DK3143614T3 - Rekonstruktion af vektorer nedbrudt fra højere-ordens ambisoniske audiosignaler - Google Patents
Rekonstruktion af vektorer nedbrudt fra højere-ordens ambisoniske audiosignaler Download PDFInfo
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- 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
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Claims (17)
1. Indretning konfigureret til at opnå en flerhed af højere-ordens ambisoniske, HOA, koefficienter der er repræsentative for et lydfelt, hvilken indretning omfatter: én eller flere processorer konfigureret til at: opnå fra en bitstrøm data der er indikative for en flerhed af vægtværdier der repræsenterer en vektor, hver af vægtværdierne svarer til en respektiv en af flerheden af vægte i en vægtet sum af kodevektorer der repræsenterer vektoren, vektoren defineret i et sfærisk harmonisk domæne, og representative for en retningsbestemt komponent af et tilsvarende audioobjekt der er til stede i lydfeltet repræsenteret af flerheden af HOA-koefficienter; opnå, fra bitstrømmen, data der er indikative for hvilken af flerheden af kodevektorer der skal anvendes til rekonstruktion af vektoren; vælge et undersæt af kodevektorer baseret på de data der er indikative for hvilken af flerheden af kodevektorer der skal anvendes til rekonstruktion af vektoren; rekonstruktion af vektorer baseret på vægtværdierne og det valgte undersæt af kodevektorer; og render, baseret på den rekonstruerede vektor, højtalertilførsel til playback af højtalere for at reproducere lydfeltet; en hukommelse koblet til den ene eller flere processorer, og og konfigureret til at lagre den rekonstruerede vektor.
2. Indretningen ifølge krav 1, hvor den ene eller flere processorer yderligere er konfigureret til at en vægtet sum af det valgte undersæt af kodevektorer hvor det valgte undersæt af kodevektorer vægtes af vægtværdierne.
3. Indretningen ifølge krav 1, hvor den ene eller flere processorer yderligere er konfigureret til: for hver af vægtværdierne, gange vægtværdien af en respektiv af kodevektorerne for at generere en respektiv vægtet kodevektor omfattet i en flerhed af vægtede kodevektorer; og opsummere flerheden af vægtede kodevektorer for at bestemme vektoren.
4. Indretningen ifølge krav 1, hvor den ene eller flere processorer yderligere er konfigureret til: for hver af vægtværdierne, gange vægtværdien af en respektiv af kodevektorer i undersættet af kodevektorer for at generere en respektiv vægtet kodevektor; og opsummere flerheden af vægtede kodevektorer for at bestemme vektoren.
5. Indretningen ifølge krav 1, hvor den ene eller flere processorer yderligere er konfigureret til at opnå fra bitstrømmen de data der er indikative for en flerhed af vægtværdier der betegner vektoren der er omfattet i den nedbrudte version af flerheden af HOA-koefficienter, hver af vægtværdierne svarende til den respektive ene af flerheden af vægte i den vægtede sum af kodevektorer der repræsenterer vektoren og som omfatter sættet af kodevektorer, sættet af kodevektorer omfatter mindst én af et sæt af retningsbestemte vektorer, et sæt af orthogonale retningsbestemte vektorer, et sæt af orthonormale retningsbestemte vektorer, et sæt af pseudo-orthonormale retningsbestemte vektorer, et sæt af pseudo-orthogonale retningsbestemte vektorer, et sæt af retningsbestemte basisvektorer, et sæt af orthogonale vektorer, et sæt af orthonormale vektorer, et sæt af pseudo-orthonormale vektorer, et sæt af pseudo-orthogonale vektorer, og et sæt af basis vektorer.
6. Indretningen ifølge krav 1, yderligere omfattende højtalere drevet af højtalertilførslen for at reproducere lydfeltet, højtalere koblet til den ene eller flere processorer.
7. Indretningen ifølge krav 1, hvor den ene eller flere processorer yderligere er konfigureret til at en vægtet sum af det valgte undersæt af kodevektorer hvor det valgte undersæt af kodevektorer vægtes af vægtværdierne.
8. Indretningen ifølge krav 1, hvor den ene eller flere processorer yderligere er konfigureret til at for hver af vægtværdierne, gange vægtværdien af en respektiv en af det valgte undersæt af kodevektorer for at generere en respektiv vægtet kodevektor omfattet i en flerhed af vægtede kodevektorer; og opsummere flerheden af vægtede kodevektorer for at bestemme vektoren.
9. Indretningen ifølge krav 1, yderligere omfattende højtalere, hvor den ene eller flere processorer er koblet til højtalere.
10. Indretningen ifølge krav 1, hvor den ene eller flere processorer yderligere er konfigureret til at retablere HOA-koefficienter baseret på den rekonstruerede vektor og gengive HOA-koefficienterne til højtalertilførsel, og hvor indretningen yderligere omfatter højtalere drevet af højtalertilførslen til at reproducere et lydfelt vist af HOA-koefficienterne.
11. Fremgangsmåde til opnåelse af en flerhed af højere-ordens ambisoniske, HOA, koefficienter der er repræsentative for et lydfelt, hvilken fremgangsmåde omfatter: opnåelse af en audioafkoder og fra en bitstrømdata der er indikative for en flerhed af vægtværdier der repræsenterer en vektor, hver af vægtværdierne svarer til en repræsentativ af flerheden af vægte i en vægtet sum af kodevektorer anvendt til at betegne vektoren defineret i et sfærisk harmonisk domæne, og repræsentative for en retningsbestemt komponent af et tilsvarende audioobjekt til stede i lydfeltet repræsenteret af flerheden af HOA-koefficienter; opnåelse, fra bitstrømmen, data der er indikative for hvilken af flerheden af kodevektorer der skal anvendes til rekonstruktion af vektoren; vælge, af audioafkoderen, et undersæt af kodevektorer baseret på dataet der er indikative for hvilken af flerheden af kodevektorer der skal anvendes til rekonstruktion af vektoren; retablere, af audioafkoderen, vektoren baseret på vægtværdierne og det valgte undersæt af kodevektorer; gengivelse, af audioafkoderen og baseret på den rekonstruerede vektor, højtalertilførsel til playback af højtalere for at reproducere lydfeltet.
12. Fremgangsmåden ifølge krav 11, hvor rekonstruktion af vektoren omfatter bestemmelse af en vægtet sum af det valgte undersæt af kodevektorer hvor det valgte undersæt af kodevektorer vægtes af vægtværdierne.
13. Fremgangsmåden ifølge krav 11, hvor rekonstruktion af vektoren omfatter: for hver af vægtværdierne, gange vægtværdien af en respektiv en af undersættet af kodevektorer for at generere en respektiv vægtet kodevektor omfattet i en flerhed af vægtede kodevektorer; og opsummere flerheden af vægtede kodevektorer for at bestemme vektoren.
14. Fremgangsmåden ifølge krav 11, hvor rekonstruktion af vektoren baseret på vægtværdierne og det valgte undersæt af kodevektorer omfatter: for hver af vægtværdierne, gange vægtværdien af en respektiv en af kodevektorerne i undersættet af kodevektorer for at generere en respektiv vægtet kodevektor omfattet i en flerhed af vægtede kodevektorer; og opsummere flerheden af vægtede kodevektorer for at bestemme vektoren.
15. Fremgangsmåden ifølge krav 1, hvor sættet af kodevektorer omfatter mindst en af et sæt af retningsbestemte vektorer, et sæt af orthogonale retningsbestemte vektorer, et sæt af orthonormale retningsbestemte vektorer, et sæt af pseudo-orthonormale retningsbestemte vektorer, et sæt af pseudo-orthogonale retningsbestemte vektorer, et sæt af retningsbestemte basisvektorer, et sæt af orthogonale vektorer, et sæt af orthonormale vektorer, et sæt af pseudo-orthonormale vektorer, et sæt af pseudo-orthogonale vektorer, og et sæt af basisvektorer.
16. Fremgangsmåden ifølge krav 1, yderligere omfattende rekonstruktion af HOA-koefficienterne baseret på den rekonstruerede vektor, hvor gengivelse af højtalertilførslen omfatter gengivelse, baseret på de rekonstruerede HOA-koefficienter, højtalertilførslen til playback af højtalere for at reproducere lydfeltet.
17. Computer-læsbart medium omfattende kode der, når det eksekveres af en computer, forårsager computeren til at udføre fremgangsmåden ifølge et hvilket som helst af kravene 11 til 16.
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| US201462032440P | 2014-08-01 | 2014-08-01 | |
| US14/712,836 US9852737B2 (en) | 2014-05-16 | 2015-05-14 | Coding vectors decomposed from higher-order ambisonics audio signals |
| PCT/US2015/031156 WO2015175981A1 (en) | 2014-05-16 | 2015-05-15 | Coding vectors decomposed from higher-order ambisonics audio signals |
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