BR112015010023A2 - cálculo de snr de conversor de complexidade reduzida - Google Patents

cálculo de snr de conversor de complexidade reduzida

Info

Publication number
BR112015010023A2
BR112015010023A2 BR112015010023A BR112015010023A BR112015010023A2 BR 112015010023 A2 BR112015010023 A2 BR 112015010023A2 BR 112015010023 A BR112015010023 A BR 112015010023A BR 112015010023 A BR112015010023 A BR 112015010023A BR 112015010023 A2 BR112015010023 A2 BR 112015010023A2
Authority
BR
Brazil
Prior art keywords
audio
scaled
encoder
quantize
scaling factors
Prior art date
Application number
BR112015010023A
Other languages
English (en)
Other versions
BR112015010023B1 (pt
Inventor
Schug Michael
William Phillip
Original Assignee
Dolby Int Ab
Dolby Laboratories Licensing 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 Dolby Int Ab, Dolby Laboratories Licensing Corp filed Critical Dolby Int Ab
Publication of BR112015010023A2 publication Critical patent/BR112015010023A2/pt
Publication of BR112015010023B1 publication Critical patent/BR112015010023B1/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
    • G10L19/032—Quantisation or dequantisation of spectral components
    • 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
    • G10L19/02—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
    • G10L19/03—Spectral prediction for preventing pre-echo; Temporary noise shaping [TNS], e.g. in MPEG2 or MPEG4
    • 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
    • G10L19/173—Transcoding, i.e. converting between two coded representations avoiding cascaded coding-decoding

Landscapes

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

Abstract

resumo patente de invenção: "cálculo de snr de conversor de complexidade reduzida". a presente invenção refere-se à codificação/decodificação de áudio. refere-se a método e sistema para reduzir a complexidade de processo de alocação de bit utilizado no contexto de codificação/decodificação de áudio. um codificador de áudio (300) configurado para codificar um sinal de áudio de acordo com um primeiro sistema de codec de áudio está descrito. o codificador de áudio (300) compreende uma unidade de transformada (302) configurada para determinar um conjunto de coeficientes espectrais (312) com base no sinal de áudio. mais ainda, o codificador (300) compreende uma unidade de codificação de ponto flutuante (304) configurada para determinar um conjunto de fatores de escala e um conjunto de valores escalados (314), com base no conjunto de coeficientes espectrais (312); codificar o conjunto de fatores de escala para gerar um conjunto de fatores de escala codificados(313). além disso, o codificador (300) compreende unidade de alocação e quantização de bits (305, 306) configurada para determinar um número total de bits disponíveis para quantizar o conjunto de valores escalados (314); para determinar primeiro parâmetro de controle (315) indicativo de uma alocação do número total de bits disponíveis para quantizar os valores escalados do conjunto de valores escalados (314); para quantizar conjunto de valores escalados (314) de acordo com primeiro parâmetro de controle (315) para gerar conjunto de valores escalados quantizados (317).
BR112015010023-6A 2012-11-07 2013-11-04 Codificador de áudio e método para codificar um sinal de áudio BR112015010023B1 (pt)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201261723687P 2012-11-07 2012-11-07
US61/723,687 2012-11-07
PCT/EP2013/072961 WO2014072260A2 (en) 2012-11-07 2013-11-04 Reduced complexity converter snr calculation

Publications (2)

Publication Number Publication Date
BR112015010023A2 true BR112015010023A2 (pt) 2017-07-11
BR112015010023B1 BR112015010023B1 (pt) 2021-10-19

Family

ID=49517525

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112015010023-6A BR112015010023B1 (pt) 2012-11-07 2013-11-04 Codificador de áudio e método para codificar um sinal de áudio

Country Status (9)

Country Link
US (2) US9378748B2 (pt)
EP (1) EP2917909B1 (pt)
JP (2) JP6113294B2 (pt)
KR (1) KR101726205B1 (pt)
CN (1) CN104781878B (pt)
BR (1) BR112015010023B1 (pt)
IN (1) IN2015DN04001A (pt)
RU (1) RU2610588C2 (pt)
WO (1) WO2014072260A2 (pt)

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Also Published As

Publication number Publication date
RU2610588C2 (ru) 2017-02-13
KR101726205B1 (ko) 2017-04-12
EP2917909B1 (en) 2018-10-31
JP6474845B2 (ja) 2019-02-27
US9378748B2 (en) 2016-06-28
US20140188488A1 (en) 2014-07-03
KR20150066565A (ko) 2015-06-16
IN2015DN04001A (pt) 2015-10-02
BR112015010023B1 (pt) 2021-10-19
WO2014072260A2 (en) 2014-05-15
RU2015116854A (ru) 2016-11-27
CN104781878A (zh) 2015-07-15
US20150269950A1 (en) 2015-09-24
JP6113294B2 (ja) 2017-04-12
WO2014072260A3 (en) 2014-07-10
US9208789B2 (en) 2015-12-08
CN104781878B (zh) 2018-03-02
JP2015532981A (ja) 2015-11-16
JP2017138610A (ja) 2017-08-10
EP2917909A2 (en) 2015-09-16

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Legal Events

Date Code Title Description
B06F Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]
B06U Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 04/11/2013, OBSERVADAS AS CONDICOES LEGAIS.

B25G Requested change of headquarter approved

Owner name: DOLBY INTERNATIONAL AB (IE) ; DOLBY LABORATORIES LICENSING CORPORATION (US)