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 switchingInfo
- 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
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.
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
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 scalefactor grouping and time / frequency switching |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU2585600A (en) |
SE (1) | SE9903552D0 (en) |
WO (1) | WO2000045378A2 (en) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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)
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 |
-
1999
- 1999-10-01 SE SE9903552A patent/SE9903552D0/en unknown
-
2000
- 2000-01-26 WO PCT/SE2000/000158 patent/WO2000045378A2/en active Application Filing
- 2000-01-26 AU AU25856/00A patent/AU2585600A/en not_active Abandoned
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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