphone in the telephone to modulate the current voltage on the telephone line by means of the vibration of voice, i.e. converts the voice into a voltage signal, and transmits the voltage signal to the other end of the telephone through the telephone line, and then utilizes the microphone to convert the voltage signal into a voice signal.

At present, because the loudspeaker and the microphone coexist in the handle, the sound of the receiver can be interfered into the microphone end of the receiver when reaching a certain value, so as to form crosstalk. The invention mainly solves the problem of crosstalk when the sound of the receiver needs to be amplified.

Disclosure of Invention

The utility model aims to provide a: aiming at the problem that crosstalk is formed when the sound of the receiver needs to be amplified because the loudspeaker and the microphone coexist in the handle of the fixed telephone receiver, the fixed telephone receiver with the echo elimination function is provided.

The utility model adopts the technical scheme as follows:

a fixed telephone receiver with echo cancellation comprises a fixed telephone receiver line interface, a microphone and a loudspeaker which are connected with the fixed telephone receiver line interface; the microphone and the loudspeaker are connected with the echo cancellation module.

The echo eliminating module adopts a DSP chip ATH 8809; and the line pin of the DSP chip ATH8809 is connected with a loudspeaker, and the out pin of the DSP chip ATH8809 is connected with a microphone.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the utility model discloses a fixed-line telephone receiver with echo cancellation simple structure, convenient to use can solve the problem that fixed-line telephone receiver is crosstalked.

2. The utility model discloses owing to adopt DSP chip ATH8809 technical design, the product is stable and the simple low price of circuit.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a conventional fixed-line telephone handset.

Fig. 2 is a schematic structural diagram of the fixed-line telephone receiver of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention, i.e., the described embodiments are only some, but not all embodiments of the invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiment of the present invention, all other embodiments obtained by the person skilled in the art without creative work belong to the protection scope of the present invention.

A conventional fixed-line handset as shown in fig. 1, wherein MIC is a microphone, SPK is a speaker, and RJ9 represents a fixed-line handset line interface; the traditional fixed-line telephone receiver comprises a fixed-line receiver wire interface, and a microphone and a loudspeaker which are connected with the fixed-line receiver wire interface; the microphone is used as the sound pick-up part of the fixed telephone receiver, and the loudspeaker is used as the sound output part of the fixed telephone receiver; the fixed-line earphone line interface is communicated with the fixed line through connecting the fixed-line earphone line, so that pickup and sound output of the fixed line are realized. That is, the microphone and the speaker are installed in the fixed-line handset at the same time, and when the volume of the speaker is turned up to a certain value, a part of echo is picked up by the microphone, so that the microphone picks up the echo including the sound source of the microphone and the speaker, thereby causing crosstalk.

Therefore, the utility model provides a fixed-line telephone receiver with echo elimination, which comprises a fixed-line telephone receiver line interface, a microphone and a loudspeaker which are connected with the fixed-line telephone receiver line interface; the microphone and the loudspeaker are connected with the echo cancellation module. The utility model discloses a on traditional fixed line earphone basis, set up the echo elimination module, with the sound source of the microphone that includes in the microphone pickup and the echo of speaker, filter the echo of speaker to obtain the sound source of true clear microphone.

The features and properties of the present invention are described in further detail below with reference to examples.

Example 1

The fixed-line telephone receiver with the echo cancellation provided by the embodiment comprises a fixed-line telephone receiver wire interface, a microphone and a loudspeaker, wherein the microphone and the loudspeaker are connected with the fixed-line telephone receiver wire interface; the microphone and the loudspeaker are connected with the echo cancellation module.

Fig. 2 shows the fixed-line telephone receiver of the present invention as shown in fig. 1, wherein MIC is a microphone, SPK is a speaker, and RJ9 represents a fixed-line telephone receiver cable interface; the echo eliminating module adopts a DSP chip ATH 8809; and the line pin of the DSP chip ATH8809 is connected with a loudspeaker, and the out pin of the DSP chip ATH8809 is connected with a microphone.

The mic pin of the DSP chip ATH8809 is used as a pickup part of the microphone, and can receive a sound source of the microphone and echoes of the loudspeaker; on the other hand, signals directly transmitted by a loudspeaker are received through a line pin; the DSP chip ATH8809 utilizes the line pin to receive the signal directly transmitted by the loudspeaker through the algorithm of the internal echo elimination, and filters the echo of the loudspeaker obtained through the mic pin, thereby obtaining the sound source of the real and clear microphone and transmitting the sound source to the microphone through the out pin.

Therefore, the utility model discloses following beneficial effect has:

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A fixed telephone receiver with echo elimination comprises a fixed telephone receiver line interface, a microphone and a loudspeaker which are connected with the fixed telephone receiver line interface, and is characterized by also comprising an echo elimination module which is connected with the microphone and the loudspeaker.

2. The fixed-line handset with echo cancellation as claimed in claim 1, wherein the echo cancellation module uses DSP chip ATH 8809; and the line pin of the DSP chip ATH8809 is connected with a loudspeaker, and the out pin of the DSP chip ATH8809 is connected with a microphone.