Received voice processing apparatus
AssigneeFujitsu Limited
InventorMutsumi Saito
Life of this patent
Estimating the term…
Abstract
A received voice processing apparatus is provided, in which the received voice processing apparatus includes: a target spectrum calculation part for calculating, for each frequency band, a target spectrum on the basis of a compression ratio for a voice spectrum; a gain calculation part for calculating a gain value for amplifying the voice spectrum to the target spectrum; a filter coefficient calculation part for calculating a filter coefficient from the gain value; and a filer part for processing a received voice signal by using the filter coefficient.
Claims14
A received voice processing apparatus comprising:
- a voice frequency analysis part for calculating a voice spectrum by performing frequency analysis on a received voice signal;
- a target spectrum calculation part for calculating, for each frequency band, a target spectrum on the basis of a compression ratio for said voice spectrum;
- a gain calculation part for calculating, for each frequency band, a gain value for amplifying said voice spectrum to said target spectrum;
- a filter coefficient calculation part for calculating a filter coefficient from said gain value;
- and
- a filer part for processing said received voice signal by using said filter coefficient.
A received voice processing apparatus comprising:
- a voice frequency analysis part for calculating a voice spectrum by performing frequency analysis on a received voice signal;
- a surrounding noise frequency analysis part for calculating a noise spectrum by performing frequency analysis on an input signal from a transmission microphone;
- a gain calculation part for calculating, for each frequency band, a gain value for amplifying said voice spectrum according to a difference between said voice spectrum and said noise spectrum;
- a filter coefficient calculation part for calculating a filter coefficient from said gain value;
- and
- a filer part for processing said received voice signal by using said filter coefficient.
A received voice processing apparatus comprising:
- a voice frequency analysis part for calculating a voice spectrum by performing frequency analysis on a received voice signal;
- a surrounding noise frequency analysis part for calculating a noise spectrum by performing frequency analysis on an input signal from a transmission microphone;
- a masking amount calculation part for calculating masking amount by using said noise spectrum and said voice spectrum;
- a gain calculation part for calculating, for each frequency band, a gain value for amplifying said voice spectrum according to said masking amount;
- a filter coefficient calculation part for calculating a filter coefficient from said gain value;
- and
- a filer part for processing said received voice signal by using said filter coefficient.
Dependencies are inferred from the claim text.