WO2008081920A1 - Voice enhancement processing device - Google Patents

Voice enhancement processing device Download PDF

Info

Publication number
WO2008081920A1
WO2008081920A1 PCT/JP2007/075251 JP2007075251W WO2008081920A1 WO 2008081920 A1 WO2008081920 A1 WO 2008081920A1 JP 2007075251 W JP2007075251 W JP 2007075251W WO 2008081920 A1 WO2008081920 A1 WO 2008081920A1
Authority
WO
WIPO (PCT)
Prior art keywords
band
input
signal
unit
frequency
Prior art date
Application number
PCT/JP2007/075251
Other languages
French (fr)
Japanese (ja)
Inventor
Yoshitaka Nakajima
Kazuo Ueda
Kimio Shiraishi
Original Assignee
Kyushu University, National University Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2007265290A external-priority patent/JP5046233B2/en
Application filed by Kyushu University, National University Corporation filed Critical Kyushu University, National University Corporation
Publication of WO2008081920A1 publication Critical patent/WO2008081920A1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Processing of the speech or voice signal to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L21/0232—Processing in the frequency domain

Abstract

[PROBLEMS] To provide clear, natural voice by compressing the high-frequency components of an input sound inputted into a public broadcast device, a public-address device, a hearing aid, or a telephone to a low-frequency band. [MEANS FOR SOLVING PROBLEMS] A voice enhancement processing device comprises an input band limiting unit, an input intra-band power computing unit, a harmonic code computing unit, an intra-band signal multiplying unit, and output signal limiting unit, and a signal adding unit. The voice enhancement processing device is characterized in that the input band limiting unit has a first band filter for passing a predetermined frequency component of the input signal as it is, the input intra-band power computing unit has a second band filter whose lower limit frequency is set at a frequency value equal to or higher than the upper limit frequency of the first band filter and adapted for passing the input signal and a power envelope extracting section for extracting a power envelop signal of the output signal of the second band filter, the harmonic code computing unit has a given pass frequency band and is composed of a harmonic feature extracting filter for passing the input signal and a code extracting section for extracting the code of the output signal of the harmonic feature extracting filter, the intra-band signal multiplying unit has a function of multiplying the output signals of the input intra-band power computing unit and the harmonic feature code computing unit, the output signal limiting unit is composed of a compressed band filter whose pass frequency band is the frequency band to which the frequency components of the input signal is compressed, and the signal adding unit has a function of adding the output of the input band limiting unit and the output of the output signal limiting unit.
PCT/JP2007/075251 2007-01-05 2007-12-28 Voice enhancement processing device WO2008081920A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2007-000582 2007-01-05
JP2007000582 2007-01-05
JP2007265290A JP5046233B2 (en) 2007-01-05 2007-10-11 Speech enhancement processor
JP2007-265290 2007-10-11

Publications (1)

Publication Number Publication Date
WO2008081920A1 true WO2008081920A1 (en) 2008-07-10

Family

ID=39588600

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/075251 WO2008081920A1 (en) 2007-01-05 2007-12-28 Voice enhancement processing device

Country Status (1)

Country Link
WO (1) WO2008081920A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07501897A (en) * 1991-12-16 1995-02-23 マッキーチャーン、ロバート　エイチ Audio information extraction device
JPH07107053A (en) * 1993-10-07 1995-04-21 Hitachi Denshi Ltd Signal processing method
JPH07160299A (en) * 1993-12-06 1995-06-23 Hitachi Denshi Ltd Sound signal band compander and band compression transmission system and reproducing system for sound signal
JPH1020886A (en) * 1996-07-01 1998-01-23 Takayoshi Hirata System for detecting harmonic waveform component existing in waveform data
JP2003280696A (en) * 2002-03-19 2003-10-02 Matsushita Electric Ind Co Ltd Apparatus and method for emphasizing voice
JP2005202354A (en) * 2003-12-19 2005-07-28 Toudai Tlo Ltd Signal analysis method
JP2005528647A (en) * 2002-05-31 2005-09-22 ヴォイスエイジ・コーポレーション Synthetic speech frequency selective pitch enhancement method and device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07501897A (en) * 1991-12-16 1995-02-23 マッキーチャーン、ロバート　エイチ Audio information extraction device
JPH07107053A (en) * 1993-10-07 1995-04-21 Hitachi Denshi Ltd Signal processing method
JPH07160299A (en) * 1993-12-06 1995-06-23 Hitachi Denshi Ltd Sound signal band compander and band compression transmission system and reproducing system for sound signal
JPH1020886A (en) * 1996-07-01 1998-01-23 Takayoshi Hirata System for detecting harmonic waveform component existing in waveform data
JP2003280696A (en) * 2002-03-19 2003-10-02 Matsushita Electric Ind Co Ltd Apparatus and method for emphasizing voice
JP2005528647A (en) * 2002-05-31 2005-09-22 ヴォイスエイジ・コーポレーション Synthetic speech frequency selective pitch enhancement method and device
JP2005202354A (en) * 2003-12-19 2005-07-28 Toudai Tlo Ltd Signal analysis method

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