BRPI0415464A8 - Aparelho e método de codificação de espectro. - Google Patents

Aparelho e método de codificação de espectro.

Info

Publication number
BRPI0415464A8
BRPI0415464A8 BRPI0415464A BRPI0415464A BRPI0415464A8 BR PI0415464 A8 BRPI0415464 A8 BR PI0415464A8 BR PI0415464 A BRPI0415464 A BR PI0415464A BR PI0415464 A BRPI0415464 A BR PI0415464A BR PI0415464 A8 BRPI0415464 A8 BR PI0415464A8
Authority
BR
Brazil
Prior art keywords
spectrum
section
encoding
encoding apparatus
calculates
Prior art date
Application number
BRPI0415464A
Other languages
English (en)
Inventor
Oshikiri Masahiro
Original Assignee
Matsushita Electric Industrial Co Ltd
Panasonic Corp
Panasonic Ip Man Co 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 Matsushita Electric Industrial Co Ltd, Panasonic Corp, Panasonic Ip Man Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of BRPI0415464A publication Critical patent/BRPI0415464A/pt
Publication of BRPI0415464A8 publication Critical patent/BRPI0415464A8/pt
Publication of BRPI0415464B1 publication Critical patent/BRPI0415464B1/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
    • 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
    • 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

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)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

APARELHO DE CODIFICAÇÃO DE ESPECTRO, APARELHO DE DECODIFICAÇÃO DE ESPECTRO, APARELHO DE TRANSMISSÃO DE SINAL ACÚSTICO, APARELHO DE RECEPÇÃO DE SINAL ACÚSTICO E MÉTODOS DOS MESMOS. Aparelho de codificação de espectro capaz de realizar a codificação em uma baixa taxa de bits e com alta qualidade é divulgado. Este aparelho é dotado de uma seção que realiza a transformação de freqüência de um primeiro sinal e calcula um primeiro espectro, uma seção que converte a freqüência de um segundo sinal e calcula um segundo espectro, uma seção que estima a forma do segundo espectro em uma banda de FL (menor igual) k <FH usando um filtro tendo um primeiro espectro em uma banda o (menor igual) k < FL como um estado interno e uma seção que codifica um perfil do segundo espectro determinado com base em um coeficiente indicando a característica do filtro nesse momento.
BRPI0415464-9A 2003-10-23 2004-10-25 Aparelho e método de codificação de espectro. BRPI0415464B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2003363080 2003-10-23
JP2003-363080 2003-10-23
PCT/JP2004/016176 WO2005040749A1 (ja) 2003-10-23 2004-10-25 スペクトル符号化装置、スペクトル復号化装置、音響信号送信装置、音響信号受信装置、およびこれらの方法

Publications (3)

Publication Number Publication Date
BRPI0415464A BRPI0415464A (pt) 2006-12-19
BRPI0415464A8 true BRPI0415464A8 (pt) 2017-06-06
BRPI0415464B1 BRPI0415464B1 (pt) 2019-04-24

Family

ID=34510022

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0415464-9A BRPI0415464B1 (pt) 2003-10-23 2004-10-25 Aparelho e método de codificação de espectro.

Country Status (9)

Country Link
US (4) US7949057B2 (pt)
EP (3) EP2221808B1 (pt)
JP (3) JP4822843B2 (pt)
KR (1) KR20060090995A (pt)
CN (3) CN101556800B (pt)
AT (1) ATE471557T1 (pt)
BR (1) BRPI0415464B1 (pt)
DE (1) DE602004027750D1 (pt)
WO (1) WO2005040749A1 (pt)

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Also Published As

Publication number Publication date
CN101556800B (zh) 2012-05-23
CN101556801A (zh) 2009-10-14
BRPI0415464A (pt) 2006-12-19
CN100507485C (zh) 2009-07-01
US20110196674A1 (en) 2011-08-11
BRPI0415464B1 (pt) 2019-04-24
EP1677088A4 (en) 2008-08-13
US8315322B2 (en) 2012-11-20
JP4822843B2 (ja) 2011-11-24
EP2221807B1 (en) 2013-03-20
CN101556801B (zh) 2012-06-20
JP2011100159A (ja) 2011-05-19
US20110194635A1 (en) 2011-08-11
US7949057B2 (en) 2011-05-24
CN1871501A (zh) 2006-11-29
US20110196686A1 (en) 2011-08-11
EP2221808B1 (en) 2012-07-11
JP5226091B2 (ja) 2013-07-03
US8208570B2 (en) 2012-06-26
ATE471557T1 (de) 2010-07-15
EP2221808A1 (en) 2010-08-25
CN101556800A (zh) 2009-10-14
JPWO2005040749A1 (ja) 2007-04-19
EP2221807A1 (en) 2010-08-25
WO2005040749A1 (ja) 2005-05-06
US20070071116A1 (en) 2007-03-29
JP5226092B2 (ja) 2013-07-03
JP2011100158A (ja) 2011-05-19
EP1677088A1 (en) 2006-07-05
EP1677088B1 (en) 2010-06-16
US8275061B2 (en) 2012-09-25
DE602004027750D1 (de) 2010-07-29
KR20060090995A (ko) 2006-08-17

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Ipc: G10L 19/02 (2013.01), G10L 21/038 (2013.01)

B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
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