DK2186089T3 - Fremgangsmåde og indretning til perceptuel spektral afkodning af et audiosignal inklusive udfyldning af spektrale huller - Google Patents
Fremgangsmåde og indretning til perceptuel spektral afkodning af et audiosignal inklusive udfyldning af spektrale huller Download PDFInfo
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- DK2186089T3 DK2186089T3 DK08828426.0T DK08828426T DK2186089T3 DK 2186089 T3 DK2186089 T3 DK 2186089T3 DK 08828426 T DK08828426 T DK 08828426T DK 2186089 T3 DK2186089 T3 DK 2186089T3
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Classifications
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- 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
- G10L19/028—Noise substitution, i.e. substituting non-tonal spectral components by noisy source
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- 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
- G10L21/00—Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
- G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
- G10L21/0316—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
- G10L21/0364—Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude for improving intelligibility
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- 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
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- Audiology, Speech & Language Pathology (AREA)
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Claims (10)
1. Fremgangsmåde til perceptuel spektral afkodning af et audiosignal, omfattende trinnene: afkodning (210) af spektrale koefficienter retableret fra en binær strøm til afkodede spektrale koefficienter af et initialt sæt af spektrale koefficienter; spektrumudfyldning (212) af det initiale sæt af spektrale koefficienter til et sæt af rekonstruerede spektrale koefficienter; hvilken spektrumudfyldning (212) omfatter støjudfyldning (214) af spektrale huller ved at sætte spektrale koefficienter i det initiale sæt af spektrale koefficienter, der ikke modtages i den binære strøm, lig med elementer udledt fra de afkodede spektrale koefficienter; og konvertering (216) af sættet af spektrale koefficienter af et frekvensdomæne til et audiosignal af et tidsdomæne, kendetegnet ved, at støjudfyldningen (214) på sin side omfatter oprettelse (262) afen spektral ko-debog ved konkatenering af de perceptuelt relevante spektrale koefficienter af de afkodede koefficienter, hvor støjudfyldningen (214) af spektrale huller omfatter at sætte spektrale koefficienter i det initiale sæt af spektrale koefficienter lig med elementer udvalgt (266) fra den spektrale kodebog i henhold til mindst et kriterium; hvor et af det mindst ene kriterium er udvælgelse (266) af elementer fra den spektrale kodebog i indeksrækkefølge, startende fra lavfrekensenden, hvor i-indekser tildeles til de spektrale koefficienter, og j-indekser tildeles til elementerne af den spektrale kodebog, hvor de spektrale huller udfyldes blindt ved at øge indeks j lige så meget som indeks i og gennem en cyklisk anvendelse af den spektrale kodebog, hvis der er flere spektrale huller end elementer i den spektrale kodebog.
2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at den spektrale kodebog (51) omfatter elementer baseret på perceptuelt relevante afkodede spektrale koefficienter fra en aktuel ramme.
3. Fremgangsmåde ifølge krav 1 eller 2, kendetegnet ved, at den spektrale kodebog omfatter elementer baseret på perceptuelt relevante afkodede spektrale koefficienter fra mindst en blandt en tidligere ramme og en fremtidig ramme.
4. Fremgangsmåde ifølge et hvilket som helst af kravene 1 til 3, kendetegnet ved, at støjudfyldningen (214) endvidere omfatter efterbehandling (264) af den spektrale kodebog til udjævning af visse afhængigheder i frekvensrum og/eller tidsmæssigt rum, hvor elementerne udvælges (266) fra den efterbehandlede spektrale kodebog.
5. Fremgangsmåde ifølge et hvilket som helst af kravene 1 til 4, kendetegnet ved, at konverteringen (216) omfatter invers transformering under anvendelse af mindst en blandt en invers transformation og en invers filterbank.
6. Perceptuel spektral afkoder (40), omfattende: en indgang for en binær strøm (25); en afkoder til spektrale koefficienter (41), der er indrettet til afkodning af spektrale koefficienter retableret fra en binær strøm (25) til afkodede spektrale koefficienter af et initialt sæt af spektrale koefficienter (42); en spektrumudfylder (43), der er forbundet med afkoderen til spektrale koefficienter (41) og indrettet til spektrumudfyldning af det initiale sæt af spektrale koefficienter (42) til et sæt af rekonstruerede spektrale koefficienter; hvilken spektrumudfylder (43) omfatter en støjudfylder (50) til støjudfyldning af spektrale huller ved at sætte spektrale koefficienter i det initiale sæt af spektrale koefficienter (42), der ikke afkodes fra den binære strøm (25), lig med elementer udledt fra de afkodede spektrale koefficienter; og en konverter (45), der er forbundet med spektrumudfylderen (43) og indrettet til at konvertere sættet af rekonstruerede spektrale koefficienter af et frekvensdomæne til et audiosignal (34) af et tidsdomæne; og en udgang (35) for audiosignalet (34), kendetegnet ved, at støjudfylderen (50) på sin side omfatter en generator af en spektral kodebog (51); generatoren af en spektral kodebog (51) er indrettet til at oprette en spektral kodebog ved konkatenering af de perceptuelt relevante spektrale koefficienter af de afkodede koefficienter; støjudfylderen (50) er indrettet til at udfylde de spektrale huller med elementer udvalgt fra den spektrale kodebog i henhold til mindst et kriterium; hvor et af det mindst ene kriterium er udvælgelse af elementerne fra den spektrale kodebog i indeksrækkefølge, startende fra lavfrekensenden, hvor i-indek-ser tildeles til de spektrale koefficienter, og j-indekser tildeles til elementerne af den spektrale kodebog, hvor de spektrale huller udfyldes blindt ved at øge indeks j lige så meget som indeks i og gennem en cyklisk anvendelse af den spektrale kodebog, hvis der er flere spektrale huller end elementer i den spektrale kodebog.
7. Perceptuel spektral afkoder ifølge krav 6, kendetegnet ved, at generatoren af en spektral kodebog (51) er indrettet til at oprette den spektrale kodebog til at omfatte elementer baseret på perceptuelt relevante afkodede spektrale koefficienter fra en aktuel ramme.
8. Perceptuel spektral afkoder ifølge krav 6 eller 7, kendetegnet ved, at generatoren af en spektral kodebog (51) er indrettet til at oprette den spektrale kodebog til at omfatte elementer baseret på perceptuelt relevante afkodede spektrale koefficienter fra mindst en blandt en tidligere ramme og en fremtidig ramme.
9. Perceptuel spektral afkoder ifølge et hvilket som helst af kravene 6 til 8, kendetegnet ved, at støjudfylderen (50) endvidere omfatter en efterbehandlingsindretning, der er indrettet til at efterbehandle den spektrale kodebog, hvor støjudfylderen (50) er indrettet til at udvælge elementerne fra den efterbehand-lede spektrale kodebog.
10. Perceptuel spektral afkoder ifølge et hvilket som helst af kravene 6 til 9, kendetegnet ved, at konverteren (45) omfatter mindst en blandt et invers transformation-afsnit og en invers filterbank.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US96823007P | 2007-08-27 | 2007-08-27 | |
| PCT/SE2008/050968 WO2009029036A1 (en) | 2007-08-27 | 2008-08-26 | Method and device for noise filling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DK2186089T3 true DK2186089T3 (da) | 2019-01-07 |
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Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK18176984.5T DK3401907T3 (da) | 2007-08-27 | 2008-08-26 | Fremgangsmåde og indretning til perceptuel spektral afkodning af et audiosignal omfattende udfyldning af spektrale huller |
| DK08828426.0T DK2186089T3 (da) | 2007-08-27 | 2008-08-26 | Fremgangsmåde og indretning til perceptuel spektral afkodning af et audiosignal inklusive udfyldning af spektrale huller |
| DK19194270.5T DK3591650T3 (da) | 2007-08-27 | 2008-08-26 | Fremgangsmåde og indretning til udfyldning af spektrale huller |
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| Application Number | Title | Priority Date | Filing Date |
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| DK18176984.5T DK3401907T3 (da) | 2007-08-27 | 2008-08-26 | Fremgangsmåde og indretning til perceptuel spektral afkodning af et audiosignal omfattende udfyldning af spektrale huller |
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| DK19194270.5T DK3591650T3 (da) | 2007-08-27 | 2008-08-26 | Fremgangsmåde og indretning til udfyldning af spektrale huller |
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| Country | Link |
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| US (2) | US8370133B2 (da) |
| EP (3) | EP3401907B1 (da) |
| JP (1) | JP5255638B2 (da) |
| CN (1) | CN101809657B (da) |
| CA (1) | CA2698031C (da) |
| DK (3) | DK3401907T3 (da) |
| ES (3) | ES2774956T3 (da) |
| HU (2) | HUE047607T2 (da) |
| MX (1) | MX2010001504A (da) |
| PL (2) | PL3591650T3 (da) |
| PT (1) | PT2186089T (da) |
| WO (1) | WO2009029036A1 (da) |
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Also Published As
| Publication number | Publication date |
|---|---|
| EP3591650B1 (en) | 2020-12-23 |
| US8370133B2 (en) | 2013-02-05 |
| US9111532B2 (en) | 2015-08-18 |
| EP2186089B1 (en) | 2018-10-03 |
| EP2186089A4 (en) | 2011-12-28 |
| US20130218577A1 (en) | 2013-08-22 |
| EP2186089A1 (en) | 2010-05-19 |
| JP5255638B2 (ja) | 2013-08-07 |
| HUE047607T2 (hu) | 2020-05-28 |
| DK3591650T3 (da) | 2021-02-15 |
| HUE041323T2 (hu) | 2019-05-28 |
| US20100241437A1 (en) | 2010-09-23 |
| CN101809657B (zh) | 2012-05-30 |
| PT2186089T (pt) | 2019-01-10 |
| PL3401907T3 (pl) | 2020-05-18 |
| CN101809657A (zh) | 2010-08-18 |
| ES2774956T3 (es) | 2020-07-23 |
| WO2009029036A1 (en) | 2009-03-05 |
| JP2010538317A (ja) | 2010-12-09 |
| CA2698031C (en) | 2016-10-18 |
| EP3401907A1 (en) | 2018-11-14 |
| EP3591650A1 (en) | 2020-01-08 |
| ES2858423T3 (es) | 2021-09-30 |
| EP3401907B1 (en) | 2019-11-20 |
| ES2704286T3 (es) | 2019-03-15 |
| MX2010001504A (es) | 2010-03-10 |
| DK3401907T3 (da) | 2020-03-02 |
| PL3591650T3 (pl) | 2021-07-05 |
| CA2698031A1 (en) | 2009-03-05 |
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