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

Efficient spectral envelope coding using dynamic scale factor 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
scale factor
frequency switching
dynamic scale
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 to SE9900256A priority Critical patent/SE9900256D0/en
Application filed by Lars Liljeryd filed Critical Lars Liljeryd
Priority to SE9903552A priority patent/SE9903552D0/en
Publication of SE9903552D0 publication Critical patent/SE9903552D0/en
Priority claimed from US09/763,128 external-priority patent/US6978236B1/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 scale factor grouping and time / frequency switching SE9903552D0 (en)

Priority Applications (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 audio quality of the audio encoder
SE9903552A SE9903552D0 (en) 1999-01-27 1999-10-01 Efficient spectral envelope coding using dynamic scale factor grouping and time / frequency switching

Applications Claiming Priority (21)

Application Number Priority Date Filing Date Title
SE9903552A SE9903552D0 (en) 1999-01-27 1999-10-01 Efficient spectral envelope coding using dynamic scale factor grouping 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
PCT/SE2000/000158 WO2000045378A2 (en) 1999-01-27 2000-01-26 Efficient spectral envelope coding using variable time/frequency resolution 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
AT00968271T AT271250T (en) 1999-10-01 2000-09-29 Encoding the envelope of the spectrum by means of variable time / frequency resolution
PT00968271T PT1216474E (en) 1999-10-01 2000-09-29 Efficient code of special envelope using resolution time / variable frequency
DE2000612198 DE60012198T2 (en) 1999-10-01 2000-09-29 Encoding the cord of the spectrum by variable time / frequency resolution
BRPI0014642A BRPI0014642B1 (en) 1999-10-01 2000-09-29 spectral envelope coding using variable time-frequency resolution and time-frequency shifting
ES00968271T ES2223591T3 (en) 1999-10-01 2000-09-29 Effective codification of special envelope using a resolution time / variable frequency.
DK00968271T DK1216474T3 (en) 1999-10-01 2000-09-29 Effective spectral envelope curve coding 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
CNB008136025A CN1172293C (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding method and its coding-decoding equipment
EP20000968271 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
JP2001528974A JP4035631B2 (en) 1999-10-01 2000-09-29 Efficient spectral envelope coding using variable time / frequency resolution and time / frequency switching
HK03101398A HK1049401A1 (en) 1999-10-01 2003-02-24 Effective spectral envelope coding method and coding/encoding apparatus thereof.
JP2005292384A JP4628921B2 (en) 1999-10-01 2005-10-05 Efficient spectral envelope coding using variable time / frequency resolution and time / frequency switching
JP2005292388A JP4334526B2 (en) 1999-10-01 2005-10-05 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
US11/246,284 US7191121B2 (en) 1999-10-01 2005-10-11 Efficient spectral envelope coding using variable time/frequency resolution and time/frequency switching

Publications (1)

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

Family

ID=26663488

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 scale factor 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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US7461002B2 (en) 2001-04-13 2008-12-02 Dolby Laboratories Licensing Corporation Method for time aligning audio signals using characterizations based on auditory events
US7711123B2 (en) 2001-04-13 2010-05-04 Dolby Laboratories Licensing Corporation Segmenting audio signals into auditory events
US7610205B2 (en) 2002-02-12 2009-10-27 Dolby Laboratories Licensing Corporation High quality time-scaling and pitch-scaling of audio signals
US7283954B2 (en) 2001-04-13 2007-10-16 Dolby Laboratories Licensing Corporation Comparing audio using characterizations based on auditory events
EP1386312B1 (en) * 2001-05-10 2008-02-20 Dolby Laboratories Licensing Corporation Improving transient performance of low bit rate audio coding systems by reducing pre-noise
US8605911B2 (en) 2001-07-10 2013-12-10 Dolby International Ab Efficient and scalable parametric stereo coding for low bitrate audio coding applications
SE0202159D0 (en) 2001-07-10 2002-07-09 Coding Technologies Sweden Ab Efficientand scalable parametric stereo coding for low bit rate applications
AU2002352182A1 (en) 2001-11-29 2003-06-10 Coding Technologies Ab Methods for improving high frequency reconstruction
DE60323331D1 (en) 2002-01-30 2008-10-16 Matsushita Electric Ind Co Ltd Method and device for audio encoding and decoding
SE0202770D0 (en) 2002-09-18 2002-09-18 Coding Technologies Sweden Ab Method for reduction of aliasing introduces by spectral envelope adjustment in real-valued filter bank
CA2992125C (en) 2004-03-01 2018-09-25 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
MX2007015118A (en) 2005-06-03 2008-02-14 Dolby Lab Licensing Corp Apparatus and method for encoding audio signals with decoding instructions.
US8417532B2 (en) 2006-10-18 2013-04-09 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
US8126721B2 (en) 2006-10-18 2012-02-28 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Encoding an information signal
BRPI0904958A2 (en) * 2008-07-11 2015-06-30 Fraunhofer Ges Forschung "apparatus and method for calculating bandwidth extension data using a spectral tilt controlled frame"
CA2899540C (en) * 2013-01-29 2018-12-11 Fraunhofer-Gesellschaft Zur Forderung 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 code decoding apparatus
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, the information decoding method and an 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 the data flow based on the 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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