Signal normalization using loudness metadata for audio processing

Abstract

One embodiment provides a method of signal normalization. The method comprises receiving an input content with a corresponding audio signal, and extracting loudness metadata from an audio signal corresponding to the input content. The method further comprises estimating, using a machine learning model, a peak-level amplitude based on the loudness metadata. The peak-level amplitude represents a maximum linear amplitude of the audio signal over an entire duration of the input content. The method further comprises determining a gain based at least on the peak-level amplitude, and applying the gain to the audio signal. The resulting gain-scaled audio signal is provided to one or more speakers coupled to or integrated in an electronic device for audio playback.