(19)
(11)EP 2 738 763 A3

(12)EUROPEAN PATENT APPLICATION

(88)Date of publication A3:
09.09.2015 Bulletin 2015/37

(43)Date of publication A2:
04.06.2014 Bulletin 2014/23

(21)Application number: 13190939.2

(22)Date of filing:  30.10.2013
(51)Int. Cl.: 
G10L 21/0232  (2013.01)
G10L 21/0316  (2013.01)
(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME

(30)Priority: 29.11.2012 JP 2012261704

(71)Applicant: FUJITSU LIMITED
Kawasaki-shi, Kanagawa 211-8588 (JP)

(72)Inventor:
  • Matsuo, Naoshi
    Kanagawa, 211-8588 (JP)

(74)Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

  


(54)Speech enhancement apparatus and speech enhancement method


(57) A speech enhancement apparatus includes: a noise estimating unit which estimates a noise component contained in a speech signal for each frequency band; a signal-to-noise ratio computing unit which computes, for each frequency band, a signal-to-noise ratio; a gain computing unit which selects a frequency band whose computed signal-to-noise ratio indicates that the signal component contained in the speech signal for the frequency band is recognizable, and which determines a gain indicating the degree of enhancement to be applied to the speech signal in accordance with the signal-to-noise ratio of the selected frequency band; and an enhancing unit which amplifies an amplitude component of a frequency domain signal in each frequency band in accordance with the gain, and which corrects the amplitude component of the frequency domain signal by subtracting the noise component from the amplitude component in each frequency band.