Automatic volume leveling
AssigneeBose Corporation
InventorsBrian Ellison, Gabriel Olochwoszcz, Michael W. Stark
Life of this patent
Estimating the term…
Abstract
An audio device is provided. The audio device comprises a controller and an acoustic transducer. The controller is configured to receive an input audio signal. The controller is further configured to generate, via a loudness detector, a loudness level of a first portion of the input audio signal. The controller is further configured to identify a compression curve of a plurality of compression curves corresponding to a user volume setting. The controller is further configured to adjust, via an audio compressor, a second portion of the input audio signal based on the loudness level and the compression curve to generate an output audio signal. The loudness level is determined according to LUFS model.
Claims20
An audio device comprising a controller configured to:
- receive an input audio signal, wherein the input audio signal comprises a first portion and a second portion, wherein the first portion of the input audio signal begins at a first time, wherein the second portion of the input audio signal begins at a second time following the first time, and wherein a difference between the first time and the second time is no greater than an adjustment timing period;
- generate, via a loudness detector, a loudness level of the first portion of the input audio signal;
- identify a compression curve of a plurality of compression curves corresponding to a user volume setting, wherein each of the plurality of compression curves comprises an upward compression portion providing amplification and a downward compression portion providing attenuation, and wherein an intensity of the amplification and attenuation decreases as the user volume setting increases;
- adjust, via an audio compressor, the second portion of the input audio signal based on the loudness level and the compression curve to generate an output audio signal.
A method for adjusting an input audio signal, comprising:
- receiving, via a controller, the input audio signal, wherein the input audio signal comprises a first portion and a second portion, wherein the first portion of the input audio signal begins at a first time, wherein the second portion of the input audio signal begins at a second time following the first time, and wherein a difference between the first time and the second time is no greater than an adjustment timing period;
- generating, via a loudness detector of the controller, a loudness level of the first portion of the input audio signal;
- identifying, via the controller, a compression curve of a plurality of compression curves corresponding to a user volume setting, wherein each of the plurality of compression curves comprises an upward compression portion providing amplification and a downward compression portion providing attenuation, and wherein an intensity of the amplification and attenuation decreases as the user volume setting increases;
- adjusting, via an audio compressor of the controller, the second portion of the input audio signal based on the loudness level and the compression curve to generate an output audio signal.
Dependencies are inferred from the claim text.