BR0014642A - Codificação de envelope espectral usando resolução de tempo-frequência variável e mudança de tempo-frequência - Google Patents

Codificação de envelope espectral usando resolução de tempo-frequência variável e mudança de tempo-frequência

Info

Publication number
BR0014642A
BR0014642A BR0014642-0A BR0014642A BR0014642A BR 0014642 A BR0014642 A BR 0014642A BR 0014642 A BR0014642 A BR 0014642A BR 0014642 A BR0014642 A BR 0014642A
Authority
BR
Brazil
Prior art keywords
time
frequency
spectral envelope
envelope encoding
frequency change
Prior art date
Application number
BR0014642-0A
Other languages
English (en)
Other versions
BRPI0014642B1 (pt
Inventor
Lars Gustaf Liljeryd
Kristofer Kjorling
Per Ekstrand
Fredrik Henn
Original Assignee
Coding Technologies Sweden Ab
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20417226&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=BR0014642(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from SE9903552A external-priority patent/SE9903552D0/xx
Application filed by Coding Technologies Sweden Ab filed Critical Coding Technologies Sweden Ab
Publication of BR0014642A publication Critical patent/BR0014642A/pt
Publication of BRPI0014642B1 publication Critical patent/BRPI0014642B1/pt

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
    • G10L19/022—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
    • 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
    • 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
    • G10L19/0204—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 subband decomposition
    • G10L19/0208—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
    • G10L19/022—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
    • G10L19/032—Quantisation or dequantisation of spectral components
    • G10L19/035—Scalar quantisation
    • 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038—Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/18—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being spectral information of each sub-band

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Electrophonic Musical Instruments (AREA)

Abstract

"CODIFICAçãO DE ENVELOPE ESPECTRAL USANDO RESOLUçãO DE TEMPO-FREQuêNCIA VARIáVEL E MUDANçA DE TEMPO-FREQuêNCIA". A presente invenção provê um novo método e aparelho para codificação de um envelope espectral. A invenção mostra como realizar e sinalizar de modo compacto um mapeamento de tempo-freq³ência de representação de envelope, e adicionalmente codificar dados de envelope espectral usando codificação direcional de tempo-freq³ência adaptativa o método é aplicável a ambos, sistema de codificação de áudio natural e sistema de codificação de voz, e sendo especialmente adequado para codificadores usando SBR [WO 98/ 57436] ou outros métodos de reconstrução de alta freq³ência.
BRPI0014642A 1999-10-01 2000-09-29 codificação de envelope espectral usando resolução de tempo-frequência variável e mudança de tempo-frequência BRPI0014642B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9903552A SE9903552D0 (sv) 1999-01-27 1999-10-01 Efficient spectral envelope coding using dynamic scalefactor grouping and time/frequency switching
PCT/SE2000/000158 WO2000045378A2 (en) 1999-01-27 2000-01-26 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
PCT/SE2000/001887 WO2001026095A1 (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching

Publications (2)

Publication Number Publication Date
BR0014642A true BR0014642A (pt) 2002-06-18
BRPI0014642B1 BRPI0014642B1 (pt) 2016-04-26

Family

ID=20417226

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0014642A BRPI0014642B1 (pt) 1999-10-01 2000-09-29 codificação de envelope espectral usando resolução de tempo-frequência variável e mudança de tempo-frequência

Country Status (14)

Country Link
US (3) US6978236B1 (pt)
EP (1) EP1216474B1 (pt)
JP (3) JP4035631B2 (pt)
CN (1) CN1172293C (pt)
AT (1) ATE271250T1 (pt)
AU (1) AU7821200A (pt)
BR (1) BRPI0014642B1 (pt)
DE (1) DE60012198T2 (pt)
DK (1) DK1216474T3 (pt)
ES (1) ES2223591T3 (pt)
HK (1) HK1049401B (pt)
PT (1) PT1216474E (pt)
RU (1) RU2236046C2 (pt)
WO (1) WO2001026095A1 (pt)

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