SE9903552D0 - Efficient spectral envelope coding using dynamic scalefactor grouping and time / frequency switching - Google Patents

Efficient spectral envelope coding using dynamic scalefactor grouping and time / frequency switching

Info

Publication number
SE9903552D0
SE9903552D0 SE9903552A SE9903552A SE9903552D0 SE 9903552 D0 SE9903552 D0 SE 9903552D0 SE 9903552 A SE9903552 A SE 9903552A SE 9903552 A SE9903552 A SE 9903552A SE 9903552 D0 SE9903552 D0 SE 9903552D0
Authority
SE
Sweden
Prior art keywords
time
spectral envelope
scalefactor
grouping
dynamic
Prior art date
Application number
SE9903552A
Other languages
Swedish (sv)
Inventor
Lars Liljeryd
Fredrik Henn
Kristofer Kjoerling
Per Ekstrand
Original Assignee
Lars Liljeryd
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
Priority claimed from SE9900256A external-priority patent/SE9900256D0/en
Application filed by Lars Liljeryd filed Critical Lars Liljeryd
Priority to SE9903552A priority Critical patent/SE9903552D0/en
Publication of SE9903552D0 publication Critical patent/SE9903552D0/en
Priority to AU25856/00A priority patent/AU2585600A/en
Priority to PCT/SE2000/000158 priority patent/WO2000045378A2/en
Priority to US09/763,128 priority patent/US6978236B1/en
Priority to AT00968271T priority patent/ATE271250T1/en
Priority to JP2001528974A priority patent/JP4035631B2/en
Priority to EP00968271A priority patent/EP1216474B1/en
Priority to AU78212/00A priority patent/AU7821200A/en
Priority to DK00968271T priority patent/DK1216474T3/en
Priority to PT00968271T priority patent/PT1216474E/en
Priority to RU2002111665/09A priority patent/RU2236046C2/en
Priority to PCT/SE2000/001887 priority patent/WO2001026095A1/en
Priority to BRPI0014642A priority patent/BRPI0014642B1/en
Priority to CNB008136025A priority patent/CN1172293C/en
Priority to ES00968271T priority patent/ES2223591T3/en
Priority to DE60012198T priority patent/DE60012198T2/en
Priority to HK03101398.3A priority patent/HK1049401B/en
Priority to JP2005292384A priority patent/JP4628921B2/en
Priority to JP2005292388A priority patent/JP4334526B2/en
Priority to US11/246,284 priority patent/US7191121B2/en
Priority to US11/246,283 priority patent/US7181389B2/en

Links

Abstract

The present invention provides a new method and an apparatus for spectral envelope encoding. The invention teaches how to perform and signal compactly a time/frequency mapping of the envelope representation, and further, encode the spectral envelope data efficiently using adaptive time/frequency directional coding. The method is applicable to both natural audio coding and speech coding systems and is especially suited for coders using SBR [WO 98/57436] and other high frequency reconstruction methods.
SE9903552A 1999-01-27 1999-10-01 Efficient spectral envelope coding using dynamic scalefactor grouping and time / frequency switching SE9903552D0 (en)

Priority Applications (21)

Application Number Priority Date Filing Date Title
SE9903552A SE9903552D0 (en) 1999-01-27 1999-10-01 Efficient spectral envelope coding using dynamic scalefactor grouping and time / frequency switching
AU25856/00A AU2585600A (en) 1999-01-27 2000-01-26 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
PCT/SE2000/000158 WO2000045378A2 (en) 1999-01-27 2000-01-26 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
US09/763,128 US6978236B1 (en) 1999-10-01 2000-01-26 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
ES00968271T ES2223591T3 (en) 1999-10-01 2000-09-29 EFFECTIVE CODIFICATION OF SPECIAL ENVELOPE USING A RESOLUTION TIME / VARIABLE FREQUENCY.
DE60012198T DE60012198T2 (en) 1999-10-01 2000-09-29 ENCODING THE CORD OF THE SPECTRUM BY VARIABLE TIME / FREQUENCY RESOLUTION
PT00968271T PT1216474E (en) 1999-10-01 2000-09-29 EFFICIENT CODE OF SPECIAL ENVELOPE USING RESOLUTION TIME / VARIABLE FREQUENCY
CNB008136025A CN1172293C (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
EP00968271A EP1216474B1 (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding using variable time/frequency resolution
AU78212/00A AU7821200A (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
DK00968271T DK1216474T3 (en) 1999-10-01 2000-09-29 Effective spectral envelope curve coding using variable time / frequency resolution
AT00968271T ATE271250T1 (en) 1999-10-01 2000-09-29 CODING THE ENVELOPE OF THE SPECTRUM USING VARIABLE TIME/FREQUENCY RESOLUTION
RU2002111665/09A RU2236046C2 (en) 1999-10-01 2000-09-29 Effective encoding of spectrum envelope with use of variable resolution in time and frequency and switching time/frequency
PCT/SE2000/001887 WO2001026095A1 (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
BRPI0014642A BRPI0014642B1 (en) 1999-10-01 2000-09-29 spectral envelope coding using variable time-frequency resolution and time-frequency shifting
JP2001528974A JP4035631B2 (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding using variable time / frequency resolution and time / frequency switching
HK03101398.3A HK1049401B (en) 1999-10-01 2003-02-24 Effective spectral envelope coding method and coding/encoding apparatus thereof
JP2005292388A JP4334526B2 (en) 1999-10-01 2005-10-05 Efficient spectral envelope coding using variable time / frequency resolution and time / frequency switching
JP2005292384A JP4628921B2 (en) 1999-10-01 2005-10-05 Efficient spectral envelope coding using variable time / frequency resolution and time / frequency switching
US11/246,284 US7191121B2 (en) 1999-10-01 2005-10-11 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching
US11/246,283 US7181389B2 (en) 1999-10-01 2005-10-11 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9900256A SE9900256D0 (en) 1999-01-27 1999-01-27 Method and apparatus for improving the efficiency and sound quality of audio encoders
SE9903552A SE9903552D0 (en) 1999-01-27 1999-10-01 Efficient spectral envelope coding using dynamic scalefactor grouping and time / frequency switching

Publications (1)

Publication Number Publication Date
SE9903552D0 true SE9903552D0 (en) 1999-10-01

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
SE9903552A SE9903552D0 (en) 1999-01-27 1999-10-01 Efficient spectral envelope coding using dynamic scalefactor grouping and time / frequency switching

Country Status (3)

Country Link
AU (1) AU2585600A (en)
SE (1) SE9903552D0 (en)
WO (1) WO2000045378A2 (en)

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US7711123B2 (en) 2001-04-13 2010-05-04 Dolby Laboratories Licensing Corporation Segmenting audio signals into auditory events
US7461002B2 (en) 2001-04-13 2008-12-02 Dolby Laboratories Licensing Corporation Method for time aligning audio signals using characterizations based on auditory events
US7283954B2 (en) 2001-04-13 2007-10-16 Dolby Laboratories Licensing Corporation Comparing audio using characterizations based on auditory events
US7610205B2 (en) 2002-02-12 2009-10-27 Dolby Laboratories Licensing Corporation High quality time-scaling and pitch-scaling of audio signals
WO2002093560A1 (en) * 2001-05-10 2002-11-21 Dolby Laboratories Licensing Corporation Improving transient performance of low bit rate audio coding systems by reducing pre-noise
SE0202159D0 (en) 2001-07-10 2002-07-09 Coding Technologies Sweden Ab Efficientand scalable parametric stereo coding for low bitrate applications
US8605911B2 (en) 2001-07-10 2013-12-10 Dolby International Ab Efficient and scalable parametric stereo coding for low bitrate audio coding applications
JP3870193B2 (en) 2001-11-29 2007-01-17 コーディング テクノロジーズ アクチボラゲット Encoder, decoder, method and computer program used for high frequency reconstruction
EP1470550B1 (en) 2002-01-30 2008-09-03 Matsushita Electric Industrial Co., Ltd. Audio encoding and decoding device and methods thereof
SE0202770D0 (en) 2002-09-18 2002-09-18 Coding Technologies Sweden Ab Method of reduction of aliasing is introduced by spectral envelope adjustment in real-valued filterbanks
CA2992089C (en) 2004-03-01 2018-08-21 Dolby Laboratories Licensing Corporation Reconstructing audio signals with multiple decorrelation techniques and differentially coded parameters
US7508947B2 (en) 2004-08-03 2009-03-24 Dolby Laboratories Licensing Corporation Method for combining audio signals using auditory scene analysis
US7991610B2 (en) 2005-04-13 2011-08-02 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Adaptive grouping of parameters for enhanced coding efficiency
AU2006255662B2 (en) 2005-06-03 2012-08-23 Dolby Laboratories Licensing Corporation Apparatus and method for encoding audio signals with decoding instructions
US8126721B2 (en) 2006-10-18 2012-02-28 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Encoding an information signal
US8041578B2 (en) 2006-10-18 2011-10-18 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Encoding an information signal
US8417532B2 (en) 2006-10-18 2013-04-09 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Encoding an information signal
ES2372014T3 (en) * 2008-07-11 2012-01-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. APPARATUS AND METHOD FOR CALCULATING BANDWIDTH EXTENSION DATA USING A FRAME CONTROLLED BY SPECTRAL SLOPE.
EP3279894B1 (en) * 2013-01-29 2020-04-01 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Audio encoders, audio decoders, systems, methods and computer programs using an increased temporal resolution in temporal proximity of onsets or offsets of fricatives or affricates
TWI557726B (en) * 2013-08-29 2016-11-11 杜比國際公司 System and method for determining a master scale factor band table for a highband signal of an audio signal

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3144009B2 (en) * 1991-12-24 2001-03-07 日本電気株式会社 Speech codec
US5581653A (en) * 1993-08-31 1996-12-03 Dolby Laboratories Licensing Corporation Low bit-rate high-resolution spectral envelope coding for audio encoder and decoder
JP3277692B2 (en) * 1994-06-13 2002-04-22 ソニー株式会社 Information encoding method, information decoding method, and information recording medium
US5852806A (en) * 1996-03-19 1998-12-22 Lucent Technologies Inc. Switched filterbank for use in audio signal coding
SE512719C2 (en) * 1997-06-10 2000-05-02 Lars Gustaf Liljeryd A method and apparatus for reducing data flow based on harmonic bandwidth expansion

Also Published As

Publication number Publication date
WO2000045378A2 (en) 2000-08-03
WO2000045378A3 (en) 2000-11-16
AU2585600A (en) 2000-08-18

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