BRPI0410740A - método, aparelho e programa de computador para calcular e ajustar o volume percebido de um sinal de áudio - Google Patents

método, aparelho e programa de computador para calcular e ajustar o volume percebido de um sinal de áudio

Info

Publication number
BRPI0410740A
BRPI0410740A BRPI0410740-3A BRPI0410740A BRPI0410740A BR PI0410740 A BRPI0410740 A BR PI0410740A BR PI0410740 A BRPI0410740 A BR PI0410740A BR PI0410740 A BRPI0410740 A BR PI0410740A
Authority
BR
Brazil
Prior art keywords
audio signal
calculating
loudness
functions
program
Prior art date
Application number
BRPI0410740-3A
Other languages
English (en)
Inventor
Alan Jeffrey Seefeldt
Michael J Smithers
Brett Graham Crockett
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
Publication of BRPI0410740A publication Critical patent/BRPI0410740A/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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/27—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the analysis technique
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/005—Combinations of two or more types of control, e.g. gain control and tone control of digital or coded signals
    • 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
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/48—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 specially adapted for particular use
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/005—Tone control or bandwidth control in amplifiers of digital signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Computational Linguistics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Television Receiver Circuits (AREA)
  • Circuits Of Receivers In General (AREA)

Abstract

"MéTODO, APARELHO E PROGRAMA DE COMPUTADOR PARA CALCULAR E AJUSTAR O VOLUME PERCEBIDO DE UM SINAL DE áUDIO". Uma ou uma combinação de duas ou mais funções de modelo de volume específico selecionadas a partir de um grupo de duas ou mais das tais funções são empregadas no cálculo do volume perceptivo do sinal de áudio. A função ou funções podem ser selecionadas, por exemplo, por uma medição do grau até o qual o sinal de áudio é de banda estreita ou de banda larga. De forma alternativa ou com tal seleção a partir de um grupo de funções, um valor de ganho G¢t! é calculado, ganho este que, quando aplicado para o sinal de áudio, resulta em um volume percebido substancialmente igual ao volume de referência. O cálculo de ganho emprega um ciclo de processamento iterativo que inclui o cálculo de volume perceptivo.
BRPI0410740-3A 2003-05-28 2004-05-27 método, aparelho e programa de computador para calcular e ajustar o volume percebido de um sinal de áudio BRPI0410740A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47407703P 2003-05-28 2003-05-28
PCT/US2004/016964 WO2004111994A2 (en) 2003-05-28 2004-05-27 Method, apparatus and computer program for calculating and adjusting the perceived loudness of an audio signal

Publications (1)

Publication Number Publication Date
BRPI0410740A true BRPI0410740A (pt) 2006-06-27

Family

ID=33551475

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0410740-3A BRPI0410740A (pt) 2003-05-28 2004-05-27 método, aparelho e programa de computador para calcular e ajustar o volume percebido de um sinal de áudio

Country Status (19)

Country Link
US (1) US8437482B2 (pt)
EP (1) EP1629463B1 (pt)
JP (1) JP4486646B2 (pt)
KR (1) KR101164937B1 (pt)
CN (2) CN101819771B (pt)
AT (1) ATE371246T1 (pt)
AU (1) AU2004248544B2 (pt)
BR (1) BRPI0410740A (pt)
CA (1) CA2525942C (pt)
DE (1) DE602004008455T2 (pt)
DK (1) DK1629463T3 (pt)
ES (1) ES2290764T3 (pt)
HK (2) HK1083918A1 (pt)
IL (1) IL172108A (pt)
IN (1) IN2010KN02913A (pt)
MX (1) MXPA05012785A (pt)
PL (1) PL1629463T3 (pt)
SG (1) SG185134A1 (pt)
WO (1) WO2004111994A2 (pt)

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