Devices, Methods and Computer Program Products for Controlling Loudness
First Claim
1. A method by an electronic device for controlling a frequency response of audio output, the method comprising:
- receiving an audio signal at the device;
estimating a sound pressure level of the audio signal based on one or more attributes or settings of the electronic device and/or the audio signal;
generating values of an adaptive loudness control curve along a range of frequencies, wherein the adaptive loudness control curve is generated based on a difference between values of an equal loudness curve at the estimated sound pressure level along the range of frequencies and values of an equal loudness curve at a reference sound pressure level along the range of frequencies;
filtering the audio signal using values of the adaptive loudness control curve; and
controlling output of the filtered audio signal as an audio output having substantially the same loudness along the range of frequencies.
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Accused Products
Abstract
A method by an electronic device for controlling a frequency response of audio output includes: receiving an audio signal at the device; estimating a sound pressure level of the audio signal based on one or more attributes or settings of the electronic device and/or the audio signal; generating values of an adaptive loudness control curve along a range of frequencies, wherein the adaptive loudness control curve is generated based on a difference between values of an equal loudness curve at the estimated sound pressure level along and values of an equal loudness curve at a reference sound pressure level; filtering the audio signal using values of the adaptive loudness control curve; and controlling output of the filtered audio signal as an audio output having substantially the same loudness along the range of frequencies.
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Citations
20 Claims
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1. A method by an electronic device for controlling a frequency response of audio output, the method comprising:
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receiving an audio signal at the device; estimating a sound pressure level of the audio signal based on one or more attributes or settings of the electronic device and/or the audio signal; generating values of an adaptive loudness control curve along a range of frequencies, wherein the adaptive loudness control curve is generated based on a difference between values of an equal loudness curve at the estimated sound pressure level along the range of frequencies and values of an equal loudness curve at a reference sound pressure level along the range of frequencies; filtering the audio signal using values of the adaptive loudness control curve; and controlling output of the filtered audio signal as an audio output having substantially the same loudness along the range of frequencies. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electronic device comprising:
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an audio source; and at least one processor configured to; receive an audio signal from the audio source; estimate a sound pressure level of the audio signal based on one or more attributes or settings of the electronic device and/or the audio signal; and generate values of an adaptive loudness control curve along a range of frequencies, wherein the adaptive loudness control curve is generated based on a difference between values of an equal loudness curve at the estimated sound pressure level along the range of frequencies and values of an equal loudness curve at a reference sound pressure level along the range of frequencies. - View Dependent Claims (16, 17, 18, 19)
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20. A computer program product for controlling frequency response for audio output by an electronic device, the computer program product comprising a non-transitory computer readable storage medium having encoded thereon instructions that, when executed on a computer, cause the computer to:
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estimate a sound pressure level associated with an audio signal received at the electronic device based on one or more attributes or settings of the electronic device and/or the audio signal; generate values of an adaptive loudness control curve along a range of frequencies, wherein the adaptive loudness control curve is generated based on a difference between values of an equal loudness curve at the estimated sound pressure level along the range of frequencies and values of an equal loudness curve at a reference sound pressure level along the range of frequencies; filter the audio signal using values of the adaptive loudness control curve; and control output of the filtered audio signal as an audio output having substantially the same loudness along the range of frequencies.
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Specification