BRPI0517246A - aparelho de codificação escalável, aparelho de decodificação escalável e métodos para os mesmos - Google Patents

aparelho de codificação escalável, aparelho de decodificação escalável e métodos para os mesmos

Info

Publication number
BRPI0517246A
BRPI0517246A BRPI0517246-2A BRPI0517246A BRPI0517246A BR PI0517246 A BRPI0517246 A BR PI0517246A BR PI0517246 A BRPI0517246 A BR PI0517246A BR PI0517246 A BRPI0517246 A BR PI0517246A
Authority
BR
Brazil
Prior art keywords
scalable
methods
pitch frequency
mdci
encoding
Prior art date
Application number
BRPI0517246-2A
Other languages
English (en)
Inventor
Masahiro Oshikiri
Original Assignee
Matsushita Electric Industrial 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 filed Critical Matsushita Electric Industrial Co Ltd
Publication of BRPI0517246A publication Critical patent/BRPI0517246A/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
    • G10L19/04—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
    • G10L19/04—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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] 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
    • G10L19/04—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
    • G10L19/04—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
    • G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
    • G10L19/09—Long term prediction, i.e. removing periodical redundancies, e.g. by using adaptive codebook or pitch predictor

Landscapes

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

Abstract

APARELHO DE CODIFICAçãO ESCALáVEL, APARELHO DE DECODIFICAçãO ESCALáVEL E MéTODOS PARA OS MESMOS. A presente invenção refere-se a um aparelho de codificação escalável capaz de reduzir as taxas de bits dos parâmetros codificados, e também capaz de eficientemente codificar sinais de áudio uniformes nos quais várias estruturas harmónicas são coexistentes. No aparelho, uma parte de análise MDCI (111) analisa por MDCI um sinal de áudio (S15) para processos de conversão / codificação. Uma parte de conversão de freqúência de pitch (112) determina o inverso de um período de pitch para calcular uma freqúência de pitch. Uma parte de seleção (113) seleciona espectros localizados nas freqúências que são múltiplos integrais da freqúência de pitch. Uma segunda parte de codificação de camada (106) codifica os espectros selecionados.
BRPI0517246-2A 2004-10-28 2005-10-26 aparelho de codificação escalável, aparelho de decodificação escalável e métodos para os mesmos BRPI0517246A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004314230 2004-10-28
PCT/JP2005/019661 WO2006046587A1 (ja) 2004-10-28 2005-10-26 スケーラブル符号化装置、スケーラブル復号化装置、およびこれらの方法

Publications (1)

Publication Number Publication Date
BRPI0517246A true BRPI0517246A (pt) 2008-10-07

Family

ID=36227828

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0517246-2A BRPI0517246A (pt) 2004-10-28 2005-10-26 aparelho de codificação escalável, aparelho de decodificação escalável e métodos para os mesmos

Country Status (9)

Country Link
US (1) US8019597B2 (pt)
EP (1) EP1806736B1 (pt)
JP (1) JP5036317B2 (pt)
KR (1) KR20070083856A (pt)
CN (1) CN101044553B (pt)
AT (1) ATE480851T1 (pt)
BR (1) BRPI0517246A (pt)
DE (1) DE602005023503D1 (pt)
WO (1) WO2006046587A1 (pt)

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Also Published As

Publication number Publication date
JPWO2006046587A1 (ja) 2008-05-22
US20090125300A1 (en) 2009-05-14
EP1806736A4 (en) 2008-03-19
CN101044553A (zh) 2007-09-26
KR20070083856A (ko) 2007-08-24
DE602005023503D1 (de) 2010-10-21
EP1806736B1 (en) 2010-09-08
WO2006046587A1 (ja) 2006-05-04
ATE480851T1 (de) 2010-09-15
EP1806736A1 (en) 2007-07-11
JP5036317B2 (ja) 2012-09-26
CN101044553B (zh) 2011-06-01
US8019597B2 (en) 2011-09-13

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Legal Events

Date Code Title Description
B11A Dismissal acc. art.33 of ipl - examination not requested within 36 months of filing
B11Y Definitive dismissal - extension of time limit for request of examination expired [chapter 11.1.1 patent gazette]
B15K Others concerning applications: alteration of classification

Free format text: PROCEDIMENTO AUTOMATICO DE RECLASSIFICACAO. AS CLASSIFICACOES IPC ANTERIORES ERAM: G10L 19/02; G10L 11/00; G10L 11/04; G10L 19/12.

Ipc: G10L 19/24 (2013.01), G10L 19/06 (2013.01), G10L 1

Ipc: G10L 19/24 (2013.01), G10L 19/06 (2013.01), G10L 1