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WO2009038158A1 - 音声復号装置、音声復号方法、プログラム及び携帯端末 - Google Patents

音声復号装置、音声復号方法、プログラム及び携帯端末 Download PDF

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Publication number
WO2009038158A1
WO2009038158A1 PCT/JP2008/066948 JP2008066948W WO2009038158A1 WO 2009038158 A1 WO2009038158 A1 WO 2009038158A1 JP 2008066948 W JP2008066948 W JP 2008066948W WO 2009038158 A1 WO2009038158 A1 WO 2009038158A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio decoding
signal
output
audio
mobile terminal
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2008/066948
Other languages
English (en)
French (fr)
Inventor
Kazunori Ozawa
Toshiyuki Nomura
Hironori Ito
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
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
Application filed by NEC Corp filed Critical NEC Corp
Priority to JP2009533189A priority Critical patent/JPWO2009038158A1/ja
Publication of WO2009038158A1 publication Critical patent/WO2009038158A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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
    • G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/26—Pre-filtering or post-filtering
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00—Speech or voice signal processing techniques 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
    • G10L21/0264—Noise filtering characterised by the type of parameter measurement, e.g. correlation techniques, zero crossing techniques or predictive techniques
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H04M1/72—Mobile telephones; Cordless telephones, i.e. devices for establishing wireless links to base stations without route selection
    • H04M1/724—User interfaces specially adapted for cordless or mobile telephones
    • H04M1/72403—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality
    • H04M1/72442—User interfaces specially adapted for cordless or mobile telephones with means for local support of applications that increase the functionality for playing music files

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Telephone Function (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

　高効率の音声符号化方式で携帯端末に対し、音楽やメロディの配信を行う際の音質の劣化を軽減する。音声復号装置は、圧縮符号化された入力ビットストリームを復号し出力する音声復号化処理部１１０と、前記音声復号部の出力信号の信号成分のうち、聴覚マスキング効果により聴覚的に不要となる信号成分を抑圧して出力する聴覚マスキング整形処理部１２０と、復号信号の特徴を分析し、前記周波数変換部に出力するか、前記音声復号化処理部の出力をそのまま出力するかを判別する切替部２５０＿１、２５０＿２と、を備える（図１）。
PCT/JP2008/066948 2007-09-21 2008-09-19 音声復号装置、音声復号方法、プログラム及び携帯端末 Ceased WO2009038158A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009533189A JPWO2009038158A1 (ja) 2007-09-21 2008-09-19 音声復号装置、音声復号方法、プログラム及び携帯端末

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007245546 2007-09-21
JP2007-245546 2007-09-21

Publications (1)

Publication Number Publication Date
WO2009038158A1 true WO2009038158A1 (ja) 2009-03-26

Family

ID=40467967

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/066948 Ceased WO2009038158A1 (ja) 2007-09-21 2008-09-19 音声復号装置、音声復号方法、プログラム及び携帯端末

Country Status (2)

Country Link
JP (1) JPWO2009038158A1 (ja)
WO (1) WO2009038158A1 (ja)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332496A (ja) * 1993-05-21 1994-12-02 Mitsubishi Electric Corp 音声符号化装置、音声復号化装置、音声後処理装置及びこれらの方法
JPH07221650A (ja) * 1994-02-05 1995-08-18 Sony Corp 情報符号化方法及び装置並びに情報復号化方法及び装置
JPH0950298A (ja) * 1995-08-07 1997-02-18 Mitsubishi Electric Corp 音声符号化装置及び音声復号化装置
JP2000315099A (ja) * 1999-03-02 2000-11-14 Emudasu Systems:Kk データ圧縮装置及び音データ処理方法
WO2004090869A1 (ja) * 2003-04-08 2004-10-21 Nec Corporation 符号変換方法及び装置
WO2006041055A1 (ja) * 2004-10-13 2006-04-20 Matsushita Electric Industrial Co., Ltd. スケーラブル符号化装置、スケーラブル復号装置及びスケーラブル符号化方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332496A (ja) * 1993-05-21 1994-12-02 Mitsubishi Electric Corp 音声符号化装置、音声復号化装置、音声後処理装置及びこれらの方法
JPH07221650A (ja) * 1994-02-05 1995-08-18 Sony Corp 情報符号化方法及び装置並びに情報復号化方法及び装置
JPH0950298A (ja) * 1995-08-07 1997-02-18 Mitsubishi Electric Corp 音声符号化装置及び音声復号化装置
JP2000315099A (ja) * 1999-03-02 2000-11-14 Emudasu Systems:Kk データ圧縮装置及び音データ処理方法
WO2004090869A1 (ja) * 2003-04-08 2004-10-21 Nec Corporation 符号変換方法及び装置
WO2006041055A1 (ja) * 2004-10-13 2006-04-20 Matsushita Electric Industrial Co., Ltd. スケーラブル符号化装置、スケーラブル復号装置及びスケーラブル符号化方法

Also Published As

Publication number Publication date
JPWO2009038158A1 (ja) 2011-01-06

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