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US 2019/0200026 A1Published application
Apparatus, a method and a computer program for video coding
AssigneeNokia Technologies Oy
InventorsJani LAINEMA, Kemal UGUR
Life of this patent
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Abstract
There is disclosed an apparatus, a method and a computer program for video coding. The apparatus comprises a selector configured for selecting a pixel for prediction; a projection definer configured for determining a projection of said pixel to a set of reference pixels; and a prediction definer configured for selecting one or more reference pixels from said set of reference pixels on the basis of said projection, and using said selected one or more reference pixels to obtain a prediction value for said pixel to be predicted.
Claims25
An apparatus comprising at least a processor, and a memory associated with said processor and having computer coded instructions stored therein, said instructions when executed by the processor causing the apparatus to perform:
- selecting a pixel of a current block for prediction, wherein the pixel of the current block is one of a plurality of pixels in a row or column of the current block;
- determining a set of reference pixels, wherein the set of reference pixels for the plurality of pixels in the row or column of the current block is already decoded pixels on a row above the current block and on a column left of the current block;
- determining a projection of said pixel to the row or column of the set of reference pixels based on a displacement measure expressed with reference to a pixel on the last column and the last row of the current block;
- selecting one or more reference pixels from the set of reference pixels on the basis of said projection;
- and
- obtaining a prediction value for the pixel to be predicted based upon the one or more reference pixels that were selected from the set of reference pixels.
3 more elements
A method comprising:
- selecting, using a processor, a pixel of a current block for prediction, wherein the pixel of the current block is one of a plurality of pixels in a row or column of the current block;
- determining a set of reference pixels, wherein the set of reference pixels for the plurality of pixels in the row or column of the current block is already decoded pixels on a row above the current block and on a column left of the current block;
- determining a projection of said pixel to the row or column of the set of reference pixels based on a displacement measure expressed with reference to a pixel on the last column and the last row of the current block;
- selecting one or more reference pixels from the set of reference pixels on the basis of said projection;
- and
- obtaining a prediction value for the pixel to be predicted based on the one or more reference pixels that were selected from the set of reference pixels.
3 more elements
A computer program product comprising a non-transitory computer readable storage medium having computer coded instructions stored therein, said instructions when executed by a processor cause an apparatus to:
- select a pixel of a current block for prediction, wherein the pixel of the current block is one of a plurality of pixels in a row or column of the current block;
- determine a set of reference pixels, wherein the set of reference pixels for the plurality of pixels in the row or column of the current block is already decoded pixels on a row above the current block and on a column left of the current block;
- determining a projection of said pixel to the row or column of the set of reference pixels based on a displacement measure expressed with reference to a pixel on the last column and the last row of the current block;
- select one or more reference pixels from the set of reference pixels on the basis of said projection;
- and
- obtain a prediction value for the pixel to be predicted based on the one or more reference pixels that were selected from the set of reference pixels.
3 more elements
An apparatus, comprising:
- an analyzer configured to examine an indication of a directionality regarding a current block of pixels of an image to be decoded with the current block including a pixel to be predicted which is one of a plurality of pixels in a row or column of the current block;
- and
- a reconstructor configured to:
- determine a set of reference pixels, wherein the set of reference pixels for the plurality of pixels in the row or column of the current block is already decoded pixels on a row above the current block and on a column left of the current block;
- determine a projection of said pixel to the row or column of the set of reference pixels based on a displacement measure expressed with reference to a pixel on the last column and the last row of the current block;
- select one or more reference pixels from the set of reference pixels on the basis of said projection;
- and
- obtain a prediction value for the pixel to be predicted based on the one or more two reference pixels that were selected from the set of reference pixels.
5 more elements
A method, comprising:
- examining an indication of a directionality regarding a current block of pixels of an image to be decoded with the current block including a pixel to be predicted which is one of a plurality of pixels in a row or column of the current block;
- determining, using a processor, a set of reference pixels, wherein the set of reference pixels for the plurality of pixels in the row or column of the current block is already decoded pixels on a row above the current block and on a column left of to current block;
- determining a projection of said pixel to the row or column of the set of reference pixels based on a displacement measure expressed with reference to a pixel on the last column and the last row of the current block;
- selecting one or more reference pixels from the set of reference pixels on the basis of said projection;
- and
- obtaining a prediction value for the pixel to be predicted based on the one or more reference pixels selected from the set of reference pixels.
3 more elements
A computer program product comprising a non-transitory computer readable storage medium having computer coded instructions stored therein, said instructions when executed by a processor cause an apparatus to:
- examine an indication of a directionality regarding a current block of pixels of an image to be decoded with the current block including a pixel to be predicted which is one of a plurality of pixels in a row or column of the current block;
- determine a set of reference pixels, wherein the set of reference pixels for the plurality of pixels in the row or column of the current block is already decoded pixels on a row above the current block and on a column left of the current block;
- determine a projection of said pixel to the row or column of the set of reference pixels based on a displacement measure expressed with reference to a pixel on the last column and the last row of the current block;
- and
- select one or more reference pixels from the set of reference pixels on the basis of said projection;
- and
- obtain a prediction value for the pixel to be predicted based upon the one or more reference pixels that were selected from the set of reference pixels.
4 more elements
Dependencies are inferred from the claim text.