DK2903277T3 - Fremgangsmåde til afkodning af levende billeder - Google Patents

Fremgangsmåde til afkodning af levende billeder Download PDF

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DK2903277T3
DK2903277T3 DK14197725.6T DK14197725T DK2903277T3 DK 2903277 T3 DK2903277 T3 DK 2903277T3 DK 14197725 T DK14197725 T DK 14197725T DK 2903277 T3 DK2903277 T3 DK 2903277T3
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picture
linear prediction
image
weighting coefficient
equation
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DK14197725.6T
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Kiyofumi Abe
Shinya Kadono
Satoshi Kondo
Makoto Hagai
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Godo Kaisha Ip Bridge 1
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    • H04N19/103—Selection of coding mode or of prediction mode
    • H04N19/105—Selection of the reference unit for prediction within a chosen coding or prediction mode, e.g. adaptive choice of position and number of pixels used for prediction
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  • Compression Or Coding Systems Of Tv Signals (AREA)
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Claims (4)

1. Fremgangsmåde til afkodning af billeder, omfattende: afkode et kodet billedsignal til opnåelse af: et referenceindeks, der identificerer et referencebillede for en aktuel blok, der skal afkodes; en maksimal værdi for referenceindekser; kommandoer, der angiver korrespondance mellem referenceindekserne og referencebillederne; en flerhed af vægtningskoefficientsæt, der anvendes til generering af et prædiktivt billede; og en prædiktionsfejl; udpege, baseret på kommandoerne og referenceindekset, et referencebillede, der refereres til, når den aktuelle blok afkodes ved hjælp af bevægelseskompensation; specificere et vægtningskoefficientsæt, der svarer til referenceindekset, blandt flerheden af vægtningskoefficientsæt; generere det prædiktive billede ved at udføre lineær prædiktion, under anvendelse af det specificerede vægtningskoefficientsæt, på pixelværdier af en referenceblok, der er opnået fra referencebilledet, der er udpeget ved udpegningen; og generere et rekonstrueret billede ud fra det prædiktive billede og prædiktionsfejlen, hvor flerheden af vægtningskoefficientsæt, der anvendes til generering af det prædiktive billede, anbringes i en slice-header af det kodede billedsignal, og hvor den aktuelle blok er en blok, der er indbefattet i et P-billede, og den aktuelle blok afkodes ved at udpege et referencebillede, der refereres til, og hver af flerheden af vægtningskoefficientsæt omfatter en første del w1 og en anden del c1, hvor den første del w1 anvendes til at skalere pixelværdier af referenceblokken, og den anden del c1 anvendes til at forøge hver af de ska-lerede pixelværdier med en værdi på c1, og kendetegnet ved, at de mindst to referenceindekser tildeles til det ene referencebillede, der refereres til af den aktuelle blok, og det ene referencebillede, der refereres til af den aktuelle blok, udpeges af det ene referenceindeks af de mindst to referenceindekser.
2. Billedafkodningsindretning omfattende: en enhed til afkodning af et kodet billedsignal, der kan anvendes til at afkode et kodet billedsignal til opnåelse af: et referenceindeks, der identificerer et referencebillede for en aktuel blok, der skal afkodes; en maksimal værdi for referenceindekser; kommandoer, der angiver korrespondance mellem referenceindekserne og referencebillederne; en flerhed af vægtningskoefficientsæt, der anvendes til generering af et prædiktivt billede; og en prædiktionsfejl; en enhed til udpegning af et referencebillede, der kan anvendes til at udpege, baseret på kommandoerne og referenceindekset, et referencebillede, der refereres til, når den aktuelle blok afkodes ved hjælp af bevægelseskompensation; en enhed til specificering af et vægtningskoefficientsæt, der kan anvendes til at specificere et vægtningskoefficientsæt, der svarer til referenceindekset, blandt flerheden af vægtningskoefficientsæt; en enhed til generering af et prædiktivt billede, der kan anvendes til at generere det prædiktive billede ved at udføre lineær prædiktion, under anvendelse af det specificerede vægtningskoefficientsæt, på pixelværdier af en referenceblok, der er opnået fra referencebilledet, der er udpeget af enheden til udpegning af referencebilledet; og en enhed til generering af et rekonstrueret billede, der kan anvendes til at generere et rekonstrueret billede ud fra det prædiktive billede og prædiktionsfejlen, hvor flerheden af vægtningskoefficientsæt, der anvendes til generering af det prædiktive billede, anbringes i en slice-header af det kodede billedsignal, og hvor den aktuelle blok er en blok, der er indbefattet i et P-billede, og den aktuelle blok afkodes ved at udpege et referencebillede, der refereres til, og hver af flerheden af vægtningskoefficientsæt omfatter en første del w1 og en anden del c1, hvor den første del w1 anvendes til at skalere pixelværdier af referenceblokken, og den anden del c1 anvendes til at forøge hver af de ska-lerede pixelværdier med en værdi på c1, og kendetegnet ved, at de mindst to referenceindekser tildeles til det ene referencebillede, der refereres til af den aktuelle blok, og det ene referencebillede, der refereres til af den aktuelle blok, udpeges af det ene referenceindeks af de mindst to referenceindekser.
3. Ikke-midlertidigt computerlæsbart medium med et program gemt derpå til at bevirke, at en computer udfører en fremgangsmåde til afkodning af billeder, hvilken fremgangsmåde til afkodning af billeder omfatter: afkode et kodet billedsignal til opnåelse af: et referenceindeks, der identificerer et referencebillede for en aktuel blok, der skal afkodes; en maksimal vær di for referenceindekser; kommandoer, der angiver korrespondance mellem referenceindekserne og referencebillederne; en flerhed af vægtningskoefficientsæt, der anvendes til generering af et prædiktivt billede; og en prædiktionsfejl; udpege, baseret på kommandoerne og referenceindekset, et referencebillede, der refereres til, når den aktuelle blok afkodes ved hjælp af bevægelseskompensation; specificere et vægtningskoefficientsæt, der svarer til referenceindekset, blandt flerheden af vægtningskoefficientsæt; generere det prædiktive billede ved at udføre lineær prædiktion, under anvendelse af det specificerede vægtningskoefficientsæt, på pixelværdier af en referenceblok, der er opnået fra referencebilledet, der er udpeget ved udpegningen; og generere et rekonstrueret billede ud fra det prædiktive billede og prædiktionsfejlen, hvor flerheden af vægtningskoefficientsæt, der anvendes til generering af det prædiktive billede, anbringes i en slice-header af det kodede billedsignal, og hvor den aktuelle blok er en blok, der er indbefattet i et P-billede, og den aktuelle blok afkodes ved at udpege et referencebillede, der refereres til, og hver af flerheden af vægtningskoefficientsæt omfatter en første del w1 og en anden del c1, hvor den første del w1 anvendes til at skalere pixelværdier af referenceblokken, og den anden del c1 anvendes til at forøge hver af de ska-lerede pixelværdier med en værdi på c1, og kendetegnet ved, at de mindst to referenceindekser tildeles til det ene referencebillede, der refereres til af den aktuelle blok, og det ene referencebillede, der refereres til af den aktuelle blok, udpeges af det ene referenceindeks af de mindst to referenceindekser.
4. Fremgangsmåde til afkodning af billeder ifølge krav 1, hvor den maksimale værdi for referenceindekser beskrives i en billede-header af det kodede billedsignal, og hvor den maksimale værdi af referenceindekser kan ændres på slice-by-slice-basis.
DK14197725.6T 2002-08-08 2003-07-22 Fremgangsmåde til afkodning af levende billeder DK2903277T3 (da)

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JP2002232160 2002-08-08
JP2002273992 2002-09-19
JP2002289294 2002-10-01
JP2002296726 2002-10-09
JP2002370722 2002-12-20
JP2003008751 2003-01-16
EP07123844A EP1906671A3 (en) 2002-08-08 2003-07-22 Moving picture encoding method and decoding method

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