Back to results
US 2010/0076771 A1Published application
Voice signal processing apparatus and voice signal processing method
AssigneeFujitsu Limited
InventorFumio AMANO
Life of this patent
Estimating the term…
Abstract
A voice signal processing apparatus and method includes determining maximum amplitude values of a plurality of different voice frame signals obtained by giving different amounts of phase shift to frequency components of voice frame signals having a predetermined length which are divided from a digital voice signal, and selecting a voice frame signal whose maximum amplitude value is the minimum from among the amplitude values of the plurality of different voice frame signals.
Claims14
A voice signal processing apparatus, comprising:
- a maximum amplitude value determining unit that determines maximum amplitude values of a plurality of different voice frame signals obtained by giving different amounts of phase shift to frequency components of voice frame signals having a predetermined length which are divided from a digital voice signal;
- and
- a selecting unit that selects a voice frame signal having a maximum amplitude value that is a minimum among the amplitude values of the plurality of different voice frame signals.
A voice signal processing apparatus, comprising:
- a maximum value reducing unit that gives phase shift amounts to frequency components of voice frame signals having a predetermined length which are divided from a digital voice signal to reduce maximum amplitude values of the voice frame signals;
- and
- a signal amplifying unit that amplifies the voice frame signals having the reduced maximum amplitude values at a gain that is determined based on the reduced maximum amplitude values of the voice frame signals.
A voice signal processing method, comprising:
- dividing a digital voice signal into voice frame signals having a predetermined length;
- determining maximum amplitude values of a plurality of different voice frame signals obtained by giving different amounts of phase shift to frequency components of the divided voice frame signals;
- and
- selecting a voice frame signal whose maximum amplitude value is a minimum among the amplitude values of the plurality of different voice frame signals.
1 more element
Dependencies are inferred from the claim text.