Method and an apparatus for processing an audio signal
First Claim
1. A method of controlling an audio signal in a decoding apparatus of an audio signal, the method comprising:
- receiving an input signal and reference information controlling a volume of the input signal;
determining a gain from a volume of the input signal and the reference information, by using a non-linear gain curve which controls a dynamic range of an output signal, the non-linear gain curve indicating relations between an input volume and output volume; and
adjusting the volume of the input signal by applying the gain to the input signal,wherein the non-linear gain curve is generated by using non-linearity information including information on a compression strength of volume, information on an expansion strength of volume, information on a maximum compression volume and information on minimum compression volume, andwherein the reference information comprises at least one of metadata indicating characteristics of the input signal, output environment information indicating characteristics of an environment in proximity to the apparatus and stored reference information being transmitted from a memory.
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Abstract
An apparatus for controlling a volume of an audio signal and method thereof are disclosed, by which a volume of an input signal can be controlled by using a non-linear gain curve and a target volume of the input signal. The present invention includes receiving an input signal and reference information controlling a volume of the input signal; and adjusting a volume of the input signal with the reference information, wherein the reference information comprises at least one of metadata indicating characteristics of the input signal, output environment information indicating characteristics of an environment in proximity to the apparatus and stored reference information being transmitted from memory.
Therefore, the present invention is able to control a volume of an input signal adaptively by using reference information, for example metadata, outside environment information and stored reference information.
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Citations
15 Claims
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1. A method of controlling an audio signal in a decoding apparatus of an audio signal, the method comprising:
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receiving an input signal and reference information controlling a volume of the input signal; determining a gain from a volume of the input signal and the reference information, by using a non-linear gain curve which controls a dynamic range of an output signal, the non-linear gain curve indicating relations between an input volume and output volume; and adjusting the volume of the input signal by applying the gain to the input signal, wherein the non-linear gain curve is generated by using non-linearity information including information on a compression strength of volume, information on an expansion strength of volume, information on a maximum compression volume and information on minimum compression volume, and wherein the reference information comprises at least one of metadata indicating characteristics of the input signal, output environment information indicating characteristics of an environment in proximity to the apparatus and stored reference information being transmitted from a memory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus of controlling an audio signal, the apparatus comprising:
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a volume determining unit measuring a volume of an input signal; a reference information measuring unit measuring a reference volume from reference information to adjust the volume of the input signal; a gain determining unit determining a gain from a volume of the input signal and the reference information, by using a non-linear gain curve which controls a dynamic range of an output signal, the non-linear gain curve indicating relations between an input volume and an output volume; and a volume control unit adjusting the volume of the input signal by applying the gain to the input signal, wherein the non-linear gain curve is generated by using non-linearity information including information on a compression strength of volume, information on an expansion strength of volume, information on a maximum compression volume and information on a minimum compression volume, and wherein the reference information comprises at least one of metadata indicating characteristics of the input signal, output environment information indicating characteristics of an environment in proximity to the apparatus and stored reference information being transmitted from a memory. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification