Patent ID: 9264003
Filing Date: 2016-02-16
CPC Classification: G10H,G10L,H03G

Claim Text:
1. Apparatus for modifying an audio signal, comprising: an envelope shape determiner configured to determine envelope shape coefficients based on a frequency domain audio signal representing a time domain input audio signal; a filterbank processor configured to generate a plurality of bandpass signals in a subband domain based on the frequency domain audio signal; a signal processor configured to modify a subband domain bandpass signal of the plurality of subband domain bandpass signals based on a predefined modification target; a combiner configured to combine at least a subset of the plurality of subband domain bandpass signals to acquire a time domain audio signal; and an envelope shaper configured to shape an envelope of the time domain audio signal based on the envelope shape coefficients, to shape an envelope of the plurality of subband domain bandpass signals comprising the modified subband domain bandpass signal based on the envelope shape coefficients or to shape an envelope of the plurality of subband domain bandpass signals based on the envelope shape coefficients before a subband domain bandpass signal is modified by the signal processor to acquire a shaped audio signal; wherein the envelop shape determiner is configured to determine the envelope shape coefficients based on a prediction over frequency of the frequency domain audio signal; and wherein at least one of the envelope shape determiner, the filterbank processor, the signal processor, the combiner, and the envelope shaper comprises a hardware implementation.