Audio signal processing method and apparatus for controlling loudness level and dynamic range
AssigneeGaudio Lab, Inc.
InventorsHyunjoo Chung, Sangbae Chon, Hyunoh Oh, Jeonghun Seo
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Abstract
Disclosed is a method of operating an audio signal processing apparatus playing content including an audio signal. The method includes receiving the audio signal, receiving metadata including information related to a loudness of the audio signal, the metadata including loudness distribution information indicating, for each of a plurality of steps separated according to a loudness magnitude, a ratio between an amount of the audio signal corresponding to each of the plurality of steps of the audio signal and a total amount of the audio signal, and adjusting the loudness of the audio signal based on the metadata.
Claims20
A method of operating an audio signal processing apparatus playing content including an audio signal, the method comprising:
- receiving the audio signal;
- receiving metadata including information related to a loudness of the audio signal, the metadata including loudness distribution information, for each of a plurality of steps separated according to a loudness magnitude, indicating a ratio between an amount of an audio signal corresponding to each of the plurality of steps of the audio signal and a total amount of the audio signal;
- and
- adjusting the loudness of the audio signal based on the metadata.
A method of generating metadata for content including an audio signal, the method comprising:
- obtaining loudness distribution information of the audio signal, the loudness distribution information indicating, for each of a plurality of steps separated according to a loudness magnitude, a ratio between an amount of the audio signal corresponding to each of the plurality of steps of the audio signal and a total amount of the audio signal;
- and
- inserting the loudness distribution information in the metadata.
An audio signal processing apparatus playing content including an audio signal, the audio signal processing apparatus comprising:
- a receiver receiving the audio signal;
- and
- a processor controlling the audio signal processing apparatus, wherein the processor is configured to:
- receive metadata including information related to a loudness of the audio signal, the metadata including loudness distribution information indicating, for each of a plurality of steps separated according to a loudness magnitude, a ratio between an amount of an audio signal corresponding to each of the plurality of steps of the audio signal and a total amount of the audio signal;
- and
- adjust the loudness of the audio signal based on the metadata.
Dependencies are inferred from the claim text.