Method and device for dynamically adjusting volume

Abstract

The invention discloses a method for dynamically adjusting a volume, which comprises the following steps of: determining a step length I for dynamically adjusting an output volume according to a preset volume gradual-change time length T, preset volume gradual-change frequency F, and a difference value between a currently output volume V1 and a preset output volume V2, and determining a dynamic adjustment mode according to the step length I; determining a dynamic adjustment period for the output volume according to the preset volume gradual-change frequency F; and at the beginning of each dynamic adjustment period, dynamically adjusting the output volume to the preset output volume V2 according to the dynamic adjustment step length I and the dynamic adjustment mode. Correspondingly, the invention also discloses a device for dynamically adjusting the volume. The method and the device can achieve an output volume gradual-change effect under a plurality of conditions of music play, pause, stop, dragging and the like, and also can achieve a volume smooth transition effect in music switching or volume adjustment so as to make the playing of the music smoother and softer.

Description

technical field [0001] The invention relates to the field of multimedia technologies, in particular to a method and device for dynamically adjusting volume. Background technique [0002] PCM (Pulse-code modulation, pulse code modulation) audio data is a digitization method of analog signals. It divides the strength of the signal into several segments according to the same interval, and then quantizes it with a unique digital symbol (usually binary). PCM is an audio data format supported by general sound cards. [0003] In order to make the music playback smoother and softer, it is generally necessary to gradually change the output volume when the music is switched. In the existing solutions for gradually changing the output volume, it is mainly to perform attenuation coefficient processing on the original audio data, and achieve the gradual change of the output volume through the gradual change of the coefficient. Since the original audio data (PCM encoded audio data) has...

AI Technical Summary

Problems solved by technology

[0009] The inventor found in the process of implementing the present invention that the above-mentioned solution needs to perform coefficient gradient processing in advance to achieve volume gradient before the audio data is filled in the sound card for playback. Therefore, it can only support natural audio playback and stop. Gradation (fading in and out) processing, when the user switches manually, such as when the user drags to change the audio playback progress, or when the user manually switches songs, this solution is difficult to make a gradient

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