Systems and methods of energy-scaled signal processing
First Claim
1. A method comprising:
- determining a first modeled high-band signal based on a low-band excitation signal of an audio signal, the audio signal including a high-band portion and a low-band portion;
determining a first set of one or more scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal;
applying a second set of one or more scaling factors based on at least one among the first set of one or more scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal;
determining a second modeled high-band signal based on the scaled high-band excitation signal;
determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal; and
outputting a data stream based on the determined gain parameters.
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Abstract
A method includes determining a first modeled high-band signal based on a low-band excitation signal of an audio signal, where the audio signal includes a high-band portion and a low-band portion. The method also includes determining scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal. The method includes applying the scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal and determining a second modeled high-band signal based on the scaled high-band excitation signal. The method includes determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal.
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Citations
31 Claims
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1. A method comprising:
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determining a first modeled high-band signal based on a low-band excitation signal of an audio signal, the audio signal including a high-band portion and a low-band portion; determining a first set of one or more scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal; applying a second set of one or more scaling factors based on at least one among the first set of one or more scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal; determining a second modeled high-band signal based on the scaled high-band excitation signal; determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal; and outputting a data stream based on the determined gain parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus comprising:
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a first synthesis filter configured to determine a first modeled high-band signal based on a low-band excitation signal of an audio signal, the audio signal including a high-band portion and a low-band portion; a scaling module configured to determine scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal and to apply the scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal; a second synthesis filter configured to determine a second modeled high-band signal based on the scaled high-band excitation signal; a gain estimator configured to determine gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal; and a multiplexer configured to output a data stream based on the determined gain parameters. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A device comprising:
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means for determining a first modeled high-band signal based on a low-band excitation signal of an audio signal, the audio signal including a high-band portion and a low-band portion; means for determining scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal; means for applying the scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal; means for determining a second modeled high-band signal based on the scaled high-band excitation signal; means for determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal; and means for outputting a data stream responsive to the means for determining gain parameters. - View Dependent Claims (28, 29)
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30. A non-transitory computer-readable medium storing instructions that are executable by a processor to cause the processor to perform operations comprising:
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determining a first modeled high-band signal based on a low-band excitation signal of an audio signal, the audio signal including a high-band portion and a low-band portion; determining scaling factors based on energy of sub-frames of the first modeled high-band signal and energy of corresponding sub-frames of the high-band portion of the audio signal; applying the scaling factors to a modeled high-band excitation signal to determine a scaled high-band excitation signal; determining a second modeled high-band signal based on the scaled high-band excitation signal; determining gain parameters based on the second modeled high-band signal and the high-band portion of the audio signal; and outputting a data stream based on the determined gain parameters. - View Dependent Claims (31)
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Specification