BR112013022988A2 - reduced complexity transform for a low frequency effects channel - Google Patents

reduced complexity transform for a low frequency effects channel

Info

Publication number
BR112013022988A2
BR112013022988A2 BR112013022988A BR112013022988A BR112013022988A2 BR 112013022988 A2 BR112013022988 A2 BR 112013022988A2 BR 112013022988 A BR112013022988 A BR 112013022988A BR 112013022988 A BR112013022988 A BR 112013022988A BR 112013022988 A2 BR112013022988 A2 BR 112013022988A2
Authority
BR
Brazil
Prior art keywords
transform
low frequency
data
reduced complexity
frequency effects
Prior art date
Application number
BR112013022988A
Other languages
Portuguese (pt)
Other versions
BR112013022988B1 (en
Inventor
Matthew C Fellers
Original Assignee
Dolby Lab 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 Lab Licensing Corp filed Critical Dolby Lab Licensing Corp
Priority claimed from PCT/US2012/029603 external-priority patent/WO2012134851A1/en
Publication of BR112013022988A2 publication Critical patent/BR112013022988A2/en
Publication of BR112013022988B1 publication Critical patent/BR112013022988B1/en

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G06F17/14—Fourier, Walsh or analogous domain transformations, e.g. Laplace, Hilbert, Karhunen-Loeve, transforms
    • G06F17/147—Discrete orthonormal transforms, e.g. discrete cosine transform, discrete sine transform, and variations therefrom, e.g. modified discrete cosine transform, integer transforms approximating the discrete cosine transform
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L19/0212—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 orthogonal transformation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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

Abstract

resumo patente de invenção: "transformada de complexidade reduzida para um canal de efeitos de baixa frequência". os recursos computacionais que são necessários para aplicar um banco de filtros baseado em transformada para sinais de áudio com largura de banda limitada são reduzidos pela execução de um processo integrado de combinar dados de entrada com valores reais com dados com valores complexos e pela aplicação de uma transformada curta para os dados com valores complexos, aplicando um banco de transformadas muito curtas para a saída do processo integrado, e derivando uma sequência de dados de saída com valores reais a partir das saídas do banco de transformadas muito curtas.patent summary: "reduced complexity transform for a low frequency effects channel". The computational resources required to apply a transform-based filter bank for bandwidth-limited audio signals are reduced by performing an integrated process of combining real-value input data with complex-value data and applying a short transform to data with complex values by applying a very short transform bank to the integrated process output, and deriving a sequence of actual value output data from the very short transform bank outputs.

BR112013022988-8A 2011-03-28 2012-03-19 Method for processing a digital audio signal, apparatus for processing a digital audio signal and storage medium BR112013022988B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US201161468373P 2011-03-28 2011-03-28
US61/468,373 2011-03-28
PCT/US2012/029603 WO2012134851A1 (en) 2011-03-28 2012-03-19 Reduced complexity transform for a low-frequency-effects channel

Publications (2)

Publication Number Publication Date
BR112013022988A2 true BR112013022988A2 (en) 2016-12-06
BR112013022988B1 BR112013022988B1 (en) 2022-03-03

Family

ID=80778248

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112013022988-8A BR112013022988B1 (en) 2011-03-28 2012-03-19 Method for processing a digital audio signal, apparatus for processing a digital audio signal and storage medium

Country Status (1)

Country Link
BR (1) BR112013022988B1 (en)

Also Published As

Publication number Publication date
BR112013022988B1 (en) 2022-03-03

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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]
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B09W Correction of the decision to grant [chapter 9.1.4 patent gazette]

Free format text: O PRESENTE PEDIDO TEVE UM PARECER DE DEFERIMENTO NOTIFICADO NA RPI NO 2657 DE07/12/2021, TENDO SIDO CONSTATADO QUE ESTA NOTIFICACAO FOI EFETUADA COM INCORRECOES, OU SEJA,AUSENCIA DO QUADRO 5 DO PARECER, OBSERVADA ATRAVES DA MENSAGEM FALE CONOSCO 997288,ASSIM RETIFICA-SE A REFERIDA PUBLICACAO.

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 19/03/2012, OBSERVADAS AS CONDICOES LEGAIS.