Audio automatic gain control method and device

An automatic gain control and gain control technology, applied in the direction of gain control, amplification control, electrical components, etc., can solve the problems of different audio signal strength, inability to ensure stability, system fluctuations, etc., to achieve continuous adjustable gain control, Improve the signal measurement accuracy and eliminate the effect of damping oscillation

Pending Publication Date: 2018-02-02
浙江芯劢微电子股份有限公司
View PDF19 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the process of audio signal processing, due to different audio sources, there are different audio signal strengths, accompanied by noise
There are mainly two existing audio adjustment methods. One is that the user manually adjusts the input volume to change the final output volume, but this method is cumbersome to operate and the user experience...

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
  • Audio automatic gain control method and device
  • Audio automatic gain control method and device
  • Audio automatic gain control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The embodiments of the present invention will be further described below. The following examples only further illustrate the present application, and should not be construed as limiting the present application.

[0028] Such as figure 1 and image 3 As shown, an audio automatic gain control method implementation steps are as follows:

[0029] After the audio signal passes through the programmable gain amplifier module and the ADC module, the audio data to be processed is output;

[0030] The audio data to be processed enters the error detection module, calculates the difference between the maximum value of the absolute value of the audio data amplitude of the current frame and the peak value of the target amplitude, and generates an error signal value err;

[0031] The error signal value err enters the loopback filter module to process and output the error signal value err out ;

[0032] Error signal value err out Enter the gain control module for processing, acco...

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 discloses an audio automatic gain control method and device. The method comprises the following steps: inputting audio signals to a programmable gain amplifier module and an ADC (Analogto Digital Conversion) module, then outputting audio signals to be processed to an error detection module, calculating the difference between the maximum of an amplitude absolute value of a current frame of audio data and a target amplitude peak, generating an error signal value err, processing the err in a loop back filter module to output an error signal value errout, processing the errout in again control module, comparing the absolute value of the errout and a preset error margin threshold errth to generate a gain control parameter, and feeding the gain control parameter back to a programmable gain amplifier, thus realizing automatic control on audio signal gain. The amplitude, which is too large or too small, of the input audio signals is adjusted to a standard range by automaticallycontrolling the gain thereof; and in face of large peak error, possible damped oscillation is eliminated by loop back filtration, so that the problem of fluctuation of audio signals is solved.

Description

technical field [0001] The invention relates to audio data processing technology, in particular to an audio automatic gain control method and device. Background technique [0002] The processing and playback of audio signals has been widely used in various scenarios. In the process of audio signal processing, due to different audio sources, different audio signal strengths are different, accompanied by noise. There are mainly two existing audio adjustment methods. One is that the user manually adjusts the input volume to change the final output volume, but this method is cumbersome to operate and the user experience is poor; the other is automatic audio gain. Adjustment method, but this method lacks loopback filter processing, and cannot ensure that the entire automatic gain control system can remain stable during the gain adjustment process. When a large peak error is encountered, damping oscillations may occur and the system fluctuates, thus The voice fluctuates. Conte...

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
IPC IPC(8): H03G3/30
CPCH03G3/301
Inventor 何利蓉肖文勇江彩云
Owner 浙江芯劢微电子股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap