WO2009047675A3 - Encoding and decoding of an audio signal - Google Patents

Encoding and decoding of an audio signal Download PDF

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Publication number
WO2009047675A3
WO2009047675A3 PCT/IB2008/054016 IB2008054016W WO2009047675A3 WO 2009047675 A3 WO2009047675 A3 WO 2009047675A3 IB 2008054016 W IB2008054016 W IB 2008054016W WO 2009047675 A3 WO2009047675 A3 WO 2009047675A3
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WO
WIPO (PCT)
Prior art keywords
frame
encoding data
processor
encoder unit
encoder
Prior art date
Application number
PCT/IB2008/054016
Other languages
French (fr)
Other versions
WO2009047675A2 (en
Inventor
Schijndel Nicolle H Van
Adriaan J Rijnberg
De Par Steven L J D E Van
Bernd Edler
Original Assignee
Koninkl Philips Electronics Nv
Schijndel Nicolle H Van
Adriaan J Rijnberg
De Par Steven L J D E Van
Bernd Edler
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 Koninkl Philips Electronics Nv, Schijndel Nicolle H Van, Adriaan J Rijnberg, De Par Steven L J D E Van, Bernd Edler filed Critical Koninkl Philips Electronics Nv
Publication of WO2009047675A2 publication Critical patent/WO2009047675A2/en
Publication of WO2009047675A3 publication Critical patent/WO2009047675A3/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
    • G10L19/04—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
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/24—Variable rate codecs, e.g. for generating different qualities using a scalable representation such as hierarchical encoding or layered encoding
    • 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
    • G10L19/022—Blocking, i.e. grouping of samples in time; Choice of analysis windows; Overlap factoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (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)
  • Spectroscopy & Molecular Physics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

An encoder comprises a processor (301) which divides an input audio signal into a plurality of frames. A first encoder unit (303) generates, for each frame, first encoding data and a residual signal and a second encoder unit (305) encodes the residual signal to generate second encoding data. A combine processor (307) generates output encoded data comprising at least the first encoding data and the second encoding data. At least one of the first encoder unit (303) and the second encoder unit (305) employs a gradual frame transition extending into a neighboring frame. The encoder includes a processor (313) which determines a time interval of each frame corresponding to the gradual frame transition and a processor (311) for delaying the inclusion in the output encoded data of at least some second encoding data for the time interval to a subsequent frame. A complementary decoder is also provided. The invention may provide improved framing and reduced delay for cascaded coder/decoder arrangements.
PCT/IB2008/054016 2007-10-10 2008-10-02 Encoding and decoding of an audio signal WO2009047675A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP07118203 2007-10-10
EP07118203.4 2007-10-10

Publications (2)

Publication Number Publication Date
WO2009047675A2 WO2009047675A2 (en) 2009-04-16
WO2009047675A3 true WO2009047675A3 (en) 2009-07-02

Family

ID=40518628

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2008/054016 WO2009047675A2 (en) 2007-10-10 2008-10-02 Encoding and decoding of an audio signal

Country Status (1)

Country Link
WO (1) WO2009047675A2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006030340A2 (en) * 2004-09-17 2006-03-23 Koninklijke Philips Electronics N.V. Combined audio coding minimizing perceptual distortion
EP1793372A1 (en) * 2004-10-26 2007-06-06 Matsushita Electric Industrial Co., Ltd. Sound encoding device and sound encoding method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006030340A2 (en) * 2004-09-17 2006-03-23 Koninklijke Philips Electronics N.V. Combined audio coding minimizing perceptual distortion
EP1793372A1 (en) * 2004-10-26 2007-06-06 Matsushita Electric Industrial Co., Ltd. Sound encoding device and sound encoding method

Also Published As

Publication number Publication date
WO2009047675A2 (en) 2009-04-16

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