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Automatic gain control method and apparatus for audio signal

An automatic gain control and audio signal technology, which is applied in the direction of telephone communication, sound input/output, data processing input/output process, etc., can solve the problems of audio signal volume discontinuity, poor effect, sudden change in volume, etc., to achieve Smooth audio signal, improve user experience, and improve continuity

Active Publication Date: 2017-05-10
GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, during the research process of the present invention, the inventor found that the prior art has the following defects: when the gain is adjusted by comparing with the set threshold value, there will be a sudden change in the volume, so that the audio signal heard by the user The volume range is discontinuous and the effect is not good

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  • Automatic gain control method and apparatus for audio signal
  • Automatic gain control method and apparatus for audio signal
  • Automatic gain control method and apparatus for audio signal

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Embodiment 1

[0024] figure 2 It is a schematic flow chart of an automatic gain control method for an audio signal in Embodiment 1 of the present invention. This embodiment is applicable to the scenario of performing automatic gain on an audio signal, and the method can be executed by an automatic gain control device for an audio signal ,like figure 2 As shown, the method specifically includes the following steps:

[0025] Step 101. Determine the volume difference between the actual volume of the audio signal and the set volume threshold.

[0026] Exemplarily, the actual volume of the audio signal refers to the actual volume of the input audio signal. For example, when playing multimedia, the volume of the input audio signal is the volume of the multimedia file. The sound volume of the file is inconsistent. The volume threshold value refers to the preset volume threshold value that needs to be adjusted for the input audio signal. It is usually set according to experience. Specifically,...

Embodiment 2

[0040] Based on the foregoing embodiments, the embodiment of the present invention refines the calculation of the target volume, and is applicable to the scenario of automatically gaining audio signals. image 3 It is a schematic diagram of the relationship between input data and output data of an automatic gain control method for audio signals in Embodiment 2 of the present invention, combined with image 3 , the method for automatic gain control of an audio signal provided in the embodiment of the present invention is exemplarily described.

[0041] like image 3 As shown, wherein, the X-axis represents the input data, specifically the volume value of the input audio signal; the Y-axis represents the output data, specifically the volume value of the output audio signal; the origin of the coordinates represents that the volume is approaching negative infinity; the X-axis and 0dB on the Y axis represents the maximum volume of the input audio signal and the maximum volume of t...

Embodiment 3

[0072] Figure 5 It is a schematic structural diagram of an automatic gain control device for audio signals in Embodiment 3 of the present invention. The device can be implemented by software and / or hardware, and can gain audio signals by executing an automatic gain control method. like Figure 5 As shown, the device includes a difference determination module 301 , a calculation module 302 and an adjustment module 303 .

[0073] Wherein, the difference determination module 301 is used to determine the volume difference between the actual volume of the audio signal and the set volume threshold;

[0074] A calculation module 302, configured to calculate the target volume according to the volume difference if it is determined according to the volume difference that the actual volume is within the range value of the smoothing interval;

[0075] The adjustment module 303 is configured to adjust and output the audio signal according to the target volume.

[0076] The automatic ga...

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Abstract

Embodiments of the invention disclose an automatic gain control method and apparatus for an audio signal. The method comprises the steps of determining a volume difference value between practical volume of the audio signal and a set volume threshold value; if the practical volume is determined to be in a range of smooth processing interval according to the volume difference value, calculating target volume according to the volume difference value; and adjusting the audio signal according to the target volume and outputting the adjusted audio signal. Through the technical scheme, automatic gain control on the volume of the audio signal is realized, and the continuity of volume range adjustment of the audio signal is effectively improved, so that the output audio signal is smoother and the usage experience of a user is improved.

Description

technical field [0001] Embodiments of the present invention relate to audio data processing technologies, and in particular to an automatic gain control method and device for audio signals. Background technique [0002] The processing and playback of audio signals has been widely used in various scenarios. For example, during a real-time voice call, it is necessary to process the voice signal of the other party in the call terminal and then play it; during the playback of multimedia audio files such as songs, The audio signal needs to be processed by the playback device and then played. During the processing of the audio signal, due to the difference of the audio source, there is a phenomenon that the volume intensity of different audio signals is not the same, accompanied by noise. For users, it is hoped that the volume can tend to be consistent when answering calls from different people, and the volume can tend to be consistent when listening to different songs. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/16H04M1/725
CPCG06F3/165H04M1/72433H04M1/72442
Inventor 程雪峰
Owner GUANGZHOU SHIYUAN ELECTRONICS CO LTD
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