Distortion reducing multi-band compressor with dynamic thresholds based on scene switch analyzer guided distortion audibility model

A method of dynamically adjusting thresholds of a compressor responsive to an input audio signal, the method comprising:

• receiving, by a scene switch analyzer, an input audio signal having a plurality of frequency band components;
• determining, by the scene switch analyzer, whether a scene switch has occurred in the input audio signal, wherein a scene switch is determined to have occurred when the input audio signal transitions from being a broadband signal to being a narrowband signal or vice versa;
• providing, by the scene switch analyzer, one or more control signals to a distortion audibility model to guide smoothing to compressor thresholds of the frequency band components by guiding a change of an attack time constant and/or a release time constant of a smoother;
• and
• processing the frequency band components of the input audio signal, including:
• in response to determining that scene switch has not occurred, the control signal indicating use of a large time constant thereby applying slow smoothing to compressor thresholds of the frequency band components;
• and
• in response to determining that scene switch has occurred, the one or more control signals indicating use of a small or zero-valued time constant thereby applying fast smoothing or no smoothing to the compressor thresholds of the frequency band components.