Method for automatic amplification of volume

Abstract

The invention relates to a method for automatically amplifying the volume, comprising: A, according to the parameter of distortion rate, calculating the maximum amplitude value which meets the preset distortion rate, then, dividing the maximum of sampling point with said maximum amplitude value to attain the maximum magnification times; B, individually multiplying each sampling point of said audio processing block with the maximum magnification times attained in the step A to attain the new amplitude value to be output. The inventive method via setting the parameter of distortion and neglecting the sampling point with super-high amplitude value calculate the maximum magnification times, utilizing which to process the volume amplifying, therefore it can confirm the amplifying effect of most audio flow and improve the audio amplifying quality; in addition, via the parameter of maximum magnification times, making calculated maximum magnification times less than said parameter of maximum magnification times, for avoiding the noise in the mute stage of amplifying process and improve the hearing quality in said process.

Description

technical field [0001] The invention belongs to the technical field of voice transmission, and in particular relates to a method for automatically amplifying volume during voice transmission. Background technique [0002] Currently, voice transmission can be realized through a video conferencing system and software such as Instant Messaging (IM), so as to realize voice interaction between two places. During the voice transmission process, it often happens that the calling party lowers the volume of the local system, which causes the volume at the receiving end to be too low so that the receiving party cannot hear clearly. At this time, if the user at the receiving end manually increases the volume of the local system, it will affect the sound playback effect of other local devices. At the same time, multiple voices from multiple sending users are received, and the volumes of these multiple voices are different. If you choose to increase the local volume as a whole at this t...

AI Technical Summary

Problems solved by technology

[0005] In a piece of speech, there will always be occasional periods of super-high volume, and the amplitude values ​​of the sample points corresponding to these super-high periods are much higher than those of the surrounding sample points; in the prior art, in order to make all samples Points are not distorted after being amplified. It is necessary to find the highest sample point amplitude value in the speech segment, and use this amplitude value as a standard to calculate the maximum allowable magnification factor, and use this maximum magnification factor as the speech amplification process. The upper limit of the magnification; due to the existence of ultra-high amplitude value sample points, the existing technology must use the ultra-high amplitude value as a standard to calculate the maximum magnification, and the calculated maximum magnification must be smaller, and the smaller The amplification factor is used as the upper limit of the amplification factor in the voice amplification process, which will affect the amplification effect of most normal voice streams in the voice

[0006] In addition, when calculating the magnification in the prior art, the situation during the silent period is ignored. When the call is in the silent period, the calculated magnification is often very large, and the prior art does not impose any restrictions on the silent period. Therefore, During the period of silence, there will be a phenomenon that the background sound is super-amplified due to the large amplification factor, and there will be a howling sound at the receiving end, which will seriously affect the hearing effect of the receiving end

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