Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Background noise elimination circuit for fire protection system and its control method

A technology of background noise and fire protection system, which is applied in the field of fire telephone and fire broadcast, and can solve problems such as the decline of call quality and self-excitation phenomenon

Active Publication Date: 2021-08-20
SHENZHEN TANDA TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a circuit for eliminating background noise in a fire protection system, aiming at solving the problems in the traditional technical solution that the background noise causes the call quality to decline and causes self-excitation phenomenon

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Background noise elimination circuit for fire protection system and its control method
  • Background noise elimination circuit for fire protection system and its control method
  • Background noise elimination circuit for fire protection system and its control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0032] Such as figure 1 Shown is a schematic structural diagram of a fire-fighting system background noise elimination circuit according to an embodiment of the present invention, a background noise elimination circuit applied to a fire-fighting system, the circuit includes: a filter unit 10, a signal amplification unit 20, a reverse unit 30, and an integration unit 40 and output unit 50 .

[0033] The filter unit 10 is used to filter the input audio signal. The filter unit 10 includes a DC filter module 11 and a DC input module 12. The DC filter module 11 is connected to the DC input module 12. T...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the fields of fire broadcasting and fire telephones, and provides a circuit for eliminating background noise in a fire protection system and a control method thereof. The circuit includes: a filter unit, which is used for filtering an input audio signal, and Input a DC component; a signal amplifying unit, connected to the filtering unit, for amplifying the filtered audio signal and outputting a first signal; a reverse unit, connected to the signal amplifying unit, for amplifying the first signal The signal is reversed and the second signal is output; the integration unit is connected to the signal amplification unit and the inversion unit, and the first signal and the second signal are integrated to obtain the integration signal; the output unit is connected to the The integration unit is connected to compare the integration signal with a preset threshold voltage, and output a control signal according to the comparison result to control the output of the audio signal.

Description

technical field [0001] The invention belongs to the fields of fire broadcasting and fire telephones, and in particular relates to a circuit for eliminating background noise and a control method thereof. Background technique [0002] In the event of a fire accident, in order to help people understand the scene in a timely manner, or help managers evacuate the crowd at the scene, it is necessary to broadcast evacuation information through the fire broadcast system and notify the scene through the fire telephone system. [0003] Because there will be a certain amount of background noise in the use environment, whether it is for the sender or the receiver, when there is background noise, it will have a certain impact on the quality of the sound. In the telephone system, the background noise will degrade the quality of the call , Excessive background noise in the broadcasting system will cause self-excitation and other phenomena. Contents of the invention [0004] The purpose ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G10L21/0208H04M1/19
CPCG10L21/0208H04M1/19
Inventor 宋佳城万跃敏靳东风秦志军刘子健
Owner SHENZHEN TANDA TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com