WO1998035447A3 - Audio coding method and apparatus - Google Patents

Audio coding method and apparatus Download PDF

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Publication number
WO1998035447A3
WO1998035447A3 PCT/FI1998/000029 FI9800029W WO9835447A3 WO 1998035447 A3 WO1998035447 A3 WO 1998035447A3 FI 9800029 W FI9800029 W FI 9800029W WO 9835447 A3 WO9835447 A3 WO 9835447A3
Authority
WO
WIPO (PCT)
Prior art keywords
spectral
stream
spectral value
electrical signal
calculated
Prior art date
Application number
PCT/FI1998/000029
Other languages
French (fr)
Other versions
WO1998035447A2 (en
Inventor
Lin Yin
Original Assignee
Nokia Mobile Phones Ltd
Lin Yin
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 Nokia Mobile Phones Ltd, Lin Yin filed Critical Nokia Mobile Phones Ltd
Priority to AU56648/98A priority Critical patent/AU5664898A/en
Publication of WO1998035447A2 publication Critical patent/WO1998035447A2/en
Publication of WO1998035447A3 publication Critical patent/WO1998035447A3/en

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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
    • G10L19/0212—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 using orthogonal transformation
    • 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
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients

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)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)

Abstract

A method of coding an audio electrical signal using backward adaptive prediction. A first time frame of the audio electrical signal to be coded is received and transformed into the frequency domain using a modified discrete cosine transform (MDCT). The resulting frequency spectrum has 1024 spectral components. Subsequent time frames of the audio electrical signal are then received and the MDCT is applied to each in turn so as to generate a stream of spectral data values for each spectral component. For each stream, a set of prediction coefficients is calculated for each spectral value using a predetermined number of previously received consecutive spectral values of the stream. Using the set of linear prediction coefficients, a predicted spectral value is generated and the error between the predicted spectral value and the corresponding actual spectral value calculated. The calculated errors provide a coded representation of the spectral value stream.
PCT/FI1998/000029 1997-02-07 1998-01-15 Audio coding method and apparatus WO1998035447A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU56648/98A AU5664898A (en) 1997-02-07 1998-01-15 Audio coding method and apparatus

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI970553A FI970553A (en) 1997-02-07 1997-02-07 Audio coding method and device
FI970553 1997-02-07

Publications (2)

Publication Number Publication Date
WO1998035447A2 WO1998035447A2 (en) 1998-08-13
WO1998035447A3 true WO1998035447A3 (en) 1998-11-19

Family

ID=8548146

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000029 WO1998035447A2 (en) 1997-02-07 1998-01-15 Audio coding method and apparatus

Country Status (9)

Country Link
JP (1) JPH10260699A (en)
CN (1) CN1202513C (en)
AU (1) AU5664898A (en)
DE (1) DE19804584A1 (en)
FI (1) FI970553A (en)
FR (1) FR2759510A1 (en)
GB (1) GB2322776B (en)
SE (1) SE9800338L (en)
WO (1) WO1998035447A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8332216B2 (en) 2006-01-12 2012-12-11 Stmicroelectronics Asia Pacific Pte., Ltd. System and method for low power stereo perceptual audio coding using adaptive masking threshold
US7610195B2 (en) 2006-06-01 2009-10-27 Nokia Corporation Decoding of predictively coded data using buffer adaptation
WO2010104011A1 (en) * 2009-03-10 2010-09-16 日本電信電話株式会社 Encoding method, decoding method, encoding device, decoding device, program, and recording medium
CN106409299B (en) * 2012-03-29 2019-11-05 华为技术有限公司 Signal coding and decoded method and apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0673014A2 (en) * 1994-03-17 1995-09-20 Nippon Telegraph And Telephone Corporation Acoustic signal transform coding method and decoding method
US5473727A (en) * 1992-10-31 1995-12-05 Sony Corporation Voice encoding method and voice decoding method
EP0692881A1 (en) * 1993-11-09 1996-01-17 Sony Corporation Quantization apparatus, quantization method, high efficiency encoder, high efficiency encoding method, decoder, high efficiency encoder and recording media

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02131038A (en) * 1988-11-10 1990-05-18 Pioneer Electron Corp Signal transmitter
DE19526366A1 (en) * 1995-07-20 1997-01-23 Bosch Gmbh Robert Redundancy reduction method for coding multichannel signals and device for decoding redundancy-reduced multichannel signals
GB2318029B (en) * 1996-10-01 2000-11-08 Nokia Mobile Phones Ltd Audio coding method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5473727A (en) * 1992-10-31 1995-12-05 Sony Corporation Voice encoding method and voice decoding method
EP0692881A1 (en) * 1993-11-09 1996-01-17 Sony Corporation Quantization apparatus, quantization method, high efficiency encoder, high efficiency encoding method, decoder, high efficiency encoder and recording media
EP0673014A2 (en) * 1994-03-17 1995-09-20 Nippon Telegraph And Telephone Corporation Acoustic signal transform coding method and decoding method

Also Published As

Publication number Publication date
FI970553A (en) 1998-08-08
SE9800338D0 (en) 1998-02-05
DE19804584A1 (en) 1998-08-13
GB2322776B (en) 2002-03-13
CN1202513C (en) 2005-05-18
JPH10260699A (en) 1998-09-29
FI970553A0 (en) 1997-02-07
GB9802611D0 (en) 1998-04-01
SE9800338L (en) 1998-08-08
AU5664898A (en) 1998-08-26
FR2759510A1 (en) 1998-08-14
GB2322776A (en) 1998-09-02
CN1199959A (en) 1998-11-25
WO1998035447A2 (en) 1998-08-13

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