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LTE-based vehicle-mounted radio station audio signal processing circuit

A technology for audio signal processing and car radio, applied in electrical components, transmission systems, etc., can solve problems such as signal oscillation, design redundancy and complexity, noise, etc., to prevent signal oscillation, facilitate later repair and maintenance, and simple circuit structure Effect

Pending Publication Date: 2018-05-29
NANJING METRO CONSTRUCTION CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are still deficiencies in the audio design of TETRA in urban subway traffic, the design is redundant and complex, and there will be problems such as signal oscillation and noise during audio use

Method used

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  • LTE-based vehicle-mounted radio station audio signal processing circuit
  • LTE-based vehicle-mounted radio station audio signal processing circuit
  • LTE-based vehicle-mounted radio station audio signal processing circuit

Examples

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Embodiment Construction

[0018] The invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 1 Shown, the car radio audio signal processing circuit based on LTE includes an input module, an acquisition processing circuit, a volume control circuit, an audio transformer, and a microcontroller; the input module is externally connected to a hand microphone input signal; the acquisition processing circuit includes an amplification circuit and a filter circuit; the volume control circuit includes a two-channel electronic volume controller controlled by serial data; the microcontroller is used to send commands to the volume control circuit to control the work of the volume control circuit; the input signal is processed by the amplifier circuit and the filter circuit , adjust the volume through the volume control circuit, and then output to the channel machine through the audio transformer.

[0020] Such as figure 2 As shown, ...

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PUM

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Abstract

The invention discloses an LTE-based vehicle-mounted radio station audio signal processing circuit, which comprises an input module, an acquisition processing circuit, a volume control circuit, an audio transformer and a microcontroller, wherein the input module is externally connected with a hand microphone input signal; the acquisition processing circuit comprises an amplifying circuit and a filtering circuit; the volume control circuit comprises a dual-track electronic volume controller controlled by serial data; the microcontroller is used for sending a command to the volume control circuit and controlling the volume control circuit to work; after the input signal is processed by the amplifying circuit and the filtering circuit, the volume is adjusted through the volume control circuit, and then the volume is output to a channel machine through the audio transformer. The processing circuit is simple in structure; high-quality output of audio signals of an urban subway traffic audiosystem can be realized, performances of a voice system are improved, volume adjustment is convenient, and control precision is high.

Description

technical field [0001] The invention relates to the wireless communication audio design technology of urban traffic subway vehicle station, in particular to the signal processing circuit of the LTE-based audio design system. Background technique [0002] At present, the wireless communication systems of subway transportation mainly include TETRA and LTE systems. With the development of LTE technology, its advantages are obviously gradually highlighted in urban subway transportation. The LTE secondary development vehicle station system realizes the multimedia cluster dispatching communication system of the subway based on the LTE private network, and realizes the multimedia communication dispatching of voice and video. [0003] According to the requirements of the owner, TD Tech's LTE terminal EV750 (including LTE standard baseband radio frequency, Ethernet, audio input and output, and control interface, etc.) Acquisition and storage, video display touch screen unit, audio a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/3822H04B1/40
CPCH04B1/3822H04B1/40
Inventor 王健耿雷顾晓峻王小曹汤巧戈
Owner NANJING METRO CONSTRUCTION CO LTD
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