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WO2009038115A1 - Audio encoding device, audio encoding method, and program - Google Patents

Audio encoding device, audio encoding method, and program Download PDF

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Publication number
WO2009038115A1
WO2009038115A1 PCT/JP2008/066828 JP2008066828W WO2009038115A1 WO 2009038115 A1 WO2009038115 A1 WO 2009038115A1 JP 2008066828 W JP2008066828 W JP 2008066828W WO 2009038115 A1 WO2009038115 A1 WO 2009038115A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio encoding
audio
signal
auditory masking
program
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/JP2008/066828
Other languages
French (fr)
Japanese (ja)
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 JP2009533171A priority Critical patent/JPWO2009038115A1/en
Publication of WO2009038115A1 publication Critical patent/WO2009038115A1/en
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
    • 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
    • G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders

Landscapes

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

Abstract

It is possible to reduce degradation of audio quality when distributing a music component or a melody to a mobile terminal by a highly efficient audio encoding method. An audio encoding device includes: an auditory masking shaping unit (120) which suppresses a signal component which becomes auditorily unnecessary by the auditory masking effect among signal components of an output signal when outputting the signal; and an audio encoding unit (130) which executes an audio encoding process for audio-compressing/encoding the output signal of the auditory masking shaping unit so as to output a bit stream.
PCT/JP2008/066828 2007-09-21 2008-09-18 Audio encoding device, audio encoding method, and program Ceased WO2009038115A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009533171A JPWO2009038115A1 (en) 2007-09-21 2008-09-18 Speech coding apparatus, speech coding method, and program

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007245547 2007-09-21
JP2007-245547 2007-09-21

Publications (1)

Publication Number Publication Date
WO2009038115A1 true WO2009038115A1 (en) 2009-03-26

Family

ID=40467925

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/066828 Ceased WO2009038115A1 (en) 2007-09-21 2008-09-18 Audio encoding device, audio encoding method, and program

Country Status (2)

Country Link
JP (1) JPWO2009038115A1 (en)
WO (1) WO2009038115A1 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332496A (en) * 1993-05-21 1994-12-02 Mitsubishi Electric Corp Device and method for voice coding, decoding and post processing
JPH07221650A (en) * 1994-02-05 1995-08-18 Sony Corp Information encoding method and apparatus and information decoding method and apparatus
WO1996005592A1 (en) * 1994-08-10 1996-02-22 Qualcomm Incorporated Method and apparatus for selecting an encoding rate in a variable rate vocoder
JPH0950298A (en) * 1995-08-07 1997-02-18 Mitsubishi Electric Corp Audio encoding device and audio decoding device
JP2000315099A (en) * 1999-03-02 2000-11-14 Emudasu Systems:Kk Data compression apparatus and sound data processing method
WO2004090869A1 (en) * 2003-04-08 2004-10-21 Nec Corporation Code conversion method and device
WO2005112003A1 (en) * 2004-05-17 2005-11-24 Nokia Corporation Audio encoding with different coding frame lengths

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06332496A (en) * 1993-05-21 1994-12-02 Mitsubishi Electric Corp Device and method for voice coding, decoding and post processing
JPH07221650A (en) * 1994-02-05 1995-08-18 Sony Corp Information encoding method and apparatus and information decoding method and apparatus
WO1996005592A1 (en) * 1994-08-10 1996-02-22 Qualcomm Incorporated Method and apparatus for selecting an encoding rate in a variable rate vocoder
JPH0950298A (en) * 1995-08-07 1997-02-18 Mitsubishi Electric Corp Audio encoding device and audio decoding device
JP2000315099A (en) * 1999-03-02 2000-11-14 Emudasu Systems:Kk Data compression apparatus and sound data processing method
WO2004090869A1 (en) * 2003-04-08 2004-10-21 Nec Corporation Code conversion method and device
WO2005112003A1 (en) * 2004-05-17 2005-11-24 Nokia Corporation Audio encoding with different coding frame lengths

Also Published As

Publication number Publication date
JPWO2009038115A1 (en) 2011-01-06

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