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WO2009038170A1 - Audio processing device, audio processing method, program, and musical composition / melody distribution system - Google Patents

Audio processing device, audio processing method, program, and musical composition / melody distribution system Download PDF

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Publication number
WO2009038170A1
WO2009038170A1 PCT/JP2008/066972 JP2008066972W WO2009038170A1 WO 2009038170 A1 WO2009038170 A1 WO 2009038170A1 JP 2008066972 W JP2008066972 W JP 2008066972W WO 2009038170 A1 WO2009038170 A1 WO 2009038170A1
Authority
WO
WIPO (PCT)
Prior art keywords
audio processing
audio
processing device
program
distribution system
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/JP2008/066972
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 JP2009533197A priority Critical patent/JPWO2009038170A1/en
Publication of WO2009038170A1 publication Critical patent/WO2009038170A1/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)
  • Reverberation, Karaoke And Other Acoustics (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 processing device includes: an audio decoding unit (110) which decodes an inputted bit stream which has been compressed/encoded and outputs the stream; an auditory masking shaping unit (120) which suppresses a signal component which becomes auditorily unnecessary by the auditory masking effect among the signal components of the output signal; and an audio encoding unit (130) which executes an audio encoding process for compressing/encoding the output signal of the auditory masking shaping unit and outputs a bit stream.
PCT/JP2008/066972 2007-09-21 2008-09-19 Audio processing device, audio processing method, program, and musical composition / melody distribution system Ceased WO2009038170A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009533197A JPWO2009038170A1 (en) 2007-09-21 2008-09-19 Voice processing apparatus, voice processing method, program, and music / melody distribution system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007-245545 2007-09-21
JP2007245545 2007-09-21

Publications (1)

Publication Number Publication Date
WO2009038170A1 true WO2009038170A1 (en) 2009-03-26

Family

ID=40467979

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/066972 Ceased WO2009038170A1 (en) 2007-09-21 2008-09-19 Audio processing device, audio processing method, program, and musical composition / melody distribution system

Country Status (2)

Country Link
JP (1) JPWO2009038170A1 (en)
WO (1) WO2009038170A1 (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
JPWO2009038170A1 (en) 2011-01-06

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