DK2559245T3 - Videokodning under anvendelse af multitræsunderinddeling af billeder - Google Patents

Videokodning under anvendelse af multitræsunderinddeling af billeder Download PDF

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DK2559245T3
DK2559245T3 DK11714644.9T DK11714644T DK2559245T3 DK 2559245 T3 DK2559245 T3 DK 2559245T3 DK 11714644 T DK11714644 T DK 11714644T DK 2559245 T3 DK2559245 T3 DK 2559245T3
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Heiner Kirchhoffer
Martin Winken
Philipp Helle
Detlev Marpe
Thomas Wiegand
Heiko Schwarz
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Ge Video Compression Llc
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Claims (14)

1. Dekoder omfattende: en ekstraktionsenhed (102) konfigureret til at ekstrahere en maksimal regionsstørrelse og multitræsunderinddelt information fra en datastrøm; en underinddeler (104a) konfigureret til spatialt at dele et array af informationssamples, der udgør et spatialt samplet informationssignal, i trærodsregioner af den maksimale regionsstørrelse og at underinddele, i overensstemmelse med en multitræsunderinddelt information, mindst en delmængde af trærodsregionerne i mindre, simpelt forbundne regioner af forskellige størrelser ved rekursivt at multi-opdele delmængden af trærodsregioner; og en rekonstrueringsenhed (106) konfigureret til at rekonstruere arrayet af samples fra datastrømmen ved hjælp af underinddelingen i de mindre, simpelt forbundne regioner; hvor rekonstrueringsenheden er konfigureret til at foretage en prognose for arrayet af informationssamples med en granularitet, der afhænger af underinddelingen i mindre, simpelt forbundne regioner, og ekstraktionsenheden er konfigureret til at ekstrahere underordnet multitræsunderinddelt information fra datastrømmen, og hvor dekoderen endvidere omfatter: en yderligere underinddeler (104a) konfigureret til at underinddele, i overensstemmelse med den underordnede multitræsunderinddelte information, mindst en delmængde af de mindre, simpelt forbundne regioner i endnu mindre, simpelt forbundne regioner ved rekursivt at multiopdele delmængden af de mindre, simpelt forbundne regioner, hvor rekonstrueringsenheden er konfigureret til at udføre en retransformation fra spektral til spatial domæne i enheder af de endnu mindre, simpelt forbundne regioner, og hvor ekstraktionsenheden er konfigureret til at ekstrahere en yderligere maksimal regionsstørrelse fra datastrømmen, og hvor den yderligere underinddeler er konfigureret til at dele hver enkelt mindre, simpelt forbundne region, der overstiger den yderligere maksimale regionsstørrelse, i trærodsunderregioner af den yderligere maksimale regionsstørrelse og underinddele, i overensstemmelse med den underordnede multitræsunderinddelte information, mindst delmængden af trærodsunderregionerne i de endnu mindre, simpelt forbundne regioner, hvor den yderligere underinddeler er konfigureret til i underinddelingen af delmængden af mindre, simpelt forbundne regioner, at kontrollere (402), for hver enkelt mindre, simpelt forbundne region, hvorvidt den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, og, hvis den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, at dele den respektive mindre, simpelt forbundne region i trærodsunderregioner af den yderligere maksimale regionsstørrelse; for hver enkelt trærodsunderregion, at kontrollere (304) den underordnede multitræsunderinddelte information for, hvorvidt den respektive trærodsunderregion skal opdeles, og hvis den respektive trærodsunderregion skal opdeles, at opdele (306) den respektive trærodsunderregion i under-underregioner, og rekursivt at gentage kontrollen og opdelingen (304, 306) for under-underregionerne indtil yderligere opdeling ikke skal udføres ifølge den underordnede multitræs-underinddelte information, eller et yderligere maksimalt hierarkiniveau er opnået, og hvor for mindre, simpelt forbundne regioner, der ikke overstiger den yderligere maksimale regionsstørrelse, delingen i trærodsunderregioner udelades.
2. Dekoder ifølge krav 1, hvor rekonstrueringsenheden er konfigureret til, for en mindre, simpelt forbundet region, at beregne, for hver endnu mindre, simpelt forbundne region af de mindre, simpelt forbundne regioner, ved hjælp af en afkodningsrækkefølge, et prognosesignal p, der benytter en intra-prognose indstilling af den mindre, simpelt forbundne region og rekonstruerede samples af tilgrænsende endnu mindre, simpelt forbundne regioner ud fra en buffer, og beregne et rekonstrueret signal r ved at tilføje prognosesignalet p til en rekonstrueret rest af den endnu mindre, simpelt forbundne region med lagring af det rekonstruerede signal r i bufferen til en næstfølgende intra-prognose.
3. Dekoder ifølge krav 1 eller 2, hvor underinddeleren er konfigureret til at udføre inddelingen af arrayet af informationssamples i trærodsregioner således, at trærodsregionerne er rektangulære blokke af en størrelse bestemt af den maksimale regionsstørrelse, regelmæssigt arrangeret således at de uden huller dækker arrayet af informationssamples.
4. Dekoder ifølge ethvert af kravene 1 til 3, hvor underinddeleren er konfigureret til, i underinddelingen af delmængden af trærodsregioner, at kontrollere, for hver enkelt trærodsregion, den multitræsunderinddelte information for hvorvidt den respektive trærodsregion skal opdeles, og hvis den respektive trærodsregion skal opdeles, at opdele den respektive trærodsregion i regioner af et første hierarkiniveau ifølge en delingsregel tilknyttet det første hierarkiniveau, og rekursivt at gentage kontrollen og opdelingen for regionerne i det første hierarkiniveau for at opnå regioner af højere hierarkiniveauer ved hjælp af inddelingsregler tilknyttet hertil, med stop af den rekursive gentagelse når yderligere opdeling ikke skal udføres ifølge den multitræsunderinddelte information, eller et maksimalt hierarkiniveau er opnået, hvor regioner af delmængden af trærodsregioner, der ikke er opdelt yderligere i overensstemmelse med den multitræsunderinddelte information, udgør henholdsvis de mindre, simpelt forbundne regioner og bladregionerne af multi-træsunderinddelingen.
5. Dekoder ifølge krav 4, hvor ekstraktionsenheden er konfigureret til at ekstrahere også det maksimale hierarkiniveau fra datastrømmen.
6. Dekoder ifølge krav 4 eller 5, hvor underinddeleren er konfigureret til, i overensstemmelse med opdelingsreglerne tilknyttet det første hierarkiniveau og højere hierarkiniveauer, at udføre en opdeling i underregioner af samme størrelse, således at antallet af underregioner, der opnås, er fælles for alle hierarkiniveauer.
7. Dekoder ifølge ethvert af kravene 4 til 6, hvor ekstraktionsenheden er konfigureret til at ekstrahere syntakselementer tilknyttet bladregionerne af delmængden af trærodsregioner i en dybde-først traversal rækkefølge fra datastrømmen.
8. Dekoder ifølge ethvert af kravene 4 til 7, hvor den multitræsunderinddelte information har et opdelingsindikationsflag tilknyttet henholdsvis hver enkelt træ rodsregion og regioner fra det første hierarkiniveau og højere hierarkiniveauer, der ikke tilhører regionerne fra det maksimale hierarkiniveau, hvor opdelingsindikationsflaget indikerer, hvorvidt henholdsvis den tilknyttede trærodsregion og regionen fra det første hierarkiniveau og højere hierarkiniveauer er opdelt.
9. Dekoder ifølge ethvert af de ovenstående krav, endvidere omfattende en sammenlægger konfigureret til at kombinere, afhængigt af en første delmængde af syntakselementer af datastrømmen, adskilt fra en anden delmængde af syntakselementer af datastrømmen, der danner den multitræsunderinddelte information, spatialt tilgrænsende regioner af de mindre, simpelt forbundne regioner for at opnå en mellemliggende underinddeling af arrayet af informationssamples, hvor rekonstrueringsenheden er konfigureret til at rekonstruere arrayet af informationssamples ved hjælp af den mellemliggende underinddeling.
10. Dekoder ifølge krav 9, hvor arrayet af informationssamples er en simpelt forbundet del af et overordnet array af informationssamples, hvor dekoderen omfatter en prognoseenhed konfigureret til at prognosticere arrayet af informationssamples fra datastrømmen, hvor rekonstrueringsenheden er konfigureret til at udføre en retransformation fra spektral til spatial domæne i enheder af de endnu mindre, simpelt forbundne regioner for at opnå en rest til arrayet af informationssamples, og til at kombinere resten og prognosen af arrayet af informationssamples for at rekonstruere arrayet af informationssamples.
11. Fremgangsmåde til afkodning omfattende: at ekstrahere (102) en maksimal regionsstørrelse og multitræsunderinddelt information fra en datastrøm; og spatialt at dele (104a) et array af informationssamples, der udgør et spatialt samplet informationssignal, i trærodsregioner af den maksimale regionsstørrelse, og underinddele, i overensstemmelse med en multitræsunderinddelt information, mindst en delmængde af trærodsregionerne i mindre, simpelt forbundne regioner af forskellige størrelser ved rekursivt at multiopdele delmængden af trærodsregioner; og at rekonstruere (106) arrayet af samples fra datastrømmen ved hjælp af underinddelingen i de mindre, simpelt forbundne regioner, hvor rekonstrueringen omfatter at prognosticere arrayet af informationssamples med en granularitet, der afhænger af underinddelingen i mindre, simpelt forbundne regioner, og fremgangsmåden endvidere omfatter at ekstrahere underordnede multitræsunderinddelt information fra datastrømmen, og hvor fremgangsmåden endvidere omfatter: en yderligere underinddeling (104a), i overensstemmelse med den underordnede multitræsunderinddelte information, af mindst en delmængde af de mindre, simpelt forbundne regioner i endnu mindre, simpelt forbundne regioner ved rekursivt at multiopdele delmængden af de mindre, simpelt forbundne regioner, hvor rekonstrueringen omfatter at udføre en retransformation fra spektral til spatial domæne i enheder af de endnu mindre, simpelt forbundne regioner, og hvor fremgangsmåden endvidere omfatter at ekstrahere en yderligere maksimal regionsstørrelse fra datastrømmen, og den yderligere underinddeling omfatter at dele hver enkelt mindre, simpelt forbundne region, der overstiger den yderligere maksimale regionsstørrelse, i trærodsunderregioner af den yderligere maksimale regionsstørrelse og underinddele, i overensstemmelse med den underordnede multitræsunderinddelte information, mindst delmængden af trærodsunderregionerne i de endnu mindre, simpelt forbundne regioner, og hvor underinddelingen af delmængden af mindre, simpelt forbundne regioner omfatter at kontrollere (402), for hver enkelt mindre, simpelt forbundne region, den underordnede multitræsunderinddelte information for, hvorvidt den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, og, hvis den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, at dele den respektive mindre, simpelt forbundne region i trærodsunderregioner af den yderligere maksimale regionsstørrelse; for hver enkelt trærodsunderregion, at kontrollere (304), hvorvidt den respektive trærodsunderregion skal opdeles, og hvis den respektive trærodsunderregion skal opdeles, at opdele (306) den respektive trærodsunderregion i under-underregioner, og rekursivt at gentage kontrollen (304) og opdelingen (306) for under-underregionerne indtil yderligere opdeling ikke skal udføres ifølge den underordnede multitræsunderinddelte information, eller et yderligere maksimalt hierarkiniveau er opnået, og hvor for mindre, simpelt forbundne regioner, der ikke overstiger den yderligere maksimale regionsstørrelse, delingen i trærodsunderregioner udelades.
12. Koder omfattende: en underinddeler (28) konfigureret til spatialt at dele et array af informationssamples, der udgør et spatialt samplet informationssignal, i trærodsregioner af en maksimal regionsstørrelse og underinddele, i overensstemmelse med en mul-titræsunderinddelt information, mindst en delmængde af trærodsregionerne i mindre, simpelt forbundne regioner af forskellige størrelser ved rekursivt at multi-opdele delmængden af trærodsregioner; og en datastrømsgenerator (18) konfigureret til at kode arrayet af samples ved hjælp af underinddelingen i de mindre, simpelt forbundne regioner i en datastrøm med indsættelse af den maksimale regionsstørrelse og multitræsunderinddelt information i datastrømmen, hvor datastrømsgeneratoren er konfigureret til at foretage en prognose (12) for arrayet af informationssamples med en granularitet, der afhænger af underinddelingen i mindre, simpelt forbundne regioner, og er konfigureret til at indsætte underordnet multitræsunderinddelt information i datastrømmen, og hvor koderen endvidere omfatter: en yderligere underinddeler (28) konfigureret til at underinddele, i overensstemmelse med den underordnede multitræsunderinddelte information, mindst en delmængde af de mindre, simpelt forbundne regioner i endnu mindre, simpelt forbundne regioner ved rekursivt at multiopdele delmængden af de mindre, simpelt forbundne regioner, hvor datastrømsgeneratoren er konfigureret til at udføre en transformation fra spatial domæne til spektral domæne i enheder af de endnu mindre, simpelt forbundne regioner, og hvor datastrømsgeneratoren (18) er konfigureret til at indsætte en yderligere maksimal regionsstørrelse i datastrømmen, og hvor den yderligere underinddeler er konfigureret til at dele hver enkelt mindre, simpelt forbundne region, der overstiger den yderligere maksimale regionsstørrelse, i trærodsunderregioner af den yderligere maksimale regionsstørrelse, og underinddele, i overensstemmelse med den underordnede multitræsunderinddelte information, mindst delmængden af trærodsunderregionerne i de endnu mindre, simpelt forbundne regioner, og hvor den yderligere underinddeler (28) er konfigureret til, i underinddelingen af delmængden af mindre, simpelt forbundne regioner, at kontrollere (402), for hver enkelt mindre, simpelt forbundne region, den underordnede multitræsunderinddelte information for, hvorvidt den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, og, hvis den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, at dele den respektive mindre, simpelt forbundne region i trærodsunderregioner af den yderligere maksimale regionsstørrelse; for hver enkelt trærodsunderregion, at kontrollere (304), hvorvidt den respektive trærodsunderregion skal opdeles, og hvis den respektive trærodsunderregion skal opdeles, at opdele (306) den respektive trærodsunderregion i under-underregioner, og rekursivt at gentage kontrollen (304) og opdelingen (306) for under-underregionerne indtil yderligere opdeling ikke skal udføres ifølge den underordnede multitræsunderinddelte information, eller et yderligere maksimalt hierarkiniveau er opnået, og hvor for mindre, simpelt forbundne regioner, der ikke overstiger den yderligere maksimale regionsstørrelse, delingen i trærodsunderregioner udelades
13. Fremgangsmåde til kodning omfattende: spatialt at dele (28) et array af informationssamples, der udgør et spatialt samplet informationssignal, i trærodsregioner af en maksimal regionsstørrelse, og underinddele, i overensstemmelse med en multitræsunderinddelt information, mindst en delmængde af trærodsregionerne i mindre, simpelt forbundne regioner af forskellige størrelser ved rekursivt at multiopdele delmængden af trærodsregioner; og at kode arrayet af samples ved hjælp af underinddelingen i de mindre, simpelt forbundne regioner i en datastrøm med indsættelse af den maksimale regionsstørrelse og multitræsunderinddelt information i datastrømmen, hvor kodningen omfatter at foretage en prognose (12) af arrayet af informationssamples med en granularitet, der afhænger af underinddelingen i mindre, simpelt forbundne regioner med indsættelse af underordnet multitræsunderinddelt information i datastrømmen, og hvor fremgangsmåden endvidere omfatter: en yderligere underinddeling (28), i overensstemmelse med den underordnede multitræsunderinddelte information, af mindst en delmængde af de mindre, simpelt forbundne regioner i endnu mindre, simpelt forbundne regioner ved rekursivt at multiopdele delmængden af de mindre, simpelt forbundne regioner, hvor re-konstrueringsenheden er konfigureret til at udføre en retransformation fra spek-tral til spatial domæne i enheder af de endnu mindre, simpelt forbundne regioner, og hvor fremgangsmåden endvidere omfatter at indsætte en yderligere maksimal regionsstørrelse i datastrømmen, og den yderligere underinddeling omfatter at dele hver enkelt mindre, simpelt forbundne region, der overstiger den yderligere maksimale regionsstørrelse, i trærodsunderregioner af den yderligere maksimale regionsstørrelse, og underinddele, i overensstemmelse med den underordnede multitræsunderinddelte information, mindst delmængden af trærodsunderregio-neme i de endnu mindre, simpelt forbundne regioner, hvor underinddelingen af delmængden af mindre, simpelt forbundne regioner omfatter at kontrollere (402), for hver enkelt mindre, simpelt forbundne region, den underordnede multitræsunderinddelte information for, hvorvidt den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, og, hvis den respektive mindre, simpelt forbundne region overstiger den yderligere maksimale regionsstørrelse, at dele den respektive mindre, simpelt forbundne region i trærodsunderregioner af den yderligere maksimale regionsstørrelse; for hver enkelt trærodsunderregion, at kontrollere (304), hvorvidt den respektive trærodsunderregion skal opdeles, og hvis den respektive trærodsunderregion skal opdeles, at opdele (306) den respektive trærodsunderregion i under-underregioner, og rekursivt at gentage kontrollen (304) og opdelingen (306) for under-underregionerne indtil yderligere opdeling ikke længere skal udføres ifølge den underordnede multitræsunderinddelte information, eller et yderligere maksimalt hierarkiniveau er opnået, og hvor for mindre, simpelt forbundne regioner, der ikke overstiger den yderligere maksimale regionsstørrelse, delingen i trærodsunderregioner udelades.
14. Computerlæsbart digitalt lagringsmedie, hvorpå der er lagret et computerprogram med en programkode til udførelse af en fremgangsmåde ifølge krav 11 eller 13, når det afvikles på en computer.
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