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Echo suppression circuit in hands-free call of operation display terminal and implementation method

A technology of echo suppression and hands-free calling, which is applied in the direction of electrical components, telephone structure, sustainable communication technology, etc. It can solve problems affecting call quality and echo phenomenon, so as to improve call quality, reduce echo interference, and solve echo adverse effects

Pending Publication Date: 2020-06-30
TIANJIN 712 COMM & BROADCASTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the operation display terminal of the locomotive integrated wireless communication equipment uses half-duplex mode to communicate with the ground, but it can support full-duplex communication during GSMR communication and LTE communication, so echo phenomenon will occur, which seriously affects the quality of communication

Method used

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  • Echo suppression circuit in hands-free call of operation display terminal and implementation method
  • Echo suppression circuit in hands-free call of operation display terminal and implementation method
  • Echo suppression circuit in hands-free call of operation display terminal and implementation method

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the drawings.

[0016] Such as figure 1 As shown, an echo suppression circuit in a hands-free call of an operating display terminal includes a power supply circuit, an ARM processor, an audio codec circuit, an echo suppression circuit, and an audio power amplifier circuit; the ARM processor uses the RT1060 chip, and the audio codec circuit uses The model is TLV320AIC3106 chip, the echo suppression circuit uses the model FM-1288-GA1 chip, the audio power amplifier circuit uses the model SSM3302 chip; the RT1060 chip of the ARM processor is connected to the TLV320AIC3106 chip of the audio codec circuit through the IIS and IIC bus, and ARM processing The RT1060 chip of the device is connected to the FM-1288-GA1 chip of the echo suppression circuit through the IIC bus, the FM-1288-GA1 chip of the echo suppression circuit is connected to the TLV320AIC3106 chip through audio signals, and the TLV320AIC3106 c...

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Abstract

The invention discloses an echo suppression circuit in a hands-free call of an operation display terminal and an implementation method. The circuit comprises a power supply circuit, an ARM processor,an audio encoding and decoding circuit, an echo suppression circuit and an audio power amplifier circuit. The power supply circuit is used for converting an input power supply into various voltages tosupply power to each unit, the ARM processor circuit is used for controlling each circuit to realize data conversion and transmission, the audio encoding and decoding circuit is used for mutual conversion of analog signals and digital signals, the echo suppression circuit is used for suppressing echo during duplex communication, and the audio power amplifier circuit is used for driving the loudspeaker to play voice. According to the invention, the echo suppression technology is used to effectively solve the echo bad phenomenon, the call quality is greatly improved, the echo suppression duringthe call of the operation display terminal used in the railway industry is realized, the noise in the call process is reduced, the echo interference in the call process is reduced, and the voice callof the operation display terminal is clearer.

Description

Technical field [0001] The invention relates to a locomotive integrated wireless communication device, in particular to an echo suppression circuit in a hands-free conversation with an operation display terminal and an implementation method. Background technique [0002] At present, the operation display terminal of the locomotive integrated wireless communication equipment uses half-duplex mode to talk to the ground, but it can support full-duplex calls during GSMR and LTE calls. Therefore, echoes will occur, which seriously affects the quality of the call. Summary of the invention [0003] In view of the problems existing in the prior art, the present invention provides an echo suppression circuit and implementation method for hands-free calls of an operating display terminal. The product is designed in hardware through a power supply circuit, an ARM processor, an audio codec circuit, an echo suppression circuit, and an audio The power amplifier circuit cooperates to realize the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/20H04M9/08H04R3/02
CPCH04M1/20H04M9/08H04R3/02H04R2499/11Y02D30/70
Inventor 杨会心贺松松李世凯刘靖马健康
Owner TIANJIN 712 COMM & BROADCASTING CO LTD