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ATE538470T1 - APPARATUS AND METHOD FOR SELECTING QUANTIZATION BANDS IN AUDIO ENCODERS - Google Patents

APPARATUS AND METHOD FOR SELECTING QUANTIZATION BANDS IN AUDIO ENCODERS

Info

Publication number
ATE538470T1
ATE538470T1 AT09008170T AT09008170T ATE538470T1 AT E538470 T1 ATE538470 T1 AT E538470T1 AT 09008170 T AT09008170 T AT 09008170T AT 09008170 T AT09008170 T AT 09008170T AT E538470 T1 ATE538470 T1 AT E538470T1
Authority
AT
Austria
Prior art keywords
processor
bisection
search
audio encoders
quantization bands
Prior art date
Application number
AT09008170T
Other languages
German (de)
Inventor
David Trainor
Original Assignee
Apt Licensing Ltd
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 Apt Licensing Ltd filed Critical Apt Licensing Ltd
Application granted granted Critical
Publication of ATE538470T1 publication Critical patent/ATE538470T1/en

Links

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
    • G10L19/032—Quantisation or dequantisation of spectral components

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (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

An apparatus for compressing an audio signal in which a processor implementing the compression algorithm conducts a binary, or bisection, search of a quantiser table in order to determine which quantised output value is most appropriate for a given input value. The processor is programmed to perform each iteration of the bisection search in three processor instructions by performing specific combinations of memory reads and computations during each instruction. The apparatus reduces power consumption and is particularly suited for use with Bluetooth transmission.
AT09008170T 2009-06-22 2009-06-22 APPARATUS AND METHOD FOR SELECTING QUANTIZATION BANDS IN AUDIO ENCODERS ATE538470T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09008170A EP2267700B1 (en) 2009-06-22 2009-06-22 Apparatus and method for selecting quantisation bands in audio encoders

Publications (1)

Publication Number Publication Date
ATE538470T1 true ATE538470T1 (en) 2012-01-15

Family

ID=41198541

Family Applications (1)

Application Number Title Priority Date Filing Date
AT09008170T ATE538470T1 (en) 2009-06-22 2009-06-22 APPARATUS AND METHOD FOR SELECTING QUANTIZATION BANDS IN AUDIO ENCODERS

Country Status (2)

Country Link
EP (1) EP2267700B1 (en)
AT (1) ATE538470T1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102737639B (en) * 2012-07-13 2014-05-28 北京理工大学 Safety communication method for voice information

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4218099A (en) * 1998-05-27 1999-12-13 Microsoft Corporation Scalable audio coder and decoder

Also Published As

Publication number Publication date
EP2267700B1 (en) 2011-12-21
EP2267700A1 (en) 2010-12-29

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