IT1257065B - Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi. - Google Patents

Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi.

Info

Publication number
IT1257065B
IT1257065B ITTO920658A ITTO920658A IT1257065B IT 1257065 B IT1257065 B IT 1257065B IT TO920658 A ITTO920658 A IT TO920658A IT TO920658 A ITTO920658 A IT TO920658A IT 1257065 B IT1257065 B IT 1257065B
Authority
IT
Italy
Prior art keywords
coder
analysis techniques
low delay
audio signals
synthesis analysis
Prior art date
Application number
ITTO920658A
Other languages
English (en)
Inventor
De Iacovo Rosario Drogo
Roberto Montagna
Original Assignee
Sip
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 Sip filed Critical Sip
Publication of ITTO920658A0 publication Critical patent/ITTO920658A0/it
Priority to ITTO920658A priority Critical patent/IT1257065B/it
Priority to US08/065,990 priority patent/US5321793A/en
Priority to JP5167370A priority patent/JPH0683395A/ja
Priority to DE69317958T priority patent/DE69317958T2/de
Priority to AT93112293T priority patent/ATE165183T1/de
Priority to EP93112293A priority patent/EP0582921B1/en
Priority to DE0582921T priority patent/DE582921T1/de
Priority to CA002101700A priority patent/CA2101700C/en
Priority to ES93112293T priority patent/ES2068172T3/es
Publication of ITTO920658A1 publication Critical patent/ITTO920658A1/it
Priority to GR950300011T priority patent/GR950300011T1/el
Application granted granted Critical
Publication of IT1257065B publication Critical patent/IT1257065B/it
Priority to GR980400728T priority patent/GR3026673T3/el

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
    • G10L19/0204—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 subband decomposition
    • 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
    • G10L19/12—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
    • G10L2019/0001—Codebooks
    • G10L2019/0003—Backward prediction of gain

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Analogue/Digital Conversion (AREA)
  • Stereophonic System (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

IL SISTEMA DI CODIFICA DELLA VOCE A BASSO RITARDO, UTILIZZANTE TECNICHE DI ANALISI PER SINTESI, COMPRENDE MEZZI (AFC, AFD) PER ADATTARE A OGNI TRAMA I PARAMETRI SPETTRALI E L'ORDINE DI PREDIZIONE DEI FILTRI DI SINTESI (SYC, SYD) DEL CODIFICATORE (CDA, CDB) E DEL DECODIFICATORE (DA, DB), E DEI FILTRI DI PESATURA PERCETTIVA (FP) DEL CODIFICATORE, A PARTIRE DAL SEGNALE RICOSTRUITO RELATIVO ALLA TRAMA PRECEDENTE. NEL CASO DI UN CODIFICATORE CELP, SONO PREVISTI ANCHE MEZZI (AGC, AGD) PER ADATTARE, A PARTIRE DAL SEGNALE RICOSTRUITO, UN FATTORE, LEGATO ALLA POTENZA MEDIA DEL SEGNALE D'INGRESSO, DEL GUADAGNO CON CUI VENGONO PESATI I VETTORI DI INNOVAZIONE. (FIG. 2)
ITTO920658A 1992-07-31 1992-07-31 Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi. IT1257065B (it)

Priority Applications (11)

Application Number Priority Date Filing Date Title
ITTO920658A IT1257065B (it) 1992-07-31 1992-07-31 Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi.
US08/065,990 US5321793A (en) 1992-07-31 1993-05-21 Low-delay audio signal coder, using analysis-by-synthesis techniques
JP5167370A JPH0683395A (ja) 1992-07-31 1993-06-15 合成による分析技術を利用する低遅延オーディオ信号コーダ
DE0582921T DE582921T1 (de) 1992-07-31 1993-07-30 Kodierer von Tonsignalen mit niedriger Verzögerung, unter Verwendung von Analyse-durch-Synthese-Techniken.
AT93112293T ATE165183T1 (de) 1992-07-31 1993-07-30 Kodierer von audiosignalen mit niedriger verzögerung, unter verwendung von analyse-durch- synthese-techniken
EP93112293A EP0582921B1 (en) 1992-07-31 1993-07-30 Low-delay audio signal coder, using analysis-by-synthesis techniques
DE69317958T DE69317958T2 (de) 1992-07-31 1993-07-30 Kodierer von Audiosignalen mit niedriger Verzögerung, unter Verwendung von Analyse-durch-Synthese-Techniken
CA002101700A CA2101700C (en) 1992-07-31 1993-07-30 Low-delay audio signal coder, using analysis-by-synthesis techniques
ES93112293T ES2068172T3 (es) 1992-07-31 1993-07-30 Codificador de bajo retardo para señales de audio, que utiliza tecnicas de analisis por sintesis.
GR950300011T GR950300011T1 (en) 1992-07-31 1995-03-31 Low-delay audio signal coder, using analysis-by-synthesis techniques
GR980400728T GR3026673T3 (en) 1992-07-31 1998-04-16 Low-delay audio signal coder, using analysis-by-synthesis techniques.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITTO920658A IT1257065B (it) 1992-07-31 1992-07-31 Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi.

Publications (3)

Publication Number Publication Date
ITTO920658A0 ITTO920658A0 (it) 1992-07-31
ITTO920658A1 ITTO920658A1 (it) 1994-01-31
IT1257065B true IT1257065B (it) 1996-01-05

Family

ID=11410652

Family Applications (1)

Application Number Title Priority Date Filing Date
ITTO920658A IT1257065B (it) 1992-07-31 1992-07-31 Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi.

Country Status (9)

Country Link
US (1) US5321793A (it)
EP (1) EP0582921B1 (it)
JP (1) JPH0683395A (it)
AT (1) ATE165183T1 (it)
CA (1) CA2101700C (it)
DE (2) DE582921T1 (it)
ES (1) ES2068172T3 (it)
GR (2) GR950300011T1 (it)
IT (1) IT1257065B (it)

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AU675322B2 (en) * 1993-04-29 1997-01-30 Unisearch Limited Use of an auditory model to improve quality or lower the bit rate of speech synthesis systems
US5550543A (en) * 1994-10-14 1996-08-27 Lucent Technologies Inc. Frame erasure or packet loss compensation method
FR2734389B1 (fr) * 1995-05-17 1997-07-18 Proust Stephane Procede d'adaptation du niveau de masquage du bruit dans un codeur de parole a analyse par synthese utilisant un filtre de ponderation perceptuelle a court terme
JP3680380B2 (ja) * 1995-10-26 2005-08-10 ソニー株式会社 音声符号化方法及び装置
FR2742568B1 (fr) * 1995-12-15 1998-02-13 Catherine Quinquis Procede d'analyse par prediction lineaire d'un signal audiofrequence, et procedes de codage et de decodage d'un signal audiofrequence en comportant application
JP3092653B2 (ja) * 1996-06-21 2000-09-25 日本電気株式会社 広帯域音声符号化装置及び音声復号装置並びに音声符号化復号装置
US5751901A (en) * 1996-07-31 1998-05-12 Qualcomm Incorporated Method for searching an excitation codebook in a code excited linear prediction (CELP) coder
GB2318029B (en) * 1996-10-01 2000-11-08 Nokia Mobile Phones Ltd Audio coding method and apparatus
JP3266178B2 (ja) * 1996-12-18 2002-03-18 日本電気株式会社 音声符号化装置
EP0878790A1 (en) * 1997-05-15 1998-11-18 Hewlett-Packard Company Voice coding system and method
SE9903553D0 (sv) 1999-01-27 1999-10-01 Lars Liljeryd Enhancing percepptual performance of SBR and related coding methods by adaptive noise addition (ANA) and noise substitution limiting (NSL)
FI116992B (fi) * 1999-07-05 2006-04-28 Nokia Corp Menetelmät, järjestelmä ja laitteet audiosignaalin koodauksen ja siirron tehostamiseksi
US7260523B2 (en) * 1999-12-21 2007-08-21 Texas Instruments Incorporated Sub-band speech coding system
SE0001926D0 (sv) 2000-05-23 2000-05-23 Lars Liljeryd Improved spectral translation/folding in the subband domain
US7050545B2 (en) * 2001-04-12 2006-05-23 Tallabs Operations, Inc. Methods and apparatus for echo cancellation using an adaptive lattice based non-linear processor
US8605911B2 (en) 2001-07-10 2013-12-10 Dolby International Ab Efficient and scalable parametric stereo coding for low bitrate audio coding applications
SE0202159D0 (sv) 2001-07-10 2002-07-09 Coding Technologies Sweden Ab Efficientand scalable parametric stereo coding for low bitrate applications
WO2003046891A1 (en) 2001-11-29 2003-06-05 Coding Technologies Ab Methods for improving high frequency reconstruction
SE0202770D0 (sv) 2002-09-18 2002-09-18 Coding Technologies Sweden Ab Method for reduction of aliasing introduces by spectral envelope adjustment in real-valued filterbanks
US7619995B1 (en) * 2003-07-18 2009-11-17 Nortel Networks Limited Transcoders and mixers for voice-over-IP conferencing
ATE521143T1 (de) * 2005-02-23 2011-09-15 Ericsson Telefon Ab L M Adaptive bitzuweisung für die mehrkanal- audiokodierung
PL2118889T3 (pl) * 2007-03-05 2013-03-29 Ericsson Telefon Ab L M Sposób i sterownik do wygładzania stacjonarnego szumu tła
EP2212884B1 (en) * 2007-11-06 2013-01-02 Nokia Corporation An encoder
WO2009059632A1 (en) * 2007-11-06 2009-05-14 Nokia Corporation An encoder
CA2717584C (en) * 2008-03-04 2015-05-12 Lg Electronics Inc. Method and apparatus for processing an audio signal
CN102057424B (zh) * 2008-06-13 2015-06-17 诺基亚公司 用于经编码的音频数据的错误隐藏的方法和装置
CA2862715C (en) * 2009-10-20 2017-10-17 Ralf Geiger Multi-mode audio codec and celp coding adapted therefore
US20120029926A1 (en) 2010-07-30 2012-02-02 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for dependent-mode coding of audio signals
US9208792B2 (en) 2010-08-17 2015-12-08 Qualcomm Incorporated Systems, methods, apparatus, and computer-readable media for noise injection
US9626983B2 (en) 2014-06-26 2017-04-18 Qualcomm Incorporated Temporal gain adjustment based on high-band signal characteristic
ES2664348T3 (es) 2014-07-29 2018-04-19 Telefonaktiebolaget Lm Ericsson (Publ) Estimación de ruido de fondo en señales de audio

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JPS5921039U (ja) * 1982-07-30 1984-02-08 いすゞ自動車株式会社 内燃機関
JPS6097743A (ja) * 1983-11-02 1985-05-31 Canon Inc 適応型線形予測装置
CA2005115C (en) * 1989-01-17 1997-04-22 Juin-Hwey Chen Low-delay code-excited linear predictive coder for speech or audio
JPH02214899A (ja) * 1989-02-15 1990-08-27 Matsushita Electric Ind Co Ltd 音声符号化装置
IT1232084B (it) * 1989-05-03 1992-01-23 Cselt Centro Studi Lab Telecom Sistema di codifica per segnali audio a banda allargata
JP2939999B2 (ja) * 1989-05-24 1999-08-25 日本電気株式会社 可変長フレーム型ボコーダ
IT1241358B (it) * 1990-12-20 1994-01-10 Sip Sistema di codifica del segnale vocale con sottocodice annidato
US5233660A (en) * 1991-09-10 1993-08-03 At&T Bell Laboratories Method and apparatus for low-delay celp speech coding and decoding

Also Published As

Publication number Publication date
CA2101700C (en) 1997-02-25
EP0582921A3 (en) 1995-01-04
ES2068172T1 (es) 1995-04-16
CA2101700A1 (en) 1994-02-01
ES2068172T3 (es) 1998-06-01
GR3026673T3 (en) 1998-07-31
EP0582921B1 (en) 1998-04-15
ITTO920658A1 (it) 1994-01-31
US5321793A (en) 1994-06-14
ITTO920658A0 (it) 1992-07-31
ATE165183T1 (de) 1998-05-15
GR950300011T1 (en) 1995-03-31
JPH0683395A (ja) 1994-03-25
DE69317958D1 (de) 1998-05-20
DE69317958T2 (de) 1998-09-17
EP0582921A2 (en) 1994-02-16
DE582921T1 (de) 1995-06-08

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Legal Events

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0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970718