BRPI0311601B8 - "aparelho e método decodificador de áudio" - Google Patents

"aparelho e método decodificador de áudio"

Info

Publication number
BRPI0311601B8
BRPI0311601B8 BRPI0311601A BRPI0311601A BRPI0311601B8 BR PI0311601 B8 BRPI0311601 B8 BR PI0311601B8 BR PI0311601 A BRPI0311601 A BR PI0311601A BR PI0311601 A BRPI0311601 A BR PI0311601A BR PI0311601 B8 BRPI0311601 B8 BR PI0311601B8
Authority
BR
Brazil
Prior art keywords
energy
real
calculations
correcting
complex
Prior art date
Application number
BRPI0311601A
Other languages
English (en)
Inventor
Hann Kuah Kim
Seng Chong Kok
Serizawa Masahiro
Tsushima Mineo
Tanaka Naoya
Shimada Osamu
Hong Neo Sua
Norimatsu Takeshi
Nomura Toshiyuki
Takamizawa Yuichiro
Original Assignee
Matsushita Electric Ind Co Ltd
Nec Corp
Panasonic 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 Matsushita Electric Ind Co Ltd, Nec Corp, Panasonic Corp filed Critical Matsushita Electric Ind Co Ltd
Publication of BRPI0311601B1 publication Critical patent/BRPI0311601B1/pt
Publication of BRPI0311601B8 publication Critical patent/BRPI0311601B8/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
    • 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
    • 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
    • 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

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Stereophonic System (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

"aparelho e método decodificador de áudio e programa para habilitar computador". um corretor de energia (105) para corrigir energia-alvo de componentes de alta-freqüência e um calculador de coeficiente de correção (106) para calcular um coeficiente de correção de energia a partir de sinais de sub-banda de baixa-freqüência são recém providos. estes processadores realizam um processo para corrigir energia-alvo requerida quando um processo de expansão de banda é realizado somente com respeito ao número real. assim, podem ser usados um filtro combinador de sub-banda real e um expansor de banda real que requerem pequena quantidade de cálculos, ao invés de um filtro de sub-banda complexo e um expansor de banda complexo, ainda mantendo elevado nivel de qualidade de som, sendo que assim a quantidade requerida de cálculos e o tamanho do aparelho poderão ser reduzidos.
BRPI0311601A 2002-07-19 2003-06-24 "aparelho e método decodificador de áudio" BRPI0311601B8 (pt)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2002-210945 2002-07-19
JP2002210945 2002-07-19
JP2002273010 2002-09-19
JP2002-273010 2002-09-19
PCT/JP2003/007962 WO2004010415A1 (ja) 2002-07-19 2003-06-24 オーディオ復号装置と復号方法およびプログラム

Publications (2)

Publication Number Publication Date
BRPI0311601B1 BRPI0311601B1 (pt) 2017-12-12
BRPI0311601B8 true BRPI0311601B8 (pt) 2018-02-14

Family

ID=30772215

Family Applications (2)

Application Number Title Priority Date Filing Date
BR0311601-8A BR0311601A (pt) 2002-07-19 2003-06-24 Aparelho e método decodificador de áudio e programa para habilitar computador
BRPI0311601A BRPI0311601B8 (pt) 2002-07-19 2003-06-24 "aparelho e método decodificador de áudio"

Family Applications Before (1)

Application Number Title Priority Date Filing Date
BR0311601-8A BR0311601A (pt) 2002-07-19 2003-06-24 Aparelho e método decodificador de áudio e programa para habilitar computador

Country Status (13)

Country Link
US (2) US7555434B2 (pt)
EP (2) EP2019391B1 (pt)
JP (1) JP3579047B2 (pt)
KR (1) KR100602975B1 (pt)
CN (1) CN1328707C (pt)
AT (1) ATE428167T1 (pt)
AU (1) AU2003244168A1 (pt)
BR (2) BR0311601A (pt)
CA (1) CA2453814C (pt)
DE (1) DE60327039D1 (pt)
HK (1) HK1082092A1 (pt)
TW (1) TWI268665B (pt)
WO (1) WO2004010415A1 (pt)

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CA2453814C (en) 2010-03-09
ATE428167T1 (de) 2009-04-15
TW200405673A (en) 2004-04-01
US7941319B2 (en) 2011-05-10
AU2003244168A1 (en) 2004-02-09
EP1439524A1 (en) 2004-07-21
HK1082092A1 (en) 2006-05-26
BRPI0311601B1 (pt) 2017-12-12
KR100602975B1 (ko) 2006-07-20
TWI268665B (en) 2006-12-11
US20050171785A1 (en) 2005-08-04
EP1439524B1 (en) 2009-04-08
US20090259478A1 (en) 2009-10-15
US7555434B2 (en) 2009-06-30
CN1328707C (zh) 2007-07-25
EP2019391A2 (en) 2009-01-28
EP2019391A3 (en) 2009-04-01
EP1439524A4 (en) 2005-06-08
CN1669073A (zh) 2005-09-14
WO2004010415A1 (ja) 2004-01-29
KR20050010744A (ko) 2005-01-28
JP3579047B2 (ja) 2004-10-20
DE60327039D1 (de) 2009-05-20
JPWO2004010415A1 (ja) 2005-11-17
EP2019391B1 (en) 2013-01-16
BR0311601A (pt) 2005-02-22

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