HK1070457A1 - Method of improving transient performance of audiocoding systems by reducing pre-noise - Google Patents

Method of improving transient performance of audiocoding systems by reducing pre-noise

Info

Publication number
HK1070457A1
HK1070457A1 HK05102947A HK05102947A HK1070457A1 HK 1070457 A1 HK1070457 A1 HK 1070457A1 HK 05102947 A HK05102947 A HK 05102947A HK 05102947 A HK05102947 A HK 05102947A HK 1070457 A1 HK1070457 A1 HK 1070457A1
Authority
HK
Hong Kong
Prior art keywords
transient
audio signal
noise
audio
transform
Prior art date
Application number
HK05102947A
Other languages
English (en)
Inventor
Brett Crockett
Original Assignee
Dolby Lab Licensing 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 Dolby Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Publication of HK1070457A1 publication Critical patent/HK1070457A1/xx

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
    • G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/04—Time compression or expansion
    • 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
    • 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
    • G10L19/02—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
    • 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
    • G10L19/025—Detection of transients or attacks for time/frequency resolution switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analogue/Digital Conversion (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Noise Elimination (AREA)
HK05102947A 2001-05-10 2005-04-08 Method of improving transient performance of audiocoding systems by reducing pre-noise HK1070457A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US29028601P 2001-05-10 2001-05-10
PCT/US2002/012957 WO2002093560A1 (en) 2001-05-10 2002-04-25 Improving transient performance of low bit rate audio coding systems by reducing pre-noise

Publications (1)

Publication Number Publication Date
HK1070457A1 true HK1070457A1 (en) 2005-06-17

Family

ID=23115313

Family Applications (1)

Application Number Title Priority Date Filing Date
HK05102947A HK1070457A1 (en) 2001-05-10 2005-04-08 Method of improving transient performance of audiocoding systems by reducing pre-noise

Country Status (14)

Country Link
US (1) US7313519B2 (xx)
EP (1) EP1386312B1 (xx)
JP (1) JP4290997B2 (xx)
KR (1) KR100945673B1 (xx)
CN (1) CN1312662C (xx)
AT (1) ATE387000T1 (xx)
AU (1) AU2002307533B2 (xx)
CA (1) CA2445480C (xx)
DE (1) DE60225130T2 (xx)
DK (1) DK1386312T3 (xx)
ES (1) ES2298394T3 (xx)
HK (1) HK1070457A1 (xx)
MX (1) MXPA03010237A (xx)
WO (1) WO2002093560A1 (xx)

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Publication number Publication date
EP1386312A1 (en) 2004-02-04
CA2445480A1 (en) 2002-11-21
DE60225130D1 (de) 2008-04-03
JP2004528597A (ja) 2004-09-16
CN1552060A (zh) 2004-12-01
DK1386312T3 (da) 2008-06-09
ES2298394T3 (es) 2008-05-16
AU2002307533B2 (en) 2008-01-31
WO2002093560A1 (en) 2002-11-21
MXPA03010237A (es) 2004-03-16
EP1386312B1 (en) 2008-02-20
US7313519B2 (en) 2007-12-25
CN1312662C (zh) 2007-04-25
KR100945673B1 (ko) 2010-03-05
DE60225130T2 (de) 2009-02-26
JP4290997B2 (ja) 2009-07-08
KR20040034604A (ko) 2004-04-28
ATE387000T1 (de) 2008-03-15
US20040133423A1 (en) 2004-07-08
CA2445480C (en) 2011-04-12

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