DE69401517D1 - Teilbandkodierer mit differentiell kodierten skalenfaktoren - Google Patents

Teilbandkodierer mit differentiell kodierten skalenfaktoren

Info

Publication number
DE69401517D1
DE69401517D1 DE69401517T DE69401517T DE69401517D1 DE 69401517 D1 DE69401517 D1 DE 69401517D1 DE 69401517 T DE69401517 T DE 69401517T DE 69401517 T DE69401517 T DE 69401517T DE 69401517 D1 DE69401517 D1 DE 69401517D1
Authority
DE
Germany
Prior art keywords
input signal
coded representation
band encoder
differential coded
scale factors
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
DE69401517T
Other languages
English (en)
Other versions
DE69401517T2 (de
Inventor
Craig Todd
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dolby Laboratories Licensing Corp
Original Assignee
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 Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Application granted granted Critical
Publication of DE69401517D1 publication Critical patent/DE69401517D1/de
Publication of DE69401517T2 publication Critical patent/DE69401517T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G10L19/035—Scalar quantisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/66—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission
    • H04B1/667—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission for reducing bandwidth of signals; for improving efficiency of transmission using a division in frequency subbands

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Computational Linguistics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Dc Digital Transmission (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
DE69401517T 1993-08-31 1994-08-30 Teilbandkodierer mit differentiell kodierten skalenfaktoren Expired - Lifetime DE69401517T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/115,513 US5581653A (en) 1993-08-31 1993-08-31 Low bit-rate high-resolution spectral envelope coding for audio encoder and decoder
PCT/US1994/009736 WO1995006984A1 (en) 1993-08-31 1994-08-30 Sub-band coder with differentially encoded scale factors

Publications (2)

Publication Number Publication Date
DE69401517D1 true DE69401517D1 (de) 1997-02-27
DE69401517T2 DE69401517T2 (de) 1997-06-12

Family

ID=22361888

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69401517T Expired - Lifetime DE69401517T2 (de) 1993-08-31 1994-08-30 Teilbandkodierer mit differentiell kodierten skalenfaktoren

Country Status (11)

Country Link
US (1) US5581653A (de)
EP (1) EP0716787B1 (de)
JP (1) JP3940165B2 (de)
AT (1) ATE147910T1 (de)
AU (1) AU685505B2 (de)
CA (1) CA2167527C (de)
DE (1) DE69401517T2 (de)
DK (1) DK0716787T3 (de)
ES (1) ES2097061T3 (de)
SG (1) SG48278A1 (de)
WO (1) WO1995006984A1 (de)

Families Citing this family (94)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1111959C (zh) * 1993-11-09 2003-06-18 索尼公司 量化装置、量化方法、高效率编码装置、高效率编码方法、解码装置和高效率解码装置
ES2224121T3 (es) * 1994-04-01 2005-03-01 Sony Corporation Metodo y dispositivo para codificar y descodificar informacion.
WO1995032499A1 (fr) * 1994-05-25 1995-11-30 Sony Corporation Procede de codage, procede de decodage, procede de codage-decodage, codeur, decodeur et codeur-decodeur
US6700958B2 (en) 1995-04-10 2004-03-02 Starguide Digital Networks, Inc. Method and apparatus for transmitting coded audio signals through a transmission channel with limited bandwidth
US6301555B2 (en) * 1995-04-10 2001-10-09 Corporate Computer Systems Adjustable psycho-acoustic parameters
US6263307B1 (en) 1995-04-19 2001-07-17 Texas Instruments Incorporated Adaptive weiner filtering using line spectral frequencies
JP2976860B2 (ja) * 1995-09-13 1999-11-10 松下電器産業株式会社 再生装置
DE19628292B4 (de) 1996-07-12 2007-08-02 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren zum Codieren und Decodieren von Stereoaudiospektralwerten
US5890125A (en) * 1997-07-16 1999-03-30 Dolby Laboratories Licensing Corporation Method and apparatus for encoding and decoding multiple audio channels at low bit rates using adaptive selection of encoding method
US6091773A (en) * 1997-11-12 2000-07-18 Sydorenko; Mark R. Data compression method and apparatus
DE69808146T2 (de) * 1998-01-12 2003-05-15 Stmicroelectronics Asia Pacific Pte Ltd., Singapur/Singapore Verfahren und gerät zur spektralumformung in einem transformationskodierer für hochwertige tonsignale
US7194757B1 (en) 1998-03-06 2007-03-20 Starguide Digital Network, Inc. Method and apparatus for push and pull distribution of multimedia
US6160797A (en) 1998-04-03 2000-12-12 Starguide Digital Networks, Inc. Satellite receiver/router, system, and method of use
US8284774B2 (en) 1998-04-03 2012-10-09 Megawave Audio Llc Ethernet digital storage (EDS) card and satellite transmission system
WO1999053479A1 (en) * 1998-04-15 1999-10-21 Sgs-Thomson Microelectronics Asia Pacific (Pte) Ltd. Fast frame optimisation in an audio encoder
DE19840835C2 (de) * 1998-09-07 2003-01-09 Fraunhofer Ges Forschung Vorrichtung und Verfahren zum Entropiecodieren von Informationswörtern und Vorrichtung und Verfahren zum Decodieren von Entropie-codierten Informationswörtern
JP3352406B2 (ja) 1998-09-17 2002-12-03 松下電器産業株式会社 オーディオ信号の符号化及び復号方法及び装置
US6199041B1 (en) * 1998-11-20 2001-03-06 International Business Machines Corporation System and method for sampling rate transformation in speech recognition
CA2323014C (en) * 1999-01-07 2008-07-22 Koninklijke Philips Electronics N.V. Efficient coding of side information in a lossless encoder
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)
SE9903552D0 (sv) * 1999-01-27 1999-10-01 Lars Liljeryd Efficient spectral envelope coding using dynamic scalefactor grouping and time/frequency switching
KR100297832B1 (ko) * 1999-05-15 2001-09-26 윤종용 음성 신호 위상 정보 처리 장치 및 그 방법
US6324505B1 (en) * 1999-07-19 2001-11-27 Qualcomm Incorporated Amplitude quantization scheme for low-bit-rate speech coders
JP4287545B2 (ja) * 1999-07-26 2009-07-01 パナソニック株式会社 サブバンド符号化方式
JP4242516B2 (ja) * 1999-07-26 2009-03-25 パナソニック株式会社 サブバンド符号化方式
JP2001094433A (ja) * 1999-09-17 2001-04-06 Matsushita Electric Ind Co Ltd サブバンド符号化・復号方法
US6978236B1 (en) * 1999-10-01 2005-12-20 Coding Technologies Ab Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
US6775587B1 (en) 1999-10-30 2004-08-10 Stmicroelectronics Asia Pacific Pte Ltd. Method of encoding frequency coefficients in an AC-3 encoder
SE0001926D0 (sv) 2000-05-23 2000-05-23 Lars Liljeryd Improved spectral translation/folding in the subband domain
US6647365B1 (en) * 2000-06-02 2003-11-11 Lucent Technologies Inc. Method and apparatus for detecting noise-like signal components
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
EP1423847B1 (de) 2001-11-29 2005-02-02 Coding Technologies AB Wiederherstellung von hochfrequenzkomponenten
US7240001B2 (en) * 2001-12-14 2007-07-03 Microsoft Corporation Quality improvement techniques in an audio encoder
JP3765413B2 (ja) * 2002-07-12 2006-04-12 ソニー株式会社 情報符号化装置および方法、情報復号装置および方法、記録媒体、並びにプログラム
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
US8204079B2 (en) * 2002-10-28 2012-06-19 Qualcomm Incorporated Joint transmission of multiple multimedia streams
US20040083495A1 (en) * 2002-10-29 2004-04-29 Lane Richard D. Mulitmedia transmission using variable gain amplification based on data importance
US7272566B2 (en) * 2003-01-02 2007-09-18 Dolby Laboratories Licensing Corporation Reducing scale factor transmission cost for MPEG-2 advanced audio coding (AAC) using a lattice based post processing technique
US7460990B2 (en) * 2004-01-23 2008-12-02 Microsoft Corporation Efficient coding of digital media spectral data using wide-sense perceptual similarity
DE102004007191B3 (de) * 2004-02-13 2005-09-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audiocodierung
DE102004007200B3 (de) * 2004-02-13 2005-08-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audiocodierung
DE102004007184B3 (de) * 2004-02-13 2005-09-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Verfahren und Vorrichtung zum Quantisieren eines Informationssignals
DE102004039345A1 (de) * 2004-08-12 2006-02-23 Micronas Gmbh Verfahren und Vorrichtung zur Rauschunterdrückung in einer Datenverarbeitungseinrichtung
US8270439B2 (en) * 2005-07-08 2012-09-18 Activevideo Networks, Inc. Video game system using pre-encoded digital audio mixing
US7562021B2 (en) * 2005-07-15 2009-07-14 Microsoft Corporation Modification of codewords in dictionary used for efficient coding of digital media spectral data
US7630882B2 (en) * 2005-07-15 2009-12-08 Microsoft Corporation Frequency segmentation to obtain bands for efficient coding of digital media
US8074248B2 (en) 2005-07-26 2011-12-06 Activevideo Networks, Inc. System and method for providing video content associated with a source image to a television in a communication network
US20070094035A1 (en) * 2005-10-21 2007-04-26 Nokia Corporation Audio coding
US7953604B2 (en) * 2006-01-20 2011-05-31 Microsoft Corporation Shape and scale parameters for extended-band frequency coding
US7831434B2 (en) 2006-01-20 2010-11-09 Microsoft Corporation Complex-transform channel coding with extended-band frequency coding
US8190425B2 (en) 2006-01-20 2012-05-29 Microsoft Corporation Complex cross-correlation parameters for multi-channel audio
US7590523B2 (en) * 2006-03-20 2009-09-15 Mindspeed Technologies, Inc. Speech post-processing using MDCT coefficients
EP3145200A1 (de) 2007-01-12 2017-03-22 ActiveVideo Networks, Inc. Mpeg-objekte und systeme und verfahren zur verwendung von mpeg-objekten
US9826197B2 (en) 2007-01-12 2017-11-21 Activevideo Networks, Inc. Providing television broadcasts over a managed network and interactive content over an unmanaged network to a client device
KR20080072224A (ko) * 2007-02-01 2008-08-06 삼성전자주식회사 오디오 부호화 및 복호화 장치와 그 방법
US20100280830A1 (en) * 2007-03-16 2010-11-04 Nokia Corporation Decoder
US7761290B2 (en) 2007-06-15 2010-07-20 Microsoft Corporation Flexible frequency and time partitioning in perceptual transform coding of audio
US8046214B2 (en) * 2007-06-22 2011-10-25 Microsoft Corporation Low complexity decoder for complex transform coding of multi-channel sound
US7885819B2 (en) 2007-06-29 2011-02-08 Microsoft Corporation Bitstream syntax for multi-process audio decoding
KR101403340B1 (ko) * 2007-08-02 2014-06-09 삼성전자주식회사 변환 부호화 방법 및 장치
US8249883B2 (en) 2007-10-26 2012-08-21 Microsoft Corporation Channel extension coding for multi-channel source
KR20090110244A (ko) * 2008-04-17 2009-10-21 삼성전자주식회사 오디오 시맨틱 정보를 이용한 오디오 신호의 부호화/복호화 방법 및 그 장치
KR101599875B1 (ko) * 2008-04-17 2016-03-14 삼성전자주식회사 멀티미디어의 컨텐트 특성에 기반한 멀티미디어 부호화 방법 및 장치, 멀티미디어의 컨텐트 특성에 기반한 멀티미디어 복호화 방법 및 장치
KR20090110242A (ko) * 2008-04-17 2009-10-21 삼성전자주식회사 오디오 신호를 처리하는 방법 및 장치
US8290782B2 (en) * 2008-07-24 2012-10-16 Dts, Inc. Compression of audio scale-factors by two-dimensional transformation
JP2010079275A (ja) * 2008-08-29 2010-04-08 Sony Corp 周波数帯域拡大装置及び方法、符号化装置及び方法、復号化装置及び方法、並びにプログラム
TWI556227B (zh) 2009-05-27 2016-11-01 杜比國際公司 從訊號的低頻成份產生該訊號之高頻成份的系統與方法，及其機上盒、電腦程式產品、軟體程式及儲存媒體
US11657788B2 (en) 2009-05-27 2023-05-23 Dolby International Ab Efficient combined harmonic transposition
US8700410B2 (en) * 2009-06-18 2014-04-15 Texas Instruments Incorporated Method and system for lossless value-location encoding
US8194862B2 (en) * 2009-07-31 2012-06-05 Activevideo Networks, Inc. Video game system with mixing of independent pre-encoded digital audio bitstreams
CA2814070A1 (en) 2010-10-14 2012-04-19 Activevideo Networks, Inc. Streaming digital video between video devices using a cable television system
US9204203B2 (en) 2011-04-07 2015-12-01 Activevideo Networks, Inc. Reduction of latency in video distribution networks using adaptive bit rates
US9536534B2 (en) * 2011-04-20 2017-01-03 Panasonic Intellectual Property Corporation Of America Speech/audio encoding apparatus, speech/audio decoding apparatus, and methods thereof
JP5942358B2 (ja) * 2011-08-24 2016-06-29 ソニー株式会社 符号化装置および方法、復号装置および方法、並びにプログラム
WO2013106390A1 (en) 2012-01-09 2013-07-18 Activevideo Networks, Inc. Rendering of an interactive lean-backward user interface on a television
US8527264B2 (en) * 2012-01-09 2013-09-03 Dolby Laboratories Licensing Corporation Method and system for encoding audio data with adaptive low frequency compensation
US9800945B2 (en) 2012-04-03 2017-10-24 Activevideo Networks, Inc. Class-based intelligent multiplexing over unmanaged networks
US9123084B2 (en) 2012-04-12 2015-09-01 Activevideo Networks, Inc. Graphical application integration with MPEG objects
MX346945B (es) 2013-01-29 2017-04-06 Fraunhofer Ges Forschung Aparato y metodo para generar una señal de refuerzo de frecuencia mediante una operacion de limitacion de energia.
US10275128B2 (en) 2013-03-15 2019-04-30 Activevideo Networks, Inc. Multiple-mode system and method for providing user selectable video content
EP3005712A1 (de) 2013-06-06 2016-04-13 ActiveVideo Networks, Inc. Überlagerte darstellung einer benutzerschnittstelle auf quellvideoinhalten
US9219922B2 (en) 2013-06-06 2015-12-22 Activevideo Networks, Inc. System and method for exploiting scene graph information in construction of an encoded video sequence
US9294785B2 (en) 2013-06-06 2016-03-22 Activevideo Networks, Inc. System and method for exploiting scene graph information in construction of an encoded video sequence
US9788029B2 (en) 2014-04-25 2017-10-10 Activevideo Networks, Inc. Intelligent multiplexing using class-based, multi-dimensioned decision logic for managed networks
EP3483879A1 (de) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Analyse-/synthese-fensterfunktion für modulierte geläppte transformation
EP3483883A1 (de) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audiokodierung und -dekodierung mit selektiver nachfilterung
EP3483884A1 (de) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Signalfiltrierung
EP3483882A1 (de) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Steuerung der bandbreite in codierern und/oder decodierern
EP3483886A1 (de) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Auswahl einer grundfrequenz
WO2019091576A1 (en) 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoders, audio decoders, methods and computer programs adapting an encoding and decoding of least significant bits
WO2019091573A1 (en) * 2017-11-10 2019-05-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for encoding and decoding an audio signal using downsampling or interpolation of scale parameters
EP3483880A1 (de) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Zeitliche rauschformung
EP3483878A1 (de) 2017-11-10 2019-05-15 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audiodecoder mit auswahlfunktion für unterschiedliche verlustmaskierungswerkzeuge

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2389277A1 (fr) * 1977-04-29 1978-11-24 Ibm France Procede de quantification a allocation dynamique du taux de bits disponible, et dispositif de mise en oeuvre dudit procede
EP0064119B1 (de) * 1981-04-30 1985-08-28 International Business Machines Corporation Sprachkodierungsverfahren und Einrichtung zur Durchführung des Verfahrens
US4550425A (en) * 1982-09-20 1985-10-29 Sperry Corporation Speech sampling and companding device
DE3506912A1 (de) * 1985-02-27 1986-08-28 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Verfahren zur uebertragung eines audiosignals
DE3639753A1 (de) * 1986-11-21 1988-06-01 Inst Rundfunktechnik Gmbh Verfahren zum uebertragen digitalisierter tonsignale
US4805193A (en) * 1987-06-04 1989-02-14 Motorola, Inc. Protection of energy information in sub-band coding
US5109417A (en) * 1989-01-27 1992-04-28 Dolby Laboratories Licensing Corporation Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio
DE4102324C1 (de) * 1991-01-26 1992-06-17 Institut Fuer Rundfunktechnik Gmbh, 8000 Muenchen, De

Also Published As

Publication number Publication date
DE69401517T2 (de) 1997-06-12
SG48278A1 (en) 1998-04-17
CA2167527A1 (en) 1995-03-09
DK0716787T3 (da) 1997-06-23
ATE147910T1 (de) 1997-02-15
EP0716787A1 (de) 1996-06-19
WO1995006984A1 (en) 1995-03-09
AU7676594A (en) 1995-03-22
EP0716787B1 (de) 1997-01-15
AU685505B2 (en) 1998-01-22
US5581653A (en) 1996-12-03
CA2167527C (en) 2004-05-18
JP3940165B2 (ja) 2007-07-04
JPH09502314A (ja) 1997-03-04
ES2097061T3 (es) 1997-03-16

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