Systems and methods of performing gain adjustment
First Claim
1. A method of performing gain adjustment in an electronic device, the method comprising:
- determining a first set of spectral frequency values corresponding to a high-band portion of an audio signal received at the electronic device;
determining a second set of spectral frequency values that approximates the first set;
estimating a spectral distortion corresponding to a difference between the first set and the second set;
adjusting, based on the spectral distortion, a gain value corresponding to at least a portion of the audio signal; and
transmitting an encoded bitstream that includes information corresponding to the adjusted gain value and the second set.
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Abstract
A method of performing gain adjustment in an electronic device includes determining a first set of spectral frequency values and determining a second set of spectral frequency values. The first set of spectral frequency values corresponds to a high-band portion of an audio signal received at the electronic device. The second set of spectral frequency values approximates the first set of spectral frequency values in the high band portion of the audio signal. The method includes estimating a spectral distortion corresponding to a difference between the first set of spectral frequency values and the second set of spectral frequency values and adjusting, based on the spectral distortion, a gain value corresponding to at least a portion of the audio signal. The method also includes transmitting an encoded bitstream that includes information corresponding to the adjusted gain value and the second set of spectral frequency values.
14 Citations
30 Claims
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1. A method of performing gain adjustment in an electronic device, the method comprising:
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determining a first set of spectral frequency values corresponding to a high-band portion of an audio signal received at the electronic device; determining a second set of spectral frequency values that approximates the first set; estimating a spectral distortion corresponding to a difference between the first set and the second set; adjusting, based on the spectral distortion, a gain value corresponding to at least a portion of the audio signal; and transmitting an encoded bitstream that includes information corresponding to the adjusted gain value and the second set. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for performing gain adjustment, the apparatus comprising:
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an analysis filter configured to determine a first set of spectral frequency values corresponding to a high-band portion of a received audio signal; a quantizer configured to generate a second set of spectral frequency values that approximates the first set; a spectral distortion calculator configured to estimate a spectral distortion corresponding to a difference between the first set and the second set; a gain circuit configured to adjust, based on the spectral distortion, a gain value corresponding to at least a portion of the received audio signal; and a transmitter configured to transmit an encoded bitstream that includes information corresponding to the adjusted gain value and the second set. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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23. A computer-readable medium storing instructions that, when executed by a computer in an electronic device configured to perform gain adjustment, cause the computer to initiate operations comprising:
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determining a first set of spectral frequency values corresponding to a high-band portion of an audio signal received at the electronic device; determining a second set of spectral frequency values that approximates the first set; estimating a spectral distortion corresponding to a difference between the first set and the second set; adjusting a gain value corresponding to at least a portion of the audio signal based on the spectral distortion; and transmitting an encoded bitstream that includes information corresponding to the adjusted gain value and the second set. - View Dependent Claims (24)
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25. An apparatus for performing gain adjustment, the apparatus comprising:
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means for determining a first set of spectral frequency values corresponding to a high-band portion of a received audio signal; means for generating a second set of spectral frequency values that approximates the first set; means for estimating a spectral distortion corresponding to a difference between the first set and the second set; means for adjusting a gain value corresponding to at least a portion of the received audio signal based on the spectral distortion; and means for transmitting an encoded bitstream that includes information corresponding to the adjusted gain value and the second set. - View Dependent Claims (26, 27, 28, 29, 30)
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Specification