Audio signal loudness control

Abstract

Example embodiments disclosed herein relate to audio signal loudness control. A method for controlling loudness of an audio signal is disclosed. The method includes responsive to determining presence of a noise signal, deriving a target partial loudness adjustment based, at least in part, on at least one of a first factor related to the noise signal and a second factor related to the audio signal. The method further includes determining a target partial loudness of the audio signal based, at least in part, on the target partial loudness adjustment. Corresponding system, apparatus and computer program product are also disclosed.

Description

technical field [0001] Embodiments of the invention relate generally to audio signal processing, and more particularly, to methods and systems for controlling the loudness of audio signals. Background technique [0002] Loudness is a psychoacoustic correlation of the physical intensity of a sound. According to psychoacoustic studies, when an audio of interest is listened to by headphones, earphones, etc. in the presence of background noise (competing sound), the perceived audio loudness decreases as the level of the competing sound increases. As used herein, the perceived loudness of an audio signal in the presence of background noise may be referred to as "partial loudness." figure 1 The relationship between partial loudness and background noise is shown. As can be seen, as the noise signal level increases from 10 dB (curve 1 ) to 40 dB (curve 2 ), the partial loudness of the audio signal with the same signal excitation level decreases. To solve this problem, attempts ar...

Images