Method and apparatus for decoding/encoding video signal using transform derived from graph template
AssigneeLG Electronics Inc.
InventorsAmir SAID, Hilmi Enes EGILMEZ
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Abstract
There is provided a method for decoding a video signal using a graph-based transform, the method comprising: receiving a template index for a target unit from the video signal, wherein the template index indicates a graph-based transform template to be applied to the target unit; deriving a graph-based transform matrix for the target unit corresponding to the template index; and decoding the target unit based on the graph-based transform matrix.
Claims20
A method for decoding a video signal using a graph-based transform, the method comprising:
- receiving a template index for a target unit from the video signal, wherein the template index indicates a graph-based transform template to be applied to the target unit;
- deriving a graph-based transform matrix for the target unit corresponding to the template index;
- and
- decoding the target unit based on the graph-based transform matrix.
A method for encoding a video signal using a graph-based transform, the method comprising:
- extracting a graph parameter, wherein the graph parameter includes at least one of a vertex parameter set and an edge parameter set;
- generating a base template graph based on the graph parameter;
- generating a template graph set based on adjustment of an edge weight of the base template graph;
- determining a template graph corresponding to a target unit from the template graph set;
- and
- acquiring a graph-based transform kernel through a spectral decomposition of the template graph.
A device for decoding a video signal using a graph-based transform, the device comprising:
- an entropy-decoding unit configured to receive a template index for a target unit from the video signal;
- and
- an inverse transform unit configured to derive a graph-based transform matrix for the target unit corresponding to the template index, and to perform an inverse-transform the target unit based on the graph-based transform matrix,
- wherein the template index indicates a graph-based transform template to be applied to the target unit;
A device for encoding a video signal using a graph-based transform, the device comprising:
- a graph signal generation unit configured to
- generate a base template graph based on a graph parameter, wherein the graph parameter includes at least one of a vertex parameter set and an edge parameter set, and
- generate a template graph set based on adjustment of an edge weight of the base template graph;
- a graph-based transform template determination unit configured to determine a template graph corresponding to a target unit from the template graph set;
- and
- a graph-based transform acquisition unit configured to acquire a graph-based transform kernel through a spectral decomposition of the determined template graph.
Dependencies are inferred from the claim text.