×

Apparatus and method for modifying an audio signal using harmonic locking

  • US 9,203,367 B2
  • Filed: 08/16/2012
  • Issued: 12/01/2015
  • Est. Priority Date: 02/26/2010
  • Status: Active Grant
First Claim
Patent Images

1. An apparatus for modifying an audio signal, comprising:

  • a filterbank processor configured to generate a plurality of bandpass signals based on an audio signal;

    a fundamental determiner configured to select a bandpass signal of the plurality of bandpass signals to acquire a fundamental bandpass signal;

    an overtone determiner configured to identify a bandpass signal of the plurality of bandpass signals fulfilling an overtone criterion regarding the selected fundamental bandpass signal to acquire an overtone bandpass signal associated to the selected fundamental bandpass signal;

    a signal processor configured to modify the selected fundamental bandpass signal based on a predefined modification target and configured to modify an identified overtone bandpass signal associated to the selected fundamental bandpass signal depending on the modification of the selected fundamental bandpass signal,wherein the signal processor is configured to generate an amplitude modulated signal and a frequency modulated signal for each bandpass signal of the plurality of bandpass signals, wherein the signal processor is configured to modify the frequency modulated signal of the selected fundamental bandpass signal based on the predefined modification target, and wherein the signal processor is configured to modify the frequency modulated signal of the identified overtone bandpass signal associated to the selected fundamental bandpass signal depending on the modification of the selected fundamental bandpass signal; and

    a combiner configured to combine the modified fundamental bandpass signal, the modified overtone bandpass signal and non selected bandpass signals of the plurality of bandpass signals to acquire a modified audio signal;

    whereinat least one of the filterbank processor, fundamental determiner, the overtone determiner, the signal processor, and the combiner comprises a hardware implementation.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×