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Automatic sound volume adjusting method and system

A volume adjustment and automatic technology, applied to TV system parts, color TV parts, TV, etc., can solve problems such as noise, avoid noise, prevent sudden increase or decrease of volume, and provide comfortable listening experience Effect

Inactive Publication Date: 2010-03-03
逐点半导体(上海)股份有限公司
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AI Technical Summary

Problems solved by technology

[0004] The above technical solution realizes the automatic adjustment of the volume to a certain extent, but only through the technical solution of modifying the amplitude of the analog audio signal. Adjusting the voltage amplitude of the accompanying sound through the "plus" or "minus" key may cause the control signal to be too high. Rapid changes introduce additional noise

Method used

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  • Automatic sound volume adjusting method and system
  • Automatic sound volume adjusting method and system
  • Automatic sound volume adjusting method and system

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Embodiment Construction

[0028] The usual audio processing converts the input audio data into digital audio data, controls it according to the parameters set by the user, and then converts it into analog audio data output; at the same time, in order to overcome the sudden change of the volume, before controlling the audio data according to the user setting, add A method for automatic volume adjustment. see figure 1 , is a flowchart of an audio processing method in the prior art.

[0029] The present invention provides a method for automatic volume adjustment aiming at the defects of existing automatic volume adjustment, see figure 2 , including the following steps:

[0030] Step 101, use a high-pass / low-pass filter to divide the input audio data into high-band audio data and low-band audio data; because the frequency range of the subwoofer is usually selected from 0-200Hz, the cutoff frequency (cutoff frequency) that distinguishes the high and low frequency bands It is 200Hz, audio data below 200H...

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Abstract

A method for automatically regulating volume includes dividing input audio data to be two bands of low and high and calculating average volume of the two separately, converting average volume to be onlog domain and obtaining control gain data according to control curve value, converting obtained data to be on linear domain, multiplying said data separately by delayed corresponding band data and adding as well as outputting high / low band audio data after multiplication.

Description

technical field [0001] The invention relates to a method and system for automatic volume adjustment, in particular to a method and system for automatically adjusting volume and preventing sudden changes in volume. Background technique [0002] Users can manually set the volume and other parameters of TV programs to a certain value, but the volume of different TV program sources may be loud or small. For example, the audio volume of different channel signal sources varies greatly; The purpose of attention is often greater than the volume of normal programs. Therefore, when the TV channel is changed or the program of a certain channel is changed, the volume often increases or decreases suddenly, which brings uncomfortable feeling to the audience. [0003] The utility model with the patent No. 200320119709 proposes the following technical solution from the perspective of analog signal processing to solve the above problems: detect the audio volume signal at the audio input end...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N5/60
Inventor 易彦
Owner 逐点半导体(上海)股份有限公司
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