High band excitation signal generation
AssigneeQUALCOMM Incorporated
InventorsPravin Kumar Ramadas, Daniel J. Sinder, Stephane Pierre Villette, Vivek Rajendran
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Abstract
A particular method includes determining, at a device, a voicing classification of an input signal. The input signal corresponds to an audio signal. The method also includes controlling an amount of an envelope of a representation of the input signal based on the voicing classification. The method further includes modulating a white noise signal based on the controlled amount of the envelope. The method also includes generating a high band excitation signal based on the modulated white noise signal.
Claims30
A method comprising:
- determining, at a device, a voicing classification of an input signal, wherein the input signal corresponds to an audio signal;
- controlling an amount of an envelope of a representation of the input signal based on the voicing classification;
- modulating a white noise signal based on the controlled amount of the envelope;
- and
- generating a high band excitation signal based on the modulated white noise signal.
An apparatus comprising:
- a voicing classifier configured to determine a voicing classification of an input signal, wherein the input signal corresponds to an audio signal;
- an envelope adjuster configured to control an amount of an envelope of a representation of the input signal based on the voicing classification;
- a modulator configured to modulate a white noise signal based on the controlled amount of the envelope;
- and
- an output circuit configured to generate a high band excitation signal based on the modulated white noise signal.
A computer-readable storage device storing instructions that, when executed by at least one processor, cause the at least one processor to:
- determine a voicing classification of an input signal, wherein the input signal corresponds to an audio signal;
- control an amount of an envelope of a representation of the input signal based on the voicing classification;
- modulate a white noise signal based on the controlled amount of the envelope;
- and
- generate a high band excitation signal based on the modulated white noise signal.
An apparatus comprising:
- means for determining a voicing classification of an input signal, wherein the input signal corresponds to an audio signal;
- means for controlling an amount of an envelope of a representation of the input signal based on the voicing classification;
- means for modulating a white noise signal based on the controlled amount of the envelope;
- and
- means for generating a high band excitation signal based on the modulated white noise signal.
Dependencies are inferred from the claim text.