BRPI0923749A8 - Aparelho que decodifica um sinal de áudio, métodos para a decodificação e para a codificação de um sinal de áudio - Google Patents

Aparelho que decodifica um sinal de áudio, métodos para a decodificação e para a codificação de um sinal de áudio

Info

Publication number
BRPI0923749A8
BRPI0923749A8 BRPI0923749A BRPI0923749A BRPI0923749A8 BR PI0923749 A8 BRPI0923749 A8 BR PI0923749A8 BR PI0923749 A BRPI0923749 A BR PI0923749A BR PI0923749 A BRPI0923749 A BR PI0923749A BR PI0923749 A8 BRPI0923749 A8 BR PI0923749A8
Authority
BR
Brazil
Prior art keywords
audio signal
decoding
generated
gain vector
coding
Prior art date
Application number
BRPI0923749A
Other languages
English (en)
Inventor
P Ashley James
Mittal Udar
Original Assignee
Motorola Mobility Inc
Motorola Mobility Llc
Google Technology Holdings LLC
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 Motorola Mobility Inc, Motorola Mobility Llc, Google Technology Holdings LLC filed Critical Motorola Mobility Inc
Publication of BRPI0923749A2 publication Critical patent/BRPI0923749A2/pt
Publication of BRPI0923749A8 publication Critical patent/BRPI0923749A8/pt
Publication of BRPI0923749B1 publication Critical patent/BRPI0923749B1/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
    • G10L19/005—Correction of errors induced by the transmission channel, if related to the coding algorithm
    • 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
    • G10L19/008—Multichannel audio signal coding or decoding using interchannel correlation to reduce redundancy, e.g. joint-stereo, intensity-coding or matrixing
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M7/00—Conversion of a code where information is represented by a given sequence or number of digits to a code where the same, similar or subset of information is represented by a different sequence or number of digits
    • H03M7/30—Compression; Expansion; Suppression of unnecessary data, e.g. redundancy reduction

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Mathematical Physics (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

COMPUTAÇÃO DE MÁSCARA DE ESCALONAMENTO SELETIVO BASEADA EM DETECÇÃO DE PICO. Um conjunto de picos em um vetor de áudio reconstruído ? de um sinal de áudio recebido é detectado e uma máscara de escalonamento ?(?) com base no conjunto detectado de picos é gerada. Um vetor de ganho g* é gerado, com base pelo menos na máscara de escalonamento e um índice j representativo do o vetor de ganho. O sinal de áudio reconstruído é escalonado com o vetor de ganho para a produção de um sinal de áudio reconstruído escalonado. Uma distorção é gerada, com base no sinal de áudio e no sinal de áudio reconstruído escalonado. O índice do vetor de ganho com base na distorção gerada é extraído.
BRPI0923749-6A 2008-12-29 2009-12-03 Aparelho que decodifica um sinal de áudio, métodos para a decodificação e para a codificação de um sinal de áudio BRPI0923749B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US12/345,096 US8200496B2 (en) 2008-12-29 2008-12-29 Audio signal decoder and method for producing a scaled reconstructed audio signal
US12/345,096 2008-12-29
PCT/US2009/066627 WO2010077557A1 (en) 2008-12-29 2009-12-03 Selective scaling mask computation based on peak detection

Publications (3)

Publication Number Publication Date
BRPI0923749A2 BRPI0923749A2 (pt) 2016-01-19
BRPI0923749A8 true BRPI0923749A8 (pt) 2017-07-11
BRPI0923749B1 BRPI0923749B1 (pt) 2020-03-17

Family

ID=41693452

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0923749-6A BRPI0923749B1 (pt) 2008-12-29 2009-12-03 Aparelho que decodifica um sinal de áudio, métodos para a decodificação e para a codificação de um sinal de áudio

Country Status (8)

Country Link
US (1) US8200496B2 (pt)
EP (1) EP2382626B1 (pt)
JP (1) JP5283046B2 (pt)
KR (1) KR101275892B1 (pt)
CN (1) CN102272831B (pt)
BR (1) BRPI0923749B1 (pt)
ES (1) ES2430414T3 (pt)
WO (1) WO2010077557A1 (pt)

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Also Published As

Publication number Publication date
KR101275892B1 (ko) 2013-06-17
CN102272831A (zh) 2011-12-07
CN102272831B (zh) 2013-08-14
BRPI0923749A2 (pt) 2016-01-19
KR20110111442A (ko) 2011-10-11
JP2012514224A (ja) 2012-06-21
US20100169087A1 (en) 2010-07-01
US8200496B2 (en) 2012-06-12
WO2010077557A1 (en) 2010-07-08
BRPI0923749B1 (pt) 2020-03-17
EP2382626A1 (en) 2011-11-02
JP5283046B2 (ja) 2013-09-04
ES2430414T3 (es) 2013-11-20
EP2382626B1 (en) 2013-09-18

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