Method and apparatus to automatically control audio volume

摘要

A method includes comparing a magnitude value of an audio signal in a fixed unit section with a target volume level, measuring audio gain in each fixed unit section using specific functions which are each determined to be different according to a ratio of the target volume level to the audio signal magnitude, and providing the measured audio gain to the audio signal in the fixed unit section.

主权项

1. An apparatus to automatically control audio volume, the apparatus comprising:
a frame power calculating unit to calculate a power value of an input audio signal in a fixed section unit; a volume controller to compare a magnitude value of an audio signal calculated in the frame power calculating unit with a determined target volume level and to obtain an audio gain using specific functions; and an output buffer unit to output an audio signal to which the audio gain measured in the volume controller is applied, wherein the audio gain is obtained by dividing a ratio of the magnitude value of the audio signal to the determined target volume level into a plurality of cases and applying a different exponential function in which an auditory characteristic is reflected to each case.