MX2010002848A - Dise?o eficiente de bancos de filtros de mdct/imdct para aplicaciones de codificacion de voz y audio. - Google Patents

Dise?o eficiente de bancos de filtros de mdct/imdct para aplicaciones de codificacion de voz y audio.

Info

Publication number
MX2010002848A
MX2010002848A MX2010002848A MX2010002848A MX2010002848A MX 2010002848 A MX2010002848 A MX 2010002848A MX 2010002848 A MX2010002848 A MX 2010002848A MX 2010002848 A MX2010002848 A MX 2010002848A MX 2010002848 A MX2010002848 A MX 2010002848A
Authority
MX
Mexico
Prior art keywords
mdct
windowing
stage
dct
multiplications
Prior art date
Application number
MX2010002848A
Other languages
English (en)
Inventor
Yuriy Reznik
Ravi Kiran Chivukula
Original Assignee
Qualcomm Inc
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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of MX2010002848A publication Critical patent/MX2010002848A/es

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
    • G10L19/0212—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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Data Mining & Analysis (AREA)
  • Theoretical Computer Science (AREA)
  • Computational Mathematics (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Software Systems (AREA)
  • Signal Processing (AREA)
  • Algebra (AREA)
  • General Engineering & Computer Science (AREA)
  • Discrete Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Computational Linguistics (AREA)
  • Databases & Information Systems (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Complex Calculations (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

Se proporciona un codificador/decodificador m?s eficiente en el cual una transformada MDCT de N puntos se mapea en transformadas de DCT-II y/o de DCT-IV de N/2 puntos m?s peque?as con pre-multiplicaciones aisladas que pueden desplazarse a una etapa anterior o subsecuente de aplicaci?n en ventanas. Es decir, las operaciones de aplicaci?n en ventanas pueden combinarse con las multiplicaciones de primera/?ltima etapa en las funciones de MDCT/IMDCT centrales, respectivamente, reduciendo as? el n?mero total de multiplicaciones. Adem?s, el MDCT puede diezmarse sistem?ticamente por un factor de 2 utilizando una funci?n de centro de DCT-II de 5 puntos escalada uniformemente contrariamente a los centros de DCT-IV o FFT utilizados en muchos dise?os existentes de MDCT en c?decs de audio. La etapa de aplicaci?n en ventanas modificada combina los factores de una etapa de transformada y la etapa de aplicaci?n en ventanas a fin de obtener factores de aplicaci?n en ventanas sim?tricas pieza por pieza, lo cual puede representarse por un sub-conjunto de los factores de aplicaci?n en ventanas sim?tricas pieza por pieza a fin de ahorrar espacio de almacenamiento. Tales caracter?sticas ofrecen una reducci?n notable en la complejidad y menos uso de memoria que la t?cnica anterior.
MX2010002848A 2007-09-19 2008-09-19 Dise?o eficiente de bancos de filtros de mdct/imdct para aplicaciones de codificacion de voz y audio. MX2010002848A (es)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US97370907P 2007-09-19 2007-09-19
US98940007P 2007-11-20 2007-11-20
US12/212,920 US8548815B2 (en) 2007-09-19 2008-09-18 Efficient design of MDCT / IMDCT filterbanks for speech and audio coding applications
PCT/US2008/077129 WO2009039451A2 (en) 2007-09-19 2008-09-19 Efficient design of mdct / imdct filterbanks for speech and audio coding applications

Publications (1)

Publication Number Publication Date
MX2010002848A true MX2010002848A (es) 2010-04-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
MX2010002848A MX2010002848A (es) 2007-09-19 2008-09-19 Dise?o eficiente de bancos de filtros de mdct/imdct para aplicaciones de codificacion de voz y audio.

Country Status (12)

Country Link
US (1) US8548815B2 (es)
EP (1) EP2206111A2 (es)
JP (1) JP2010539625A (es)
KR (1) KR101329514B1 (es)
CN (1) CN101796578B (es)
AU (1) AU2008302070B2 (es)
BR (1) BRPI0817003A2 (es)
CA (1) CA2695741A1 (es)
HK (1) HK1143240A1 (es)
MX (1) MX2010002848A (es)
TW (1) TWI398854B (es)
WO (1) WO2009039451A2 (es)

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US9069713B2 (en) 2009-06-05 2015-06-30 Qualcomm Incorporated 4X4 transform for media coding
US9075757B2 (en) 2009-06-24 2015-07-07 Qualcomm Incorporated 16-point transform for media data coding
US9118898B2 (en) 2009-06-24 2015-08-25 Qualcomm Incorporated 8-point transform for media data coding
CN101930426B (zh) * 2009-06-24 2015-08-05 华为技术有限公司 信号处理方法、数据处理方法及装置
US9081733B2 (en) 2009-06-24 2015-07-14 Qualcomm Incorporated 16-point transform for media data coding
EP2273495A1 (en) * 2009-07-07 2011-01-12 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Digital audio signal processing system
CN102104776A (zh) * 2009-12-21 2011-06-22 康佳集团股份有限公司 一种网络电视平台mpeg音频多相合成滤波方法
US8000968B1 (en) 2011-04-26 2011-08-16 Huawei Technologies Co., Ltd. Method and apparatus for switching speech or audio signals
BR122021003887B1 (pt) 2010-08-12 2021-08-24 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E. V. Reamostrar sinais de saída de codecs de áudio com base em qmf
KR101418227B1 (ko) 2010-11-24 2014-07-09 엘지전자 주식회사 스피치 시그널 부호화 방법 및 복호화 방법
US9824066B2 (en) 2011-01-10 2017-11-21 Qualcomm Incorporated 32-point transform for media data coding
JP5762620B2 (ja) 2011-03-28 2015-08-12 ドルビー ラボラトリーズ ライセンシング コーポレイション 低周波数エフェクトチャネルのための複雑さが低減された変換
CN102568485B (zh) * 2011-12-30 2013-12-11 展讯通信（上海）有限公司 音频信号的频时转换方法及装置
JP6089878B2 (ja) * 2013-03-28 2017-03-08 富士通株式会社 直交変換装置、直交変換方法及び直交変換用コンピュータプログラムならびにオーディオ復号装置
EP2830055A1 (en) * 2013-07-22 2015-01-28 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Context-based entropy coding of sample values of a spectral envelope
CN107452391B (zh) 2014-04-29 2020-08-25 华为技术有限公司 音频编码方法及相关装置
KR102615903B1 (ko) 2017-04-28 2023-12-19 디티에스, 인코포레이티드 오디오 코더 윈도우 및 변환 구현들

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Also Published As

Publication number Publication date
WO2009039451A3 (en) 2009-05-22
KR20100063122A (ko) 2010-06-10
TWI398854B (zh) 2013-06-11
AU2008302070A1 (en) 2009-03-26
KR101329514B1 (ko) 2013-11-13
CN101796578B (zh) 2013-04-10
AU2008302070B2 (en) 2011-06-16
CN101796578A (zh) 2010-08-04
TW200926146A (en) 2009-06-16
US20090094038A1 (en) 2009-04-09
WO2009039451A2 (en) 2009-03-26
HK1143240A1 (en) 2010-12-24
EP2206111A2 (en) 2010-07-14
BRPI0817003A2 (pt) 2015-03-31
US8548815B2 (en) 2013-10-01
CA2695741A1 (en) 2009-03-26
JP2010539625A (ja) 2010-12-16

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