NO20075773L - Audiocodes etterfilter - Google Patents
Audiocodes etterfilterInfo
- Publication number
- NO20075773L NO20075773L NO20075773A NO20075773A NO20075773L NO 20075773 L NO20075773 L NO 20075773L NO 20075773 A NO20075773 A NO 20075773A NO 20075773 A NO20075773 A NO 20075773A NO 20075773 L NO20075773 L NO 20075773L
- Authority
- NO
- Norway
- Prior art keywords
- reconstructed audio
- filter
- filter coefficients
- another example
- reconstructed
- Prior art date
Links
- 230000005236 sound signal Effects 0.000 abstract 3
- 239000002131 composite material Substances 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
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
- G10L19/04—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
-
- 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
- G10L19/26—Pre-filtering or post-filtering
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Signal Processing (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Computational Linguistics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
- Stereophonic System (AREA)
Abstract
Det beskrives teknikker og verktøy for prosessering av rekonstruerte audiosignaler. For eksempel filtreres et rekonstruert audiosignal i tidsdomenen ved bruk av filterkoeffisienter som beregnes, i det minste delvis, i frekvensdomenen. Som et annet eksempel, produsering av et sett av filterkoeffisienter for filtrering av et rekonstruert audiosignal inkluderer klipping av en eller flere topper av et sett av koeffisientverdier. Som enda et annet eksempel, for en subbåndkodek, i et frekvensområde nær en skjæring mellom to subbånd, forbedres et rekonstruert komposittsignal.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/142,603 US7707034B2 (en) | 2005-05-31 | 2005-05-31 | Audio codec post-filter |
PCT/US2006/012641 WO2006130226A2 (en) | 2005-05-31 | 2006-04-05 | Audio codec post-filter |
Publications (2)
Publication Number | Publication Date |
---|---|
NO20075773L true NO20075773L (no) | 2008-02-28 |
NO340411B1 NO340411B1 (no) | 2017-04-18 |
Family
ID=37464575
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO20075773A NO340411B1 (no) | 2005-05-31 | 2007-11-12 | Audiokoding etterfilter |
Country Status (15)
Country | Link |
---|---|
US (1) | US7707034B2 (no) |
EP (1) | EP1899962B1 (no) |
JP (2) | JP5165559B2 (no) |
KR (2) | KR101246991B1 (no) |
CN (1) | CN101501763B (no) |
AU (1) | AU2006252962B2 (no) |
CA (1) | CA2609539C (no) |
EG (1) | EG26313A (no) |
ES (1) | ES2644730T3 (no) |
IL (1) | IL187167A0 (no) |
MX (1) | MX2007014555A (no) |
NO (1) | NO340411B1 (no) |
NZ (1) | NZ563461A (no) |
WO (1) | WO2006130226A2 (no) |
ZA (1) | ZA200710201B (no) |
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ES2644730T3 (es) | 2017-11-30 |
MX2007014555A (es) | 2008-11-06 |
IL187167A0 (en) | 2008-06-05 |
JP2012163981A (ja) | 2012-08-30 |
KR101344174B1 (ko) | 2013-12-20 |
EP1899962B1 (en) | 2017-07-26 |
JP2009508146A (ja) | 2009-02-26 |
NO340411B1 (no) | 2017-04-18 |
WO2006130226A3 (en) | 2009-04-23 |
ZA200710201B (en) | 2009-08-26 |
WO2006130226A2 (en) | 2006-12-07 |
KR101246991B1 (ko) | 2013-03-25 |
KR20120121928A (ko) | 2012-11-06 |
EP1899962A2 (en) | 2008-03-19 |
CA2609539A1 (en) | 2006-12-07 |
EG26313A (en) | 2013-07-24 |
CN101501763A (zh) | 2009-08-05 |
US7707034B2 (en) | 2010-04-27 |
AU2006252962A1 (en) | 2006-12-07 |
CN101501763B (zh) | 2012-09-19 |
EP1899962A4 (en) | 2014-09-10 |
KR20080011216A (ko) | 2008-01-31 |
US20060271354A1 (en) | 2006-11-30 |
NZ563461A (en) | 2011-01-28 |
JP5165559B2 (ja) | 2013-03-21 |
CA2609539C (en) | 2016-03-29 |
JP5688852B2 (ja) | 2015-03-25 |
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